import 'dart:io';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:url_launcher/url_launcher.dart';
import '../widgets/kr_toast.dart';
import '../common/app_config.dart';
import '../routes/app_pages.dart';
import '../widgets/dialogs/hi_dialog.dart';
import '../modules/kr_crisp_chat/controllers/kr_crisp_controller.dart';

class KRCommonUtil {
  /// 是否正在打开客服（防重复点击）
  static bool _kr_isOpeningCustomerService = false;

  /// 预热客服（提前初始化控制器）
  static void kr_warmUpCustomerService() {
    if (Platform.isAndroid || Platform.isIOS || Platform.isMacOS) {
      if (!Get.isRegistered<KRCrispController>()) {
        Get.put(KRCrispController(), permanent: true);
        debugPrint('客服系统预热中（持久模式）...');
      }
    }
  }

  /// 打开客服
  static Future<void> kr_openCustomerService() async {
    // 🔧 防重复点击
    if (_kr_isOpeningCustomerService) {
      return;
    }

    final websiteId = AppConfig.getInstance().kr_website_id;
    if (websiteId.isEmpty) {
      HIDialog.show(
        title: '提示',
        message: '加载失败',
      );
      return;
    }

    // 🔧 Windows 端直接跳转外部浏览器
    if (Platform.isWindows) {
      _kr_isOpeningCustomerService = true;

      // 显示加载提示
      kr_showToast('userInfo.openingCustomerService'.tr);

      // 直接使用 zh
      final Uri url = Uri.parse(
        'https://go.crisp.chat/chat/embed/?website_id=$websiteId&locale=zh',
      );

      try {
        if (await canLaunchUrl(url)) {
          await launchUrl(url, mode: LaunchMode.externalApplication);
        } else {
          kr_showToast("common.cannotOpenBrowser".tr);
        }
      } catch (e) {
        kr_showToast("common.openLinkFailed".tr);
      } finally {
        // 延迟重置状态
        Future.delayed(const Duration(seconds: 2), () {
          _kr_isOpeningCustomerService = false;
        });
      }
      return;
    }

    // 移动平台 (Android/iOS)：直接调用原生 SDK，避免页面跳转闪烁
    if (Platform.isAndroid || Platform.isIOS) {
      _kr_isOpeningCustomerService = true;

      // 预先显示加载提示（可选，原生 SDK 启动很快）
      // kr_showToast('userInfo.openingCustomerService'.tr);

      try {
        // 优先使用已注册的控制器
        KRCrispController crispController;
        if (Get.isRegistered<KRCrispController>()) {
          crispController = Get.find<KRCrispController>();
        } else {
          crispController = Get.put(KRCrispController(), permanent: true);
        }
        // 直接调用原生打开方法
        await crispController.kr_openNativeCrispChat();
      } catch (e) {
        debugPrint('打开原生客服失败: $e');
        // 如果原生失败，可以考虑降级到内置页面或报错
        Get.toNamed(Routes.KR_CRISP);
      } finally {
        Future.delayed(const Duration(seconds: 2), () {
          _kr_isOpeningCustomerService = false;
        });
      }
      return;
    }

    // macOS/桌面平台：跳转内置页面 (WebView 实现)
    _kr_isOpeningCustomerService = true;

    Get.toNamed(Routes.KR_CRISP);

    // 延迟重置状态
    Future.delayed(const Duration(seconds: 2), () {
      _kr_isOpeningCustomerService = false;
    });
  }

  /// 提示 meesage: 提示内容, toastPosition: 提示显示的位置, timeout: 显示时间（毫秒）
  static kr_showToast(String message,
      {KRToastPosition toastPosition = KRToastPosition.center,
      int timeout = 2500}) {
    KRToast.kr_showToast(
      message,
      position: toastPosition,
      duration: Duration(milliseconds: timeout),
    );
  }

  /// 显示加载动画
  static kr_showLoading({String? message}) {
    KRToast.kr_showLoading(message: message);
  }

  /// 隐藏加载动画
  static kr_hideLoading() {
    KRToast.kr_hideLoading();
  }

  /// 格式化字节数为可读字符串
  /// [bytes] 字节数
  static String kr_formatBytes(int bytes) {
    if (bytes <= 0) return "0 B";
    
    const List<String> suffixes = ["B", "KB", "MB", "GB", "TB"];
    int i = 0;
    double value = bytes.toDouble();
    
    while (value >= 1024 && i < suffixes.length - 1) {
      value /= 1024;
      i++;
    }
    
    return "${value.toStringAsFixed(2)} ${suffixes[i]}";
  }
}