<?php
require_once '../vendor/autoload.php';
require_once '../db/config.php';
require_once '../telnyx/config.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['error' => 'Method not allowed']);
    exit;
}

$client_id = $_POST['client_id'] ?? null;
$message = $_POST['message'] ?? null;

if (empty($client_id) || empty($message)) {
    http_response_code(400);
    echo json_encode(['error' => 'Client ID and message are required']);
    exit;
}

// Fetch client phone number
$stmt = db()->prepare("SELECT phone FROM clients WHERE id = ?");
$stmt->execute([$client_id]);
$client = $stmt->fetch(PDO::FETCH_ASSOC);

if (!$client || empty($client['phone'])) {
    http_response_code(404);
    echo json_encode(['error' => 'Client not found or phone number is missing']);
    exit;
}

$recipient_phone = $client['phone'];

// Initialize Telnyx
\Telnyx\Telnyx::setApiKey(TELNYX_API_KEY);

try {
    $response = \Telnyx\Message::create([
        'from' => TELNYX_MESSAGING_PROFILE_ID, // Your Telnyx sending number or messaging profile ID
        'to' => $recipient_phone,
        'text' => $message,
    ]);

    // Log the message to the database
    $log_stmt = db()->prepare("INSERT INTO sms_logs (client_id, user_id, sender, recipient, message, status) VALUES (?, ?, ?, ?, ?, ?)");
    $log_stmt->execute([
        $client_id,
        $_SESSION['user_id'], // Assuming admin/coach is logged in
        TELNYX_MESSAGING_PROFILE_ID,
        $recipient_phone,
        $message,
        'sent' // or $response->status
    ]);

    echo json_encode(['success' => true, 'message_id' => $response->id]);

} catch (\Telnyx\Exception\ApiErrorException $e) {
    http_response_code(500);
    echo json_encode(['error' => 'Telnyx API error: ' . $e->getMessage()]);
    
    // Log the failure
    $log_stmt = db()->prepare("INSERT INTO sms_logs (client_id, user_id, sender, recipient, message, status) VALUES (?, ?, ?, ?, ?, ?)");
    $log_stmt->execute([
        $client_id,
        $_SESSION['user_id'],
        TELNYX_MESSAGING_PROFILE_ID,
        $recipient_phone,
        $message,
        'failed'
    ]);
}