import 'package:e2ee_chat/routes/home.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:provider/single_child_widget.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import 'common/global.dart';
import 'models/locale_model.dart';
import 'models/theme_model.dart';
import 'models/user_model.dart';
import 'routes/language_route.dart';
import 'routes/login.dart';
import 'routes/theme_change.dart';

void main() {
  Global.init().then((e) => runApp(MyApp()));
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: <SingleChildWidget>[
        ChangeNotifierProvider.value(value: ThemeModel()),
        ChangeNotifierProvider.value(value: UserModel()),
        ChangeNotifierProvider.value(value: LocaleModel()),
      ],
      child: Consumer2<ThemeModel, LocaleModel>(
        builder: (BuildContext context, themeModel, localeModel, Widget? child) {
          return MaterialApp(
            theme: ThemeData(
              primarySwatch: themeModel.theme,
            ),
            onGenerateTitle: (context){
              return GmLocalizations.of(context).title;
            },
            home: HomeRoute(), //应用主页
            locale: localeModel.getLocale(),
            //我们只支持美国英语和中文简体
            supportedLocales: [
              const Locale('en', 'US'), // 美国英语
              const Locale('zh', 'CN'), // 中文简体
              //其它Locales
            ],
            localizationsDelegates: [
              // 本地化的代理类
              GlobalMaterialLocalizations.delegate,
              GlobalWidgetsLocalizations.delegate,
              GmLocalizationsDelegate()
            ],
            localeResolutionCallback:
                (Locale? _locale, Iterable<Locale> supportedLocales) {
              if (localeModel.getLocale() != null) {
                //如果已经选定语言，则不跟随系统
                return localeModel.getLocale();
              } else {

                Locale? locale;
                //APP语言跟随系统语言，如果系统语言不是中文简体或美国英语，
                //则默认使用美国英语
                if (supportedLocales.contains(_locale)) {
                  locale = _locale;
                } else {
                  locale = Locale('en', 'US');
                }
                return locale;
              }
            },
            // 注册命名路由表
            routes: <String, WidgetBuilder>{
              "login": (context) => LoginRoute(),
              "themes": (context) => ThemeChangeRoute(),
              "language": (context) => LanguageRoute(),
            },
          );
        },
      ),
    );
  }
}