// WHATSAPP FUNCTIONS START //

add_action('gform_after_submission', 'send_whatsapp_message', 10, 2);
function send_whatsapp_message($entry, $form) {
    // Replace '1' with your actual Gravity Forms form ID
    if ($form['id'] != 1) { // Replace with your form ID
        return;
    }
    
    // Generate a unique booking ID
    $booking_id = uniqid('booking_');

    // Extract form field values using the actual field IDs
    $restaurant = rgar($entry, '1'); // Field ID for Restaurant
    $reservation_date = rgar($entry, '7'); // Field ID for Date of Reservation
    $reservation_time = rgar($entry, '8'); // Field ID for Time of Reservation
    $booking_name = rgar($entry, '9'); // Field ID for Booking Name
    $number_persons = rgar($entry, '10'); // Field ID for Number of Persons
    $phone_number = rgar($entry, '5'); // Field ID for Booking Contact Phone Number
    $email = rgar($entry, '6'); // Field ID for Booking Email

    // Convert date format from YYYY-MM-DD to DD/MM/YYYY
    $date_object = DateTime::createFromFormat('Y-m-d', $reservation_date);
    $formatted_date = $date_object->format('d/m/Y');

    // Normalize the phone number
    $normalized_phone_number = normalize_phone_number($phone_number);

    // Store the booking ID in the entry metadata
    gform_update_meta($entry['id'], 'booking_id', $booking_id);

    // Message for the WhatsApp group
    $group_message_text = "Booking ID: $booking_id\n";
    $group_message_text .= "Restaurant: $restaurant\n";
    $group_message_text .= "Date of Reservation: $formatted_date\n"; // Use formatted date
    $group_message_text .= "Time of Reservation: $reservation_time\n";
    $group_message_text .= "Booking Name: $booking_name\n";
    $group_message_text .= "Persons: $number_persons\n";
    $group_message_text .= "Contact Phone Number: $phone_number\n";
    $group_message_text .= "Email: $email\n\n";
    $group_message_text .= "Please reply with 'accept $booking_id' or 'decline $booking_id' to confirm or reject this booking.";

    // Message for the customer
    $customer_message_text = "Hi! Thank you for your booking with Korsan Restaurants. Your booking is tentatively confirmed - if for any reason your booking cannot be accommodated on the requested night, our restaurant manager will get in touch with you.\n\n";
    $customer_message_text .= "Your booking details are as follows:\n\n";
    $customer_message_text .= "Restaurant: $restaurant\n";
    $customer_message_text .= "Date of Reservation: $formatted_date\n";
    $customer_message_text .= "Time of Reservation: $reservation_time\n";
    $customer_message_text .= "Booking Name: $booking_name\n";
    $customer_message_text .= "Persons: $number_persons\n";
    $customer_message_text .= "Contact Phone Number: $phone_number\n";
    $customer_message_text .= "Email: $email\n\n";
    $customer_message_text .= "We look forward to welcoming you at $restaurant!";

    // Log for debugging
    error_log("Group message: $group_message_text");
    error_log("Customer message: $customer_message_text");

    // Send message to WhatsApp group
    $nodeurl = 'https://api.kpnotify.com/send';
    $data_group = [
        'receiver'  => '120363317428466192@g.us', // WhatsApp Group ID
        'msgtext'   => $group_message_text,  // Message text from form submission
        'token'     => 'nvebldL2g90qB1ZV5zTi',
    ];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data_group));
    curl_setopt($ch, CURLOPT_URL, $nodeurl);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $response_group = curl_exec($ch);
    curl_close($ch);

    // Log response for debugging
    error_log("Group response: " . print_r($response_group, true));

    // Send message to the customer
    $data_customer = [
        'receiver'  => $normalized_phone_number, // Customer's phone number in international format
        'msgtext'   => $customer_message_text,  // Message text to customer
        'token'     => 'nvebldL2g90qB1ZV5zTi',
    ];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data_customer));
    curl_setopt($ch, CURLOPT_URL, $nodeurl);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $response_customer = curl_exec($ch);
    curl_close($ch);

    // Log response for debugging
    error_log("Customer response: " . print_r($response_customer, true));

    // Optional: log the response for debugging
    GFCommon::log_debug(__METHOD__ . '(): group response => ' . print_r($response_group, true));
    GFCommon::log_debug(__METHOD__ . '(): customer response => ' . print_r($response_customer, true));
}

function normalize_phone_number($phone_number) {
    // Remove all non-numeric characters except '+'
    $phone_number = preg_replace('/[^\d+]/', '', $phone_number);

    // If the phone number starts with '+', assume it's already in international format
    if (substr($phone_number, 0, 1) === '+') {
        return $phone_number;
    }

    // If the phone number starts with '00', replace it with '+'
    if (substr($phone_number, 0, 2) === '00') {
        return '+' . substr($phone_number, 2);
    }

    // If the phone number starts with '0', replace it with the default country code (e.g., '+44')
    if (substr($phone_number, 0, 1) === '0') {
        // You can change '+44' to your default country code if needed
        return '+44' . substr($phone_number, 1);
    }

    // Default case (assume international format without the '+')
    return '+' . $phone_number;
}

function get_booking_details($booking_id) {
    // Get the entry ID based on the booking ID from Gravity Forms
    $search_criteria = [
        'field_filters' => [
            [
                'key'   => 'booking_id',
                'value' => $booking_id,
            ],
        ],
    ];
    $entries = GFAPI::get_entries(0, $search_criteria);

    if (empty($entries)) {
        return null;
    }

    $entry = $entries[0]; // Assuming booking ID is unique, get the first entry

    // Extract booking details from the entry
    return [
        'booking_id' => $booking_id,
        'restaurant' => rgar($entry, '1'),
        'reservation_date' => rgar($entry, '7'),
        'reservation_time' => rgar($entry, '8'),
        'booking_name' => rgar($entry, '9'),
        'number_persons' => rgar($entry, '10'),
        'phone_number' => rgar($entry, '5'),
        'email' => rgar($entry, '6'),
    ];
}

// WHATSAPP FUNCTIONS END //


// REST API ENDPOINT START //

add_action('rest_api_init', function () {
    register_rest_route('korsan/v1', '/booking-details/(?P<booking_id>[a-zA-Z0-9_]+)', array(
        'methods' => 'GET',
        'callback' => 'korsan_get_booking_details',
    ));
});

if (!function_exists('korsan_get_booking_details')) {
    function korsan_get_booking_details(WP_REST_Request $request) {
        $booking_id = $request['booking_id'];
        
        // Get the entry ID based on the booking ID from Gravity Forms
        $search_criteria = [
            'field_filters' => [
                [
                    'key'   => 'booking_id',
                    'value' => $booking_id,
                ],
            ],
        ];
        $entries = GFAPI::get_entries(0, $search_criteria);

        if (empty($entries)) {
            return new WP_Error('no_booking', 'Booking not found', array('status' => 404));
        }

        $entry = $entries[0]; // Assuming booking ID is unique, get the first entry

        // Extract booking details from the entry
        $booking_details = [
            'booking_id' => $booking_id,
            'restaurant' => rgar($entry, '1'),
            'reservation_date' => rgar($entry, '7'),
            'reservation_time' => rgar($entry, '8'),
            'booking_name' => rgar($entry, '9'),
            'number_persons' => rgar($entry, '10'),
            'phone_number' => rgar($entry, '5'),
            'email' => rgar($entry, '6'),
        ];

        return $booking_details;
    }
}

// REST API ENDPOINT END //