// ignore: import_of_legacy_library_into_null_safe
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

import 'question.dart';

class MyHomePage extends HookConsumerWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('StackOverflow'),
      ),
      body: HookConsumer(builder: (context, ref, child) {
        final count = ref.watch(questionsCountProvider);

        return count.when(
          loading: () => const Center(
            child: CircularProgressIndicator(),
          ),
          error: (err, stack) {
            if (err is DioError) {
              return Text(
                err.response!.data.toString(),
              );
            }
            return Text('Error $err\n$stack');
          },
          data: (count) {
            return RefreshIndicator(
              onRefresh: () {
                ref.refresh(paginatedQuestionsProvider(0));
                return ref.read(paginatedQuestionsProvider(0).future);
              },
              child: ListView.separated(
                itemCount: count,
                itemBuilder: (context, index) {
                  return ProviderScope(
                    overrides: [
                      currentQuestion.overrideWithValue(
                        ref
                            .watch(paginatedQuestionsProvider(index ~/ 50))
                            .whenData((page) => page.items[index % 50]),
                      ),
                    ],
                    child: const QuestionItem(),
                  );
                },
                separatorBuilder: (context, _) {
                  return const Divider(
                    height: 30,
                    color: Color(0xff3d3d3d),
                  );
                },
              ),
            );
          },
        );
      }),
    );
  }
}