//! Bug item MCP tools (create, list, close).

#![allow(unused_imports, dead_code)]
#[allow(unused_imports)]
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, edit_criterion_in_file, list_bug_files,
    list_refactor_files, load_pipeline_state, load_upcoming_stories, remove_criterion_from_file,
    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::service::story::parse_test_cases;
use crate::slog_warn;
#[allow(unused_imports)]
use crate::workflow::{TestCaseResult, TestStatus, evaluate_acceptance_with_coverage};
use serde_json::{Value, json};
use std::collections::HashMap;
use std::fs;

pub(crate) 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: Vec<String> = args
        .get("acceptance_criteria")
        .and_then(|v| serde_json::from_value(v.clone()).ok())
        .ok_or("Missing required argument: acceptance_criteria")?;
    if acceptance_criteria.is_empty() {
        return Err("acceptance_criteria must contain at least one entry".to_string());
    }
    const JUNK_AC: &[&str] = &["", "todo", "tbd", "fixme", "xxx", "???"];
    let all_junk = acceptance_criteria
        .iter()
        .all(|ac| JUNK_AC.contains(&ac.trim().to_lowercase().as_str()));
    if all_junk {
        return Err(
            "acceptance_criteria must contain at least one real entry (not just TODO/TBD/FIXME/XXX/???)."
                .to_string(),
        );
    }
    let depends_on: Option<Vec<u32>> = args
        .get("depends_on")
        .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,
        Some(&acceptance_criteria),
        depends_on.as_deref(),
    )?;

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

pub(crate) 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(crate) 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.services.agents.get_project_root(&ctx.state)?;
    close_bug_to_archive(&root, bug_id)?;
    ctx.services.agents.remove_agents_for_story(bug_id);

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

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

    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();
    }

    use super::super::super::tools_list::handle_tools_list;
    use serde_json::Value;

    #[test]
    fn create_bug_in_tools_list() {
        use super::super::super::tools_list::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::super::tools_list::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::super::tools_list::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",
                "acceptance_criteria": ["Login succeeds without error"]
            }),
            &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_create_bug_rejects_missing_acceptance_criteria() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "name": "Some Bug",
                "description": "d",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e"
            }),
            &ctx,
        );
        assert!(result.is_err());
        assert!(
            result.unwrap_err().contains("acceptance_criteria"),
            "error should mention acceptance_criteria"
        );
    }

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

    #[test]
    fn tool_create_bug_accepts_single_criterion() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "name": "Single Criterion Bug",
                "description": "d",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e",
                "acceptance_criteria": ["Bug is fixed"]
            }),
            &ctx,
        );
        assert!(result.is_ok(), "expected ok: {result:?}");
        assert!(result.unwrap().contains("Created bug:"));
    }

    #[test]
    fn tool_create_bug_rejects_all_junk_acceptance_criteria() {
        let tmp = tempfile::tempdir().unwrap();
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "name": "Junk Bug",
                "description": "d",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e",
                "acceptance_criteria": ["TODO", "TBD"]
            }),
            &ctx,
        );
        assert!(result.is_err());
        assert!(
            result.unwrap_err().contains("real entry"),
            "error should mention real entry"
        );
    }

    #[test]
    fn tool_create_bug_accepts_mixed_junk_and_real_acceptance_criteria() {
        let tmp = tempfile::tempdir().unwrap();
        setup_git_repo_in(tmp.path());
        let ctx = test_ctx(tmp.path());
        let result = tool_create_bug(
            &json!({
                "name": "Mixed Bug",
                "description": "d",
                "steps_to_reproduce": "s",
                "actual_result": "a",
                "expected_result": "e",
                "acceptance_criteria": ["TODO", "Real AC"]
            }),
            &ctx,
        );
        assert!(result.is_ok(), "expected ok for mixed AC: {result:?}");
        assert!(result.unwrap().contains("Created bug:"));
    }

    #[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"
        );
    }
}