import 'package:PiliPlus/common/widgets/loading_widget/http_error.dart';
import 'package:PiliPlus/common/widgets/scaffold.dart';
import 'package:PiliPlus/common/widgets/sliver_wrap.dart';
import 'package:PiliPlus/http/loading_state.dart';
import 'package:PiliPlus/models_new/search/search_rcmd/data.dart';
import 'package:PiliPlus/pages/search/controller.dart';
import 'package:PiliPlus/pages/search/widgets/hot_keyword.dart';
import 'package:PiliPlus/pages/search/widgets/search_text.dart';
import 'package:PiliPlus/utils/em.dart' show Em;
import 'package:PiliPlus/utils/extension/size_ext.dart';
import 'package:PiliPlus/utils/utils.dart';
import 'package:flutter/material.dart' hide LayoutBuilder;
import 'package:get/get.dart';

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

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

class _SearchPageState extends State<SearchPage> {
  final _tag = Utils.generateRandomString(6);
  late final SSearchController _searchController;
  late ThemeData theme;
  late bool isPortrait;
  late EdgeInsets padding;

  @override
  void initState() {
    super.initState();
    _searchController = Get.put(
      SSearchController(_tag),
      tag: _tag,
    );
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    theme = Theme.of(context);
    padding = MediaQuery.viewPaddingOf(context);
    isPortrait = MediaQuery.sizeOf(context).isPortrait;
  }

  @override
  Widget build(BuildContext context) {
    final trending = _buildHotSearch();
    return scaffold(
      appBar: _buildAppBar,
      body: Padding(
        padding: .only(left: padding.left, right: padding.right),
        child: CustomScrollView(
          slivers: [
            _buildSearchSuggest(),
            if (isPortrait) ...[
              trending,
              _buildHistory,
            ] else
              SliverCrossAxisGroup(
                slivers: [trending, _buildHistory],
              ),
            SliverPadding(padding: .only(bottom: padding.bottom)),
          ],
        ),
      ),
    );
  }

  PreferredSizeWidget get _buildAppBar => AppBar(
    shape: Border(
      bottom: BorderSide(
        color: theme.dividerColor.withValues(alpha: 0.08),
        width: 1,
      ),
    ),
    actions: [
      Obx(
        () => _searchController.showUidBtn.value
            ? IconButton(
                tooltip: 'UID搜索用户',
                icon: const Icon(Icons.person_outline, size: 22),
                onPressed: () => Get.toNamed(
                  '/member?mid=${_searchController.controller.text}',
                ),
              )
            : const SizedBox.shrink(),
      ),
      IconButton(
        tooltip: '清空',
        icon: const Icon(Icons.clear, size: 22),
        onPressed: _searchController.onClear,
      ),
      IconButton(
        tooltip: '搜索',
        onPressed: _searchController.submit,
        icon: const Icon(Icons.search, size: 22),
      ),
      const SizedBox(width: 10),
    ],
    title: TextField(
      autofocus: true,
      focusNode: _searchController.searchFocusNode,
      controller: _searchController.controller,
      textInputAction: TextInputAction.search,
      onChanged: _searchController.onChange,
      decoration: InputDecoration(
        visualDensity: .standard,
        hintText: _searchController.hintText ?? '搜索',
        border: InputBorder.none,
      ),
      onSubmitted: (value) => _searchController.submit(),
    ),
  );

  Widget _buildSearchSuggest() {
    return Obx(() {
      final list = _searchController.searchSuggestList;
      return list.isNotEmpty &&
              list.first.term != null &&
              _searchController.controller.text != ''
          ? SliverList.list(
              children: list
                  .map(
                    (item) => InkWell(
                      borderRadius: const .all(.circular(4)),
                      onTap: () => _searchController.onClickKeyword(item.term!),
                      child: Padding(
                        padding: const .only(left: 20, top: 9, bottom: 9),
                        child: Text.rich(
                          TextSpan(
                            children: Em.regTitle(item.textRich)
                                .map(
                                  (e) => TextSpan(
                                    text: e.text,
                                    style: e.isEm
                                        ? TextStyle(
                                            fontWeight: FontWeight.bold,
                                            color: Theme.of(
                                              context,
                                            ).colorScheme.primary,
                                          )
                                        : null,
                                  ),
                                )
                                .toList(),
                          ),
                        ),
                      ),
                    ),
                  )
                  .toList(),
            )
          : const SliverToBoxAdapter();
    });
  }

  Widget _buildHotSearch() {
    final text = Text(
      '大家都在搜',
      strutStyle: const StrutStyle(leading: 0, height: 1),
      style: theme.textTheme.titleMedium!.copyWith(
        height: 1,
        fontWeight: FontWeight.bold,
      ),
    );
    final outline = theme.colorScheme.outline;
    final secondary = theme.colorScheme.secondary;
    final style = TextStyle(
      height: 1,
      fontSize: 13,
      color: outline,
    );
    return SliverPadding(
      padding: EdgeInsets.fromLTRB(
        10,
        isPortrait ? 4 : 25,
        4,
        25,
      ),
      sliver: SliverMainAxisGroup(
        slivers: [
          SliverPadding(
            padding: const EdgeInsets.fromLTRB(6, 0, 6, 6),
            sliver: SliverToBoxAdapter(
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      text,
                      const SizedBox(width: 14),
                      TextButton(
                        style: const ButtonStyle(
                          visualDensity: .compact,
                          tapTargetSize: .shrinkWrap,
                          padding: WidgetStatePropertyAll(
                            .symmetric(horizontal: 10),
                          ),
                        ),
                        onPressed: () => Get.toNamed('/searchTrending'),
                        child: Row(
                          children: [
                            Text(
                              '完整榜单',
                              strutStyle: const StrutStyle(
                                leading: 0,
                                height: 1,
                              ),
                              style: style,
                            ),
                            Icon(
                              size: 18,
                              Icons.keyboard_arrow_right,
                              color: outline,
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                  TextButton.icon(
                    style: const ButtonStyle(
                      visualDensity: .compact,
                      tapTargetSize: .shrinkWrap,
                      padding: WidgetStatePropertyAll(
                        .symmetric(horizontal: 10),
                      ),
                    ),
                    onPressed: _searchController.queryTrendingList,
                    icon: Icon(
                      Icons.refresh_outlined,
                      size: 18,
                      color: secondary,
                    ),
                    label: Text(
                      '刷新',
                      strutStyle: const StrutStyle(leading: 0, height: 1),
                      style: TextStyle(
                        height: 1,
                        color: secondary,
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
          Obx(
            () => _buildHotKey(_searchController.trendingState.value),
          ),
        ],
      ),
    );
  }

  late final mainAxisExtent = 16 + MediaQuery.textScalerOf(context).scale(14);
  Widget get _buildHistory {
    return Obx(
      () {
        final list = _searchController.historyList;
        if (list.isEmpty) {
          return const SliverToBoxAdapter();
        }
        final secondary = theme.colorScheme.secondary;
        return SliverPadding(
          padding: EdgeInsets.fromLTRB(
            10,
            !isPortrait ? 25 : 0,
            6,
            25,
          ),
          sliver: SliverMainAxisGroup(
            slivers: [
              SliverPadding(
                padding: const EdgeInsets.fromLTRB(6, 0, 6, 6),
                sliver: SliverToBoxAdapter(
                  child: Row(
                    mainAxisAlignment: .spaceBetween,
                    children: [
                      Text(
                        '搜索历史',
                        strutStyle: const StrutStyle(leading: 0, height: 1),
                        style: theme.textTheme.titleMedium!.copyWith(
                          height: 1,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      TextButton.icon(
                        style: const ButtonStyle(
                          visualDensity: .compact,
                          tapTargetSize: .shrinkWrap,
                          padding: WidgetStatePropertyAll(
                            .symmetric(horizontal: 10),
                          ),
                        ),
                        onPressed: _searchController.onClearHistory,
                        icon: Icon(
                          Icons.clear_all_outlined,
                          size: 18,
                          color: secondary,
                        ),
                        label: Text(
                          '清空',
                          style: TextStyle(
                            height: 1,
                            color: secondary,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              SliverFixedWrap(
                mainAxisExtent: mainAxisExtent,
                spacing: 8,
                runSpacing: 8,
                delegate: SliverChildBuilderDelegate(
                  addAutomaticKeepAlives: false,
                  addRepaintBoundaries: false,
                  childCount: list.length,
                  (context, index) => SearchText(
                    text: list[index],
                    onTap: _searchController.onClickKeyword,
                    onLongPress: _searchController.onLongSelect,
                    fontSize: 14,
                    height: 1,
                    padding: const EdgeInsets.symmetric(
                      horizontal: 11,
                      vertical: 8,
                    ),
                  ),
                ),
              ),
            ],
          ),
        );
      },
    );
  }

  Widget _buildHotKey(
    LoadingState<SearchRcmdData> loadingState,
  ) {
    return switch (loadingState) {
      Success(:final response) when (response.list?.isNotEmpty ?? false) =>
        SliverHotKeyword(
          hotSearchList: response.list!,
          onClick: _searchController.onClickKeyword,
        ),
      Error(:final errMsg) => HttpError(
        safeArea: false,
        errMsg: errMsg,
        onReload: _searchController.queryTrendingList,
      ),
      _ => const SliverToBoxAdapter(),
    };
  }
}