import 'package:dio/dio.dart';

import '../models/app_version.dart';
import '../models/tv_app.dart';
import 'api_client.dart';
import '../utils/session_org_scope.dart';

/// 应用管理服务：APP 版本管理与 TV 应用管理。
///
/// 对接真实「爱视后台」：
/// - APP 版本：/api/device/orgGroupAppVersion/*
/// - TV 应用：/api/theme/tvapp/*
class AppService {
  AppService({Dio? dio}) : _dio = dio ?? ApiClient.instance.dio;

  final Dio _dio;

  // ================ APP 版本管理 ================

  /// 获取 APP 版本列表（分页，可按组织/分组筛选）。
  ///
  /// GET /device/orgGroupAppVersion/list?page=&limit=&orgId=&groupId=
  Future<List<AppVersion>> getAppVersionList({
    int page = 1,
    int limit = 20,
    String? orgId,
    String? groupId,
  }) async {
    final effectiveOrgId = orgId ??
        (SessionOrgScope.instance.enabled
            ? SessionOrgScope.instance.currentOrgId
            : null);
    final response = await _dio.get<dynamic>(
      '/device/orgGroupAppVersion/list',
      queryParameters: {
        'page': page,
        'limit': limit,
        if (effectiveOrgId != null) 'orgId': effectiveOrgId,
        if (groupId != null) 'groupId': groupId,
      },
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(AppVersion.fromJson)
        .toList();
  }

  /// 按 orgId 查询该组织直接配置的版本（单体）。
  ///
  /// 对齐 Web 端 `searchAppVersion`：每个 scope=ORG 的组织至多一条版本配置，
  /// 有则返回当前版本（进入编辑流程）、无则返回 null（走新增流程）。
  ///
  /// GET /device/orgGroupAppVersion/search?orgId=
  ///
  /// 注意：拦截器已解包 `{code,msg,data}` 信封，`response.data` 即内层 data；
  /// 兼容 data 为 `{appVersion: {...}}`、版本对象直接返回、或 null（无配置）三种形态。
  Future<Map<String, dynamic>?> searchAppVersion({
    required String orgId,
    String? groupId,
  }) async {
    if (orgId.isEmpty && groupId == null) {
      throw const ApiException(400, 'orgId 与 groupId 需二选一');
    }
    final response = await _dio.get<dynamic>(
      '/device/orgGroupAppVersion/search',
      queryParameters: {
        if (orgId.isNotEmpty) 'orgId': orgId,
        if (groupId != null) 'groupId': groupId,
      },
    );
    final data = response.data;
    if (data == null) return null;
    if (data is Map<String, dynamic>) {
      final appVersion = data['appVersion'];
      if (appVersion is Map) {
        return Map<String, dynamic>.from(appVersion);
      }
      // 直接是版本对象（含 id 或 versionName）。
      if (data.containsKey('id') || data.containsKey('versionName')) {
        return data;
      }
    }
    return null;
  }

  /// 获取 APP 版本详情。
  ///
  /// GET /device/orgGroupAppVersion/info/{id}
  Future<AppVersion> getAppVersionInfo(String id) async {
    final response =
        await _dio.get<dynamic>('/device/orgGroupAppVersion/info/$id');
    final data = response.data;
    if (data is! Map<String, dynamic>) {
      throw ApiException(500, 'APP 版本信息加载失败：$id');
    }
    return AppVersion.fromJson(data);
  }

  /// 新增 APP 版本。
  ///
  /// POST /device/orgGroupAppVersion/save，body 为版本数据。
  Future<void> saveAppVersion(Map<String, dynamic> data) async {
    await _dio.post<dynamic>(
      '/device/orgGroupAppVersion/save',
      data: data,
    );
  }

  /// 修改 APP 版本。
  ///
  /// POST /device/orgGroupAppVersion/update，body 为版本数据（含 id）。
  Future<void> updateAppVersion(Map<String, dynamic> data) async {
    await _dio.post<dynamic>(
      '/device/orgGroupAppVersion/update',
      data: data,
    );
  }

  /// 批量删除 APP 版本。
  ///
  /// POST /device/orgGroupAppVersion/delete，body 为 `{ids: [...]}`。
  Future<void> deleteAppVersion(List<int> ids) async {
    await _dio.post<dynamic>(
      '/device/orgGroupAppVersion/delete',
      data: {'ids': ids},
    );
  }

  // ================ TV 应用管理 ================

  /// 获取 TV 应用列表（分页，可按名称/组织/分组筛选）。
  ///
  /// GET /theme/tvapp/list?page=&limit=&appName=&orgId=&groupId=
  Future<List<TvApp>> getTvAppList({
    int page = 1,
    int limit = 20,
    String? appName,
    String? orgId,
    String? groupId,
  }) async {
    final effectiveOrgId = orgId ??
        (SessionOrgScope.instance.enabled
            ? SessionOrgScope.instance.currentOrgId
            : null);
    final response = await _dio.get<dynamic>(
      '/theme/tvapp/list',
      queryParameters: {
        'page': page,
        'limit': limit,
        if (appName != null) 'appName': appName,
        if (effectiveOrgId != null) 'orgId': effectiveOrgId,
        if (groupId != null) 'groupId': groupId,
      },
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(TvApp.fromJson)
        .toList();
  }

  /// 获取 TV 应用详情。
  ///
  /// GET /theme/tvapp/info/{id}
  Future<TvApp> getTvAppInfo(String id) async {
    final response = await _dio.get<dynamic>('/theme/tvapp/info/$id');
    final data = response.data;
    if (data is! Map<String, dynamic>) {
      throw ApiException(500, 'TV 应用信息加载失败：$id');
    }
    return TvApp.fromJson(data);
  }

  /// 新增或修改 TV 应用。
  ///
  /// POST /theme/tvapp/save，body 为应用数据。
  Future<void> saveTvApp(Map<String, dynamic> data) async {
    await _dio.post<dynamic>('/theme/tvapp/save', data: data);
  }

  /// 批量删除 TV 应用。
  ///
  /// POST /theme/tvapp/delete，body 为 `{ids: [...]}`。
  Future<void> deleteTvApp(List<int> ids) async {
    await _dio.post<dynamic>(
      '/theme/tvapp/delete',
      data: {'ids': ids},
    );
  }

  // ================ 工具方法 ================

  /// 兼容列表响应的三种形态：
  /// `{list: [...], totalCount}` / `{page: {list, totalCount}}` / 直接数组。
  static List<dynamic> _extractList(dynamic data) {
    if (data is List) {
      return data;
    }
    if (data is Map<String, dynamic>) {
      final list = data['list'];
      if (list is List) {
        return list;
      }
      final page = data['page'];
      if (page is Map<String, dynamic> && page['list'] is List) {
        return page['list'] as List;
      }
    }
    return const <dynamic>[];
  }
}