import 'dart:convert';

import 'package:flutter/foundation.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:isekai_wiki/api/base_api.dart';
import 'package:json_annotation/json_annotation.dart';

import '../global.dart';

part 'site_config.g.dart';

@JsonSerializable()
class SiteConfig {
  List<String> moduleStyles;
  List<String> moduleScripts;
  String renderTheme;
  String renderTemplateUrl;

  String baseUrl;
  String indexUrl;
  String apiUrl;
  String resourceLoaderUrl;
  String restfulApiUrl;
  String pageUrlTemplate;

  bool enableFollowing;

  SiteConfig({
    this.moduleStyles = const [],
    this.moduleScripts = const [],
    this.renderTheme = Global.renderThemeFallback,
    this.renderTemplateUrl = "",
    this.baseUrl = "",
    this.indexUrl = "",
    this.apiUrl = "",
    this.resourceLoaderUrl = "",
    this.restfulApiUrl = "",
    this.pageUrlTemplate = "",
    this.enableFollowing = false,
  });

  factory SiteConfig.fromJson(Map<String, dynamic> json) => _$SiteConfigFromJson(json);

  Map<String, dynamic> toJson() => _$SiteConfigToJson(this);

  void fillUrl() {
    if (indexUrl.isEmpty) {
      indexUrl = "$baseUrl/index.php";
    }

    if (apiUrl.isEmpty) {
      apiUrl = "$baseUrl/api.php";
    }

    if (resourceLoaderUrl.isEmpty) {
      resourceLoaderUrl = "$baseUrl/load.php";
    }

    if (pageUrlTemplate.isEmpty) {
      pageUrlTemplate = "$baseUrl/index.php?title={{title}}";
    }
  }

  bool get restfulApiAvailable {
    return restfulApiUrl.isNotEmpty;
  }
}

class SiteConfigController extends GetxController {
  bool _ignoreSave = false;

  bool isAppActive = false;

  var config = Rx<SiteConfig>(SiteConfig());

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

    loadFromStorage();

    if (isAppActive) {
      // 尝试更新APP配置
      loadFromRemote().catchError((err, stack) {
        if (kDebugMode) {
          print("Cannot update site config: $err");
          stack.printError();
        }
      });
    }
  }

  /// 从本地存储读取
  void loadFromStorage() {
    try {
      final storage = GetStorage();

      isAppActive = storage.read<bool>("appActive") ?? false;

      var siteConfigJson = storage.read<String>("siteConfigCache");
      if (siteConfigJson == null) return;

      var siteConfigObject = jsonDecode(siteConfigJson);
      if (siteConfigObject == null) return;

      var siteConfigData = SiteConfig.fromJson(siteConfigObject);
      loadFromEntity(siteConfigData);
    } catch (ex, stack) {
      if (kDebugMode) {
        print(ex);
        stack.printError();
      }
    } finally {
      _ignoreSave = false;
    }
  }

  /// 缓存到本地存储
  void saveToStorage() {
    if (_ignoreSave) return;

    final storage = GetStorage();

    var siteConfigJson = jsonEncode(config.value);

    storage.write("siteConfigCache", siteConfigJson);

    storage.write("appActive", isAppActive);
  }

  void loadFromEntity(SiteConfig siteConfigData) {
    config.value = siteConfigData;
    Global.siteConfig = config.value;
  }

  Future<void> loadFromRemote() async {
    Uri siteConfigUri = Uri.parse(Global.siteConfigUrl);
    var resMap = await BaseApi.getJson(siteConfigUri);

    var siteConfigData = SiteConfig.fromJson(resMap);
    loadFromEntity(siteConfigData);

    isAppActive = true;
    Global.isAppActive = true;
    saveToStorage();
  }
}