// Task Team — Groups CRUD — 2026-03-29
async function groupRoutes(app) {
    app.get('/groups', async (req) => {
        const lang = req.query.lang;
        const { rows } = await app.db.query(
            'SELECT * FROM task_groups ORDER BY order_index ASC'
        );
        const data = rows.map(row => {
            if (lang && row.names && row.names[lang]) {
                return { ...row, name: row.names[lang] };
            }
            return row;
        });
        return { data };
    });

    app.get('/groups/:id', async (req) => {
        const lang = req.query.lang;
        const { rows } = await app.db.query('SELECT * FROM task_groups WHERE id = $1', [req.params.id]);
        if (!rows.length) throw { statusCode: 404, message: 'Group not found' };
        const row = rows[0];
        if (lang && row.names && row.names[lang]) {
            row.name = row.names[lang];
        }
        return { data: row };
    });

    app.post('/groups', async (req) => {
        const { name, color, icon, order_index, time_zones, user_id } = req.body;
        const { rows } = await app.db.query(
            'INSERT INTO task_groups (user_id, name, color, icon, order_index, time_zones) VALUES ($1,$2,$3,$4,$5,$6) RETURNING *',
            [user_id, name, color, icon || '', order_index || 0, JSON.stringify(time_zones || [])]
        );
        return { data: rows[0] };
    });

    app.put('/groups/:id', async (req) => {
        const { name, color, icon, order_index, time_zones, locations } = req.body;
        const { rows } = await app.db.query(
            `UPDATE task_groups SET name=COALESCE($1,name), color=COALESCE($2,color), icon=COALESCE($3,icon),
             order_index=COALESCE($4,order_index), time_zones=COALESCE($5,time_zones),
             locations=COALESCE($6,locations), updated_at=NOW()
             WHERE id=$7 RETURNING *`,
            [name, color, icon, order_index,
             time_zones ? JSON.stringify(time_zones) : null,
             locations ? JSON.stringify(locations) : null,
             req.params.id]
        );
        if (!rows.length) throw { statusCode: 404, message: 'Group not found' };
        return { data: rows[0] };
    });

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

    app.put('/groups/reorder', async (req) => {
        const { order } = req.body; // [{id, order_index}]
        const client = await app.db.connect();
        try {
            await client.query('BEGIN');
            for (const item of order) {
                await client.query('UPDATE task_groups SET order_index=$1, updated_at=NOW() WHERE id=$2', [item.order_index, item.id]);
            }
            await client.query('COMMIT');
        } catch (e) {
            await client.query('ROLLBACK');
            throw e;
        } finally {
            client.release();
        }
        return { status: 'ok' };
    });

    // Update time zones for a group
    app.put('/groups/:id/timezones', async (req) => {
        const { time_zones } = req.body;
        if (!Array.isArray(time_zones)) {
            throw { statusCode: 400, message: 'time_zones must be an array of [{days, from, to}]' };
        }
        for (const tz of time_zones) {
            if (!Array.isArray(tz.days) || !tz.from || !tz.to) {
                throw { statusCode: 400, message: 'Each timezone must have days (array), from (HH:MM), to (HH:MM)' };
            }
        }
        const { rows } = await app.db.query(
            'UPDATE task_groups SET time_zones = $1, updated_at = NOW() WHERE id = $2 RETURNING *',
            [JSON.stringify(time_zones), req.params.id]
        );
        if (!rows.length) throw { statusCode: 404, message: 'Group not found' };
        return { data: rows[0] };
    });

    // Update GPS locations for a group
    app.put('/groups/:id/locations', async (req) => {
        const { locations } = req.body;
        if (!Array.isArray(locations)) {
            throw { statusCode: 400, message: 'locations must be an array of [{name, lat, lng, radius_m}]' };
        }
        for (const loc of locations) {
            if (!loc.name || loc.lat === undefined || loc.lng === undefined) {
                throw { statusCode: 400, message: 'Each location must have name, lat, lng' };
            }
            if (typeof loc.lat !== 'number' || typeof loc.lng !== 'number') {
                throw { statusCode: 400, message: 'lat and lng must be numbers' };
            }
        }
        const { rows } = await app.db.query(
            'UPDATE task_groups SET locations = $1, updated_at = NOW() WHERE id = $2 RETURNING *',
            [JSON.stringify(locations), req.params.id]
        );
        if (!rows.length) throw { statusCode: 404, message: 'Group not found' };
        return { data: rows[0] };
    });

    // Combined schedule: time zones + locations for a group
    app.get('/groups/:id/schedule', async (req) => {
        const { rows } = await app.db.query(
            'SELECT id, name, time_zones, locations FROM task_groups WHERE id = $1',
            [req.params.id]
        );
        if (!rows.length) throw { statusCode: 404, message: 'Group not found' };
        const g = rows[0];
        return {
            data: {
                group_id: g.id,
                group_name: g.name,
                time_zones: g.time_zones || [],
                locations: g.locations || [],
                summary: {
                    tz_count: (g.time_zones || []).length,
                    loc_count: (g.locations || []).length
                }
            }
        };
    });
}

module.exports = groupRoutes;