import 'package:device_plugin_interface/device_plugin_interface.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';

import '../../core/utils/logger.dart';
import '../../core/utils/version_compare.dart';
import '../../devices/device_hub.dart';
import '../../routes/app_routes.dart';
import '../models/appconfig.dart';
import '../models/appconfig_model.dart';

/// 连上设备后的固件升级检查（一次会话只提醒一次）——厂商无关。
///
/// 当前版本来自在线会话的 [DeviceInfo.firmwareVersion]，最新版本来自
/// `user_getappconfig` 下发的产品配置（按设备名匹配）。
class OtaCheckService extends GetxService {
  static const String _tag = 'OtaCheckService';

  static bool _hasCheckedInCurrentSession = false;
  static bool _isCheckingInProgress = false;

  static OtaCheckService get to => Get.find<OtaCheckService>();

  /// 重置检查状态（仅在应用重启时调用）
  static void resetCheckStatus() {
    _hasCheckedInCurrentSession = false;
    _isCheckingInProgress = false;
  }

  bool shouldCheckOta() => !_hasCheckedInCurrentSession && !_isCheckingInProgress;

  void _markAsChecked() {
    _hasCheckedInCurrentSession = true;
    _isCheckingInProgress = false;
  }

  bool _isCurrentlyOnHomePage() {
    final currentRoute = Get.currentRoute;
    return currentRoute == Routes.home || currentRoute == Routes.initial;
  }

  DBProduct? _findProduct(String name) {
    if (!AppConfig.isInitialized()) return null;
    final n = name.trim().toUpperCase();
    if (n.isEmpty) return null;
    for (final p in AppConfig.config.products) {
      final pn = p.devicename.trim().toUpperCase();
      if (pn.isEmpty) continue;
      if (pn.contains(n) || n.contains(pn)) return p;
    }
    return null;
  }

  /// 执行一次检查。[isFullyConnected] 为 false 直接跳过。返回是否真的检查了。
  Future<bool> performOtaCheck(bool isFullyConnected) async {
    bool isForceUpdate = false;
    try {
      if (!shouldCheckOta()) return false;
      if (!isFullyConnected) return false;
      if (!_isCurrentlyOnHomePage()) return false;

      final session = DeviceHub.to.sessionWith(DeviceCapability.ota);
      if (session == null) return false;
      _isCheckingInProgress = true;

      final currentVersion = session.info.firmwareVersion ?? '';
      final product = _findProduct(session.info.name);
      final latestVersion = product?.version?.split('+').first.trim() ?? '';
      Logger.d(_tag, '当前版本: $currentVersion, 最新版本: $latestVersion');

      final hasUpdate = latestVersion.isNotEmpty &&
          (currentVersion.isEmpty ||
              VersionCompare.isNewer(latestVersion, currentVersion));
      if (hasUpdate) {
        isForceUpdate = product?.isforceupdate ?? false;
        if (_isCurrentlyOnHomePage()) {
          _showOtaUpgradeDialog(latestVersion);
        }
      } else {
        Logger.d(_tag, '当前已是最新版本');
      }

      if (!isForceUpdate) _markAsChecked();
      _isCheckingInProgress = false;
      return true;
    } catch (e) {
      Logger.e(_tag, '检查OTA升级失败: $e');
      if (!isForceUpdate) _markAsChecked();
      _isCheckingInProgress = false;
      return false;
    }
  }

  void _showOtaUpgradeDialog(String latestVersion) {
    if (!_isCurrentlyOnHomePage()) return;
    final isDarkMode = Get.isDarkMode;
    Get.dialog(
      AlertDialog(
        title: Row(
          children: [
            Icon(
              Icons.headset,
              color: isDarkMode ? const Color(0xFF0066CC) : Colors.blue[600],
              size: 24.sp,
            ),
            SizedBox(width: 8.w),
            Flexible(
              child: Text(
                'ota_newVersionFound'.tr,
                style: TextStyle(
                  color: isDarkMode ? Colors.white : Colors.blue[700],
                  fontWeight: FontWeight.w600,
                  fontSize: 20.sp,
                ),
                softWrap: true,
                maxLines: 2,
              ),
            ),
          ],
        ),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(
              '${'latestFirmwareVersion'.tr}: $latestVersion',
              style: TextStyle(
                color: isDarkMode ? Colors.grey[400] : Colors.grey[600],
                fontWeight: FontWeight.w500,
                fontSize: 16.sp,
              ),
            ),
          ],
        ),
        actions: [
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              TextButton(
                onPressed: () => Get.back(),
                child: Text(
                  'talkLater'.tr,
                  style: TextStyle(
                    color: isDarkMode ? Colors.grey[400] : Colors.grey[600],
                  ),
                ),
              ),
              ElevatedButton(
                onPressed: () {
                  Get.back();
                  Get.toNamed(Routes.otaUpgrade);
                },
                style: ElevatedButton.styleFrom(
                  backgroundColor:
                      isDarkMode ? const Color(0xFF0066CC) : Colors.blue[600],
                  foregroundColor: Colors.white,
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(8.sp),
                  ),
                  side: isDarkMode
                      ? BorderSide(color: Colors.grey[800]!, width: 1)
                      : BorderSide.none,
                ),
                child: Text('ota_updateNow'.tr, style: TextStyle(fontSize: 14.sp)),
              ),
            ],
          ),
        ],
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12.sp)),
        backgroundColor: isDarkMode ? const Color(0xFF1A1A1A) : Colors.white,
      ),
      barrierDismissible: true,
    );
  }

  Map<String, dynamic> getCheckStatus() => {
        'hasCheckedInCurrentSession': _hasCheckedInCurrentSession,
        'isCheckingInProgress': _isCheckingInProgress,
        'currentRoute': Get.currentRoute,
        'isOnHomePage': _isCurrentlyOnHomePage(),
      };
}