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Viewing File: paybill.php

<?php
require_once "../config.php";
session_start();

// ✅ Check login session
if (!isset($_SESSION['auth'])) {
    header("Location: ../login.php");
    exit;
}

$user_id = $_SESSION['auth'];

// ✅ Get user details
$stmt = $pdo->prepare("SELECT id, pin_hash FROM users WHERE id = ?");
$stmt->execute([$user_id]);
$user = $stmt->fetch(PDO::FETCH_ASSOC);
if (!$user) die("User not found.");

// ✅ Get all user accounts
$stmt = $pdo->prepare("SELECT HEX(id) AS id_hex, id, account_number, balance, currency 
                       FROM accounts WHERE user_id = ?");
$stmt->execute([$user_id]);
$accounts = $stmt->fetchAll(PDO::FETCH_ASSOC);
if (!$accounts) die("No account found for this user.");

$message = "";
$success = false;

if ($_SERVER["REQUEST_METHOD"] === "POST") {
    $account_id_hex = $_POST['account_id'] ?? '';
    $billType   = trim($_POST['bill_type'] ?? '');
    $refNumber  = trim($_POST['ref_number'] ?? '');
    $amount     = floatval($_POST['amount'] ?? 0);
    $pin        = trim($_POST['pin'] ?? '');

    if ($account_id_hex && $billType && $refNumber && $amount > 0 && $pin) {
        $account = null;
        foreach ($accounts as $acc) {
            if ($acc['id_hex'] === $account_id_hex) {
                $account = $acc;
                break;
            }
        }

        if (!$account) {
            $message = "❌ Invalid account selected.";
        } elseif (!password_verify($pin, $user['pin_hash'])) {
            $message = "❌ Invalid Transaction PIN.";
        } elseif ($account['balance'] < $amount) {
            $message = "❌ Insufficient balance.";
        } else {
            try {
                $pdo->beginTransaction();

                // Deduct balance
                $stmt = $pdo->prepare("UPDATE accounts SET balance = balance - ? WHERE id = UNHEX(?)");
                $stmt->execute([$amount, $account_id_hex]);

                // Insert transaction record
                $txId = bin2hex(random_bytes(16));
                $metadata = json_encode([
                    "type" => "bill_payment",
                    "bill_type" => $billType,
                    "ref_number" => $refNumber
                ]);

                $stmt = $pdo->prepare("
                    INSERT INTO transactions (id, status, amount, from_account_id, to_account_id, metadata, created_by)
                    VALUES (UNHEX(?), 'completed', ?, UNHEX(?), NULL, ?, ?)
                ");
                $stmt->execute([$txId, $amount, $account_id_hex, $metadata, $user_id]);

                $pdo->commit();

                $success = true;
                $message = "✅ Bill payment of " . $account['currency'] . " " . number_format($amount, 2) . " for $billType successful!";
            } catch (Exception $e) {
                $pdo->rollBack();
                $message = "❌ Transaction failed: " . $e->getMessage();
            }
        }
    } else {
        $message = "❌ Please fill all fields correctly.";
    }
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Pay Bills</title>
  <link rel="stylesheet" href="../style.css">
  <style>
    body { font-family: Arial, sans-serif; background:#f8f9fb; margin:0; display:flex; justify-content:center; }
    .container { max-width:450px; width:100%; background:#fff; min-height:100vh; padding:20px; }
    h2 { color:#0C4DA2; }
    form { margin-top:20px; display:flex; flex-direction:column; gap:15px; }
    input, select { padding:12px; border:1px solid #ccc; border-radius:6px; font-size:14px; }
    button { background:#0C4DA2; color:#fff; border:none; padding:12px; border-radius:6px; cursor:pointer; font-size:15px; }
    button:hover { background:#094080; }

    /* Modal Styles */
    .modal-overlay {
      display:none;
      position:fixed; top:0; left:0; width:100%; height:100%;
      background:rgba(0,0,0,0.5);
      justify-content:center; align-items:center;
      z-index:1000;
    }
    .modal-box {
      background:#fff;
      border-radius:16px;
      padding:30px;
      max-width:400px;
      width:90%;
      text-align:center;
      box-shadow:0 10px 30px rgba(0,0,0,0.2);
      animation: fadeIn 0.3s ease;
    }
    .modal-box.success { border-top:5px solid #0a8a4c; }
    .modal-box.error { border-top:5px solid #c0392b; }
    .modal-box h3 { margin:0; font-size:20px; }
    .modal-box p { margin:15px 0; font-size:15px; }
    .modal-box button {
      background:#0C4DA2;
      padding:10px 20px;
      border:none;
      border-radius:8px;
      color:#fff;
      cursor:pointer;
      font-size:14px;
    }
    .modal-box button:hover { background:#094080; }
    .checkmark {
      font-size:40px;
      margin-bottom:10px;
    }
    @keyframes fadeIn { from {opacity:0; transform:scale(0.95);} to {opacity:1; transform:scale(1);} }
  </style>
</head>
<body>
  <div class="container">
    <h2>Pay Bills</h2>

    <form method="POST">
      <label>Select Account</label>
      <select name="account_id" required>
        <option value="">-- Choose Account --</option>
        <?php foreach ($accounts as $acc): ?>
          <option value="<?= htmlspecialchars($acc['id_hex']) ?>">
            <?= htmlspecialchars($acc['currency']) ?> - <?= htmlspecialchars($acc['account_number']) ?> 
            (Bal: <?= number_format($acc['balance'],2) ?>)
          </option>
        <?php endforeach; ?>
      </select>

      <label>Bill Type</label>
      <select name="bill_type" required>
        <option value="">-- Select Bill --</option>
        <option value="Electricity">Electricity</option>
        <option value="Water">Water</option>
        <option value="Internet">Internet</option>
        <option value="TV Subscription">TV Subscription</option>
        <option value="Other">Other</option>
      </select>

      <label>Reference / Account Number</label>
      <input type="text" name="ref_number" placeholder="e.g. Meter No / Customer ID" required>

      <label>Amount</label>
      <input type="number" step="0.01" name="amount" placeholder="Enter amount" required>

      <label>Transaction PIN</label>
      <input type="password" name="pin" placeholder="Enter your PIN" required>

      <button type="submit">Pay Now</button>
    </form>

    <p style="margin-top:20px;"><a href="pay.php">← Back to Pay & Transfer</a></p>
  </div>

  <!-- ✅ Modal -->
  <?php if ($message): ?>
  <div class="modal-overlay" id="alertModal" style="display:flex;">
    <div class="modal-box <?= strpos($message,'✅')!==false ? 'success':'error' ?>">
      <div class="checkmark"><?= strpos($message,'✅')!==false ? '✔️' : '❌' ?></div>
      <h3><?= strpos($message,'✅')!==false ? 'Success' : 'Error' ?></h3>
      <p><?= htmlspecialchars($message) ?></p>
      <button onclick="closeModal()">OK</button>
    </div>
  </div>
  <?php endif; ?>

  <script>
    function closeModal() {
      document.getElementById('alertModal').style.display = 'none';
    }

    <?php if ($success): ?>
      // Redirect to dashboard after success
      setTimeout(() => { window.location.href = 'index.php'; }, 3000);
    <?php endif; ?>
  </script>
</body>
</html>
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