<?php
/**
 * API - Enviar mensaje desde el número turnero
 * Soporta: text, template (básico)
 */

require_once __DIR__ . '/../../../config/config.php';
require_once __DIR__ . '/../../../services/WhatsAppService.php';
requireAuthentication();

header('Content-Type: application/json; charset=utf-8');

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['success' => false, 'error' => 'Método no permitido']);
    exit;
}

try {
    $input = json_decode(file_get_contents('php://input'), true);
    if (!$input) {
        $input = $_POST;
    }

    $userId  = intval($input['user_id'] ?? 0);
    $message = trim($input['message'] ?? '');

    if (!$userId || $message === '') {
        http_response_code(400);
        echo json_encode(['success' => false, 'error' => 'user_id y message son requeridos']);
        exit;
    }

    $db   = Database::getInstance();
    $user = $db->fetch("SELECT phone_number, name FROM users WHERE id = :id", ['id' => $userId]);

    if (!$user) {
        http_response_code(404);
        echo json_encode(['success' => false, 'error' => 'Usuario no encontrado']);
        exit;
    }

    // Verificar que el número turnero esté configurado
    $turneroPhoneId = getConfigFromDB('whatsapp_phone_number_id_turnero', '');
    if (empty($turneroPhoneId)) {
        http_response_code(503);
        echo json_encode(['success' => false, 'error' => 'El número de WhatsApp del turnero no está configurado']);
        exit;
    }

    $operatorId = $_SESSION['admin_id'] ?? $_SESSION['user_id'] ?? null;

    $wa       = new WhatsAppService('turnero');
    $response = $wa->sendTextMessage(
        $user['phone_number'],
        $message,
        $operatorId ? ['operator_id' => $operatorId, 'canal' => 'turnero'] : ['canal' => 'turnero']
    );

    echo json_encode(['success' => true, 'whatsapp_response' => $response]);

} catch (Exception $e) {
    error_log('chat_send_message.php: ' . $e->getMessage());
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}