import 'dart:io';

import 'package:auto_route/auto_route.dart';
import 'package:eitc_erm_dental_flutter/app_router.gr.dart';
import 'package:eitc_erm_dental_flutter/entity/history_item_info.dart';
import 'package:eitc_erm_dental_flutter/funcs.dart';
import 'package:eitc_erm_dental_flutter/pages/history/vm/history_view_model.dart';
import 'package:eitc_erm_dental_flutter/pages/history/widget/history_item_view.dart';
import 'package:eitc_erm_dental_flutter/widget/main_button.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

///历史记录页面
@RoutePage(name: "historyRoute")
class HistoryPage extends ConsumerStatefulWidget {
  const HistoryPage({super.key});

  @override
  ConsumerState createState() => _HistoryPageState();
}

class _HistoryPageState extends ConsumerState<HistoryPage> {
  //照片列表
  final List<HistoryItemInfo> _photoList = [];

  //视频列表
  final List<HistoryItemInfo> _videoList = [];

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
        canPop: false,
        onPopInvokedWithResult: _onPop,
        child: Scaffold(
          appBar: _getAppBar(context),
          body: Padding(
            padding: EdgeInsets.symmetric(horizontal: 16.w),
            child: Column(
              children: [
                _getSelectedCount(context),
                Expanded(child: _getListWidget(context)),
                _getBottomButtons(context),
                SizedBox(
                  height: 5.h,
                )
              ],
            ),
          ),
        ));
  }

  ///pop拦截
  void _onPop(bool didPop, _) {
    if (didPop) {
      return;
    }
    if (ref.read(historySelectModeProvider)) {
      _setSelectMode(false);
      return;
    }
    Navigator.pop(context);
  }

  ///获取appbar
  AppBar _getAppBar(BuildContext context) {
    return AppBar(
      centerTitle: true,
      forceMaterialTransparency: true,
      title: Text(getS().history),
      leading: IconButton(
          onPressed: () {
            Navigator.pop(context);
          },
          icon: Icon(
              Platform.isIOS ? Icons.arrow_back_ios_new : Icons.arrow_back)),
      actions: [
        PopupMenuButton(
            icon: const Icon(Icons.menu),
            //弹出菜单背景色
            color: const Color(0xFF383838),
            //背景形状
            shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(8.r)),
            itemBuilder: (ctx) {
              return [
                PopupMenuItem(
                  child: SizedBox(
                    width: double.infinity,
                    child: Text(
                      getS().byTime,
                      textAlign: TextAlign.center,
                      style: const TextStyle(color: Colors.white),
                    ),
                  ),
                  onTap: () => _updateListType(0),
                ),
                PopupMenuItem(
                  child: SizedBox(
                    width: double.infinity,
                    child: Text(
                      getS().byCategory,
                      textAlign: TextAlign.center,
                      style: const TextStyle(color: Colors.white),
                    ),
                  ),
                  onTap: () => _updateListType(1),
                )
              ];
            }),
      ],
    );
  }

  ///更新列表类型
  void _updateListType(int type) {
    if (ref.read(historyViewTypeProvider) == type) {
      return;
    }
    ref.read(historyViewTypeProvider.notifier).setType(type);
  }

  ///获取已选择数量widget
  Widget _getSelectedCount(BuildContext context) {
    return Consumer(builder: (ctx, ref, _) {
      bool isSelectedMode = ref.watch(historySelectModeProvider);
      Color primaryColor = Theme.of(context).colorScheme.primary;
      //如果不用Visibility的方式,当进入选择模式时,GridView会滚到最上面
      return Visibility(
          visible: isSelectedMode,
          child: Row(
            children: [
              Consumer(builder: (_, tref, __) {
                int count = tref.watch(historySelectedCountProvider);
                return Text(getS().hasSelectCountItem(count));
              }),
              SizedBox(
                width: 6.w,
              ),
              ElevatedButton(
                  onPressed: () => _setSelectMode(false),
                  style: ButtonStyle(
                      minimumSize: const WidgetStatePropertyAll(Size.zero),
                      padding: WidgetStatePropertyAll(EdgeInsets.symmetric(
                          horizontal: 15.w, vertical: 4.h)),
                      elevation: const WidgetStatePropertyAll(0.0),
                      backgroundColor:
                          const WidgetStatePropertyAll(Color(0xFFCEDCF0))),
                  child: Row(
                    children: [
                      Text(
                        getS().cancel,
                        style: TextStyle(color: primaryColor, fontSize: 12.sp),
                      ),
                      SizedBox(
                        width: 5.w,
                      ),
                      Icon(Icons.close, size: 18.r, color: primaryColor)
                    ],
                  )),
              const Spacer(),
              SizedBox(
                  width: 25.w,
                  child: Consumer(builder: (_, cref, __) {
                    int count = cref.watch(historySelectedCountProvider);
                    return Checkbox(
                        value: count ==
                            (cref
                                    .read(historyListProvider)
                                    .value
                                    ?.getMergedList(false)
                                    .length ??
                                0),
                        shape: const CircleBorder(),
                        onChanged: (bo) => cref
                            .read(historyListProvider.notifier)
                            .selectAll(bo ?? false));
                  })),
              Text(getS().selectAll),
              SizedBox(
                width: 5.w,
              ),
            ],
          ));
    });
  }

  Widget _getLoading() {
    return Center(
      child: Row(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Icon(
            Icons.downloading,
            size: 35.r,
          ),
          SizedBox(
            width: 10.w,
          ),
          Text(
            getS().loadingHistories,
          )
        ],
      ),
    );
  }

  Widget _getEmpty() {
    return Center(
      child: Row(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Icon(
            Icons.sentiment_dissatisfied,
            size: 35.r,
          ),
          SizedBox(
            width: 10.w,
          ),
          Text(
            getS().noHistories,
          )
        ],
      ),
    );
  }

  Widget _getListWidget(BuildContext context) {
    return Consumer(builder: (ctx, ref, _) {
      AsyncValue<HistoryListData> value = ref.watch(historyListProvider);
      int viewType = ref.watch(historyViewTypeProvider);
      return switch (value) {
        AsyncData<HistoryListData>(value: var data) => data.isEmpty
            ? _getEmpty()
            : (viewType == 0 ? _getTimeList(data) : _getTypeList(ctx, data)),
        _ => _getLoading()
      };
    });
  }

  ///获取按时间列表
  Widget _getTimeList(HistoryListData data) {
    return _getGridView(data.getMergedList(true));
  }

  ///获取按类型列表
  Widget _getTypeList(BuildContext context, HistoryListData data) {
    return SingleChildScrollView(
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            getS().photo,
            style: Theme.of(context).textTheme.titleMedium,
          ),
          SizedBox(
            height: 10.h,
          ),
          _getGridView(data.photoList, shinkWarp: true, scrollable: false),
          SizedBox(
            height: 10.h,
          ),
          Text(
            getS().video,
            style: Theme.of(context).textTheme.titleMedium,
          ),
          SizedBox(
            height: 10.h,
          ),
          _getGridView(data.videoList, shinkWarp: true, scrollable: false)
        ],
      ),
    );
  }

  ///获取GridView
  Widget _getGridView(List<HistoryItemInfo> list,
      {bool shinkWarp = false, bool scrollable = true}) {
    return GridView.builder(
      shrinkWrap: shinkWarp,
      physics: scrollable
          ? const ClampingScrollPhysics()
          : const NeverScrollableScrollPhysics(),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 2,
          childAspectRatio: 164.0 / 120.0,
          mainAxisSpacing: 8.r,
          crossAxisSpacing: 15.r),
      itemBuilder: (ctx, index) {
        HistoryItemInfo item = list[index];
        return GestureDetector(
          child: HistoryItemView(
            index: index,
            name: item.name,
            path: item.path,
            type: item.type,
          ),
          onTap: () => _onTap(ctx, item),
          onLongPress: () => _onLongPress(ctx, item),
        );
      },
      itemCount: list.length,
    );
  }

  ///点击
  void _onTap(BuildContext context, HistoryItemInfo info) async {
    if (ref.read(historySelectModeProvider)) {
      ref.read(historyListProvider.notifier).select(info, !info.isSelected);
      return;
    }
    await context.pushRoute(info.type == 0
        ? PhotoViewRoute(info: info)
        : VideoPlayerRoute(info: info));
  }

  ///长按
  void _onLongPress(BuildContext context, HistoryItemInfo info) {
    if (ref.read(historySelectModeProvider)) {
      return;
    }
    _setSelectMode(true);
    ref.read(historyListProvider.notifier).select(info, true);
  }

  ///设置选择模式
  void _setSelectMode(bool isSelectMode) {
    ref.read(historySelectModeProvider.notifier).setSelectMode(isSelectMode);
  }

  ///获取选择的条目
  List<HistoryItemInfo> _getSelectedItems() {
    return ref.read(historyListProvider.notifier).getSelectedItems();
  }

  ///获取底部按钮
  Widget _getBottomButtons(BuildContext context) {
    bool isSelectedMode = ref.watch(historySelectModeProvider);
    //如果不用Visibility的方式,当进入选择模式时,GridView会滚到最上面
    return Visibility(
        visible: isSelectedMode,
        child: Row(
          children: [
            Expanded(
              child: MainButton(
                  text: getS().upload, onPressed: () => _onUpload(context)),
            ),
            SizedBox(
              width: 15.w,
            ),
            Expanded(
                child: MainButton(
              text: getS().delete,
              onPressed: () => _onDelete(context),
              isOutlined: true,
            )),
          ],
        ));
  }

  ///上传
  void _onUpload(BuildContext context) async {
    if (!await checkInternetWifi()) {
      return;
    }
    List<HistoryItemInfo> list = _getSelectedItems();
    if (list.isEmpty) {
      showToast(text: getS().pleaseSelectToUpload);
      return;
    }
    if (context.mounted) {
      context.pushRoute(
          UploadSelectClinicRoute(uploadList: list, isFromView: false));
    }
  }

  ///删除
  void _onDelete(BuildContext context) async {
    List<HistoryItemInfo> list = _getSelectedItems();
    if (list.isEmpty) {
      showToast(text: getS().pleaseSelectToDelete);
      return;
    }
    bool? bo = await showDeleteAlertDialog(
        context, getS().deleteMultiHint(list.length));
    if (bo == null || !bo) {
      return;
    }

    bool result = await ref.read(historyListProvider.notifier).delete(list);
    showToast(text: result ? getS().deleteSuccess : getS().deleteFailed);
  }
}