<?php
require_once 'db/config.php';
require_once 'includes/currency_helper.php';
session_start();

if (!isset($_SESSION['user_id'])) {
    header("Location: login.php");
    exit;
}

$user_id = $_SESSION['user_id'];
$pdo = db();

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['amount'])) {
    $amount = (float)$_POST['amount'];
    $type = $_POST['type'] ?? 'fiat';
    $currency = $_POST['currency'] ?? 'USDT';
    $network = $_POST['network'] ?? '';
    
    $fiat_rates = get_fiat_rates();
    $rate = $fiat_rates[$currency] ?? 1.0;
    $usdt_amount = ($rate > 0) ? ($amount / $rate) : $amount;
    
    $expires_at = date('Y-m-d H:i:s', strtotime('+30 minutes'));
    
    // Create order with status 'matching'
    $stmt = $pdo->prepare("INSERT INTO fiat_orders (user_id, amount, usdt_amount, exchange_rate, currency, status, expires_at, created_at) VALUES (?, ?, ?, ?, ?, 'matching', ?, CURRENT_TIMESTAMP)");
    $stmt->execute([$user_id, $amount, $usdt_amount, $rate, $currency, $expires_at]);
    $order_id = $pdo->lastInsertId();
    
    // Get user IP
    $user_ip = $_SERVER['REMOTE_ADDR'];
    if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
        $user_ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    }

    // Explicit notification message for admin/chat
    $method_info = ($type === 'usdt') ? "USDT ($network)" : "法币 ($currency)";
    $msg = "👉 用户发起充值，金额 $amount $currency\n订单号: #$order_id\n方式: $method_info";
    
    $stmt = $pdo->prepare("INSERT INTO messages (user_id, sender, message) VALUES (?, 'user', ?)");
    $stmt->execute([$user_id, $msg]);
    
    // Redirect to chat
    header("Location: chat.php");
    exit;
} else {
    header("Location: deposit.php");
    exit;
}