import 'dart:math';
import 'dart:typed_data';

import 'package:dio/dio.dart';
import 'package:fl_clash/common/common.dart';
import 'package:fl_clash/models/ip.dart';
import 'package:fl_clash/state.dart';
import 'package:flutter/cupertino.dart';

class Request {
  late final Dio _dio;
  String? userAgent;

  Request() {
    _dio = Dio();
    _dio.interceptors.add(
      InterceptorsWrapper(
        onRequest: (options, handler) {
          return handler.next(options); // 继续请求
        },
      ),
    );
  }

  Future<Response> getFileResponseForUrl(String url) async {
    final response = await _dio
        .get(
          url,
          options: Options(
            headers: {
              "User-Agent": globalState.appController.clashConfig.globalUa
            },
            responseType: ResponseType.bytes,
          ),
        )
        .timeout(
          httpTimeoutDuration * 6,
        );
    return response;
  }

  Future<MemoryImage?> getImage(String url) async {
    if (url.isEmpty) return null;
    final response = await _dio.get<Uint8List>(
      url,
      options: Options(
        responseType: ResponseType.bytes,
      ),
    );
    final data = response.data;
    if (data == null) return null;
    return MemoryImage(data);
  }

  Future<Map<String, dynamic>?> checkForUpdate() async {
    final response = await _dio.get(
      "https://api.github.com/repos/$repository/releases/latest",
      options: Options(
        responseType: ResponseType.json,
      ),
    );
    if (response.statusCode != 200) return null;
    final data = response.data as Map<String, dynamic>;
    final remoteVersion = data['tag_name'];
    final version = globalState.packageInfo.version;
    final hasUpdate =
        other.compareVersions(remoteVersion.replaceAll('v', ''), version) > 0;
    if (!hasUpdate) return null;
    return data;
  }

  final Map<String, IpInfo Function(Map<String, dynamic>)> _ipInfoSources = {
    "https://ipwho.is/": IpInfo.fromIpwhoIsJson,
    "https://api.ip.sb/geoip/": IpInfo.fromIpSbJson,
    "https://ipapi.co/json/": IpInfo.fromIpApiCoJson,
    "https://ipinfo.io/json/": IpInfo.fromIpInfoIoJson,
  };

  Future<IpInfo?> checkIp({CancelToken? cancelToken}) async {
    for (final source in _ipInfoSources.entries.toList()..shuffle(Random())) {
      try {
        final response = await _dio
            .get<Map<String, dynamic>>(
              source.key,
              cancelToken: cancelToken,
            )
            .timeout(
              httpTimeoutDuration,
            );
        if (response.statusCode == 200 && response.data != null) {
          return source.value(response.data!);
        }
      } catch (e) {
        if (cancelToken?.isCancelled == true) {
          throw "cancelled";
        }
        continue;
      }
    }
    return null;
  }
}

final request = Request();