import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/core/file_ops.dart';
import 'package:jj_mkvmaker/core/text_codec.dart';
import 'package:jj_mkvmaker/ui/explorer_grid.dart';
import 'package:jj_mkvmaker/ui/text_viewer.dart';
import 'package:path/path.dart' as p;

/// X-plore 비교 g · h: 격자 보기 · 글 뷰어
void main() {
  late Directory tmp;
  setUp(() => tmp = Directory.systemTemp.createTempSync('jj_xptools_'));
  tearDown(() => tmp.deleteSync(recursive: true));

  testWidgets('h 글 뷰어: CP949 를 알아보고 나눠 읽기 [더 읽기]', (t) async {
    final text = List.generate(40, (i) => '줄 $i 한글').join('\n');
    final f = File(p.join(tmp.path, 'k.txt'))..writeAsBytesSync(encodeText(text, 'CP949').bytes);
    await t.pumpWidget(MaterialApp(home: TextViewerPage(path: f.path, chunk: 120)));
    for (var i = 0; i < 20 && find.textContaining('줄 0').evaluate().isEmpty; i++) {
      await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 30)));
      await t.pump();
    }
    expect(find.text('줄 0 한글'), findsOneWidget);
    expect(find.text('더 읽기'), findsOneWidget, reason: '큰 파일은 나눠 읽음');
    for (var k = 0; k < 10 && find.text('더 읽기').evaluate().isNotEmpty; k++) {
      await t.tap(find.text('더 읽기'));
      for (var i = 0; i < 5; i++) {
        await t.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 30)));
        await t.pump();
      }
    }
    expect(find.text('더 읽기'), findsNothing, reason: '다 읽음');
    expect(find.text('CP949 (EUC-KR)'), findsOneWidget);
  });

  testWidgets('g 격자 보기: 그림 · 동영상만, 누르면 열기', (t) async {
    final png = File(p.join(tmp.path, 'a.png'))..writeAsBytesSync([0x89, 0x50]);
    final opened = <String>[];
    final entries = [
      FileEntry(png.path, isDir: false, size: 2, modified: DateTime(2026)),
      FileEntry(p.join(tmp.path, 'b.mkv'), isDir: false, size: 2, modified: DateTime(2026)),
      FileEntry(p.join(tmp.path, 'c.txt'), isDir: false, size: 2, modified: DateTime(2026)),
      FileEntry(p.join(tmp.path, 'dir'), isDir: true, modified: DateTime(2026)),
    ];
    expect(ExplorerGridPage.pick(entries, const ['png']).map((e) => e.name), ['a.png', 'b.mkv']);
    await t.pumpWidget(MaterialApp(
      home: ExplorerGridPage(
        title: 'T',
        entries: entries,
        imageExts: const ['png'],
        videoThumb: (_) async => null,
        onOpen: (e) async => opened.add(e.name),
      ),
    ));
    await t.pump();
    expect(find.text('a.png'), findsOneWidget);
    expect(find.text('c.txt'), findsNothing);
    await t.tap(find.text('b.mkv'));
    expect(opened, ['b.mkv']);
  });
}