import 'package:eaimar/modules/translation/models/translation_export.dart';
import 'package:eaimar/modules/translation/models/translation_models.dart';
import 'package:flutter_test/flutter_test.dart';

TranslationItem _item(
  DateTime at, {
  String src = '你好',
  String dst = 'Hello',
  String srcLang = 'zh-CN',
  String serviceId = '',
  bool intermediate = false,
}) =>
    TranslationItem(
      sourceText: src,
      translatedText: dst,
      sourceLanguageCode: srcLang,
      targetLanguageCode: srcLang == 'zh-CN' ? 'en-US' : 'zh-CN',
      timestamp: at,
      sessionId: 's',
      serviceId: serviceId,
      isIntermediate: intermediate,
    );

void main() {
  final t0 = DateTime(2026, 9, 18, 10, 0, 0);

  test('只取录音开始之后的整句，时间是相对录音起点的毫秒', () {
    final out = buildMeetingTranscript(
      items: [
        _item(t0.subtract(const Duration(seconds: 5)), src: '上一轮的'),
        _item(t0.add(const Duration(seconds: 2))),
        _item(t0.add(const Duration(seconds: 6)), src: '半句', intermediate: true),
        _item(t0.add(const Duration(seconds: 9)), src: '第二句', dst: 'Second'),
      ],
      recordingStartedAt: t0,
      mode: 'simultaneous',
      ownLanguageCode: 'zh-CN',
    );
    expect(out.length, 2);
    expect(out[0]['starttime'], 2000);
    expect(out[0]['endtime'], 9000); // 下一句开头
    expect(out[0]['content'], '你好\nHello');
    expect(out[0]['speaker'], ''); // 同传单向，不标说话人
    expect(out[1]['starttime'], 9000);
    expect(out[1]['endtime'], greaterThan(9000)); // 最后一句按字数估
  });

  test('通话翻译按 AST 的 serviceId 分说话人：A=0 本端 B=1 对端', () {
    final out = buildMeetingTranscript(
      items: [
        _item(t0.add(const Duration(seconds: 1)), serviceId: 'A'),
        _item(t0.add(const Duration(seconds: 3)),
            src: 'Hi', dst: '嗨', srcLang: 'en-US', serviceId: 'B'),
      ],
      recordingStartedAt: t0,
      mode: 'call',
      ownLanguageCode: 'zh-CN',
    );
    expect(out.map((e) => e['speaker']), ['Speaker_0', 'Speaker_1']);
  });

  test('面对面没有 serviceId，按这句话的语言分：说源语言的是本端', () {
    final out = buildMeetingTranscript(
      items: [
        _item(t0.add(const Duration(seconds: 1))),
        _item(t0.add(const Duration(seconds: 3)),
            src: 'Hi', dst: '嗨', srcLang: 'en-US'),
      ],
      recordingStartedAt: t0,
      mode: 'faceToFace',
      ownLanguageCode: 'zh-CN',
    );
    expect(out.map((e) => e['speaker']), ['Speaker_0', 'Speaker_1']);
  });

  test('暂停区间要从偏移里扣掉（面对面逐句松手即暂停）', () {
    final out = buildMeetingTranscript(
      items: [
        _item(t0.add(const Duration(seconds: 2))),
        // 3s~13s 暂停了 10 秒，这句在 15s 说的，音频里其实是第 5 秒
        _item(t0.add(const Duration(seconds: 15)), src: '第二句', dst: ''),
      ],
      recordingStartedAt: t0,
      mode: 'faceToFace',
      ownLanguageCode: 'zh-CN',
      pauses: [
        (t0.add(const Duration(seconds: 3)), t0.add(const Duration(seconds: 13)))
      ],
    );
    expect(out[0]['starttime'], 2000);
    expect(out[0]['endtime'], 5000);
    expect(out[1]['starttime'], 5000);
    expect(out[1]['content'], '第二句'); // 没译文就只有原文一行
  });

  test('译文与原文相同时不重复', () {
    final out = buildMeetingTranscript(
      items: [_item(t0.add(const Duration(seconds: 1)), src: 'OK', dst: 'OK')],
      recordingStartedAt: t0,
      mode: 'simultaneous',
      ownLanguageCode: 'zh-CN',
    );
    expect(out.single['content'], 'OK');
  });

  test('没有整句就返回空，调用方据此退回普通录音归档', () {
    expect(
      buildMeetingTranscript(
        items: [_item(t0.add(const Duration(seconds: 1)), src: '  ')],
        recordingStartedAt: t0,
        mode: 'call',
        ownLanguageCode: 'zh-CN',
      ),
      isEmpty,
    );
  });
}