codetether-agent 4.5.7

use super::Session;
use anyhow::Result;
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};
use std::path::PathBuf;
use tokio::fs;

/// Summary of a session for listing
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SessionSummary {
    pub id: String,
    pub title: Option<String>,
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
    pub message_count: usize,
    pub agent: String,
    /// The working directory this session was created in
    #[serde(default)]
    pub directory: Option<PathBuf>,
}

/// List all sessions
pub async fn list_sessions() -> Result<Vec<SessionSummary>> {
    let sessions_dir = crate::config::Config::data_dir()
        .map(|d| d.join("sessions"))
        .ok_or_else(|| anyhow::anyhow!("Could not determine data directory"))?;

    if !sessions_dir.exists() {
        return Ok(Vec::new());
    }

    let mut summaries = Vec::new();
    let mut entries = fs::read_dir(&sessions_dir).await?;

    while let Some(entry) = entries.next_entry().await? {
        let path = entry.path();
        if path.extension().map(|e| e == "json").unwrap_or(false)
            && let Ok(content) = fs::read_to_string(&path).await
            && let Ok(session) = serde_json::from_str::<Session>(&content)
        {
            summaries.push(SessionSummary {
                id: session.id,
                title: session.title,
                created_at: session.created_at,
                updated_at: session.updated_at,
                message_count: session.messages.len(),
                agent: session.agent,
                directory: session.metadata.directory,
            });
        }
    }

    summaries.sort_by(|a, b| b.updated_at.cmp(&a.updated_at));
    Ok(summaries)
}

/// List sessions scoped to a specific directory (workspace)
///
/// Only returns sessions whose `metadata.directory` matches the given path.
/// This prevents sessions from other workspaces "leaking" into the TUI.
pub async fn list_sessions_for_directory(dir: &std::path::Path) -> Result<Vec<SessionSummary>> {
    let all = list_sessions().await?;
    let canonical = dir.canonicalize().unwrap_or_else(|_| dir.to_path_buf());
    Ok(all
        .into_iter()
        .filter(|s| {
            s.directory
                .as_ref()
                .map(|d| d.canonicalize().unwrap_or_else(|_| d.clone()) == canonical)
                .unwrap_or(false)
        })
        .collect())
}

/// List sessions for a directory with pagination.
///
/// - `limit`: Maximum number of sessions to return (default: 100)
/// - `offset`: Number of sessions to skip (default: 0)
pub async fn list_sessions_paged(
    dir: &std::path::Path,
    limit: usize,
    offset: usize,
) -> Result<Vec<SessionSummary>> {
    let mut sessions = list_sessions_for_directory(dir).await?;
    sessions.sort_by(|a, b| b.updated_at.cmp(&a.updated_at));
    Ok(sessions.into_iter().skip(offset).take(limit).collect())
}