import 'package:dio/dio.dart';

import '../core/network/api_client.dart';
import '../core/network/endpoints.dart';

/// 上传发布服务（《03-接口文档》5.5 / 5.6 / 5.8）
/// 开发环境链路：upload/token（server 中转模式）→ upload/file（multipart）→ 发布
class UploadService {
  UploadService._();

  /// 5.8 分类列表（发布时选择）
  static Future<List<VideoCategory>> fetchCategories() async {
    final data = await ApiClient.get<List<dynamic>>(Endpoints.categories);
    return data
        .whereType<Map<String, dynamic>>()
        .map(VideoCategory.fromJson)
        .toList();
  }

  /// 5.5 获取上传凭证（开发环境返回 server 中转模式）
  static Future<UploadTokenInfo> fetchUploadToken({
    required String fileName,
    required int fileSize,
  }) async {
    final data = await ApiClient.post<Map<String, dynamic>>(
      Endpoints.uploadToken,
      data: {'file_name': fileName, 'file_size': fileSize},
    );
    return UploadTokenInfo.fromJson(data);
  }

  /// 5.5 配套：multipart 中转上传（字段 object_key + file）
  static Future<UploadFileResult> uploadFile({
    required String objectKey,
    required String filePath,
    required String fileName,
    void Function(int sent, int total)? onProgress,
  }) async {
    final data = await ApiClient.post<Map<String, dynamic>>(
      Endpoints.uploadFile,
      data: FormData.fromMap({
        'object_key': objectKey,
        'file': await MultipartFile.fromFile(filePath, filename: fileName),
      }),
      onSendProgress: onProgress,
    );
    return UploadFileResult.fromJson(data);
  }

  /// 5.6 发布视频
  static Future<PublishResult> publish({
    required String objectKey,
    required String title,
    String description = '',
    required int categoryId,
    List<String> tags = const [],
  }) async {
    final data = await ApiClient.post<Map<String, dynamic>>(
      Endpoints.publish,
      data: {
        'object_key': objectKey,
        'title': title,
        'description': description,
        'category_id': categoryId,
        'tags': tags,
      },
    );
    return PublishResult.fromJson(data);
  }
}

/// 视频分类
class VideoCategory {
  VideoCategory({required this.categoryId, required this.name});

  final int categoryId;
  final String name;

  factory VideoCategory.fromJson(Map<String, dynamic> json) => VideoCategory(
        categoryId: (json['category_id'] as num?)?.toInt() ?? 0,
        name: (json['name'] as String?) ?? '',
      );
}

/// 上传凭证（server 中转模式）
class UploadTokenInfo {
  UploadTokenInfo({
    required this.uploadType,
    required this.objectKey,
    required this.uploadUrl,
  });

  final String uploadType; // server / oss_sts
  final String objectKey;
  final String uploadUrl;

  factory UploadTokenInfo.fromJson(Map<String, dynamic> json) =>
      UploadTokenInfo(
        uploadType: (json['upload_type'] as String?) ?? '',
        objectKey: (json['object_key'] as String?) ?? '',
        uploadUrl: (json['upload_url'] as String?) ?? '',
      );
}

/// 中转上传结果
class UploadFileResult {
  UploadFileResult({
    required this.objectKey,
    required this.url,
    required this.fileSize,
  });

  final String objectKey;
  final String url;
  final int fileSize;

  factory UploadFileResult.fromJson(Map<String, dynamic> json) =>
      UploadFileResult(
        objectKey: (json['object_key'] as String?) ?? '',
        url: (json['url'] as String?) ?? '',
        fileSize: (json['file_size'] as num?)?.toInt() ?? 0,
      );
}

/// 发布结果
class PublishResult {
  PublishResult({
    required this.videoId,
    required this.status,
    required this.statusText,
    required this.isPriority,
  });

  final int videoId;
  final int status; // 0转码中 1待审核 2已发布 3拒绝 4下架 5转码失败
  final String statusText;
  final bool isPriority; // 会员优先转码

  factory PublishResult.fromJson(Map<String, dynamic> json) => PublishResult(
        videoId: (json['video_id'] as num?)?.toInt() ?? 0,
        status: (json['status'] as num?)?.toInt() ?? 0,
        statusText: (json['status_text'] as String?) ?? '',
        isPriority: (json['is_priority'] as bool?) ?? false,
      );
}