const { query } = require('../database/db');

class CycleFeedInitialBalance {
    /**
     * Get initial balance for a specific cycle
     * @param {string} cycleId - Cycle ID
     * @returns {Promise<Object|null>} Initial balance record or null if not found
     */
    static async getByCycleId(cycleId) {
        const result = await query(
            'SELECT * FROM cycle_feed_initial_balance WHERE cycle_id = $1',
            [cycleId]
        );
        return result.rows[0] || null;
    }

    /**
     * Insert or update initial balance for a cycle (upsert)
     * @param {string} cycleId - Cycle ID
     * @param {number} saldoAwal - Initial balance count (must be non-negative)
     * @param {string} createdBy - Username of creator
     * @returns {Promise<Object>} Created/updated initial balance record
     */
    static async upsert(cycleId, saldoAwal, createdBy) {
        const result = await query(
            `INSERT INTO cycle_feed_initial_balance (cycle_id, saldo_awal, created_by)
             VALUES ($1, $2, $3)
             ON CONFLICT (cycle_id)
             DO UPDATE SET
                saldo_awal = $2,
                updated_at = CURRENT_TIMESTAMP
             RETURNING *`,
            [cycleId, saldoAwal, createdBy]
        );
        return result.rows[0];
    }

    /**
     * Delete initial balance for a cycle
     * @param {string} cycleId - Cycle ID
     * @returns {Promise<void>}
     */
    static async delete(cycleId) {
        await query(
            'DELETE FROM cycle_feed_initial_balance WHERE cycle_id = $1',
            [cycleId]
        );
    }
}

module.exports = CycleFeedInitialBalance;