import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/data/models.dart';
import 'package:reelbox/ui/catalog.dart';
import 'package:reelbox/media/download_button.dart';
import 'package:reelbox/media/downloads_page.dart';

import 'catalog_widget_test.dart' show CatalogApi, mountCatalog;

void main() {
  testWidgets(
    'embedded sources are rejected without enqueue or external handoff',
    (tester) async {
      var dispatched = 0;
      var navigations = 0;
      final state = await mountCatalog(
        tester,
        CatalogApi(),
        Scaffold(
          body: DownloadButton(
            title: const TitleRecord(id: 7, title: 'Movie'),
            source: const MediaSource(
              type: 'youtube',
              url: 'https://youtu.be/fixture',
            ),
            enqueue: ({required title, required source, episode}) async {
              dispatched++;
            },
            openDownloads: (_) => navigations++,
          ),
        ),
      );
      addTearDown(state.dispose);
      await tester.tap(find.text('Download in Reelbox'));
      await tester.pumpAndSettle();
      expect(dispatched, 0);
      expect(navigations, 0);
      expect(
        find.textContaining('Embedded sources cannot be downloaded'),
        findsOneWidget,
      );
      expect(tester.takeException(), isNull);
    },
  );

  testWidgets('source cards label the internal Reelbox download action', (
    tester,
  ) async {
    final state = await mountCatalog(
      tester,
      CatalogApi(),
      const TitlePage(title: TitleRecord(id: 7, title: 'Fixture')),
    );
    addTearDown(state.dispose);
    expect(
      find.widgetWithText(FilledButton, 'Download in Reelbox'),
      findsWidgets,
    );
  });

  testWidgets(
    'enqueue failure shows its cause and allows retry without navigating',
    (tester) async {
      var attempts = 0;
      var navigations = 0;
      final state = await mountCatalog(
        tester,
        CatalogApi(),
        Scaffold(
          body: DownloadButton(
            title: const TitleRecord(id: 7, title: 'Movie'),
            source: const MediaSource(url: 'https://media.example/movie.mp4'),
            enqueue: ({required title, required source, episode}) async {
              attempts++;
              throw StateError('HTTP 403: this media URL has expired.');
            },
            openDownloads: (_) => navigations++,
          ),
        ),
      );
      addTearDown(state.dispose);
      await tester.tap(find.text('Download in Reelbox'));
      await tester.pumpAndSettle();
      expect(
        find.textContaining('HTTP 403: this media URL has expired.'),
        findsOneWidget,
      );
      expect(navigations, 0);
      expect(tester.takeException(), isNull);
      await tester.tap(find.text('Download in Reelbox'));
      await tester.pump();
      expect(attempts, 2);
    },
  );

  testWidgets(
    'selected episode queues once while starting then opens Downloads',
    (tester) async {
      const title = TitleRecord(id: 41, title: 'Series', type: 'serie');
      const source = MediaSource(
        id: 9,
        quality: '720p',
        url: 'https://media.example/episode.mp4',
      );
      const episode = EpisodeRecord(id: 52, title: 'Episode 2');
      final pending = Completer<void>();
      final dispatched = <(TitleRecord, MediaSource, EpisodeRecord?)>[];
      final state = await mountCatalog(
        tester,
        CatalogApi(),
        Scaffold(
          body: DownloadButton(
            title: title,
            source: source,
            episode: episode,
            enqueue: ({required title, required source, episode}) {
              dispatched.add((title, source, episode));
              return pending.future;
            },
          ),
        ),
      );
      addTearDown(state.dispose);
      final button = find.widgetWithText(FilledButton, 'Download in Reelbox');
      await tester.tap(button);
      await tester.tap(button);
      await tester.pump();
      expect(dispatched, [(title, source, episode)]);
      expect(
        tester.widget<FilledButton>(find.byType(FilledButton)).onPressed,
        isNull,
      );
      expect(find.byType(CircularProgressIndicator), findsOneWidget);
      expect(find.byType(DownloadsPage), findsNothing);
      pending.complete();
      await tester.pumpAndSettle();
      expect(find.byType(DownloadsPage), findsOneWidget);
      expect(dispatched, hasLength(1));
      expect(tester.takeException(), isNull);
    },
    variant: TargetPlatformVariant.only(TargetPlatform.linux),
  );
}