import 'dart:convert';
import 'dart:io';

import 'package:background_downloader/background_downloader.dart';
import 'package:common_utils/common_utils.dart';
import 'package:ducafe_ui_core/ducafe_ui_core.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:forui/forui.dart';
import 'package:get/get.dart';
import 'package:permission_handler/permission_handler.dart';

import 'package:pj_supermarket_cloud/common/index.dart';

import 'setting_components.dart';

class VersionManageController extends GetxController {
  static const String _tag = '版本管理 Controller';

  final currentPage = 1.obs;
  final totalPage = 0.obs;
  final pageSize = 3.obs;
  final versionList = <ServiceAppVersion>[].obs;
  final isLoading = false.obs;
  final errorMessage = ''.obs;

  @override
  void onInit() {
    super.onInit();
    getVersionList();
  }

  Future<void> doPage({int? page}) async {
    if (page != null) currentPage.value = page;
    await getVersionList(showLoading: true);
  }

  Future<void> getVersionList({bool showLoading = false}) async {
    isLoading.value = true;
    errorMessage.value = '';
    if (showLoading) {
      EasyLoading.show(status: '查询中...', maskType: EasyLoadingMaskType.black);
    }
    try {
      final data = await AppApi.openCardList({
        'appUniqueCode': Constants.deviceUniqueCode,
        'current': currentPage.value,
        'size': pageSize.value,
      });
      logger.d('|$_tag|获取版本列表成功:${json.encode(data)}');
      versionList.assignAll(data?.records ?? const []);
      totalPage.value = data?.total ?? 0;
    } catch (e, stack) {
      versionList.clear();
      errorMessage.value = '版本列表加载失败，请检查网络后重试';
      logger.e('|$_tag|获取版本列表失败error:|$e|stack:|$stack|');
    } finally {
      isLoading.value = false;
      if (showLoading) EasyLoading.dismiss();
    }
  }

  Future<void> doDownload(String url) async {
    if (url.isEmpty) {
      Toast.error(msg: '当前版本没有可用下载地址');
      return;
    }
    var downUrl = url;
    if (!url.startsWith('http://') && !url.startsWith('https://')) {
      downUrl = '${Constants.ossUrl}/api/admin/sys-file/oss/file?fileName=$url';
    }
    if (!Platform.isAndroid) {
      EasyLoading.showInfo('当前平台不支持系统下载');
      return;
    }
    EasyLoading.show(status: '下载中...', maskType: EasyLoadingMaskType.black);
    try {
      var granted = await Permission.storage.request().isGranted;
      if (!granted && await Permission.manageExternalStorage.isDenied) {
        granted = await Permission.manageExternalStorage.request().isGranted;
      }
      if (!granted) {
        EasyLoading.showError('存储权限未授权，无法下载');
        return;
      }
      final ext = AppFileTool.getFileExtension(downUrl);
      final useExt = ObjectUtil.isEmpty(ext) ? '.apk' : ext;
      final now = DateTime.now();
      final fileName = 'pj_xfj_${now.millisecondsSinceEpoch}$useExt';
      final task = DownloadTask(
        url: downUrl,
        filename: fileName,
        updates: Updates.statusAndProgress,
        baseDirectory: BaseDirectory.applicationDocuments,
      );
      final result = await FileDownloader().download(
        task,
        onProgress: (progress) => EasyLoading.showProgress(
          progress,
          status: '(${(progress * 100).toStringAsFixed(0)}%) 下载中...',
        ),
        onStatus: (status) => logger.d('|$_tag|下载状态:$status'),
      );
      if (result.status != TaskStatus.complete) {
        EasyLoading.showError('下载失败');
        return;
      }
      final movedPath = await FileDownloader().moveToSharedStorage(
        task,
        SharedStorage.downloads,
        mimeType: useExt == '.apk'
            ? 'application/vnd.android.package-archive'
            : 'application/octet-stream',
      );
      if (ObjectUtil.isEmpty(movedPath)) {
        EasyLoading.showError('移动到下载目录失败');
        return;
      }
      logger.i('|$_tag|下载完成:$movedPath');
      EasyLoading.showSuccess('下载完成');
    } catch (e, stack) {
      logger.e('|$_tag|下载失败error:|$e|stack:|$stack|');
      EasyLoading.showError('下载失败');
    } finally {
      EasyLoading.dismiss();
    }
  }
}

Widget settingVersionSetting(BuildContext context) {
  final controller = Get.isRegistered<VersionManageController>()
      ? Get.find<VersionManageController>()
      : Get.put(VersionManageController());
  return Column(
    children: [
      Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: [
          SettingActionButton(
            label: '刷新版本列表',
            icon: FAssets.icons.refreshCw,
            primary: true,
            onTap: controller.doPage,
          ),
        ],
      ),
      SizedBox(height: 20.h),
      Expanded(
        child: Obx(() {
          if (controller.isLoading.value) {
            return const Center(child: CircularProgressIndicator());
          }
          if (controller.errorMessage.isNotEmpty) {
            return SettingEmpty(message: controller.errorMessage.value);
          }
          if (controller.versionList.isEmpty) {
            return const SettingEmpty(message: '暂无版本信息');
          }
          return GridView.builder(
            gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 3,
              crossAxisSpacing: XfjDesignTokens.cardGap.w,
              mainAxisSpacing: XfjDesignTokens.cardGap.h,
              childAspectRatio: 1.25,
            ),
            itemCount: controller.versionList.length,
            itemBuilder: (context, index) => _VersionCard(
              item: controller.versionList[index],
              recommended: index == 0,
              onDownload: () => controller.doDownload(
                controller.versionList[index].downloadUrl ?? '',
              ),
            ),
          );
        }),
      ),
      SizedBox(height: XfjDesignTokens.cardGap.h),
      Obx(
        () => appPage(
          context,
          pageNo: controller.currentPage.value,
          pageSize: controller.pageSize.value,
          total: controller.totalPage.value,
          onPageChanged: (pageNo) => controller.doPage(page: pageNo),
        ),
      ),
      SizedBox(height: XfjDesignTokens.cardGap.h),
      SettingNotice(
        text: '下载需要 Android 存储权限。下载完成后仍需按照终端发布流程确认版本来源并执行安装。',
        background: Color(0xFFFFF9E8),
        borderColor: Color(0x4DF2A817),
        icon: FAssets.icons.triangleAlert,
      ),
    ],
  );
}

class _VersionCard extends StatelessWidget {
  const _VersionCard({
    required this.item,
    required this.recommended,
    required this.onDownload,
  });

  final ServiceAppVersion item;
  final bool recommended;
  final VoidCallback onDownload;

  @override
  Widget build(BuildContext context) {
    final theme = FTheme.of(context);
    final platform =
        AppPlatformEnum.values.fromCode(item.platform ?? '')?.title ?? '未知平台';
    final status =
        AppVersionStatusEnum.values.fromCode(item.status ?? '')?.title ??
            '未知状态';
    return Container(
      clipBehavior: Clip.antiAlias,
      decoration: BoxDecoration(
        color: XfjDesignTokens.surface,
        border: Border.all(color: XfjDesignTokens.line),
        borderRadius: BorderRadius.circular(XfjDesignTokens.cardRadius),
        boxShadow: XfjDesignTokens.surfaceShadow,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Container(
            padding: EdgeInsets.all(20.w),
            decoration: const BoxDecoration(
              border: Border(bottom: BorderSide(color: XfjDesignTokens.line)),
            ),
            child: Row(
              children: [
                Container(
                  width: 52.w,
                  height: 52.w,
                  alignment: Alignment.center,
                  decoration: BoxDecoration(
                    color: XfjDesignTokens.primarySoft,
                    borderRadius: BorderRadius.circular(
                      XfjDesignTokens.controlRadius,
                    ),
                  ),
                  child: FIcon(
                    FAssets.icons.rocket,
                    color: XfjDesignTokens.primary,
                    size: 28.sp,
                  ),
                ),
                SizedBox(width: 14.w),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        '版本 ${item.versionName ?? '--'}',
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: theme.typography.xl.copyWith(
                          color: XfjDesignTokens.ink,
                          fontWeight: FontWeight.w800,
                        ),
                      ),
                      SizedBox(height: 4.h),
                      Text(
                        '$platform · Build ${item.versionCode ?? '--'}',
                        style: theme.typography.sm.copyWith(
                          color: XfjDesignTokens.muted,
                        ),
                      ),
                    ],
                  ),
                ),
                Container(
                  padding: EdgeInsets.symmetric(
                    horizontal: 10.w,
                    vertical: 5.h,
                  ),
                  decoration: BoxDecoration(
                    color: recommended
                        ? XfjDesignTokens.primarySoft
                        : XfjDesignTokens.control,
                    borderRadius: BorderRadius.circular(999),
                  ),
                  child: Text(
                    recommended ? '推荐更新' : status,
                    style: theme.typography.sm.copyWith(
                      color: recommended
                          ? XfjDesignTokens.primary
                          : XfjDesignTokens.muted,
                    ),
                  ),
                ),
              ],
            ),
          ),
          Expanded(
            child: Padding(
              padding: EdgeInsets.all(20.w),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    '更新内容',
                    style: theme.typography.base.copyWith(
                      color: XfjDesignTokens.ink,
                      fontWeight: FontWeight.w700,
                    ),
                  ),
                  SizedBox(height: 10.h),
                  Expanded(
                    child: Text(
                      item.updateContent ?? '暂无更新内容',
                      maxLines: 5,
                      overflow: TextOverflow.ellipsis,
                      style: theme.typography.sm.copyWith(
                        color: XfjDesignTokens.muted,
                        height: 1.5,
                      ),
                    ),
                  ),
                  SizedBox(height: 12.h),
                  SizedBox(
                    width: double.infinity,
                    child: SettingActionButton(
                      label: '下载 APK',
                      icon: FAssets.icons.arrowDownToLine,
                      primary: recommended,
                      enabled: ObjectUtil.isNotEmpty(item.downloadUrl),
                      onTap: onDownload,
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}