<?php
// ═══════════════════════════════════════════════════════════════
// passenger/ride/create_call_session.php
// PURPOSE  : Create a WebRTC call session and notify driver via FCM
// APP      : passenger
// AUTH     : JWT:passenger
// ═══════════════════════════════════════════════════════════════

declare(strict_types=1);

require_once __DIR__ . '/../../../connect.php';

try {
    if ($role !== 'passenger' || empty($user_id)) {
        printFailure('Unauthorized access');
        exit;
    }
    
    $rideId = $_POST['ride_id'] ?? null;
    if (!$rideId) {
        printFailure('Ride ID is required');
        exit;
    }

    // 1. Verify ride details and retrieve associated driver
    $stmt = $con->prepare("
        SELECT r.id, r.driver_id, p.first_name, p.last_name 
        FROM ride r
        JOIN passengers p ON p.id = r.passenger_id
        WHERE r.id = :rid AND r.passenger_id = :pid AND r.status IN ('accepted', 'arrived', 'started', 'begin', 'Begin', 'Apply', 'apply', 'Applied', 'applied')
        LIMIT 1
    ");
    $stmt->execute([':rid' => $rideId, ':pid' => $user_id]);
    $ride = $stmt->fetch();

    if (!$ride) {
        printFailure('No active ride found matching request', 404);
        exit;
    }

    $driverId = $ride['driver_id'];
    if (empty($driverId) || $driverId === 'yet') {
        printFailure('No driver accepted this ride yet', 400);
        exit;
    }

    $callerName = trim($encryptionHelper->decryptData($ride['first_name'] ?? '') . ' ' . $encryptionHelper->decryptData($ride['last_name'] ?? ''));

    // 2. Query Node.js signaling server to establish session
    $url = (getenv('VOICE_CALL_SERVER_URL') ?: 'https://calls.intaleqapp.com') . '/sessions';
    $apiKey = getenv('VOICE_CALL_API_KEY') ?: '';

    $ch = curl_init($url);
    $payload = json_encode([
        'ride_id' => (string)$rideId,
        'driver_id' => (string)$driverId,
        'passenger_id' => (string)$user_id
    ]);

    curl_setopt_array($ch, [
        CURLOPT_POST => true,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POSTFIELDS => $payload,
        CURLOPT_HTTPHEADER => [
            "x-api-key: $apiKey",
            "Content-Type: application/json"
        ],
        CURLOPT_TIMEOUT => 5,
        CURLOPT_SSL_VERIFYPEER => false
    ]);

    $result = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode !== 200) {
        error_log("[passenger_create_call_session.php] Signaling server session mapping failed: $result (HTTP $httpCode)");
        printFailure('Signaling server error', 502);
        exit;
    }

    $sessionData = json_decode($result, true);
    if (!isset($sessionData['session_id'])) {
        printFailure('Invalid response schema from signaling server');
        exit;
    }

    $sessionId = $sessionData['session_id'];

    // 3. Dispatch data-only FCM call trigger to Driver
    $stmtToken = $con->prepare("
        SELECT token 
        FROM driverToken 
        WHERE captain_id = :did 
        ORDER BY created_at DESC 
        LIMIT 1
    ");
    $stmtToken->execute([':did' => $driverId]);
    $driverTokenRow = $stmtToken->fetch();

    if ($driverTokenRow && !empty($driverTokenRow['token'])) {
        $decryptedToken = $encryptionHelper->decryptData($driverTokenRow['token']);
        sendFcmNotification(
            $decryptedToken,
            'Incoming Call',
            'Incoming WebRTC voice call',
            [
                'type' => 'incoming_call',
                'session_id' => (string)$sessionId,
                'caller_name' => $callerName,
                'caller_avatar' => '',
                'ride_id' => (string)$rideId
            ],
            'incoming_call',
            'ding'
        );
    }

    echo json_encode([
        'status' => 'success',
        'message' => 'Call session created successfully',
        'data' => [
            'session_id' => $sessionId,
            'expires_in' => $sessionData['expires_in'] ?? 60
        ]
    ], JSON_UNESCAPED_UNICODE);
    exit;

} catch (Throwable $e) {
    error_log("[passenger_create_call_session.php] Critical exception: " . $e->getMessage());
    printFailure('Server error', 500);
}