import 'package:fluent_reader_lite/components/list_tile_group.dart';
import 'package:fluent_reader_lite/components/my_list_tile.dart';
import 'package:fluent_reader_lite/generated/l10n.dart';
import 'package:fluent_reader_lite/models/global_model.dart';
import 'package:fluent_reader_lite/utils/colors.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:provider/provider.dart';
import 'package:tuple/tuple.dart';

class GeneralPage extends StatefulWidget {
  @override
  _GeneralPageState createState() => _GeneralPageState();
}

class _GeneralPageState extends State<GeneralPage> {
  bool _clearingCache = false;
  double textScale;

  void _clearCache() async {
    setState(() { _clearingCache = true; });
    await DefaultCacheManager().emptyCache();
    if (!mounted) return;
    setState(() { _clearingCache = false; });
  }

  @override
  Widget build(BuildContext context) => CupertinoPageScaffold(
    backgroundColor: MyColors.background,
    navigationBar: CupertinoNavigationBar(
      middle: Text(S.of(context).general),
    ),
    child: Consumer<GlobalModel>(
      builder: (context, globalModel, child) {
        final useSystemTextScale = globalModel.textScale == null;
        final textScaleItems = ListTileGroup([
          MyListTile(
            title: Text(S.of(context).followSystem),
            trailing: CupertinoSwitch(
              value: useSystemTextScale,
              onChanged: (v) {
                textScale = null;
                globalModel.textScale = v ? null : 1;
              },
            ),
            trailingChevron: false,
            withDivider: !useSystemTextScale,
          ),
          if (!useSystemTextScale) MyListTile(
            title: Expanded(child: CupertinoSlider(
              min: 0.5,
              max: 1.5,
              divisions: 8,
              value: textScale ?? globalModel.textScale,
              onChanged: (v) {
                setState(() { textScale = v; });
              },
              onChangeEnd: (v) {
                textScale = null;
                globalModel.textScale = v;
              },
            )),
            trailingChevron: false,
            withDivider: false,
          ),
        ], title: S.of(context).fontSize);
        final syncItems = ListTileGroup([
          MyListTile(
            title: Text(S.of(context).syncOnStart),
            trailing: CupertinoSwitch(
              value: globalModel.syncOnStart,
              onChanged: (v) {
                globalModel.syncOnStart = v;
                setState(() {});
              },
            ),
            trailingChevron: false,
          ),
          MyListTile(
            title: Text(S.of(context).inAppBrowser),
            trailing: CupertinoSwitch(
              value: globalModel.inAppBrowser,
              onChanged: (v) {
                globalModel.inAppBrowser = v;
                setState(() {});
              },
            ),
            trailingChevron: false,
            withDivider: false,
          ),
        ], title: S.of(context).preferences);
        final storageItems = ListTileGroup([
          MyListTile(
            title: Text(S.of(context).clearCache),
            onTap: _clearingCache ? null : _clearCache,
            trailing: _clearingCache ? CupertinoActivityIndicator() : null,
            trailingChevron: !_clearingCache,
          ),
          MyListTile(
            title: Text(S.of(context).autoDelete),
            trailing: Text(S.of(context).daysAgo(globalModel.keepItemsDays)),
            trailingChevron: false,
            withDivider: false,
          ),
          MyListTile(
            title: Expanded(child: CupertinoSlider(
              min: 1,
              max: 4,
              divisions: 3,
              value: (globalModel.keepItemsDays ~/ 7).toDouble(),
              onChanged: (v) { 
                globalModel.keepItemsDays = (v * 7).toInt(); 
                setState(() { });
              },
            )),
            trailingChevron: false,
            withDivider: false,
          ),
        ], title: S.of(context).storage);
        final themeItems = ListTileGroup.fromOptions(
          [
            Tuple2(S.of(context).followSystem, ThemeSetting.Default),
            Tuple2(S.of(context).light, ThemeSetting.Light),
            Tuple2(S.of(context).dark, ThemeSetting.Dark),
          ],
          globalModel.theme,
          (t) { globalModel.theme = t; },
          title: S.of(context).theme,
        );
        final localeItems = ListTileGroup.fromOptions(
          [
            Tuple2(S.of(context).followSystem, null),
            Tuple2("English", Locale("en")),
            Tuple2("中文（简体）", Locale("zh")),
          ],
          globalModel.locale,
          (l) { globalModel.locale = l; },
          title: S.of(context).language,
        );
        return ListView(
          children: [
            syncItems,
            textScaleItems,
            storageItems,
            themeItems,
            localeItems,
          ],
        );
      },
    ),
  );
}