import 'dart:convert';

import 'package:flutter/foundation.dart';
import 'package:get/get.dart';
import 'package:json_annotation/json_annotation.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../global.dart';

part 'site_config.g.dart';

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

  SiteConfig({
    this.moduleStyles = const [],
    this.moduleScripts = const [],
    this.renderTheme = Global.renderThemeFallback,
  });

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

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

class AppSettingsController extends GetxController {
  bool _ignoreSave = false;

  bool isInit = false;

  List<String> moduleStyles = [];
  List<String> moduleScripts = [];
  String renderTheme = Global.renderThemeFallback;

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

    loadFromStorage();

    if (isInit) {
      // 尝试更新APP配置
      loadFromRemote();
    }
  }

  /// 从本地存储读取
  Future<void> loadFromStorage() async {
    try {
      final prefs = await SharedPreferences.getInstance();
      var siteConfigJson = prefs.getString("siteConfigCache");
      if (siteConfigJson == null) return;

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

      var siteConfigData = SiteConfig.fromJson(siteConfigObject);

      moduleScripts = siteConfigData.moduleScripts;
      moduleStyles = siteConfigData.moduleStyles;
      renderTheme = siteConfigData.renderTheme;
    } catch (ex) {
      if (kDebugMode) {
        print(ex);
      }
    } finally {
      _ignoreSave = false;
    }
  }

  Future<void> loadFromRemote() async {}

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

    final prefs = Global.sharedPreferences!;

    var siteConfigData = SiteConfig(
      moduleScripts: moduleScripts,
      moduleStyles: moduleStyles,
      renderTheme: renderTheme,
    );

    var siteConfigJson = jsonEncode(siteConfigData.toJson());

    prefs.setString("siteConfigCache", siteConfigJson);
  }
}