import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/core/explorer/tree_rows.dart';
import 'package:jj_mkvmaker/core/file_ops.dart' show FileEntry;
import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
import 'package:jj_mkvmaker/services/platform_services.dart';
import 'package:jj_mkvmaker/ui/explorer/explorer_controller.dart';
import 'package:jj_mkvmaker/ui/explorer/explorer_host.dart';
import 'package:jj_mkvmaker/ui/explorer/explorer_pane.dart';
import 'package:jj_mkvmaker/ui/explorer/explorer_select.dart';
import 'package:path/path.dart' as p;

/// E5d-2 약속 시험: lib/ui/explorer/explorer_select.dart 맨 위 약속 (실제 시험 폴더 · Host 는 실제 화면).
void main() {
  late Directory tmp;
  late String root, show, ep1, ep2;
  setUp(() {
    tmp = Directory.systemTemp.createTempSync('jj_sel_ui_');
    root = tmp.path;
    show = p.join(root, 'Show');
    Directory(show).createSync();
    ep1 = p.join(show, 'ep1.mkv');
    ep2 = p.join(show, 'ep2.mkv');
    File(ep1).writeAsStringSync('1');
    File(ep2).writeAsStringSync('2');
  });
  tearDown(() => tmp.deleteSync(recursive: true));

  var now = DateTime(2026, 10, 22, 9);
  Future<(ExplorerSelect, ExplorerPane, List<String>)> open(WidgetTester t, {bool rsync = false}) async {
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    final key = GlobalKey<_HostState>();
    await t.pumpWidget(MaterialApp(home: _Host(key: key)));
    final ctl = ExplorerController(c, rsync: rsync, host: key.currentState!)..local = [(root, 'T:')];
    final opened = <String>[];
    final sel = ExplorerSelect(ctl, clock: () => now, openFile: (path, _) async => opened.add(path));
    addTearDown(() {
      sel.dispose();
      ctl.dispose();
    });
    final q = ctl.panes[0];
    await t.runAsync(() => ctl.goTo(q, root));
    return (sel, q, opened);
  }

  TreeRow rowOf(String path, {bool dir = false}) => TreeRow(FileEntry(path, isDir: dir, modified: DateTime(0)), 1);

  testWidgets('폴더 한 번 = 펼침 · 다시 = 접힘 (두 번 누르기의 두 번째는 아님) · 파일 한 번 = 지금 줄 · 두 번 = 열기', (t) async {
    final (sel, q, opened) = await open(t);
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect(q.expanded.contains(show), isTrue);
    now = now.add(const Duration(milliseconds: 100));
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect(q.expanded.contains(show), isTrue, reason: '두 번 누르기의 두 번째');
    now = now.add(const Duration(seconds: 1));
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect(q.expanded.contains(show), isFalse, reason: '규칙 3');
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    await t.runAsync(() => sel.onTap(q, rowOf(ep1)));
    expect([q.focused, opened], [ep1, <String>[]]);
    await t.runAsync(() => sel.onOpen(q, rowOf(ep1)));
    expect(opened, [ep1]);
  });

  testWidgets('선택 모드: 파일 고름 · 폴더 = 자기 + 안 · 범위 · 뒤집기 · 끄면 모두 풀림', (t) async {
    final (sel, q, _) = await open(t);
    sel.setSelecting(true);
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect([sel.isMarked(q, ep1), q.expanded.contains(show)], [true, true]);
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect(q.sel.isEmpty, isTrue);
    await t.runAsync(() => sel.toggleMark(q, FileEntry(ep1, isDir: false, modified: DateTime(0))));
    expect(sel.canRange(q, FileEntry(ep2, isDir: false, modified: DateTime(0))), isTrue);
    sel.markRange(q, FileEntry(ep2, isDir: false, modified: DateTime(0)));
    expect(q.sel.marked.length, 2);
    sel.invertMarks(q, show);
    expect(q.sel.isEmpty, isTrue);
    sel.markWhere(q, show, (e) => e.path.endsWith('2.mkv'));
    expect(q.sel.marked, [ep2]);
    sel.setSelecting(false);
    expect([sel.selecting, q.sel.isEmpty], [false, true]);
  });

  testWidgets('Rsync: 폴더만 하나 · 고르면 펼침', (t) async {
    final (sel, q, _) = await open(t, rsync: true);
    await t.runAsync(() => sel.onTap(q, rowOf(ep1)));
    expect(q.sel.isEmpty, isTrue);
    await t.runAsync(() => sel.onTap(q, rowOf(show, dir: true)));
    expect([q.sel.marked, q.expanded.contains(show)], [
      [show],
      true
    ]);
  });
}

class _Host extends StatefulWidget {
  const _Host({super.key});
  @override
  State<_Host> createState() => _HostState();
}

class _HostState extends State<_Host> implements ExplorerHost {
  @override
  bool get alive => mounted;
  @override
  void snack(String text) => ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(text)));
  @override
  void reveal(ExplorerPane pane, String path) {}
  @override
  void afterFrame(VoidCallback f) => WidgetsBinding.instance.addPostFrameCallback((_) => f());
  @override
  Widget build(BuildContext context) => const Scaffold(body: SizedBox());
}