// Task Team — Tasks CRUD — 2026-03-29
async function taskRoutes(app) {
    // List tasks
    app.get('/tasks', async (req, reply) => {
        const { status, group_id, limit = 50, offset = 0 } = req.query;
        let query = 'SELECT t.*, tg.name as group_name, tg.color as group_color, tg.icon as group_icon FROM tasks t LEFT JOIN task_groups tg ON t.group_id = tg.id WHERE 1=1';
        const params = [];
        if (status) { params.push(status); query += ` AND t.status = $${params.length}`; }
        if (group_id) { params.push(group_id); query += ` AND t.group_id = $${params.length}`; }
        query += ' ORDER BY t.scheduled_at ASC NULLS LAST, t.priority DESC, t.created_at DESC';
        params.push(limit); query += ` LIMIT $${params.length}`;
        params.push(offset); query += ` OFFSET $${params.length}`;
        const { rows } = await app.db.query(query, params);
        return { data: rows, total: rows.length };
    });

    // Get single task
    app.get('/tasks/:id', async (req) => {
        const { rows } = await app.db.query(
            'SELECT t.*, tg.name as group_name, tg.color as group_color FROM tasks t LEFT JOIN task_groups tg ON t.group_id = tg.id WHERE t.id = $1',
            [req.params.id]
        );
        if (!rows.length) throw { statusCode: 404, message: 'Task not found' };
        return { data: rows[0] };
    });

    // Create task
    app.post('/tasks', async (req) => {
        const { title, description, status, group_id, priority, scheduled_at, due_at, assigned_to } = req.body;
        const { rows } = await app.db.query(
            `INSERT INTO tasks (title, description, status, group_id, priority, scheduled_at, due_at, assigned_to)
             VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING *`,
            [title, description || '', status || 'pending', group_id, priority || 'medium', scheduled_at, due_at, assigned_to || []]
        );
        return { data: rows[0] };
    });

    // Update task
    app.put('/tasks/:id', async (req) => {
        const fields = req.body;
        const sets = [];
        const params = [];
        let i = 1;
        for (const [key, value] of Object.entries(fields)) {
            if (['title','description','status','group_id','priority','scheduled_at','due_at','assigned_to','completed_at'].includes(key)) {
                sets.push(`${key} = $${i}`);
                params.push(value);
                i++;
            }
        }
        if (fields.status === 'completed' && !fields.completed_at) {
            sets.push(`completed_at = NOW()`);
        }
        sets.push(`updated_at = NOW()`);
        params.push(req.params.id);
        const { rows } = await app.db.query(
            `UPDATE tasks SET ${sets.join(', ')} WHERE id = $${i} RETURNING *`, params
        );
        if (!rows.length) throw { statusCode: 404, message: 'Task not found' };
        return { data: rows[0] };
    });

    // Delete task
    app.delete('/tasks/:id', async (req) => {
        const { rowCount } = await app.db.query('DELETE FROM tasks WHERE id = $1', [req.params.id]);
        if (!rowCount) throw { statusCode: 404, message: 'Task not found' };
        return { status: 'deleted' };
    });

    // Task comments
    app.get('/tasks/:id/comments', async (req) => {
        const { rows } = await app.db.query(
            'SELECT * FROM task_comments WHERE task_id = $1 ORDER BY created_at ASC', [req.params.id]
        );
        return { data: rows };
    });

    app.post('/tasks/:id/comments', async (req) => {
        const { content, is_ai } = req.body;
        const { rows } = await app.db.query(
            'INSERT INTO task_comments (task_id, content, is_ai) VALUES ($1, $2, $3) RETURNING *',
            [req.params.id, content, is_ai || false]
        );
        return { data: rows[0] };
    });
}

module.exports = taskRoutes;