const express = require('express');
const router = express.Router();
const { Pool } = require('pg');

const pgPool = new Pool({
    host: process.env.PGHOST || 'postgres',
    port: process.env.PGPORT || 5432,
    user: process.env.PGUSER || 'postgres',
    password: process.env.PGPASSWORD || 'postgres',
    database: process.env.PGDATABASE || 'ckqr',
});

// Placeholder for ICICI Payment Gateway initialization
router.post('/icici/initiate', async (req, res) => {
    const { amount, plan, userId } = req.body;
    
    try {
        const userCheck = await pgPool.query('SELECT is_email_verified FROM users WHERE id = $1', [userId]);
        if (userCheck.rows.length > 0 && !userCheck.rows[0].is_email_verified) {
            return res.status(400).json({ error: 'Please verify your email address before upgrading your plan.' });
        }
    } catch (err) {
        console.error('Error checking verification status', err);
        return res.status(500).json({ error: 'Server error' });
    }

    // Here you would construct the ICICI request payload, compute checksums, etc.
    // and return the URL or parameters for the frontend to redirect the user to ICICI.
    
    console.log(`Initiating ICICI payment for user ${userId}, plan: ${plan}, amount: ${amount}`);
    
    res.json({
        message: 'Payment initiation logic goes here',
        redirectUrl: 'https://placeholder.icicibank.com/pay'
    });
});

// Placeholder for ICICI Webhook/Callback
router.post('/icici/webhook', async (req, res) => {
    // Here ICICI will post back payment success or failure
    // We would verify the signature, and if successful, upgrade the user in the database.
    
    console.log('Received ICICI Webhook:', req.body);
    
    res.status(200).send('Webhook received');
});

module.exports = router;
