import 'dart:io';

import 'package:auto_route/auto_route.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:remever/common/resources.dart';
import 'package:remever/common/utils.dart';
import 'package:remever/common/widgets/loose_focus.dart';
import 'package:remever/common/widgets/typography.dart';
import 'package:remever/common/widgets/w_if.dart';
import 'package:remever/common/widgets/wspace.dart';
import 'package:remever/components/extensions/context.dart';
import 'package:remever/components/extensions/state.dart';
import 'package:remever/database/database.dart';
import 'package:remever/gen/assets.gen.dart';
import 'package:remever/inject.dart';
import 'package:remever/router.gr.dart';
import 'package:remever/screens/collections/collections_screen.dart';
import 'package:remever/screens/collections/widgets/collection_progress_bar.dart';
import 'package:remever/services/collection/collections_interface.dart';

@RoutePage()
class CollectionSearchScreen extends StatefulWidget {
  const CollectionSearchScreen({super.key, required this.onCollectionSelect});

  final void Function(Collection) onCollectionSelect;

  @override
  State<CollectionSearchScreen> createState() => _CollectionSearchScreenState();
}

class _CollectionSearchScreenState extends State<CollectionSearchScreen> {
  final TextEditingController _searchController = TextEditingController();

  String? _search;

  @override
  void initState() {
    _searchController.addListener(() {
      safeSetState(() {
        _search = _searchController.text;
      });
    });
    super.initState();
  }

  @override
  void dispose() {
    _searchController.dispose();
    super.dispose();
  }

  void _onCreateTap() {
    context.pushRoute(CrudCollectionRoute());
  }

  @override
  Widget build(BuildContext context) {
    return LooseFocus(
      child: Scaffold(
        backgroundColor: AppColors.bg,
        appBar: _buildAppBar(context),
        body: _buildBody(context),
      ),
    );
  }

  AppBar _buildAppBar(BuildContext context) {
    return AppBar(
      toolbarHeight: 66.h,
      backgroundColor: AppColors.white,
      shadowColor: Colors.transparent,
      title: SizedBox(
        height: 48.h,
        child: DecoratedBox(
          decoration: BoxDecoration(
            color: AppColors.white,
            borderRadius: BorderRadius.circular(12).r,
            border: Border.all(color: AppColors.bg),
          ),
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 12).r,
            child: Center(
              child: TextField(
                autofocus: true,
                controller: _searchController,
                textCapitalization: TextCapitalization.sentences,
                maxLines: 1,
                cursorColor: AppColors.danger,
                decoration: const InputDecoration.collapsed(
                  hintText: 'Поиск',
                  hintStyle: TextStyle(color: AppColors.gray),
                ),
              ),
            ),
          ),
        ),
      ),
      centerTitle: true,
      leading: IconButton(
        onPressed: () async {
          context.back();
        },
        icon: const Icon(CupertinoIcons.left_chevron, color: Colors.black),
      ),
    );
  }

  Widget _buildBody(BuildContext context) {
    return Column(
      children: [
        _buildCreateButton(),
        Expanded(
          child: StreamBuilder<List<Collection>>(
            stream: getIt<CollectionsInterface>().watchCollectionsList(
              search: _search,
            ),
            builder: (context, snapshot) {
              if (snapshot.connectionState == ConnectionState.waiting) {
                return const LoadingList();
              }

              if (snapshot.hasError) {
                return const ErrorList();
              }

              final collections = snapshot.data;
              if (collections == null || collections.isEmpty) {
                return const EmptyList();
              }

              return ListView.builder(
                itemCount: collections.length,
                physics: BouncingScrollPhysics(),
                padding: const EdgeInsets.symmetric(horizontal: 16).r,
                itemBuilder:
                    (context, index) => Padding(
                      padding: const EdgeInsets.only(bottom: 8).r,
                      child: GestureDetector(
                        onTap: () {
                          widget.onCollectionSelect(collections[index]);

                          context.back();
                        },
                        child: _Collection(collection: collections[index]),
                      ),
                    ),
              );
            },
          ),
        ),
      ],
    );
  }

  Padding _buildCreateButton() {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 28).r,
      child: GestureDetector(
        onTap: () => _onCreateTap(),
        child: Row(
          children: [
            SizedBox.square(
              dimension: 20.r,
              child: DecoratedBox(
                decoration: BoxDecoration(
                  color: AppColors.white,
                  shape: BoxShape.circle,
                ),
                child: Center(
                  child: Icon(Icons.add, color: AppColors.disabled, size: 15.r),
                ),
              ),
            ),
            WSpace(4),
            AppTypography('Создать новую коллекцию', type: Regular16px()),
          ],
        ),
      ),
    );
  }
}

class _Collection extends StatelessWidget {
  const _Collection({required this.collection});

  final Collection collection;

  @override
  Widget build(BuildContext context) {
    return Container(
      constraints: BoxConstraints(minHeight: 66.h, maxHeight: 84.h),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(12).r,
        color: AppColors.white,
      ),
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8).r,
      child: Row(
        children: <Widget>[_buildAvatar(), const WSpace(5), _buildInfo()],
      ),
    );
  }

  ///
  /// Построение основной информации
  ///
  Widget _buildInfo() {
    return SizedBox(
      width: 230.w,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          _buildTitle(),
          const HSpace(4),
          Row(
            children: <Widget>[
              Assets.icons.typeCards.image(
                height: 18.h,
                width: 18.w,
                color: AppColors.disabled,
              ),
              const WSpace(2),
              AppTypography(
                '${collection.likesCount.toString()} ${Utils.declOfNum(collection.likesCount, ['карточек', 'карточки', 'карточек'])}',
                type: Regular14px(),
                color: AppColors.disabled,
              ),
            ],
          ),
          const HSpace(6),
          const CollectionProgressBar(),
        ],
      ),
    );
  }

  ///
  /// Название коллекции
  ///
  Widget _buildTitle() {
    return AppTypography(
      collection.title,
      type: Medium16px(),
      maxLines: 2,
      softWrap: true,
    );
  }

  ///
  /// Обложка коллекции
  ///
  Widget _buildAvatar() {
    return SizedBox.square(
      dimension: 50.r,
      child: DecoratedBox(
        decoration: BoxDecoration(shape: BoxShape.circle, color: AppColors.bg),

        child: Wif(
          condition: collection.image != null,
          builder:
              (context) => ClipOval(
                child: Image.file(File(collection.image!), fit: BoxFit.cover),
              ),
          fallback:
              (context) => Center(
                child: AppTypography(
                  collection.title.substring(0, 1),
                  type: Bold34px(),
                ),
              ),
        ),
      ),
    );
  }
}