PMU_2024/lib/presentation/home_page/home_page.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:pmu/components/utils/debounce.dart';
import 'package:pmu/data/repositories/bbc_repository.dart';
import 'package:pmu/data/repositories/mock_repository.dart';
import 'package:pmu/domain/models/card.dart';
import 'package:pmu/presentation/details_page/details_page.dart';
import 'package:pmu/presentation/dialogs/show_dialog.dart';
import 'package:pmu/presentation/home_page/bloc/bloc.dart';
import 'package:pmu/presentation/home_page/bloc/events.dart';
import 'package:pmu/presentation/home_page/bloc/state.dart';

part 'card.dart';

class MyHomePage extends StatefulWidget {
  //const MyHomePage({super.key, required this.title});

  //final String title;
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: _Body(),
    );
  }
}

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

  @override
  State<_Body> createState() => _BodyState();
}

class _BodyState extends State<_Body> {
  final searchController = TextEditingController();
  final scrollController = ScrollController();

  // late Future<List<CardData>?> data;
  // final repo = BbcRepository();
  @override
  void initState() {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      context.read<HomeBloc>().add(const HomeLoadDataEvent());
    });
    //data = repo.loadData(onError: (e) => showErrorDialog(context, error: e));
    scrollController.addListener(_onNextPageListener);
    super.initState();
  }

  void _onNextPageListener() {
    if (scrollController.offset > scrollController.position.maxScrollExtent) {
      // preventing multiple pagination request on multiple swipes
      final bloc = context.read<HomeBloc>();
      if (!bloc.state.isPaginationLoading) {
        bloc.add(HomeLoadDataEvent(
          search: searchController.text,
          nextPage: bloc.state.data?.nextPage,
        ));
      }
    }
  }

  void dispose() {
    searchController.dispose();
    scrollController.dispose();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    //final data = BbcRepository().loadData();
    return Padding(
      padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top),
      child: Column(children: [
        Padding(
          padding: const EdgeInsets.all(12.0),
          child: CupertinoSearchTextField(
            controller: searchController,
            onChanged: (search) {
              Debounce.run(() => context
                  .read<HomeBloc>()
                  .add(HomeLoadDataEvent(search: search)));
            },
          ),
        ),
        BlocBuilder<HomeBloc, HomeState>(
          builder: (context, state) => state.error != null
              ? Text(
                  state.error ?? '',
                  style: Theme.of(context)
                      .textTheme
                      .headlineSmall
                      ?.copyWith(color: Colors.red),
                )
              : state.isLoading
                  ? const CircularProgressIndicator()
                  : Expanded(
                      child: RefreshIndicator(
                        onRefresh: _onRefresh,
                        child: ListView.builder(
                          controller: scrollController,
                          padding: EdgeInsets.zero,
                          itemCount: state.data?.data?.length ?? 0,
                          itemBuilder: (context, index) {
                            final data = state.data?.data?[index];
                            return data != null
                                ? _Card.fromData(
                                    data,
                                    onLike: (title, isLiked) =>
                                        _showSnackBar(context, title, isLiked),
                                    onTap: () => _navToDetails(context, data),
                                  )
                                : const SizedBox.shrink();
                          },
                        ),
                      ),
                    ),
        ),
        BlocBuilder<HomeBloc, HomeState>(
          builder: (context, state) => state.isPaginationLoading
              ? const CircularProgressIndicator()
              : const SizedBox.shrink(),
        ),
      ]),
    );
  }

  void _showSnackBar(BuildContext context, String title, bool isLiked) {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
        content: Text(
          'The New $title ${isLiked ? 'liked!' : 'disliked'}',
          style: Theme.of(context).textTheme.bodyLarge,
        ),
        backgroundColor: Colors.lightBlue,
        duration: const Duration(seconds: 1),
      ));
    });
  }

  void _navToDetails(BuildContext context, CardData data) {
    Navigator.push(
      context,
      CupertinoPageRoute(builder: (context) => DetailsPage(data)),
    );
  }

  Future<void> _onRefresh() {
    context
        .read<HomeBloc>()
        .add(HomeLoadDataEvent(search: searchController.text));
    return Future.value(null);
  }
}