//! Agent worktree management — creates and configures git worktrees for agents.
use crate::config::ProjectConfig;
use std::path::{Path, PathBuf};

use super::AgentPool;

impl AgentPool {
    /// Create a worktree for the given story using the server port (writes .mcp.json).
    pub async fn create_worktree(
        &self,
        project_root: &Path,
        story_id: &str,
    ) -> Result<crate::worktree::WorktreeInfo, String> {
        let config = ProjectConfig::load(project_root)?;
        crate::worktree::create_worktree(project_root, story_id, &config, self.port).await
    }

    /// Get project root helper.
    pub fn get_project_root(&self, state: &crate::state::SessionState) -> Result<PathBuf, String> {
        state.get_project_root()
    }
}

/// Return the active pipeline stage directory name for `story_id`, or `None` if the
/// story is not in any active stage (`2_current/`, `3_qa/`, `4_merge/`).
pub(super) fn find_active_story_stage(
    _project_root: &Path,
    story_id: &str,
) -> Option<&'static str> {
    if let Ok(Some(item)) = crate::pipeline_state::read_typed(story_id)
        && item.stage.is_active()
    {
        return Some(item.stage.dir_name());
    }
    None
}

#[cfg(test)]
mod tests {
    use super::find_active_story_stage;

    #[test]
    fn find_active_story_stage_detects_current() {
        crate::db::ensure_content_store();
        crate::db::write_item_with_content("10_story_test", "2_current", "---\nname: Test\n---\n");
        let tmp = tempfile::tempdir().unwrap();
        assert_eq!(
            find_active_story_stage(tmp.path(), "10_story_test"),
            Some("2_current")
        );
    }

    #[test]
    fn find_active_story_stage_detects_qa() {
        crate::db::ensure_content_store();
        crate::db::write_item_with_content("11_story_test", "3_qa", "---\nname: Test\n---\n");
        let tmp = tempfile::tempdir().unwrap();
        assert_eq!(
            find_active_story_stage(tmp.path(), "11_story_test"),
            Some("3_qa")
        );
    }

    #[test]
    fn find_active_story_stage_detects_merge() {
        crate::db::ensure_content_store();
        crate::db::write_item_with_content("12_story_test", "4_merge", "---\nname: Test\n---\n");
        let tmp = tempfile::tempdir().unwrap();
        assert_eq!(
            find_active_story_stage(tmp.path(), "12_story_test"),
            Some("4_merge")
        );
    }

    #[test]
    fn find_active_story_stage_returns_none_for_unknown_story() {
        let tmp = tempfile::tempdir().unwrap();
        assert_eq!(find_active_story_stage(tmp.path(), "99_nonexistent"), None);
    }
}