//! MCP story tools — create, update, move, and manage stories, bugs, and refactors via MCP.
use crate::agents::{
    close_bug_to_archive, feature_branch_has_unmerged_changes, move_story_to_done,
};
use crate::http::context::AppContext;
use crate::http::workflow::{
    add_criterion_to_file, check_criterion_in_file, create_bug_file, create_refactor_file,
    create_spike_file, create_story_file, list_bug_files, list_refactor_files, load_pipeline_state,
    load_upcoming_stories, update_story_in_file, validate_story_dirs,
};
use crate::io::story_metadata::{
    check_archived_deps, check_archived_deps_from_list, parse_front_matter, parse_unchecked_todos,
};
use crate::slog_warn;
use crate::workflow::{TestCaseResult, TestStatus, evaluate_acceptance_with_coverage};
use serde_json::{Value, json};
use std::collections::HashMap;
use std::fs;

pub(super) fn tool_create_story(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let name = args
        .get("name")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: name")?;
    let user_story = args.get("user_story").and_then(|v| v.as_str());
    let description = args.get("description").and_then(|v| v.as_str());
    let acceptance_criteria: Option<Vec<String>> = args
        .get("acceptance_criteria")
        .and_then(|v| serde_json::from_value(v.clone()).ok());
    let depends_on: Option<Vec<u32>> = args
        .get("depends_on")
        .and_then(|v| serde_json::from_value(v.clone()).ok());
    // Spike 61: write the file only — the filesystem watcher detects the new
    // .md file in work/1_backlog/ and auto-commits with a deterministic message.
    let commit = false;

    let root = ctx.state.get_project_root()?;
    let story_id = create_story_file(
        &root,
        name,
        user_story,
        description,
        acceptance_criteria.as_deref(),
        depends_on.as_deref(),
        commit,
    )?;

    // Bug 503: warn at creation time if any depends_on points at an already-archived story.
    // Archived = satisfied semantics: the dep will resolve immediately on the next promotion
    // tick, which is surprising if the archived story was abandoned rather than cleanly done.
    let archived_deps = depends_on
        .as_deref()
        .map(|deps| check_archived_deps_from_list(&root, deps))
        .unwrap_or_default();
    if !archived_deps.is_empty() {
        slog_warn!(
            "[create-story] Story '{story_id}' depends_on {archived_deps:?} which \
             are already in 6_archived. The dep will be treated as satisfied on the \
             next promotion tick. If these deps were abandoned (not cleanly completed), \
             consider removing the depends_on or keeping the story in backlog manually."
        );
        return Ok(format!(
            "Created story: {story_id}\n\n\
             WARNING: depends_on {archived_deps:?} point at stories already in \
             6_archived. These deps are treated as satisfied (archived = satisfied \
             semantics), so this story may be auto-promoted from backlog immediately. \
             If the archived deps were abandoned rather than completed, remove the \
             depends_on or move the story back to backlog manually after promotion."
        ));
    }

    Ok(format!("Created story: {story_id}"))
}

/// Purge a story from the in-memory CRDT by writing a tombstone op (story 521).
///
/// This is the eviction primitive for the four-state-machine drift problem
/// we hit on 2026-04-09 — when a story gets stuck in the running server's
/// in-memory CRDT and can't be cleared by sqlite deletes alone (because the
/// in-memory state outlives any pipeline_items / crdt_ops manipulation),
/// this tool writes a proper CRDT delete op via `crdt_state::evict_item`.
///
/// The tombstone op:
///   - Marks the in-memory CRDT item as `is_deleted = true` immediately
///     (so subsequent `read_all_items` / `read_item` calls skip it)
///   - Is persisted to `crdt_ops` so the eviction survives a server restart
///   - Drops the in-memory `CONTENT_STORE` entry for the story
///
/// This tool does NOT touch: running agents, worktrees, the `pipeline_items`
/// shadow table, `timers.json`, or filesystem shadows. Compose with
/// `stop_agent`, `remove_worktree`, etc. as needed for a full purge — or
/// see story 514 (delete_story full cleanup) for a future "do it all" tool.
pub(super) fn tool_purge_story(args: &Value, _ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    crate::crdt_state::evict_item(story_id)?;

    Ok(format!(
        "Evicted '{story_id}' from in-memory CRDT (tombstone op persisted to crdt_ops; CONTENT_STORE entry dropped)."
    ))
}

pub(super) fn tool_validate_stories(ctx: &AppContext) -> Result<String, String> {
    let root = ctx.state.get_project_root()?;
    let results = validate_story_dirs(&root)?;
    serde_json::to_string_pretty(&json!(
        results
            .iter()
            .map(|r| json!({
                "story_id": r.story_id,
                "valid": r.valid,
                "error": r.error,
            }))
            .collect::<Vec<_>>()
    ))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn tool_list_upcoming(ctx: &AppContext) -> Result<String, String> {
    let stories = load_upcoming_stories(ctx)?;
    serde_json::to_string_pretty(&json!(
        stories
            .iter()
            .map(|s| json!({
                "story_id": s.story_id,
                "name": s.name,
                "error": s.error,
            }))
            .collect::<Vec<_>>()
    ))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn tool_get_pipeline_status(ctx: &AppContext) -> Result<String, String> {
    let state = load_pipeline_state(ctx)?;

    fn map_items(items: &[crate::http::workflow::UpcomingStory], stage: &str) -> Vec<Value> {
        items
            .iter()
            .map(|s| {
                let mut item = json!({
                    "story_id": s.story_id,
                    "name": s.name,
                    "stage": stage,
                    "agent": s.agent.as_ref().map(|a| json!({
                        "agent_name": a.agent_name,
                        "model": a.model,
                        "status": a.status,
                    })),
                });
                // Include blocked/retry_count when present so callers can
                // identify stories stuck in the pipeline.
                if let Some(true) = s.blocked {
                    item["blocked"] = json!(true);
                }
                if let Some(rc) = s.retry_count {
                    item["retry_count"] = json!(rc);
                }
                if let Some(ref mf) = s.merge_failure {
                    item["merge_failure"] = json!(mf);
                }
                item
            })
            .collect()
    }

    let mut active: Vec<Value> = Vec::new();
    active.extend(map_items(&state.current, "current"));
    active.extend(map_items(&state.qa, "qa"));
    active.extend(map_items(&state.merge, "merge"));
    active.extend(map_items(&state.done, "done"));

    let backlog: Vec<Value> = state
        .backlog
        .iter()
        .map(|s| json!({ "story_id": s.story_id, "name": s.name }))
        .collect();

    serde_json::to_string_pretty(&json!({
        "active": active,
        "backlog": backlog,
        "backlog_count": backlog.len(),
    }))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn tool_get_story_todos(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let root = ctx.state.get_project_root()?;

    // Read from DB content store, falling back to filesystem.
    let contents = crate::http::workflow::read_story_content(&root, story_id)
        .map_err(|_| format!("Story file not found: {story_id}.md"))?;

    let story_name = parse_front_matter(&contents).ok().and_then(|m| m.name);
    let todos = parse_unchecked_todos(&contents);

    serde_json::to_string_pretty(&json!({
        "story_id": story_id,
        "story_name": story_name,
        "todos": todos,
    }))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn tool_record_tests(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let unit = parse_test_cases(args.get("unit"))?;
    let integration = parse_test_cases(args.get("integration"))?;

    let mut workflow = ctx
        .workflow
        .lock()
        .map_err(|e| format!("Lock error: {e}"))?;

    workflow.record_test_results_validated(story_id.to_string(), unit, integration)?;

    // Persist to story file (best-effort — file write errors are warnings, not failures).
    if let Ok(project_root) = ctx.state.get_project_root()
        && let Some(results) = workflow.results.get(story_id)
        && let Err(e) = crate::http::workflow::write_test_results_to_story_file(
            &project_root,
            story_id,
            results,
        )
    {
        slog_warn!("[record_tests] Could not persist results to story file: {e}");
    }

    Ok("Test results recorded.".to_string())
}

pub(super) fn tool_ensure_acceptance(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let workflow = ctx
        .workflow
        .lock()
        .map_err(|e| format!("Lock error: {e}"))?;

    // Use in-memory results if present; otherwise fall back to file-persisted results.
    let file_results;
    let results = if let Some(r) = workflow.results.get(story_id) {
        r
    } else {
        let project_root = ctx.state.get_project_root().ok();
        file_results = project_root.as_deref().and_then(|root| {
            crate::http::workflow::read_test_results_from_story_file(root, story_id)
        });
        file_results.as_ref().map_or_else(
            || {
                // No results anywhere — use empty default for the acceptance check
                // (it will fail with "No test results recorded")
                static EMPTY: std::sync::OnceLock<crate::workflow::StoryTestResults> =
                    std::sync::OnceLock::new();
                EMPTY.get_or_init(Default::default)
            },
            |r| r,
        )
    };

    let coverage = workflow.coverage.get(story_id);
    let decision = evaluate_acceptance_with_coverage(results, coverage);

    if decision.can_accept {
        Ok("Story can be accepted. All gates pass.".to_string())
    } else {
        let mut parts = decision.reasons;
        if let Some(w) = decision.warning {
            parts.push(w);
        }
        Err(format!("Acceptance blocked: {}", parts.join("; ")))
    }
}

pub(super) fn tool_accept_story(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let project_root = ctx.agents.get_project_root(&ctx.state)?;

    // Bug 226: Refuse to accept if the feature branch has unmerged code.
    // The code must be squash-merged via merge_agent_work first.
    if feature_branch_has_unmerged_changes(&project_root, story_id) {
        return Err(format!(
            "Cannot accept story '{story_id}': feature branch 'feature/story-{story_id}' \
             has unmerged changes. Use merge_agent_work to squash-merge the code into \
             master first."
        ));
    }

    move_story_to_done(&project_root, story_id)?;
    ctx.agents.remove_agents_for_story(story_id);

    Ok(format!(
        "Story '{story_id}' accepted, moved to done/, and committed to master."
    ))
}

pub(super) fn tool_check_criterion(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;
    let criterion_index = args
        .get("criterion_index")
        .and_then(|v| v.as_u64())
        .ok_or("Missing required argument: criterion_index")? as usize;

    let root = ctx.state.get_project_root()?;
    check_criterion_in_file(&root, story_id, criterion_index)?;

    Ok(format!(
        "Criterion {criterion_index} checked for story '{story_id}'. Committed to master."
    ))
}

pub(super) fn tool_add_criterion(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;
    let criterion = args
        .get("criterion")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: criterion")?;

    let root = ctx.state.get_project_root()?;
    add_criterion_to_file(&root, story_id, criterion)?;

    Ok(format!(
        "Added criterion to story '{story_id}': - [ ] {criterion}"
    ))
}

pub(super) fn tool_update_story(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;
    let user_story = args.get("user_story").and_then(|v| v.as_str());
    let description = args.get("description").and_then(|v| v.as_str());

    // Collect front matter fields: explicit `agent` param + arbitrary `front_matter` object.
    // Values are passed as serde_json::Value so native booleans, numbers, and arrays are
    // preserved and encoded correctly as unquoted YAML by update_story_in_file.
    let mut front_matter: HashMap<String, Value> = HashMap::new();
    if let Some(agent) = args.get("agent").and_then(|v| v.as_str()) {
        front_matter.insert("agent".to_string(), Value::String(agent.to_string()));
    }
    if let Some(obj) = args.get("front_matter").and_then(|v| v.as_object()) {
        for (k, v) in obj {
            front_matter.insert(k.clone(), v.clone());
        }
    }
    let front_matter_opt = if front_matter.is_empty() {
        None
    } else {
        Some(&front_matter)
    };

    let root = ctx.state.get_project_root()?;
    update_story_in_file(&root, story_id, user_story, description, front_matter_opt)?;

    // Bug 503: warn if any depends_on in the (now updated) story points at an archived story.
    let stage = crate::pipeline_state::read_typed(story_id)
        .ok()
        .flatten()
        .map(|i| i.stage.dir_name().to_string())
        .unwrap_or_else(|| "1_backlog".to_string());
    let archived_deps = check_archived_deps(&root, &stage, story_id);
    if !archived_deps.is_empty() {
        slog_warn!(
            "[update-story] Story '{story_id}' depends_on {archived_deps:?} which \
             are already in 6_archived. The dep will be treated as satisfied on the \
             next promotion tick. If these deps were abandoned (not cleanly completed), \
             consider removing the depends_on or keeping the story in backlog manually."
        );
        return Ok(format!(
            "Updated story '{story_id}'.\n\n\
             WARNING: depends_on {archived_deps:?} point at stories already in \
             6_archived. These deps are treated as satisfied (archived = satisfied \
             semantics), so this story may be auto-promoted from backlog immediately. \
             If the archived deps were abandoned rather than completed, remove the \
             depends_on or move the story back to backlog manually after promotion."
        ));
    }

    Ok(format!("Updated story '{story_id}'."))
}

pub(super) fn tool_create_spike(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let name = args
        .get("name")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: name")?;
    let description = args.get("description").and_then(|v| v.as_str());

    let root = ctx.state.get_project_root()?;
    let spike_id = create_spike_file(&root, name, description)?;

    Ok(format!("Created spike: {spike_id}"))
}

pub(super) fn tool_create_bug(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let name = args
        .get("name")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: name")?;
    let description = args
        .get("description")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: description")?;
    let steps_to_reproduce = args
        .get("steps_to_reproduce")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: steps_to_reproduce")?;
    let actual_result = args
        .get("actual_result")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: actual_result")?;
    let expected_result = args
        .get("expected_result")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: expected_result")?;
    let acceptance_criteria: Option<Vec<String>> = args
        .get("acceptance_criteria")
        .and_then(|v| serde_json::from_value(v.clone()).ok());

    let root = ctx.state.get_project_root()?;
    let bug_id = create_bug_file(
        &root,
        name,
        description,
        steps_to_reproduce,
        actual_result,
        expected_result,
        acceptance_criteria.as_deref(),
    )?;

    Ok(format!("Created bug: {bug_id}"))
}

pub(super) fn tool_list_bugs(ctx: &AppContext) -> Result<String, String> {
    let root = ctx.state.get_project_root()?;
    let bugs = list_bug_files(&root)?;
    serde_json::to_string_pretty(&json!(
        bugs.iter()
            .map(|(id, name)| json!({ "bug_id": id, "name": name }))
            .collect::<Vec<_>>()
    ))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn tool_close_bug(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let bug_id = args
        .get("bug_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: bug_id")?;

    let root = ctx.agents.get_project_root(&ctx.state)?;
    close_bug_to_archive(&root, bug_id)?;
    ctx.agents.remove_agents_for_story(bug_id);

    Ok(format!(
        "Bug '{bug_id}' closed, moved to bugs/archive/, and committed to master."
    ))
}

pub(super) fn tool_unblock_story(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let root = ctx.state.get_project_root()?;

    // Extract the numeric prefix (e.g. "42" from "42_story_foo")
    let story_number = story_id
        .split('_')
        .next()
        .filter(|s| !s.is_empty() && s.chars().all(|c| c.is_ascii_digit()))
        .ok_or_else(|| format!("Invalid story_id format: '{story_id}'. Expected a numeric prefix (e.g. '42_story_foo')."))?;

    Ok(crate::chat::commands::unblock::unblock_by_number(
        &root,
        story_number,
    ))
}

pub(super) async fn tool_delete_story(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let story_id = args
        .get("story_id")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: story_id")?;

    let project_root = ctx.agents.get_project_root(&ctx.state)?;
    let mut failed_steps: Vec<String> = Vec::new();

    // 0. Cancel any pending rate-limit retry timers for this story (bug 514).
    //    Must happen before stopping agents so the tick loop cannot re-spawn
    //    an agent after we tear everything else down.
    let timer_removed = ctx.timer_store.remove(story_id);
    if timer_removed {
        slog_warn!("[delete_story] Cancelled pending timer for '{story_id}'");
    } else {
        slog_warn!("[delete_story] No pending timer found for '{story_id}'");
    }

    // 1. Stop any running agents for this story (best-effort).
    if let Ok(agents) = ctx.agents.list_agents() {
        for agent in agents.iter().filter(|a| a.story_id == story_id) {
            match ctx
                .agents
                .stop_agent(&project_root, story_id, &agent.agent_name)
                .await
            {
                Ok(()) => {
                    slog_warn!(
                        "[delete_story] Stopped agent '{}' for '{story_id}'",
                        agent.agent_name
                    );
                }
                Err(e) => {
                    slog_warn!(
                        "[delete_story] Failed to stop agent '{}' for '{story_id}': {e}",
                        agent.agent_name
                    );
                    failed_steps.push(format!("stop_agent({}): {e}", agent.agent_name));
                }
            }
        }
    }

    // 2. Remove agent pool entries.
    let removed_count = ctx.agents.remove_agents_for_story(story_id);
    slog_warn!("[delete_story] Removed {removed_count} agent pool entries for '{story_id}'");

    // 3. Remove worktree (best-effort).
    if let Ok(config) = crate::config::ProjectConfig::load(&project_root) {
        match crate::worktree::remove_worktree_by_story_id(&project_root, story_id, &config).await {
            Ok(()) => slog_warn!("[delete_story] Removed worktree for '{story_id}'"),
            Err(e) => slog_warn!("[delete_story] Worktree removal for '{story_id}': {e}"),
        }
    }

    // 4. Write a CRDT tombstone op so the story is evicted from the in-memory
    //    state machine and the deletion is persisted to crdt_ops (survives
    //    restart).  Best-effort: legacy filesystem-only stories may not have a
    //    CRDT entry, so a "not found" error is expected and non-fatal.
    match crate::crdt_state::evict_item(story_id) {
        Ok(()) => {
            slog_warn!(
                "[delete_story] Evicted '{story_id}' from CRDT (tombstone persisted to crdt_ops)"
            );
        }
        Err(e) => {
            slog_warn!("[delete_story] CRDT eviction for '{story_id}': {e}");
        }
    }

    // 5. Delete from database content store and shadow table.
    let found_in_db = crate::db::read_content(story_id).is_some()
        || crate::pipeline_state::read_typed(story_id)
            .ok()
            .flatten()
            .is_some();
    crate::db::delete_item(story_id);
    slog_warn!("[delete_story] Deleted '{story_id}' from content store / shadow table");

    // 6. Remove the filesystem shadow file from work/N_stage/.
    let sk = project_root.join(".huskies").join("work");
    let stage_dirs = [
        "1_backlog",
        "2_current",
        "3_qa",
        "4_merge",
        "5_done",
        "6_archived",
    ];
    let mut deleted_from_fs = false;
    for stage in &stage_dirs {
        let path = sk.join(stage).join(format!("{story_id}.md"));
        if path.exists() {
            match fs::remove_file(&path) {
                Ok(()) => {
                    slog_warn!(
                        "[delete_story] Deleted filesystem shadow '{story_id}' from work/{stage}/"
                    );
                    deleted_from_fs = true;
                }
                Err(e) => {
                    slog_warn!(
                        "[delete_story] Failed to delete filesystem shadow '{story_id}' from work/{stage}/: {e}"
                    );
                    failed_steps.push(format!("delete_filesystem({stage}): {e}"));
                }
            }
            break;
        }
    }

    if !found_in_db && !deleted_from_fs && !timer_removed {
        return Err(format!(
            "Story '{story_id}' not found in any pipeline stage."
        ));
    }

    if !failed_steps.is_empty() {
        return Err(format!(
            "Story '{story_id}' partially deleted. Failed steps: {}.",
            failed_steps.join("; ")
        ));
    }

    Ok(format!("Story '{story_id}' deleted from pipeline."))
}

pub(super) fn tool_create_refactor(args: &Value, ctx: &AppContext) -> Result<String, String> {
    let name = args
        .get("name")
        .and_then(|v| v.as_str())
        .ok_or("Missing required argument: name")?;
    let description = args.get("description").and_then(|v| v.as_str());
    let acceptance_criteria: Option<Vec<String>> = args
        .get("acceptance_criteria")
        .and_then(|v| serde_json::from_value(v.clone()).ok());

    let root = ctx.state.get_project_root()?;
    let refactor_id =
        create_refactor_file(&root, name, description, acceptance_criteria.as_deref())?;

    Ok(format!("Created refactor: {refactor_id}"))
}

pub(super) fn tool_list_refactors(ctx: &AppContext) -> Result<String, String> {
    let root = ctx.state.get_project_root()?;
    let refactors = list_refactor_files(&root)?;
    serde_json::to_string_pretty(&json!(
        refactors
            .iter()
            .map(|(id, name)| json!({ "refactor_id": id, "name": name }))
            .collect::<Vec<_>>()
    ))
    .map_err(|e| format!("Serialization error: {e}"))
}

pub(super) fn parse_test_cases(value: Option<&Value>) -> Result<Vec<TestCaseResult>, String> {
    let arr = match value {
        Some(Value::Array(a)) => a,
        Some(Value::Null) | None => return Ok(Vec::new()),
        _ => return Err("Expected array for test cases".to_string()),
    };

    arr.iter()
        .map(|item| {
            let name = item
                .get("name")
                .and_then(|v| v.as_str())
                .ok_or("Test case missing 'name'")?
                .to_string();
            let status_str = item
                .get("status")
                .and_then(|v| v.as_str())
                .ok_or("Test case missing 'status'")?;
            let status = match status_str {
                "pass" => TestStatus::Pass,
                "fail" => TestStatus::Fail,
                other => {
                    return Err(format!(
                        "Invalid test status '{other}'. Use 'pass' or 'fail'."
                    ));
                }
            };
            let details = item
                .get("details")
                .and_then(|v| v.as_str())
                .map(String::from);
            Ok(TestCaseResult {
                name,
                status,
                details,
            })
        })
        .collect()
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::http::test_helpers::test_ctx;

    #[test]
    fn parse_test_cases_empty() {
        let result = parse_test_cases(None).unwrap();
        assert!(result.is_empty());
    }

    #[test]
    fn parse_test_cases_valid() {
        let input = json!([
            {"name": "test1", "status": "pass"},
            {"name": "test2", "status": "fail", "details": "assertion failed"}
        ]);
        let result = parse_test_cases(Some(&input)).unwrap();
        assert_eq!(result.len(), 2);
        assert_eq!(result[0].status, TestStatus::Pass);
        assert_eq!(result[1].status, TestStatus::Fail);
        assert_eq!(result[1].details, Some("assertion failed".to_string()));
    }

    #[test]
    fn parse_test_cases_invalid_status() {
        let input = json!([{"name": "t", "status": "maybe"}]);
        assert!(parse_test_cases(Some(&input)).is_err());
    }

    #[test]
    fn parse_test_cases_null_value_returns_empty() {
        let null_val = json!(null);
        let result = parse_test_cases(Some(&null_val)).unwrap();
        assert!(result.is_empty());
    }

    #[test]
    fn parse_test_cases_non_array_returns_error() {
        let obj = json!({"invalid": "input"});
        let result = parse_test_cases(Some(&obj));
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("Expected array"));
    }

    #[test]
    fn parse_test_cases_missing_name_returns_error() {
        let input = json!([{"status": "pass"}]);
        let result = parse_test_cases(Some(&input));
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("name"));
    }

    #[test]
    fn parse_test_cases_missing_status_returns_error() {
        let input = json!([{"name": "test1"}]);
        let result = parse_test_cases(Some(&input));
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("status"));
    }

    #[test]
    fn tool_validate_stories_empty_project() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_validate_stories(&ctx).unwrap();
        // CRDT is global; other tests may have inserted items.
        // Just verify it parses without error.
        let _parsed: Vec<Value> = serde_json::from_str(&result).unwrap();
    }

    #[test]
    fn tool_create_story_and_list_upcoming() {
        let tmp = tempfile::tempdir().unwrap();
        // No git repo needed: spike 61 — create_story just writes the file;
        // the filesystem watcher handles the commit asynchronously.
        let ctx = test_ctx(tmp.path());

        let result = tool_create_story(
            &json!({"name": "Test Story", "acceptance_criteria": ["AC1", "AC2"]}),
            &ctx,
        )
        .unwrap();
        assert!(result.contains("Created story:"));

        // List should return it (CRDT is global, so filter for our story)
        let list = tool_list_upcoming(&ctx).unwrap();
        let parsed: Vec<Value> = serde_json::from_str(&list).unwrap();
        assert!(
            parsed.iter().any(|s| s["name"] == "Test Story"),
            "expected 'Test Story' in upcoming list: {parsed:?}"
        );
    }

    #[test]
    fn tool_create_story_rejects_empty_name() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_story(&json!({"name": "!!!"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("alphanumeric"));
    }

    #[test]
    fn tool_create_story_missing_name() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_story(&json!({}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("Missing required argument"));
    }

    // Regression test for bug 509: description was silently dropped.
    #[test]
    fn tool_create_story_description_is_written_to_file() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());

        let result = tool_create_story(
            &json!({
                "name": "Story With Description",
                "description": "This is the background context."
            }),
            &ctx,
        )
        .unwrap();
        assert!(result.contains("Created story:"));

        let story_id = result
            .trim_start_matches("Created story: ")
            .trim()
            .to_string();
        let content = crate::db::read_content(&story_id).expect("story content should exist");
        assert!(
            content.contains("## Description"),
            "Description section missing from story: {content}"
        );
        assert!(
            content.contains("This is the background context."),
            "Description text missing from story: {content}"
        );
    }

    #[test]
    fn tool_get_pipeline_status_returns_structured_response() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        for (stage, id, name) in &[
            ("1_backlog", "9910_story_upcoming", "Upcoming Story"),
            ("2_current", "9920_story_current", "Current Story"),
            ("3_qa", "9930_story_qa", "QA Story"),
            ("4_merge", "9940_story_merge", "Merge Story"),
            ("5_done", "9950_story_done", "Done Story"),
        ] {
            crate::db::write_item_with_content(id, stage, &format!("---\nname: \"{name}\"\n---\n"));
        }

        let ctx = test_ctx(tmp.path());
        let result = tool_get_pipeline_status(&ctx).unwrap();
        let parsed: Value = serde_json::from_str(&result).unwrap();

        // Active stages include current, qa, merge, done
        let active = parsed["active"].as_array().unwrap();
        let stages: Vec<&str> = active
            .iter()
            .map(|i| i["stage"].as_str().unwrap())
            .collect();
        assert!(stages.contains(&"current"));
        assert!(stages.contains(&"qa"));
        assert!(stages.contains(&"merge"));
        assert!(stages.contains(&"done"));

        // Backlog should contain our item
        let backlog = parsed["backlog"].as_array().unwrap();
        assert!(
            backlog
                .iter()
                .any(|b| b["story_id"] == "9910_story_upcoming"),
            "expected 9910_story_upcoming in backlog: {backlog:?}"
        );
    }

    #[test]
    fn tool_get_pipeline_status_includes_agent_assignment() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9921_story_active",
            "2_current",
            "---\nname: \"Active Story\"\n---\n",
        );

        let ctx = test_ctx(tmp.path());
        ctx.agents.inject_test_agent(
            "9921_story_active",
            "coder-1",
            crate::agents::AgentStatus::Running,
        );

        let result = tool_get_pipeline_status(&ctx).unwrap();
        let parsed: Value = serde_json::from_str(&result).unwrap();

        let active = parsed["active"].as_array().unwrap();
        let item = active
            .iter()
            .find(|i| i["story_id"] == "9921_story_active")
            .expect("expected 9921_story_active in active items");
        assert_eq!(item["stage"], "current");
        assert!(!item["agent"].is_null(), "agent should be present");
        assert_eq!(item["agent"]["agent_name"], "coder-1");
        assert_eq!(item["agent"]["status"], "running");
    }

    #[test]
    fn tool_get_story_todos_missing_file() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_get_story_todos(&json!({"story_id": "99_nonexistent"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("not found"));
    }

    #[test]
    fn tool_get_story_todos_returns_unchecked() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9901_test",
            "2_current",
            "---\nname: Test\n---\n## AC\n- [ ] First\n- [x] Done\n- [ ] Second\n",
        );

        let ctx = test_ctx(tmp.path());
        let result = tool_get_story_todos(&json!({"story_id": "9901_test"}), &ctx).unwrap();
        let parsed: Value = serde_json::from_str(&result).unwrap();
        assert_eq!(parsed["todos"].as_array().unwrap().len(), 2);
        assert_eq!(parsed["story_name"], "Test");
    }

    #[test]
    fn tool_record_tests_and_ensure_acceptance() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());

        // Record passing tests
        let result = tool_record_tests(
            &json!({
                "story_id": "1_test",
                "unit": [{"name": "u1", "status": "pass"}],
                "integration": [{"name": "i1", "status": "pass"}]
            }),
            &ctx,
        )
        .unwrap();
        assert!(result.contains("recorded"));

        // Should be acceptable
        let result = tool_ensure_acceptance(&json!({"story_id": "1_test"}), &ctx).unwrap();
        assert!(result.contains("All gates pass"));
    }

    #[test]
    fn tool_ensure_acceptance_blocks_on_failures() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());

        tool_record_tests(
            &json!({
                "story_id": "1_test",
                "unit": [{"name": "u1", "status": "fail"}],
                "integration": []
            }),
            &ctx,
        )
        .unwrap();

        let result = tool_ensure_acceptance(&json!({"story_id": "1_test"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("blocked"));
    }

    fn setup_git_repo_in(dir: &std::path::Path) {
        std::process::Command::new("git")
            .args(["init"])
            .current_dir(dir)
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["config", "user.email", "test@test.com"])
            .current_dir(dir)
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["config", "user.name", "Test"])
            .current_dir(dir)
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["commit", "--allow-empty", "-m", "init"])
            .current_dir(dir)
            .output()
            .unwrap();
    }

    #[test]
    fn create_bug_in_tools_list() {
        use super::super::handle_tools_list;
        let resp = handle_tools_list(Some(json!(1)));
        let tools = resp.result.unwrap()["tools"].as_array().unwrap().clone();
        let tool = tools.iter().find(|t| t["name"] == "create_bug");
        assert!(tool.is_some(), "create_bug missing from tools list");
        let t = tool.unwrap();
        let desc = t["description"].as_str().unwrap();
        assert!(
            desc.contains("work/1_backlog/"),
            "create_bug description should reference work/1_backlog/, got: {desc}"
        );
        assert!(
            !desc.contains(".huskies/bugs"),
            "create_bug description should not reference nonexistent .huskies/bugs/, got: {desc}"
        );
        let required = t["inputSchema"]["required"].as_array().unwrap();
        let req_names: Vec<&str> = required.iter().map(|v| v.as_str().unwrap()).collect();
        assert!(req_names.contains(&"name"));
        assert!(req_names.contains(&"description"));
        assert!(req_names.contains(&"steps_to_reproduce"));
        assert!(req_names.contains(&"actual_result"));
        assert!(req_names.contains(&"expected_result"));
    }

    #[test]
    fn list_bugs_in_tools_list() {
        use super::super::handle_tools_list;
        let resp = handle_tools_list(Some(json!(1)));
        let tools = resp.result.unwrap()["tools"].as_array().unwrap().clone();
        let tool = tools.iter().find(|t| t["name"] == "list_bugs");
        assert!(tool.is_some(), "list_bugs missing from tools list");
        let t = tool.unwrap();
        let desc = t["description"].as_str().unwrap();
        assert!(
            desc.contains("work/1_backlog/"),
            "list_bugs description should reference work/1_backlog/, got: {desc}"
        );
        assert!(
            !desc.contains(".huskies/bugs"),
            "list_bugs description should not reference nonexistent .huskies/bugs/, got: {desc}"
        );
    }

    #[test]
    fn close_bug_in_tools_list() {
        use super::super::handle_tools_list;
        let resp = handle_tools_list(Some(json!(1)));
        let tools = resp.result.unwrap()["tools"].as_array().unwrap().clone();
        let tool = tools.iter().find(|t| t["name"] == "close_bug");
        assert!(tool.is_some(), "close_bug missing from tools list");
        let t = tool.unwrap();
        let desc = t["description"].as_str().unwrap();
        assert!(
            !desc.contains(".huskies/bugs"),
            "close_bug description should not reference nonexistent .huskies/bugs/, got: {desc}"
        );
        assert!(
            desc.contains("work/5_done/"),
            "close_bug description should reference work/5_done/, got: {desc}"
        );
        let required = t["inputSchema"]["required"].as_array().unwrap();
        let req_names: Vec<&str> = required.iter().map(|v| v.as_str().unwrap()).collect();
        assert!(req_names.contains(&"bug_id"));
    }

    #[test]
    fn tool_create_bug_missing_name() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "description": "d",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e"
            }),
            &ctx,
        );
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("name"));
    }

    #[test]
    fn tool_create_bug_missing_description() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "name": "Bug",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e"
            }),
            &ctx,
        );
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("description"));
    }

    #[test]
    fn tool_create_bug_creates_file_and_commits() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());
        let ctx = test_ctx(tmp.path());

        let result = tool_create_bug(
            &json!({
                "name": "Login Crash",
                "description": "The app crashes on login.",
                "steps_to_reproduce": "1. Open app\n2. Click login",
                "actual_result": "500 error",
                "expected_result": "Successful login"
            }),
            &ctx,
        )
        .unwrap();

        assert!(
            result.contains("_bug_login_crash"),
            "result should contain bug ID: {result}"
        );
        // Extract the actual bug ID from the result message (format: "Created bug: <id>").
        let bug_id = result.trim_start_matches("Created bug: ").trim();
        // Bug content should exist in the CRDT content store.
        assert!(
            crate::db::read_content(bug_id).is_some(),
            "expected bug content in CRDT for {bug_id}"
        );
    }

    #[test]
    fn tool_list_bugs_no_crash_on_empty_root() {
        // list_bugs reads from the global CRDT, not the filesystem.
        // Verify it returns valid JSON without panicking.
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_list_bugs(&ctx).unwrap();
        // Verify result is valid JSON array (may contain bugs from
        // the shared global CRDT populated by other tests).
        let _parsed: Vec<Value> = serde_json::from_str(&result).unwrap();
    }

    #[test]
    fn tool_list_bugs_returns_open_bugs() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9902_bug_crash",
            "1_backlog",
            "---\nname: \"App Crash\"\n---\n# Bug 9902: App Crash\n",
        );
        crate::db::write_item_with_content(
            "9903_bug_typo",
            "1_backlog",
            "---\nname: \"Typo in Header\"\n---\n# Bug 9903: Typo in Header\n",
        );

        let ctx = test_ctx(tmp.path());
        let result = tool_list_bugs(&ctx).unwrap();
        let parsed: Vec<Value> = serde_json::from_str(&result).unwrap();
        assert!(
            parsed
                .iter()
                .any(|b| b["bug_id"] == "9902_bug_crash" && b["name"] == "App Crash"),
            "expected 9902_bug_crash in bugs list: {parsed:?}"
        );
        assert!(
            parsed
                .iter()
                .any(|b| b["bug_id"] == "9903_bug_typo" && b["name"] == "Typo in Header"),
            "expected 9903_bug_typo in bugs list: {parsed:?}"
        );
    }

    #[test]
    fn tool_close_bug_missing_bug_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_close_bug(&json!({}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("bug_id"));
    }

    #[test]
    fn tool_close_bug_moves_to_archive() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());
        let backlog_dir = tmp.path().join(".huskies/work/1_backlog");
        std::fs::create_dir_all(&backlog_dir).unwrap();
        let bug_file = backlog_dir.join("9901_bug_crash.md");
        let content = "# Bug 9901: Crash\n";
        std::fs::write(&bug_file, content).unwrap();
        crate::db::ensure_content_store();
        crate::db::write_content("9901_bug_crash", content);
        // Stage the file so it's tracked
        std::process::Command::new("git")
            .args(["add", "."])
            .current_dir(tmp.path())
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["commit", "-m", "add bug"])
            .current_dir(tmp.path())
            .output()
            .unwrap();

        let ctx = test_ctx(tmp.path());
        let result = tool_close_bug(&json!({"bug_id": "9901_bug_crash"}), &ctx).unwrap();
        assert!(result.contains("9901_bug_crash"));
        assert!(
            crate::db::read_content("9901_bug_crash").is_some(),
            "content store should have the bug after close"
        );
    }

    #[test]
    fn create_spike_in_tools_list() {
        use super::super::handle_tools_list;
        let resp = handle_tools_list(Some(json!(1)));
        let tools = resp.result.unwrap()["tools"].as_array().unwrap().clone();
        let tool = tools.iter().find(|t| t["name"] == "create_spike");
        assert!(tool.is_some(), "create_spike missing from tools list");
        let t = tool.unwrap();
        assert!(t["description"].is_string());
        let required = t["inputSchema"]["required"].as_array().unwrap();
        let req_names: Vec<&str> = required.iter().map(|v| v.as_str().unwrap()).collect();
        assert!(req_names.contains(&"name"));
        // description is optional
        assert!(!req_names.contains(&"description"));
    }

    #[test]
    fn tool_create_spike_missing_name() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_spike(&json!({}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("name"));
    }

    #[test]
    fn tool_create_spike_rejects_empty_name() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_spike(&json!({"name": "!!!"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("alphanumeric"));
    }

    #[test]
    fn tool_create_spike_creates_file() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());

        let result = tool_create_spike(
            &json!({"name": "Compare Encoders", "description": "Which encoder is fastest?"}),
            &ctx,
        )
        .unwrap();

        assert!(
            result.contains("_spike_compare_encoders"),
            "result should contain spike ID: {result}"
        );
        // Extract the actual spike ID from the result message (format: "Created spike: <id>").
        let spike_id = result.trim_start_matches("Created spike: ").trim();
        // Spike content should exist in the CRDT content store.
        let contents = crate::db::read_content(spike_id).expect("expected spike content in CRDT");
        assert!(contents.starts_with("---\nname: \"Compare Encoders\"\n---"));
        assert!(contents.contains("Which encoder is fastest?"));
    }

    #[test]
    fn tool_create_spike_creates_file_without_description() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());

        let result = tool_create_spike(&json!({"name": "My Spike"}), &ctx).unwrap();
        assert!(
            result.contains("_spike_my_spike"),
            "result should contain spike ID: {result}"
        );
        // Extract the actual spike ID from the result message (format: "Created spike: <id>").
        let spike_id = result.trim_start_matches("Created spike: ").trim();

        // Spike content should exist in the CRDT content store.
        let contents = crate::db::read_content(spike_id).expect("expected spike content in CRDT");
        assert!(contents.starts_with("---\nname: \"My Spike\"\n---"));
        assert!(contents.contains("## Question\n\n- TBD\n"));
    }

    #[test]
    fn tool_record_tests_missing_story_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_record_tests(&json!({"unit": [], "integration": []}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("story_id"));
    }

    #[test]
    fn tool_record_tests_invalid_unit_type_returns_error() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_record_tests(
            &json!({
                "story_id": "1_test",
                "unit": "not_an_array",
                "integration": []
            }),
            &ctx,
        );
        assert!(result.is_err());
    }

    #[test]
    fn tool_ensure_acceptance_missing_story_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_ensure_acceptance(&json!({}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("story_id"));
    }

    #[test]
    fn tool_validate_stories_with_valid_story() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9907_test",
            "2_current",
            "---\nname: \"Valid Story\"\n---\n## AC\n- [ ] First\n",
        );

        let ctx = test_ctx(tmp.path());
        let result = tool_validate_stories(&ctx).unwrap();
        let parsed: Vec<Value> = serde_json::from_str(&result).unwrap();
        let item = parsed
            .iter()
            .find(|v| v["story_id"] == "9907_test")
            .expect("expected 9907_test in validation results");
        assert_eq!(item["valid"], true);
    }

    #[test]
    fn tool_validate_stories_with_invalid_front_matter() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content("9908_test", "2_current", "## No front matter at all\n");

        let ctx = test_ctx(tmp.path());
        let result = tool_validate_stories(&ctx).unwrap();
        let parsed: Vec<Value> = serde_json::from_str(&result).unwrap();
        let item = parsed
            .iter()
            .find(|v| v["story_id"] == "9908_test")
            .expect("expected 9908_test in validation results");
        assert_eq!(item["valid"], false);
    }

    #[test]
    fn record_tests_persists_to_story_file() {
        let tmp = tempfile::tempdir().unwrap();

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9906_story_persist",
            "2_current",
            "---\nname: Persist\n---\n# Story\n",
        );

        let ctx = test_ctx(tmp.path());
        tool_record_tests(
            &json!({
                "story_id": "9906_story_persist",
                "unit": [{"name": "u1", "status": "pass"}],
                "integration": []
            }),
            &ctx,
        )
        .unwrap();

        let contents = crate::db::read_content("9906_story_persist")
            .expect("story content should exist in CRDT");
        assert!(
            contents.contains("## Test Results"),
            "content should have Test Results section"
        );
        assert!(
            contents.contains("huskies-test-results:"),
            "content should have JSON marker"
        );
        assert!(contents.contains("u1"), "content should contain test name");
    }

    #[test]
    fn ensure_acceptance_reads_from_file_when_not_in_memory() {
        let tmp = tempfile::tempdir().unwrap();

        // Write story content to CRDT with a pre-populated Test Results section
        let story_content = "---\nname: Persist\n---\n# Story\n\n## Test Results\n\n<!-- huskies-test-results: {\"unit\":[{\"name\":\"u1\",\"status\":\"pass\",\"details\":null}],\"integration\":[{\"name\":\"i1\",\"status\":\"pass\",\"details\":null}]} -->\n";
        crate::db::ensure_content_store();
        crate::db::write_item_with_content("9905_story_file_only", "2_current", story_content);

        let ctx = test_ctx(tmp.path());

        // ensure_acceptance should read from content store and succeed
        let result = tool_ensure_acceptance(&json!({"story_id": "9905_story_file_only"}), &ctx);
        assert!(
            result.is_ok(),
            "should accept based on content store data, got: {:?}",
            result
        );
        assert!(result.unwrap().contains("All gates pass"));
    }

    #[test]
    fn ensure_acceptance_file_with_failures_still_blocks() {
        let tmp = tempfile::tempdir().unwrap();
        let current = tmp.path().join(".huskies/work/2_current");
        fs::create_dir_all(&current).unwrap();

        let story_content = "---\nname: Fail\n---\n# Story\n\n## Test Results\n\n<!-- huskies-test-results: {\"unit\":[{\"name\":\"u1\",\"status\":\"fail\",\"details\":\"error\"}],\"integration\":[]} -->\n";
        fs::write(current.join("3_story_fail.md"), story_content).unwrap();

        let ctx = test_ctx(tmp.path());
        let result = tool_ensure_acceptance(&json!({"story_id": "3_story_fail"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("blocked"));
    }

    #[tokio::test]
    async fn tool_delete_story_missing_story_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_delete_story(&json!({}), &ctx).await;
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("story_id"));
    }

    #[tokio::test]
    async fn tool_delete_story_not_found_returns_error() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_delete_story(&json!({"story_id": "99_nonexistent"}), &ctx).await;
        assert!(result.is_err());
        assert!(
            result
                .unwrap_err()
                .contains("not found in any pipeline stage")
        );
    }

    #[tokio::test]
    async fn tool_delete_story_deletes_file_from_backlog() {
        let tmp = tempfile::tempdir().unwrap();
        let backlog = tmp.path().join(".huskies/work/1_backlog");
        fs::create_dir_all(&backlog).unwrap();
        let story_file = backlog.join("10_story_cleanup.md");
        fs::write(&story_file, "---\nname: Cleanup\n---\n").unwrap();

        let ctx = test_ctx(tmp.path());
        let result = tool_delete_story(&json!({"story_id": "10_story_cleanup"}), &ctx).await;
        assert!(result.is_ok(), "expected ok: {result:?}");
        assert!(!story_file.exists(), "story file should be deleted");
    }

    #[tokio::test]
    async fn tool_delete_story_deletes_file_from_current() {
        let tmp = tempfile::tempdir().unwrap();
        let current = tmp.path().join(".huskies/work/2_current");
        fs::create_dir_all(&current).unwrap();
        let story_file = current.join("11_story_active.md");
        fs::write(&story_file, "---\nname: Active\n---\n").unwrap();

        let ctx = test_ctx(tmp.path());
        let result = tool_delete_story(&json!({"story_id": "11_story_active"}), &ctx).await;
        assert!(result.is_ok(), "expected ok: {result:?}");
        assert!(!story_file.exists(), "story file should be deleted");
    }

    #[test]
    fn tool_accept_story_missing_story_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_accept_story(&json!({}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("story_id"));
    }

    #[test]
    fn tool_accept_story_nonexistent_story_returns_error() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());
        let ctx = test_ctx(tmp.path());
        // No story file in current/ — should fail
        let result = tool_accept_story(&json!({"story_id": "99_nonexistent"}), &ctx);
        assert!(result.is_err());
    }

    /// Bug 226: accept_story must refuse when the feature branch has unmerged code.
    #[test]
    fn tool_accept_story_refuses_when_feature_branch_has_unmerged_code() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());

        // Create a feature branch with code changes.
        std::process::Command::new("git")
            .args(["checkout", "-b", "feature/story-50_story_test"])
            .current_dir(tmp.path())
            .output()
            .unwrap();
        std::fs::write(tmp.path().join("feature.rs"), "fn main() {}").unwrap();
        std::process::Command::new("git")
            .args(["add", "."])
            .current_dir(tmp.path())
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["commit", "-m", "add feature"])
            .current_dir(tmp.path())
            .output()
            .unwrap();
        std::process::Command::new("git")
            .args(["checkout", "master"])
            .current_dir(tmp.path())
            .output()
            .unwrap();

        // Create story file in current/ so move_story_to_done would work.
        let current_dir = tmp.path().join(".huskies/work/2_current");
        std::fs::create_dir_all(&current_dir).unwrap();
        std::fs::write(
            current_dir.join("50_story_test.md"),
            "---\nname: Test\n---\n",
        )
        .unwrap();

        let ctx = test_ctx(tmp.path());
        let result = tool_accept_story(&json!({"story_id": "50_story_test"}), &ctx);
        assert!(
            result.is_err(),
            "should refuse when feature branch has unmerged code"
        );
        let err = result.unwrap_err();
        assert!(
            err.contains("unmerged"),
            "error should mention unmerged changes: {err}"
        );
    }

    /// Bug 226: accept_story succeeds when no feature branch exists (e.g. manual stories).
    #[test]
    fn tool_accept_story_succeeds_when_no_feature_branch() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());

        // Create story file in current/ (no feature branch).
        let current_dir = tmp.path().join(".huskies/work/2_current");
        std::fs::create_dir_all(&current_dir).unwrap();
        let content = "---\nname: No Branch\n---\n";
        std::fs::write(current_dir.join("51_story_no_branch.md"), content).unwrap();
        crate::db::ensure_content_store();
        crate::db::write_content("51_story_no_branch", content);

        let ctx = test_ctx(tmp.path());
        let result = tool_accept_story(&json!({"story_id": "51_story_no_branch"}), &ctx);
        assert!(
            result.is_ok(),
            "should succeed when no feature branch: {result:?}"
        );
    }

    // ── tool_update_story non-string front matter tests ───────────────────────

    fn setup_story_for_update(dir: &std::path::Path, story_id: &str, content: &str) {
        let current = dir.join(".huskies/work/2_current");
        fs::create_dir_all(&current).unwrap();
        fs::write(current.join(format!("{story_id}.md")), content).unwrap();
        crate::db::ensure_content_store();
        crate::db::write_content(story_id, content);
    }

    #[test]
    fn tool_update_story_front_matter_json_bool_written_unquoted() {
        let tmp = tempfile::tempdir().unwrap();
        setup_story_for_update(
            tmp.path(),
            "504_bool_test",
            "---\nname: Bool Test\n---\n\nNo sections.\n",
        );
        let ctx = test_ctx(tmp.path());

        let result = tool_update_story(
            &json!({"story_id": "504_bool_test", "front_matter": {"blocked": false}}),
            &ctx,
        );
        assert!(result.is_ok(), "Expected ok: {result:?}");

        let content = crate::db::read_content("504_bool_test").unwrap();
        assert!(
            content.contains("blocked: false"),
            "bool should be unquoted: {content}"
        );
        assert!(
            !content.contains("blocked: \"false\""),
            "bool must not be quoted: {content}"
        );
    }

    #[test]
    fn tool_update_story_front_matter_json_number_written_unquoted() {
        let tmp = tempfile::tempdir().unwrap();
        setup_story_for_update(
            tmp.path(),
            "504_num_test",
            "---\nname: Num Test\n---\n\nNo sections.\n",
        );
        let ctx = test_ctx(tmp.path());

        let result = tool_update_story(
            &json!({"story_id": "504_num_test", "front_matter": {"retry_count": 3}}),
            &ctx,
        );
        assert!(result.is_ok(), "Expected ok: {result:?}");

        let content = crate::db::read_content("504_num_test").unwrap();
        assert!(
            content.contains("retry_count: 3"),
            "number should be unquoted: {content}"
        );
        assert!(
            !content.contains("retry_count: \"3\""),
            "number must not be quoted: {content}"
        );
    }

    #[test]
    fn tool_update_story_front_matter_json_array_written_as_yaml_sequence() {
        let tmp = tempfile::tempdir().unwrap();
        setup_story_for_update(
            tmp.path(),
            "504_arr_test",
            "---\nname: Array Test\n---\n\nNo sections.\n",
        );
        let ctx = test_ctx(tmp.path());

        let result = tool_update_story(
            &json!({"story_id": "504_arr_test", "front_matter": {"depends_on": [490, 491]}}),
            &ctx,
        );
        assert!(result.is_ok(), "Expected ok: {result:?}");

        let content = crate::db::read_content("504_arr_test").unwrap();
        // YAML inline sequences use spaces after commas
        assert!(
            content.contains("depends_on: [490, 491]"),
            "array should be unquoted YAML: {content}"
        );
        assert!(
            !content.contains("depends_on: \""),
            "array must not be quoted: {content}"
        );

        // The YAML must be parseable as a vec
        let meta = crate::io::story_metadata::parse_front_matter(&content)
            .expect("front matter should parse");
        assert_eq!(meta.depends_on, Some(vec![490, 491]));
    }

    #[test]
    fn tool_check_criterion_missing_story_id() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_check_criterion(&json!({"criterion_index": 0}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("story_id"));
    }

    #[test]
    fn tool_check_criterion_missing_criterion_index() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_check_criterion(&json!({"story_id": "1_test"}), &ctx);
        assert!(result.is_err());
        assert!(result.unwrap_err().contains("criterion_index"));
    }

    #[test]
    fn tool_check_criterion_marks_unchecked_item() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());

        crate::db::ensure_content_store();
        crate::db::write_item_with_content(
            "9904_test",
            "2_current",
            "---\nname: Test\n---\n## AC\n- [ ] First criterion\n- [x] Already done\n",
        );

        let ctx = test_ctx(tmp.path());
        let result = tool_check_criterion(
            &json!({"story_id": "9904_test", "criterion_index": 0}),
            &ctx,
        );
        assert!(result.is_ok(), "Expected ok: {result:?}");
        assert!(result.unwrap().contains("Criterion 0 checked"));
    }

    /// Regression test for bug 514: deleting a story must cancel its pending
    /// rate-limit retry timer so the tick loop cannot re-spawn an agent.
    ///
    /// Repro (2026-04-09): `delete_story 478_…` returned success and removed
    /// the filesystem shadow, but the timer entry in `.huskies/timers.json`
    /// survived.  Five minutes later the tick loop fired and re-spawned
    /// `coder-1` on the deleted story.
    #[tokio::test]
    async fn delete_story_cancels_pending_timer() {
        use chrono::Utc;

        let tmp = tempfile::tempdir().unwrap();
        let root = tmp.path();

        // Create a story file in the backlog.
        let backlog = root.join(".huskies/work/1_backlog");
        fs::create_dir_all(&backlog).unwrap();
        fs::write(
            backlog.join("478_story_rate_limit_repro.md"),
            "---\nname: \"Rate Limit Repro\"\n---\n",
        )
        .unwrap();

        let ctx = test_ctx(root);

        // Schedule a rate-limit retry timer for the story (simulates the
        // auto-scheduler that fires after a rate-limit event).
        let future_time = Utc::now() + chrono::Duration::minutes(5);
        ctx.timer_store
            .add("478_story_rate_limit_repro".to_string(), future_time)
            .unwrap();

        // Sanity: timer is present before deletion.
        assert_eq!(ctx.timer_store.list().len(), 1);

        // Delete the story.
        let result =
            tool_delete_story(&json!({"story_id": "478_story_rate_limit_repro"}), &ctx).await;
        assert!(result.is_ok(), "delete_story failed: {result:?}");

        // Timer must be gone — fast-forwarding past the scheduled time should
        // return no entries.
        assert!(
            ctx.timer_store.list().is_empty(),
            "timer was not cancelled by delete_story"
        );
        let far_future = Utc::now() + chrono::Duration::hours(1);
        let due = ctx.timer_store.take_due(far_future);
        assert!(
            due.is_empty(),
            "take_due returned a timer for the deleted story: {due:?}"
        );

        // Filesystem shadow must also be gone.
        assert!(
            !backlog.join("478_story_rate_limit_repro.md").exists(),
            "filesystem shadow was not removed"
        );
    }
}