// 功能描述：语音结果选区替换、重复中间结果、拒绝权限、离页取消与长度边界回归。
// 版本：1.0.0。
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:user_app/data/services/repair_speech.dart';
import 'package:user_app/ui/features/tickets/repair_speech_button.dart';

class _Speech implements RepairSpeech {
  bool available = true;
  int cancels = 0, starts = 0;
  Completer<bool>? pending;
  late void Function(String) words, error;
  late void Function() done;
  @override
  Future<bool> start({
    required void Function(String) onWords,
    required void Function(String) onError,
    required void Function() onDone,
  }) async {
    starts++;
    words = onWords;
    error = onError;
    done = onDone;
    return pending?.future ?? available;
  }

  @override
  Future<void> stop() async {
    done();
  }

  @override
  Future<void> cancel() async {
    cancels++;
  }
}

void main() {
  testWidgets('权限弹窗不取消初始化，切后台立即取消', (tester) async {
    final speech = _Speech()..pending = Completer<bool>();
    final controller = TextEditingController(text: '保留');
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: RepairSpeechButton(controller: controller, onBusy: (_) {}, speech: speech),
        ),
      ),
    );
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.inactive);
    await tester.pump();
    expect(speech.cancels, 0);
    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.paused);
    await tester.pump();
    expect(speech.cancels, 1);
    speech.pending!.complete(true);
    speech.words('迟到');
    await tester.pump();
    expect(controller.text, '保留');
    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.resumed);
    await tester.pumpWidget(const SizedBox());
    controller.dispose();
  });
  testWidgets('选区替换和中间结果不重复追加，结束后可再次录入', (tester) async {
    final speech = _Speech(), controller = TextEditingController(text: '前旧后');
    controller.selection = const TextSelection(baseOffset: 1, extentOffset: 2);
    final busy = <bool>[];
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: RepairSpeechButton(controller: controller, onBusy: busy.add, speech: speech),
        ),
      ),
    );
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    speech.words('阀门');
    speech.words('阀门异响');
    await tester.pump();
    expect(controller.text, '前阀门异响后');
    await tester.tap(find.text('结束识别'));
    await tester.pump();
    speech.words('迟到结果');
    expect(controller.text, '前阀门异响后');
    expect(busy.last, false);
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    speech.words('补充');
    speech.done();
    await tester.pump();
    expect(controller.text, '前阀门异响补充后');
    expect(speech.starts, 2);
    await tester.pumpWidget(const SizedBox());
    controller.dispose();
  });
  testWidgets('不可用和权限拒绝保留输入并解除忙碌', (tester) async {
    final speech = _Speech()..available = false, controller = TextEditingController(text: '已有内容');
    final busy = <bool>[];
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: RepairSpeechButton(controller: controller, onBusy: busy.add, speech: speech),
        ),
      ),
    );
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    expect(find.textContaining('无法使用语音识别'), findsOneWidget);
    expect(controller.text, '已有内容');
    expect(busy.last, false);
    speech.available = true;
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    speech.error('error_permission');
    await tester.pump();
    expect(find.textContaining('未获得麦克风'), findsOneWidget);
    expect(controller.text, '已有内容');
    expect(busy.last, false);
    await tester.pumpWidget(const SizedBox());
    controller.dispose();
  });
  testWidgets('初始化中离页取消，迟到结果不改变文字', (tester) async {
    final speech = _Speech()..pending = Completer<bool>(),
        controller = TextEditingController(text: '保留');
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: RepairSpeechButton(controller: controller, onBusy: (_) {}, speech: speech),
        ),
      ),
    );
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    await tester.pumpWidget(const SizedBox());
    speech.pending!.complete(true);
    speech.words('迟到');
    await tester.pump();
    expect(speech.cancels, 1);
    expect(controller.text, '保留');
    expect(tester.takeException(), isNull);
    controller.dispose();
  });
  testWidgets('识别遵守2000字符上限，不截断表情字符', (tester) async {
    final speech = _Speech(),
        controller = TextEditingController(text: List.filled(1999, '字').join());
    await tester.pumpWidget(
      MaterialApp(
        home: Scaffold(
          body: RepairSpeechButton(controller: controller, onBusy: (_) {}, speech: speech),
        ),
      ),
    );
    await tester.tap(find.text('语音输入'));
    await tester.pump();
    speech.words('😀多余');
    speech.done();
    await tester.pump();
    expect(controller.text.characters.length, 2000);
    expect(controller.text.endsWith('😀'), true);
    await tester.pumpWidget(const SizedBox());
    controller.dispose();
  });
}