const express = require('express');
const router = express.Router();
const CycleFeedInitialBalance = require('../models/CycleFeedInitialBalance');
const { convertKeysToCamelCase } = require('../utils/caseConverter');

/**
 * GET /api/cycle-feed-initial-balance/:cycleId
 * Get initial balance for a specific cycle
 */
router.get('/:cycleId', async (req, res) => {
    try {
        const { cycleId } = req.params;
        const balance = await CycleFeedInitialBalance.getByCycleId(cycleId);

        if (!balance) {
            return res.json({ success: true, data: null });
        }

        res.json({ success: true, data: convertKeysToCamelCase(balance) });
    } catch (error) {
        console.error('Error fetching cycle feed initial balance:', error);
        res.status(500).json({ success: false, error: error.message });
    }
});

/**
 * PUT /api/cycle-feed-initial-balance
 * Upsert initial balance for a cycle
 */
router.put('/', async (req, res) => {
    try {
        const { cycleId, saldoAwal, createdBy } = req.body;

        // Validation
        if (!cycleId || saldoAwal === undefined) {
            return res.status(400).json({
                success: false,
                error: 'Missing required fields: cycleId, saldoAwal'
            });
        }

        if (saldoAwal < 0) {
            return res.status(400).json({
                success: false,
                error: 'saldoAwal cannot be negative'
            });
        }

        if (!Number.isInteger(saldoAwal)) {
            return res.status(400).json({
                success: false,
                error: 'saldoAwal must be an integer'
            });
        }

        const balance = await CycleFeedInitialBalance.upsert(
            cycleId,
            saldoAwal,
            createdBy || 'system'
        );

        res.json({ success: true, data: convertKeysToCamelCase(balance) });
    } catch (error) {
        console.error('Error saving cycle feed initial balance:', error);
        res.status(500).json({ success: false, error: error.message });
    }
});

/**
 * DELETE /api/cycle-feed-initial-balance/:cycleId
 * Delete initial balance for a cycle
 */
router.delete('/:cycleId', async (req, res) => {
    try {
        const { cycleId } = req.params;
        await CycleFeedInitialBalance.delete(cycleId);
        res.json({ success: true });
    } catch (error) {
        console.error('Error deleting cycle feed initial balance:', error);
        res.status(500).json({ success: false, error: error.message });
    }
});

module.exports = router;