import 'package:fluent_ui/fluent_ui.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
import 'package:pixes/appdata.dart';
import 'package:pixes/components/loading.dart';
import 'package:pixes/components/page_route.dart';
import 'package:pixes/foundation/app.dart';
import 'package:pixes/network/network.dart';
import 'package:pixes/pages/user_info_page.dart';
import 'package:pixes/utils/translation.dart';

import '../components/animated_image.dart';
import '../components/color_scheme.dart';
import '../components/illust_widget.dart';
import '../foundation/image_provider.dart';

class SearchPage extends StatefulWidget {
  const SearchPage({super.key});

  @override
  State<SearchPage> createState() => _SearchPageState();
}

class _SearchPageState extends State<SearchPage> {
  String text = "";

  int searchType = 0;

  static const searchTypes = [
    "Search artwork",
    "Search novel",
    "Search user",
    "Artwork ID",
    "Artist ID",
    "Novel ID"
  ];

  void search() {
    switch(searchType) {
      case 0:
        context.to(() => SearchResultPage(text));
      case 1:
        // TODO: novel search
      case 2:
        // TODO: user search
      case 3:
        // TODO: artwork id
        throw UnimplementedError();
      case 4:
        context.to(() => UserInfoPage(text));
      case 5:
        // TODO: novel id
        throw UnimplementedError();
    }
  }

  @override
  Widget build(BuildContext context) {
    return ScaffoldPage(
      content: Column(
        children: [
          buildSearchBar(),
          const SizedBox(height: 8,),
          const Expanded(
            child: _TrendingTagsView(),
          )
        ],
      ),
    );
  }

  final optionController = FlyoutController();

  Widget buildSearchBar() {
    return ConstrainedBox(
      constraints: const BoxConstraints(maxWidth: 560),
      child: SizedBox(
        height: 42,
        width: double.infinity,
        child: LayoutBuilder(
          builder: (context, constrains) {
            return SizedBox(
              height: 42,
              width: constrains.maxWidth,
              child: Row(
                children: [
                  Expanded(
                    child: TextBox(
                      placeholder: searchTypes[searchType].tl,
                      onChanged: (s) => text = s,
                      foregroundDecoration: BoxDecoration(
                          border: Border.all(
                              color: ColorScheme.of(context)
                                  .outlineVariant
                                  .withOpacity(0.6)),
                          borderRadius: BorderRadius.circular(4)),
                      suffix: MouseRegion(
                        cursor: SystemMouseCursors.click,
                        child: GestureDetector(
                          onTap: search,
                          child: const Icon(
                            FluentIcons.search,
                            size: 16,
                          ).paddingHorizontal(12),
                        ),
                      ),
                    ),
                  ),
                  const SizedBox(
                    width: 4,
                  ),
                  FlyoutTarget(
                    controller: optionController,
                    child: Button(
                      child: const SizedBox(
                        height: 42,
                        child: Center(
                          child: Icon(FluentIcons.chevron_down),
                        ),
                      ),
                      onPressed: () {
                        optionController.showFlyout(
                          navigatorKey: App.rootNavigatorKey.currentState,
                          builder: buildSearchOption,
                        );
                      },
                    ),
                  ),
                  const SizedBox(width: 4,),
                  Button(
                    child: const SizedBox(
                      height: 42,
                      child: Center(
                        child: Icon(FluentIcons.settings),
                      ),
                    ),
                    onPressed: () {
                      Navigator.of(context).push(SideBarRoute(const SearchSettings()));
                    },
                  )
                ],
              ),
            );
          },
        ),
      ).paddingHorizontal(16),
    );
  }

  Widget buildSearchOption(BuildContext context) {
    return MenuFlyout(
      items: List.generate(
          searchTypes.length,
          (index) => MenuFlyoutItem(
              text: Text(searchTypes[index].tl),
              onPressed: () => setState(() => searchType = index))),
    );
  }
}

class _TrendingTagsView extends StatefulWidget {
  const _TrendingTagsView();

  @override
  State<_TrendingTagsView> createState() => _TrendingTagsViewState();
}

class _TrendingTagsViewState extends LoadingState<_TrendingTagsView, List<TrendingTag>> {
  @override
  Widget buildContent(BuildContext context, List<TrendingTag> data) {
    return MasonryGridView.builder(
      gridDelegate: const SliverSimpleGridDelegateWithMaxCrossAxisExtent(
        maxCrossAxisExtent: 240,
      ),
      itemCount: data.length,
      itemBuilder: (context, index) {
        return buildItem(data[index]);
      },
    );
  }

  Widget buildItem(TrendingTag tag) {
    final illust = tag.illust;

    var text = tag.tag.name;
    if(tag.tag.translatedName != null) {
      text += "/${tag.tag.translatedName}";
    }

    return LayoutBuilder(builder: (context, constrains) {
      final width = constrains.maxWidth;
      final height = illust.height * width / illust.width;
      return Container(
        width: width,
        height: height,
        padding: const EdgeInsets.symmetric(horizontal: 8.0, vertical: 8.0),
        child: Card(
          padding: EdgeInsets.zero,
          margin: EdgeInsets.zero,
          child: MouseRegion(
            cursor: SystemMouseCursors.click,
            child: GestureDetector(
              onTap: (){
                context.to(() => SearchResultPage(tag.tag.name));
              },
              child: Stack(
                children: [
                  Positioned.fill(child: ClipRRect(
                    borderRadius: BorderRadius.circular(4.0),
                    child: AnimatedImage(
                      image: CachedImageProvider(illust.images.first.medium),
                      fit: BoxFit.cover,
                      width: width-16.0,
                      height: height-16.0,
                    ),
                  )),
                  Positioned(
                    bottom: -2,
                    left: 0,
                    right: 0,
                    child: Container(
                      decoration: BoxDecoration(
                        color: FluentTheme.of(context).micaBackgroundColor.withOpacity(0.84),
                        borderRadius: BorderRadius.circular(4)
                      ),
                      child: Text(text).paddingHorizontal(4).paddingVertical(6).paddingBottom(2),
                    ),
                  )
                ],
              ),
            ),
          ),
        ),
      );
    });
  }

  @override
  Future<Res<List<TrendingTag>>> loadData() {
    return Network().getHotTags();
  }
}

class SearchSettings extends StatefulWidget {
  const SearchSettings({super.key});

  @override
  State<SearchSettings> createState() => _SearchSettingsState();
}

class _SearchSettingsState extends State<SearchSettings> {
  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Column(
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 12),
            child: Text("Search Settings".tl, style: const TextStyle(fontSize: 18),),
          ).toAlign(Alignment.centerLeft),
          buildItem(title: "Match".tl, child: DropDownButton(
            title: Text(appdata.searchOptions.matchType.toString()),
            items: KeywordMatchType.values.map((e) =>
              MenuFlyoutItem(
                text: Text(e.toString()),
                onPressed: () => setState(() => appdata.searchOptions.matchType = e)
              )
            ).toList(),
          )),
          buildItem(title: "Favorite number".tl, child: DropDownButton(
            title: Text(appdata.searchOptions.favoriteNumber.toString()),
            items: FavoriteNumber.values.map((e) =>
                MenuFlyoutItem(
                    text: Text(e.toString()),
                    onPressed: () => setState(() => appdata.searchOptions.favoriteNumber = e)
                )
            ).toList(),
          )),
          buildItem(title: "Sort".tl, child: DropDownButton(
            title: Text(appdata.searchOptions.sort.toString()),
            items: SearchSort.values.map((e) =>
                MenuFlyoutItem(
                    text: Text(e.toString()),
                    onPressed: () => setState(() => appdata.searchOptions.sort = e)
                )
            ).toList(),
          )),
          Card(
            padding: EdgeInsets.zero,
            margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
            child: SizedBox(
              width: double.infinity,
              child: Column(
                children: [
                  const Text("Start Time", style: TextStyle(fontSize: 16),)
                      .paddingVertical(8)
                      .toAlign(Alignment.centerLeft)
                      .paddingLeft(16),
                  DatePicker(
                    selected: appdata.searchOptions.startTime,
                    onChanged: (t) => setState(() => appdata.searchOptions.startTime = t),
                  ),
                  const SizedBox(height: 8,)
                ],
              ),
          )),
          Card(
              padding: EdgeInsets.zero,
              margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
              child: SizedBox(
                width: double.infinity,
                child: Column(
                  children: [
                    const Text("End Time", style: TextStyle(fontSize: 16),)
                        .paddingVertical(8)
                        .toAlign(Alignment.centerLeft)
                        .paddingLeft(16),
                    DatePicker(
                      selected: appdata.searchOptions.endTime,
                      onChanged: (t) => setState(() => appdata.searchOptions.endTime = t),
                    ),
                    const SizedBox(height: 8,)
                  ],
                ),
              )),
          buildItem(title: "Age limit".tl, child: DropDownButton(
            title: Text(appdata.searchOptions.ageLimit.toString()),
            items: AgeLimit.values.map((e) =>
                MenuFlyoutItem(
                    text: Text(e.toString()),
                    onPressed: () => setState(() => appdata.searchOptions.ageLimit = e)
                )
            ).toList(),
          )),
        ],
      ),
    );
  }

  Widget buildItem({required String title, required Widget child}) {
    return Card(
      margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
      padding: EdgeInsets.zero,
      child: ListTile(
        title: Text(title),
        trailing: child,
      ),
    );
  }
}


class SearchResultPage extends StatefulWidget {
  const SearchResultPage(this.keyword, {super.key});

  final String keyword;

  @override
  State<SearchResultPage> createState() => _SearchResultPageState();
}

class _SearchResultPageState extends MultiPageLoadingState<SearchResultPage, Illust> {
  @override
  Widget buildContent(BuildContext context, final List<Illust> data) {
    return LayoutBuilder(builder: (context, constrains){
      return MasonryGridView.builder(
        gridDelegate: const SliverSimpleGridDelegateWithMaxCrossAxisExtent(
          maxCrossAxisExtent: 240,
        ),
        itemCount: data.length,
        itemBuilder: (context, index) {
          if(index == data.length - 1){
            nextPage();
          }
          return IllustWidget(data[index]);
        },
      );
    });
  }

  String? nextUrl;

  @override
  Future<Res<List<Illust>>> loadData(page) async{
    if(nextUrl == "end") {
      return Res.error("No more data");
    }
    var res = nextUrl == null
        ? await Network().search(widget.keyword, appdata.searchOptions)
        : await Network().getIllustsWithNextUrl(nextUrl!);
    if(!res.error) {
      nextUrl = res.subData;
      nextUrl ??= "end";
    }
    return res;
  }
}