<?php
require_once __DIR__ . '/../helpers/session.php';
require_once __DIR__ . '/../../config/database.php';
require_once __DIR__ . '/../helpers/crypto.php';
require_once __DIR__ . '/../helpers/env.php';

loadEnv();

function save_config() {
    $conn = getConnection();
    $userId = $_SESSION['usuario_id'] ?? null;

    if (!$userId) {
        http_response_code(401);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Sesión expirada']);
        exit;
    }

    if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
        http_response_code(405);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Método no permitido']);
        exit;
    }

    $input = json_decode(file_get_contents('php://input'), true);
    
    if (json_last_error() !== JSON_ERROR_NONE) {
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'JSON inválido']);
        exit;
    }

    $host = trim($input['host'] ?? '');
    $port = intval($input['port'] ?? 80);
    $protocol = $input['protocol'] ?? 'https';
    $usuario = trim($input['usuario'] ?? '');
    $password = $input['password'] ?? '';
    $sync_pedimentos = $input['sync_pedimentos'] ?? true;
    $sync_coves = $input['sync_coves'] ?? true;

    // Validaciones
    if (empty($host) || empty($usuario) || empty($password)) {
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Todos los campos son obligatorios']);
        exit;
    }

    // Encriptar contraseña
    $encryptedPassword = encrypt($password);

    // Verificar si existe configuración
    $sqlCheck = "SELECT id FROM winsaai_config WHERE id_usuario = ?";
    $stmtCheck = sqlsrv_query($conn, $sqlCheck, [$userId]);

    if ($stmtCheck === false) {
        http_response_code(500);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Error en base de datos']);
        exit;
    }

    $existingConfig = sqlsrv_fetch_array($stmtCheck, SQLSRV_FETCH_ASSOC);
    sqlsrv_free_stmt($stmtCheck);

    if ($existingConfig) {
        // Actualizar
        $sql = "UPDATE winsaai_config 
                SET host = ?, port = ?, protocol = ?, usuario = ?, password = ?, 
                    sync_pedimentos = ?, sync_coves = ?, updated_at = GETDATE()
                WHERE id_usuario = ?";
        $params = [$host, $port, $protocol, $usuario, $encryptedPassword, 
                  $sync_pedimentos ? 1 : 0, $sync_coves ? 1 : 0, $userId];
    } else {
        // Insertar
        $sql = "INSERT INTO winsaai_config (id_usuario, host, port, protocol, usuario, password, sync_pedimentos, sync_coves)
                VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
        $params = [$userId, $host, $port, $protocol, $usuario, $encryptedPassword,
                  $sync_pedimentos ? 1 : 0, $sync_coves ? 1 : 0];
    }

    $stmt = sqlsrv_query($conn, $sql, $params);

    if ($stmt === false) {
        http_response_code(500);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Error al guardar configuración']);
        exit;
    }

    sqlsrv_free_stmt($stmt);

    header('Content-Type: application/json');
    echo json_encode(['success' => true, 'message' => 'Configuración guardada correctamente']);
}

function get_config() {
    $conn = getConnection();
    $userId = $_SESSION['usuario_id'] ?? null;

    if (!$userId) {
        http_response_code(401);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Sesión expirada']);
        exit;
    }

    $sql = "SELECT * FROM winsaai_config WHERE id_usuario = ?";
    $stmt = sqlsrv_query($conn, $sql, [$userId]);

    if ($stmt === false) {
        http_response_code(500);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Error en base de datos']);
        exit;
    }

    $config = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC);
    sqlsrv_free_stmt($stmt);

    if ($config) {
        // No enviar contraseña por seguridad
        unset($config['password']);
        // Convertir BIT a boolean
        $config['sync_pedimentos'] = (bool)$config['sync_pedimentos'];
        $config['sync_coves'] = (bool)$config['sync_coves'];
        
        header('Content-Type: application/json');
        echo json_encode(['success' => true, 'data' => $config]);
    } else {
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'No hay configuración']);
    }
}

function test_connection() {
    $conn = getConnection();
    $userId = $_SESSION['usuario_id'] ?? null;

    if (!$userId) {
        http_response_code(401);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Sesión expirada']);
        exit;
    }

    $input = json_decode(file_get_contents('php://input'), true);
    
    $host = trim($input['host'] ?? '');
    $port = intval($input['port'] ?? 80);
    $protocol = $input['protocol'] ?? 'https';
    $usuario = trim($input['usuario'] ?? '');
    $password = $input['password'] ?? '';

    if (empty($host) || empty($usuario) || empty($password)) {
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Faltan datos para probar conexión']);
        exit;
    }

    $url = "{$protocol}://{$host}:{$port}/api/test";
    
    // Simular prueba de conexión (aquí pondrías la lógica real)
    header('Content-Type: application/json');
    echo json_encode(['success' => true, 'message' => "Conexión exitosa con {$protocol}://{$host}:{$port}"]);
}

function sync_data() {
    $conn = getConnection();
    $userId = $_SESSION['usuario_id'] ?? null;

    if (!$userId) {
        http_response_code(401);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Sesión expirada']);
        exit;
    }

    // Obtener configuración del usuario
    $sql = "SELECT * FROM winsaai_config WHERE id_usuario = ?";
    $stmt = sqlsrv_query($conn, $sql, [$userId]);

    if ($stmt === false) {
        http_response_code(500);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'Error en base de datos']);
        exit;
    }

    $config = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC);
    sqlsrv_free_stmt($stmt);

    if (!$config) {
        http_response_code(400);
        header('Content-Type: application/json');
        echo json_encode(['success' => false, 'message' => 'No hay configuración de WINSAAI']);
        exit;
    }

    $input = json_decode(file_get_contents('php://input'), true);
    $syncType = $input['sync_type'] ?? 'both';

    // Simular sincronización
    $results = [];
    if ($syncType === 'pedimentos' || $syncType === 'both') {
        $results['pedimentos'] = ['total' => 10, 'processed' => 10];
    }
    if ($syncType === 'coves' || $syncType === 'both') {
        $results['coves'] = ['total' => 5, 'processed' => 5];
    }

    // Actualizar última sincronización
    $sqlUpdate = "UPDATE winsaai_config SET last_sync = GETDATE() WHERE id_usuario = ?";
    sqlsrv_query($conn, $sqlUpdate, [$userId]);

    header('Content-Type: application/json');
    echo json_encode(['success' => true, 'message' => 'Sincronización completada', 'data' => $results]);
}

function index() {
    header('Content-Type: application/json');
    echo json_encode([
        'success' => true,
        'message' => 'API WINSAAI disponible',
        'endpoints' => [
            'save_config' => '/IMPORTADORES/winsaai/save_config',
            'test_connection' => '/IMPORTADORES/winsaai/test_connection',
            'sync_data' => '/IMPORTADORES/winsaai/sync_data',
            'get_config' => '/IMPORTADORES/winsaai/get_config'
        ]
    ]);
}
?>