//! Project scaffolding — creates the `.huskies/` directory structure and default files.

use std::fs;
use std::path::Path;

mod detect;
mod helpers;
mod templates;

use detect::{detect_components_toml, detect_script_build, detect_script_lint, detect_script_test};
use helpers::{
    append_root_gitignore_entries, generate_project_toml, write_file_if_missing,
    write_script_if_missing, write_story_kit_gitignore,
};
use templates::{
    BOT_TOML_MATRIX_EXAMPLE, BOT_TOML_SLACK_EXAMPLE, BOT_TOML_WHATSAPP_META_EXAMPLE,
    BOT_TOML_WHATSAPP_TWILIO_EXAMPLE, DEFAULT_AGENTS_TOML, STORY_KIT_CLAUDE_MD,
    STORY_KIT_CLAUDE_SETTINGS, STORY_KIT_CONTEXT, STORY_KIT_README, STORY_KIT_SCRIPT_TEST,
    STORY_KIT_STACK,
};

pub(crate) fn scaffold_story_kit(root: &Path, port: u16) -> Result<(), String> {
    let story_kit_root = root.join(".huskies");
    let specs_root = story_kit_root.join("specs");
    let tech_root = specs_root.join("tech");
    let functional_root = specs_root.join("functional");
    let script_root = root.join("script");

    // Create the work/ pipeline directories, each with a .gitkeep so empty dirs survive git clone
    let work_stages = [
        "1_backlog",
        "2_current",
        "3_qa",
        "4_merge",
        "5_done",
        "6_archived",
    ];
    for stage in &work_stages {
        let dir = story_kit_root.join("work").join(stage);
        fs::create_dir_all(&dir).map_err(|e| format!("Failed to create work/{}: {}", stage, e))?;
        write_file_if_missing(&dir.join(".gitkeep"), "")?;
    }

    fs::create_dir_all(&tech_root).map_err(|e| format!("Failed to create specs/tech: {}", e))?;
    fs::create_dir_all(&functional_root)
        .map_err(|e| format!("Failed to create specs/functional: {}", e))?;
    fs::create_dir_all(&script_root)
        .map_err(|e| format!("Failed to create script/ directory: {}", e))?;

    write_file_if_missing(&story_kit_root.join("README.md"), STORY_KIT_README)?;
    let project_toml_content = generate_project_toml(root);
    write_file_if_missing(&story_kit_root.join("project.toml"), &project_toml_content)?;
    write_file_if_missing(&story_kit_root.join("agents.toml"), DEFAULT_AGENTS_TOML)?;
    write_file_if_missing(&specs_root.join("00_CONTEXT.md"), STORY_KIT_CONTEXT)?;
    write_file_if_missing(&tech_root.join("STACK.md"), STORY_KIT_STACK)?;
    let script_test_content = detect_script_test(root);
    write_script_if_missing(&script_root.join("test"), &script_test_content)?;
    let script_build_content = detect_script_build(root);
    write_script_if_missing(&script_root.join("build"), &script_build_content)?;
    let script_lint_content = detect_script_lint(root);
    write_script_if_missing(&script_root.join("lint"), &script_lint_content)?;
    write_file_if_missing(&root.join("CLAUDE.md"), STORY_KIT_CLAUDE_MD)?;

    // Write per-transport bot.toml example files so users can see all options.
    write_file_if_missing(
        &story_kit_root.join("bot.toml.matrix.example"),
        BOT_TOML_MATRIX_EXAMPLE,
    )?;
    write_file_if_missing(
        &story_kit_root.join("bot.toml.whatsapp-meta.example"),
        BOT_TOML_WHATSAPP_META_EXAMPLE,
    )?;
    write_file_if_missing(
        &story_kit_root.join("bot.toml.whatsapp-twilio.example"),
        BOT_TOML_WHATSAPP_TWILIO_EXAMPLE,
    )?;
    write_file_if_missing(
        &story_kit_root.join("bot.toml.slack.example"),
        BOT_TOML_SLACK_EXAMPLE,
    )?;

    // Write .mcp.json at the project root so agents can find the MCP server.
    // Only written when missing — never overwrites an existing file, because
    // the port is environment-specific and must not clobber a running instance.
    let mcp_content = format!(
        "{{\n  \"mcpServers\": {{\n    \"huskies\": {{\n      \"type\": \"http\",\n      \"url\": \"http://localhost:{port}/mcp\"\n    }}\n  }}\n}}\n"
    );
    write_file_if_missing(&root.join(".mcp.json"), &mcp_content)?;

    // Create .claude/settings.json with sensible permission defaults so that
    // Claude Code (both agents and web UI chat) can operate without constant
    // permission prompts.
    let claude_dir = root.join(".claude");
    fs::create_dir_all(&claude_dir)
        .map_err(|e| format!("Failed to create .claude/ directory: {}", e))?;
    write_file_if_missing(&claude_dir.join("settings.json"), STORY_KIT_CLAUDE_SETTINGS)?;

    write_story_kit_gitignore(root)?;
    append_root_gitignore_entries(root)?;

    // Run `git init` if the directory is not already a git repo, then make an initial commit
    if !root.join(".git").exists() {
        let init_status = std::process::Command::new("git")
            .args(["init"])
            .current_dir(root)
            .status()
            .map_err(|e| format!("Failed to run git init: {}", e))?;
        if !init_status.success() {
            return Err("git init failed".to_string());
        }

        let add_output = std::process::Command::new("git")
            .args([
                "add",
                ".huskies",
                "script",
                ".gitignore",
                "CLAUDE.md",
                ".claude",
            ])
            .current_dir(root)
            .output()
            .map_err(|e| format!("Failed to run git add: {}", e))?;
        if !add_output.status.success() {
            return Err(format!(
                "git add failed: {}",
                String::from_utf8_lossy(&add_output.stderr)
            ));
        }

        let commit_output = std::process::Command::new("git")
            .args([
                "-c",
                "user.email=huskies@localhost",
                "-c",
                "user.name=Story Kit",
                "commit",
                "-m",
                "Initial Story Kit scaffold",
            ])
            .current_dir(root)
            .output()
            .map_err(|e| format!("Failed to run git commit: {}", e))?;
        if !commit_output.status.success() {
            return Err(format!(
                "git commit failed: {}",
                String::from_utf8_lossy(&commit_output.stderr)
            ));
        }
    }

    Ok(())
}


#[cfg(test)]
mod tests {
    use super::*;
    use tempfile::tempdir;

    #[test]
    fn scaffold_story_kit_creates_structure() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert!(dir.path().join(".huskies/README.md").exists());
        assert!(dir.path().join(".huskies/project.toml").exists());
        assert!(dir.path().join(".huskies/agents.toml").exists());
        assert!(dir.path().join(".huskies/specs/00_CONTEXT.md").exists());
        assert!(dir.path().join(".huskies/specs/tech/STACK.md").exists());
        // Old stories/ dirs should NOT be created
        assert!(!dir.path().join(".huskies/stories").exists());
        assert!(dir.path().join("script/test").exists());
    }

    #[test]
    fn scaffold_story_kit_creates_work_pipeline_dirs() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let stages = [
            "1_backlog",
            "2_current",
            "3_qa",
            "4_merge",
            "5_done",
            "6_archived",
        ];
        for stage in &stages {
            let path = dir.path().join(".huskies/work").join(stage);
            assert!(path.is_dir(), "work/{} should be a directory", stage);
            assert!(
                path.join(".gitkeep").exists(),
                "work/{} should have a .gitkeep file",
                stage
            );
        }
    }

    #[test]
    fn scaffold_story_kit_agents_toml_has_coder_qa_mergemaster() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        // Agent definitions go into agents.toml, not project.toml.
        let agents = fs::read_to_string(dir.path().join(".huskies/agents.toml")).unwrap();
        assert!(agents.contains("[[agent]]"));
        assert!(agents.contains("stage = \"coder\""));
        assert!(agents.contains("stage = \"qa\""));
        assert!(agents.contains("stage = \"mergemaster\""));
        assert!(agents.contains("model = \"sonnet\""));

        // project.toml should NOT contain [[agent]] blocks.
        let project = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(!project.contains("[[agent]]"));
    }

    #[test]
    fn scaffold_project_toml_contains_rate_limit_and_timezone_comments() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(
            content.contains("rate_limit_notifications"),
            "project.toml scaffold should document rate_limit_notifications"
        );
        assert!(
            content.contains("timezone"),
            "project.toml scaffold should document timezone"
        );
    }

    #[test]
    fn scaffold_project_toml_contains_max_retries_with_default_value() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(
            content.contains("max_retries = 2"),
            "project.toml scaffold should include max_retries with default value 2"
        );
        assert!(
            content.contains("Maximum number of retries"),
            "project.toml scaffold should include a comment explaining max_retries"
        );
    }

    #[test]
    fn scaffold_project_toml_contains_commented_out_optional_fields() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(
            content.contains("# default_coder_model"),
            "project.toml scaffold should include commented-out default_coder_model"
        );
        assert!(
            content.contains("# max_coders"),
            "project.toml scaffold should include commented-out max_coders"
        );
        assert!(
            content.contains("# base_branch"),
            "project.toml scaffold should include commented-out base_branch"
        );
    }

    #[test]
    fn scaffold_project_toml_round_trips_through_project_config_load() {
        use crate::config::ProjectConfig;

        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        // The generated project.toml must parse without error.
        let config = ProjectConfig::load(dir.path())
            .expect("Generated project.toml should parse without error");

        // Key defaults must survive the round-trip.
        assert_eq!(config.default_qa, "server");
        assert_eq!(config.max_retries, 2);
        assert!(
            config.rate_limit_notifications,
            "rate_limit_notifications should default to true"
        );
        assert!(
            config.default_coder_model.is_none(),
            "default_coder_model should be None when commented out"
        );
        assert!(
            config.max_coders.is_none(),
            "max_coders should be None when commented out"
        );
        assert!(
            config.base_branch.is_none(),
            "base_branch should be None when commented out"
        );
        assert!(
            config.timezone.is_none(),
            "timezone should be None when commented out"
        );
    }

    #[test]
    fn scaffold_context_is_blank_template_not_story_kit_content() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/specs/00_CONTEXT.md")).unwrap();
        assert!(content.contains("<!-- huskies:scaffold-template -->"));
        assert!(content.contains("## High-Level Goal"));
        assert!(content.contains("## Core Features"));
        assert!(content.contains("## Domain Definition"));
        assert!(content.contains("## Glossary"));
        // Must NOT contain Story Kit-specific content
        assert!(!content.contains("Agentic AI Code Assistant"));
        assert!(!content.contains("Poem HTTP server"));
    }

    #[test]
    fn scaffold_stack_is_blank_template_not_story_kit_content() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/specs/tech/STACK.md")).unwrap();
        assert!(content.contains("<!-- huskies:scaffold-template -->"));
        assert!(content.contains("## Core Stack"));
        assert!(content.contains("## Coding Standards"));
        assert!(content.contains("## Quality Gates"));
        assert!(content.contains("## Libraries"));
        // Must NOT contain Story Kit-specific content
        assert!(!content.contains("Poem HTTP server"));
        assert!(!content.contains("TypeScript + React"));
    }

    #[test]
    fn scaffold_story_kit_creates_executable_script_test() {
        use std::os::unix::fs::PermissionsExt;

        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let script_test = dir.path().join("script/test");
        assert!(script_test.exists(), "script/test should be created");
        let perms = fs::metadata(&script_test).unwrap().permissions();
        assert!(
            perms.mode() & 0o111 != 0,
            "script/test should be executable"
        );
    }

    #[test]
    fn scaffold_story_kit_does_not_overwrite_existing() {
        let dir = tempdir().unwrap();
        let readme = dir.path().join(".huskies/README.md");
        fs::create_dir_all(readme.parent().unwrap()).unwrap();
        fs::write(&readme, "custom content").unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert_eq!(fs::read_to_string(&readme).unwrap(), "custom content");
    }

    #[test]
    fn scaffold_story_kit_is_idempotent() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let readme_content = fs::read_to_string(dir.path().join(".huskies/README.md")).unwrap();
        let toml_content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();

        // Run again — must not change content or add duplicate .gitignore entries
        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert_eq!(
            fs::read_to_string(dir.path().join(".huskies/README.md")).unwrap(),
            readme_content
        );
        assert_eq!(
            fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap(),
            toml_content
        );

        let story_kit_gitignore =
            fs::read_to_string(dir.path().join(".huskies/.gitignore")).unwrap();
        let count = story_kit_gitignore
            .lines()
            .filter(|l| l.trim() == "worktrees/")
            .count();
        assert_eq!(
            count, 1,
            ".huskies/.gitignore should not have duplicate entries"
        );
    }

    #[test]
    fn scaffold_story_kit_existing_git_repo_no_commit() {
        let dir = tempdir().unwrap();

        // Initialize a git repo before scaffold
        std::process::Command::new("git")
            .args(["init"])
            .current_dir(dir.path())
            .status()
            .unwrap();
        std::process::Command::new("git")
            .args([
                "-c",
                "user.email=test@test.com",
                "-c",
                "user.name=Test",
                "commit",
                "--allow-empty",
                "-m",
                "pre-scaffold",
            ])
            .current_dir(dir.path())
            .status()
            .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        // Only 1 commit should exist — scaffold must not commit into an existing repo
        let log_output = std::process::Command::new("git")
            .args(["log", "--oneline"])
            .current_dir(dir.path())
            .output()
            .unwrap();
        let log = String::from_utf8_lossy(&log_output.stdout);
        let commit_count = log.lines().count();
        assert_eq!(
            commit_count, 1,
            "scaffold should not create a commit in an existing git repo"
        );
    }

    #[test]
    fn scaffold_creates_story_kit_gitignore_with_relative_entries() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        // .huskies/.gitignore must contain relative patterns for files under .huskies/
        let sk_content = fs::read_to_string(dir.path().join(".huskies/.gitignore")).unwrap();
        assert!(sk_content.contains("worktrees/"));
        assert!(sk_content.contains("merge_workspace/"));
        assert!(sk_content.contains("coverage/"));
        assert!(sk_content.contains("matrix_history.json"));
        assert!(sk_content.contains("timers.json"));
        // Must NOT contain absolute .huskies/ prefixed paths
        assert!(!sk_content.contains(".huskies/"));

        // Root .gitignore must contain root-level huskies entries
        let root_content = fs::read_to_string(dir.path().join(".gitignore")).unwrap();
        assert!(root_content.contains(".huskies_port"));
        // store.json now lives inside .huskies/ and must NOT appear in root .gitignore
        assert!(!root_content.contains("store.json"));
        // Root .gitignore must NOT contain .huskies/ sub-directory patterns
        assert!(!root_content.contains(".huskies/worktrees/"));
        assert!(!root_content.contains(".huskies/merge_workspace/"));
        assert!(!root_content.contains(".huskies/coverage/"));
        // store.json must be in .huskies/.gitignore instead
        assert!(sk_content.contains("store.json"));
        // Database files must be ignored so novice users don't accidentally commit them
        assert!(sk_content.contains("pipeline.db"));
        assert!(sk_content.contains("*.db"));
    }

    #[test]
    fn scaffold_story_kit_gitignore_does_not_duplicate_existing_entries() {
        let dir = tempdir().unwrap();
        // Pre-create .huskies dir and .gitignore with some entries already present
        fs::create_dir_all(dir.path().join(".huskies")).unwrap();
        fs::write(
            dir.path().join(".huskies/.gitignore"),
            "worktrees/\ncoverage/\n",
        )
        .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/.gitignore")).unwrap();
        let worktrees_count = content.lines().filter(|l| l.trim() == "worktrees/").count();
        assert_eq!(worktrees_count, 1, "worktrees/ should not be duplicated");
        let coverage_count = content.lines().filter(|l| l.trim() == "coverage/").count();
        assert_eq!(coverage_count, 1, "coverage/ should not be duplicated");
        // The missing entry must have been added
        assert!(content.contains("merge_workspace/"));
    }

    #[test]
    fn scaffold_creates_claude_md_at_project_root() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let claude_md = dir.path().join("CLAUDE.md");
        assert!(
            claude_md.exists(),
            "CLAUDE.md should be created at project root"
        );

        let content = fs::read_to_string(&claude_md).unwrap();
        assert!(
            content.contains("<!-- huskies:scaffold-template -->"),
            "CLAUDE.md should contain the scaffold sentinel"
        );
        assert!(
            content.contains("Read .huskies/README.md"),
            "CLAUDE.md should include directive to read .huskies/README.md"
        );
        assert!(
            content.contains("Never chain shell commands"),
            "CLAUDE.md should include command chaining rule"
        );
        assert!(
            content.contains("wizard_status"),
            "CLAUDE.md should instruct Claude to call wizard_status on first conversation"
        );
    }

    #[test]
    fn scaffold_does_not_overwrite_existing_claude_md() {
        let dir = tempdir().unwrap();
        let claude_md = dir.path().join("CLAUDE.md");
        fs::write(&claude_md, "custom CLAUDE.md content").unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert_eq!(
            fs::read_to_string(&claude_md).unwrap(),
            "custom CLAUDE.md content",
            "scaffold should not overwrite an existing CLAUDE.md"
        );
    }

    #[test]
    fn scaffold_story_kit_writes_mcp_json_with_port() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 4242).unwrap();

        let mcp_path = dir.path().join(".mcp.json");
        assert!(mcp_path.exists(), ".mcp.json should be created by scaffold");
        let content = fs::read_to_string(&mcp_path).unwrap();
        assert!(
            content.contains("4242"),
            ".mcp.json should reference the given port"
        );
        assert!(
            content.contains("localhost"),
            ".mcp.json should reference localhost"
        );
        assert!(
            content.contains("huskies"),
            ".mcp.json should name the huskies server"
        );
    }

    #[test]
    fn scaffold_story_kit_does_not_overwrite_existing_mcp_json() {
        let dir = tempdir().unwrap();
        let mcp_path = dir.path().join(".mcp.json");
        fs::write(&mcp_path, "{\"custom\": true}").unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert_eq!(
            fs::read_to_string(&mcp_path).unwrap(),
            "{\"custom\": true}",
            "scaffold should not overwrite an existing .mcp.json"
        );
    }

    #[test]
    fn scaffold_gitignore_includes_mcp_json() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let root_gitignore = fs::read_to_string(dir.path().join(".gitignore")).unwrap();
        assert!(
            root_gitignore.contains(".mcp.json"),
            "root .gitignore should include .mcp.json (port is environment-specific)"
        );
    }

    #[test]
    fn scaffold_script_test_contains_detected_commands_for_rust() {
        let dir = tempdir().unwrap();
        fs::write(
            dir.path().join("Cargo.toml"),
            "[package]\nname = \"myapp\"\n",
        )
        .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join("script/test")).unwrap();
        assert!(
            content.contains("cargo test"),
            "Rust project scaffold should set cargo test in script/test"
        );
        assert!(
            !content.contains("No tests configured"),
            "should not use stub when stack is detected"
        );
    }

    #[test]
    fn scaffold_script_test_fallback_stub_when_no_stack() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join("script/test")).unwrap();
        assert!(
            content.contains("No tests configured"),
            "unknown stack should use the generic stub"
        );
    }

    #[test]
    fn scaffold_story_kit_creates_script_build_and_lint() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        assert!(
            dir.path().join("script/build").exists(),
            "script/build should be created by scaffold"
        );
        assert!(
            dir.path().join("script/lint").exists(),
            "script/lint should be created by scaffold"
        );
    }

    #[test]
    fn scaffold_story_kit_creates_executable_script_build_and_lint() {
        use std::os::unix::fs::PermissionsExt;

        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        for name in &["build", "lint"] {
            let path = dir.path().join("script").join(name);
            assert!(path.exists(), "script/{name} should be created");
            let perms = fs::metadata(&path).unwrap().permissions();
            assert!(
                perms.mode() & 0o111 != 0,
                "script/{name} should be executable"
            );
        }
    }

    #[test]
    fn scaffold_script_build_contains_detected_commands_for_rust() {
        let dir = tempdir().unwrap();
        fs::write(
            dir.path().join("Cargo.toml"),
            "[package]\nname = \"myapp\"\n",
        )
        .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join("script/build")).unwrap();
        assert!(
            content.contains("cargo build --release"),
            "Rust project scaffold should set cargo build --release in script/build"
        );
    }

    #[test]
    fn scaffold_script_lint_contains_detected_commands_for_rust() {
        let dir = tempdir().unwrap();
        fs::write(
            dir.path().join("Cargo.toml"),
            "[package]\nname = \"myapp\"\n",
        )
        .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join("script/lint")).unwrap();
        assert!(
            content.contains("cargo fmt --all --check"),
            "Rust project scaffold should include fmt check in script/lint"
        );
        assert!(
            content.contains("cargo clippy -- -D warnings"),
            "Rust project scaffold should include clippy in script/lint"
        );
    }

    #[test]
    fn scaffold_project_toml_contains_detected_components() {
        let dir = tempdir().unwrap();
        // Place a Cargo.toml in the project root before scaffolding
        fs::write(
            dir.path().join("Cargo.toml"),
            "[package]\nname = \"myapp\"\n",
        )
        .unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(
            content.contains("[[component]]"),
            "project.toml should contain a component entry"
        );
        assert!(
            content.contains("name = \"server\""),
            "Rust project should have a 'server' component"
        );
        assert!(
            content.contains("cargo check"),
            "Rust component should have cargo check setup"
        );
    }

    #[test]
    fn scaffold_project_toml_fallback_when_no_stack_detected() {
        let dir = tempdir().unwrap();
        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(dir.path().join(".huskies/project.toml")).unwrap();
        assert!(
            content.contains("[[component]]"),
            "project.toml should always have at least one component"
        );
        // Fallback uses generic app component with empty setup — no Rust-specific commands
        assert!(
            content.contains("name = \"app\""),
            "fallback should use generic 'app' component name"
        );
        assert!(
            !content.contains("cargo"),
            "fallback must not contain Rust-specific commands for non-Rust projects"
        );
    }

    #[test]
    fn scaffold_does_not_overwrite_existing_project_toml_with_components() {
        let dir = tempdir().unwrap();
        let sk_dir = dir.path().join(".huskies");
        fs::create_dir_all(&sk_dir).unwrap();
        let existing = "[[component]]\nname = \"custom\"\npath = \".\"\nsetup = [\"make build\"]\n";
        fs::write(sk_dir.join("project.toml"), existing).unwrap();

        scaffold_story_kit(dir.path(), 3001).unwrap();

        let content = fs::read_to_string(sk_dir.join("project.toml")).unwrap();
        assert_eq!(
            content, existing,
            "scaffold should not overwrite existing project.toml"
        );
    }
}