// Task Team — Admin Dashboard — 2026-03-30
async function adminRoutes(app) {
    // User management
    app.get("/admin/users", async (req) => {
        const { rows } = await app.db.query(
            `SELECT u.id, u.email, u.name, u.phone, u.language, u.auth_provider, u.created_at,
                    (SELECT count(*) FROM tasks WHERE user_id=u.id) as task_count,
                    (SELECT count(*) FROM goals WHERE user_id=u.id) as goal_count
             FROM users u ORDER BY u.created_at DESC`
        );
        return { data: rows };
    });

    app.delete("/admin/users/:id", async (req) => {
        await app.db.query("DELETE FROM users WHERE id = $1", [req.params.id]);
        return { status: "deleted" };
    });

    // System analytics
    app.get("/admin/analytics", async (req) => {
        const { rows: overview } = await app.db.query(`
            SELECT 
                (SELECT count(*) FROM users) as total_users,
                (SELECT count(*) FROM users WHERE created_at > NOW() - INTERVAL '7 days') as new_users_7d,
                (SELECT count(*) FROM tasks) as total_tasks,
                (SELECT count(*) FROM tasks WHERE status='completed' OR status='done') as completed_tasks,
                (SELECT count(*) FROM tasks WHERE created_at > NOW() - INTERVAL '24 hours') as tasks_today,
                (SELECT count(*) FROM goals) as total_goals,
                (SELECT count(*) FROM invitations WHERE status='accepted') as accepted_invites,
                (SELECT count(*) FROM task_comments WHERE is_ai=true) as ai_messages,
                (SELECT count(*) FROM error_logs WHERE created_at > NOW() - INTERVAL '24 hours') as errors_24h,
                (SELECT count(*) FROM projects) as total_projects
        `);
        
        // Daily activity (last 7 days)
        const { rows: daily } = await app.db.query(`
            SELECT date_trunc('day', created_at)::date as day, count(*) as tasks_created
            FROM tasks WHERE created_at > NOW() - INTERVAL '7 days'
            GROUP BY 1 ORDER BY 1
        `);

        return { data: { overview: overview[0], daily } };
    });

    // Recent activity feed
    app.get("/admin/activity", async (req) => {
        const { rows } = await app.db.query(`
            (SELECT 'task_created' as type, title as detail, created_at FROM tasks ORDER BY created_at DESC LIMIT 5)
            UNION ALL
            (SELECT 'user_registered', email, created_at FROM users ORDER BY created_at DESC LIMIT 5)
            UNION ALL
            (SELECT 'goal_created', title, created_at FROM goals ORDER BY created_at DESC LIMIT 5)
            UNION ALL
            (SELECT 'invite_sent', invitee_email, created_at FROM invitations ORDER BY created_at DESC LIMIT 5)
            ORDER BY created_at DESC LIMIT 20
        `);
        return { data: rows };
    });

    // Error log management
    app.delete("/admin/errors/clear", async (req) => {
        const { rowCount } = await app.db.query("DELETE FROM error_logs WHERE created_at < NOW() - INTERVAL '7 days'");
        return { status: "cleared", deleted: rowCount };
    });
}

module.exports = adminRoutes;