import 'package:dio/dio.dart';

import '../models/intro_category.dart';
import 'api_client.dart';
import '../utils/session_org_scope.dart';

/// 介绍页管理服务：分类、子分类、详情。
///
/// 对接真实「爱视后台」/api/company/* 接口。
/// 响应已由 [ApiInterceptor] 解包 `{code,msg,data}` 信封，直接消费 data。
class IntroService {
  IntroService({Dio? dio}) : _dio = dio ?? ApiClient.instance.dio;

  final Dio _dio;

  // ================ 分类管理 ================

  /// 获取介绍页分类列表（分页）。
  ///
  /// GET /company/introCategory/list?page=&limit=&orgId=
  Future<List<IntroCategory>> getIntroCategoryList({
    int page = 1,
    int limit = 20,
    dynamic orgId,
  }) async {
    // 受限账号（SessionOrgScope 启用）未显式传入 orgId 时，自动带上当前组织，
    // 避免列表接口忽略组织过滤而返回全量跨组织分类。
    final effectiveOrgId = orgId ??
        (SessionOrgScope.instance.enabled
            ? SessionOrgScope.instance.currentOrgId
            : null);
    final params = <String, dynamic>{'page': page, 'limit': limit};
    if (effectiveOrgId != null && effectiveOrgId.toString().isNotEmpty) {
      params['orgId'] = effectiveOrgId;
    }
    final response = await _dio.get<dynamic>(
      '/company/introCategory/list',
      queryParameters: params,
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroCategory.fromJson)
        .toList();
  }

  /// 获取全部分类（不分页，用于下拉选择）。
  ///
  /// GET /company/introCategory/all
  Future<List<IntroCategory>> getIntroCategoryAll() async {
    final response = await _dio.get<dynamic>('/company/introCategory/all');
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroCategory.fromJson)
        .toList();
  }

  /// 获取分类详情。
  ///
  /// GET /company/introCategory/info/{id}
  Future<IntroCategory> getIntroCategoryInfo(String id) async {
    final response =
        await _dio.get<dynamic>('/company/introCategory/info/$id');
    final data = response.data;
    if (data is! Map<String, dynamic>) {
      throw ApiException(500, '分类信息加载失败：$id');
    }
    return IntroCategory.fromJson(data);
  }

  /// 新增或修改分类。
  ///
  /// 有 id 则 POST /company/introCategory/update，否则 POST /company/introCategory/save。
  Future<void> saveIntroCategory(Map<String, dynamic> data) async {
    final hasId = data['id'] != null &&
        data['id'].toString().isNotEmpty &&
        data['id'].toString() != '0';
    final url = hasId
        ? '/company/introCategory/update'
        : '/company/introCategory/save';
    await _dio.post<dynamic>(url, data: data);
  }

  /// 批量删除分类。
  ///
  /// POST /company/introCategory/delete，body 为 `{ids: [...]}`。
  Future<void> deleteIntroCategory(List<int> ids) async {
    await _dio.post<dynamic>(
      '/company/introCategory/delete',
      data: {'ids': ids},
    );
  }

  // ================ 子分类管理 ================

  /// 获取子分类列表（分页）。
  ///
  /// GET /company/introSubcategory/list?page=&limit=
  Future<List<IntroSubcategory>> getIntroSubcategoryList({
    int page = 1,
    int limit = 20,
  }) async {
    final response = await _dio.get<dynamic>(
      '/company/introSubcategory/list',
      queryParameters: {'page': page, 'limit': limit},
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroSubcategory.fromJson)
        .toList();
  }

  /// 按分类 ID 获取子分类列表。
  ///
  /// GET /company/introSubcategory/listByCategory/{categoryId}
  Future<List<IntroSubcategory>> getIntroSubcategoryListByCategory(
    String categoryId,
  ) async {
    final response = await _dio.get<dynamic>(
      '/company/introSubcategory/listByCategory/$categoryId',
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroSubcategory.fromJson)
        .toList();
  }

  /// 获取子分类详情。
  ///
  /// GET /company/introSubcategory/info/{id}
  Future<IntroSubcategory> getIntroSubcategoryInfo(String id) async {
    final response =
        await _dio.get<dynamic>('/company/introSubcategory/info/$id');
    final data = response.data;
    if (data is! Map<String, dynamic>) {
      throw ApiException(500, '子分类信息加载失败：$id');
    }
    return IntroSubcategory.fromJson(data);
  }

  /// 新增或修改子分类。
  ///
  /// 有 id 则 POST /company/introSubcategory/update，否则 POST /company/introSubcategory/save。
  Future<void> saveIntroSubcategory(Map<String, dynamic> data) async {
    final hasId = data['id'] != null &&
        data['id'].toString().isNotEmpty &&
        data['id'].toString() != '0';
    final url = hasId
        ? '/company/introSubcategory/update'
        : '/company/introSubcategory/save';
    await _dio.post<dynamic>(url, data: data);
  }

  /// 批量删除子分类。
  ///
  /// POST /company/introSubcategory/delete，body 为 `{ids: [...]}`。
  Future<void> deleteIntroSubcategory(List<int> ids) async {
    await _dio.post<dynamic>(
      '/company/introSubcategory/delete',
      data: {'ids': ids},
    );
  }

  // ================ 详情管理 ================

  /// 获取介绍页详情列表（分页）。
  ///
  /// GET /company/introDetail/list?page=&limit=
  Future<List<IntroDetail>> getIntroDetailList({
    int page = 1,
    int limit = 20,
  }) async {
    final response = await _dio.get<dynamic>(
      '/company/introDetail/list',
      queryParameters: {'page': page, 'limit': limit},
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroDetail.fromJson)
        .toList();
  }

  /// 按子分类 ID 获取详情列表。
  ///
  /// GET /company/introDetail/listBySubcategory/{subcategoryId}
  Future<List<IntroDetail>> getIntroDetailListBySubcategory(
    String subcategoryId,
  ) async {
    final response = await _dio.get<dynamic>(
      '/company/introDetail/listBySubcategory/$subcategoryId',
    );
    final list = _extractList(response.data);
    return list
        .whereType<Map<String, dynamic>>()
        .map(IntroDetail.fromJson)
        .toList();
  }

  /// 获取详情信息。
  ///
  /// GET /company/introDetail/info/{id}
  Future<IntroDetail> getIntroDetailInfo(String id) async {
    final response =
        await _dio.get<dynamic>('/company/introDetail/info/$id');
    final data = response.data;
    if (data is! Map<String, dynamic>) {
      throw ApiException(500, '详情信息加载失败：$id');
    }
    return IntroDetail.fromJson(data);
  }

  /// 新增或修改详情。
  ///
  /// 有 id 则 POST /company/introDetail/update，否则 POST /company/introDetail/save。
  Future<void> saveIntroDetail(Map<String, dynamic> data) async {
    final hasId = data['id'] != null &&
        data['id'].toString().isNotEmpty &&
        data['id'].toString() != '0';
    final url = hasId
        ? '/company/introDetail/update'
        : '/company/introDetail/save';
    await _dio.post<dynamic>(url, data: data);
  }

  /// 批量删除详情。
  ///
  /// POST /company/introDetail/delete，body 为 `{ids: [...]}`。
  Future<void> deleteIntroDetail(List<int> ids) async {
    await _dio.post<dynamic>(
      '/company/introDetail/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>[];
  }
}