import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:miaoji_zhang/shared/services/recognition_import_service.dart';
import 'package:miaoji_zhang/shared/services/recognition_diagnostic_formatter.dart';
import 'package:miaoji_zhang/shared/services/screenshot_channel.dart';
import 'package:miaoji_zhang/shared/services/shanghai_time.dart';
import 'package:miaoji_zhang/shared/theme/theme_store.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test('上海时区周期边界不受设备时区影响', () {
    final civil = ShanghaiTime.toCivil(DateTime.utc(2026, 6, 30, 16, 30));
    expect(civil, DateTime(2026, 7, 1, 0, 30));

    final month = ShanghaiTime.monthRangeUtc(2026, 7);
    expect(month.start, DateTime.utc(2026, 6, 30, 16));
    expect(month.end, DateTime.utc(2026, 7, 31, 16));

    final week = ShanghaiTime.weekRangeUtc(DateTime(2026, 7, 19));
    expect(week.start, DateTime.utc(2026, 7, 12, 16));
    expect(week.end, DateTime.utc(2026, 7, 19, 16));
  });

  test('无障碍运行时长不会被当作 Unix 时间戳', () {
    final now = DateTime.utc(2026, 7, 22, 8, 30);
    expect(RecognitionImportService.validOccurredAtUtc(1234, now: now), now);
    expect(
      RecognitionImportService.validOccurredAtUtc(
        DateTime.utc(2026, 7, 22, 8).millisecondsSinceEpoch,
        now: now,
      ),
      DateTime.utc(2026, 7, 22, 8),
    );
  });

  test('三态主题从本地恢复并持久化', () async {
    SharedPreferences.setMockInitialValues({'theme_preference': 'dark'});
    await ThemeStore.instance.initialize();
    expect(ThemeStore.instance.preference, JzThemePreference.dark);
    expect(ThemeStore.instance.themeMode, ThemeMode.dark);

    await ThemeStore.instance.setPreference(JzThemePreference.light);
    final preferences = await SharedPreferences.getInstance();
    expect(preferences.getString('theme_preference'), 'light');
    expect(ThemeStore.instance.themeMode, ThemeMode.light);
  });

  test('旧版无时区接口时间按 UTC 解释后显示上海时间', () {
    expect(
      ShanghaiTime.parseUtcInstant('2026-07-22T14:35:00'),
      DateTime.utc(2026, 7, 22, 14, 35),
    );
    expect(
      ShanghaiTime.parseCivil('2026-07-22T14:35:00'),
      DateTime(2026, 7, 22, 22, 35),
    );
    expect(
      ShanghaiTime.parseCivil('2026-07-22T14:35:00Z'),
      DateTime(2026, 7, 22, 22, 35),
    );
  });

  test('原生识别候选保留红包分类与金额来源', () {
    final candidate = RecognitionCandidate.fromJson({
      'id': 'candidate-1',
      'clientRequestId': 'recognition-candidate-1',
      'state': 'auto_ready',
      'confidence': 'auto',
      'type': 'income',
      'source': 'local_ocr',
      'appName': '微信',
      'amount': 8.88,
      'occurredAtEpochMs': DateTime.utc(
        2026,
        7,
        22,
        14,
        35,
      ).millisecondsSinceEpoch,
      'recognitionKind': 'red_packet_receive',
      'categoryHint': '红包',
      'amountSource': 'result',
      'resultFingerprint': 'abc123',
    });

    expect(candidate.recognitionKind, 'red_packet_receive');
    expect(candidate.categoryHint, '红包');
    expect(candidate.amountSource, 'result');
    expect(candidate.resultFingerprint, 'abc123');
  });

  test('AI 批次模型保留动作、原因与可恢复状态', () {
    final batch = RecognitionBatch.fromJson({
      'id': 'batch-1',
      'state': 'ready',
      'openedAt': DateTime.utc(2026, 7, 25, 8).millisecondsSinceEpoch,
      'completedAt': DateTime.utc(2026, 7, 25, 8, 1).millisecondsSinceEpoch,
      'summary': {
        'kept': 1,
        'updated': 1,
        'created': 0,
        'dropped': 1,
        'fallback': false,
      },
      'items': [
        {
          'candidateId': 'candidate-1',
          'action': 'drop',
          'reason': '同一流程重复结果页',
          'state': 'ai_dropped',
          'type': 'expense',
          'amount': 20,
          'merchant': '张三',
          'canRestore': true,
        },
      ],
    });

    expect(batch.completedAt.isUtc, isTrue);
    expect(batch.updated, 1);
    expect(batch.dropped, 1);
    expect(batch.items.single.action, 'drop');
    expect(batch.items.single.reason, '同一流程重复结果页');
    expect(batch.items.single.canRestore, isTrue);
  });

  test('智能识别诊断摘要能区分关键失败类型', () {
    RecognitionDiagnostic diagnostic(String result, String reason) {
      return RecognitionDiagnostic(
        at: DateTime.utc(2026, 7, 22, 14, 35),
        appName: '微信',
        stage: 'ocr',
        result: result,
        reason: reason,
        nodeCount: 12,
        amountCandidates: 1,
      );
    }

    expect(
      RecognitionDiagnosticDisplay.from(
        diagnostic('failed', 'capture_timeout'),
      ).summaryLabel,
      '截图失败',
    );
    expect(
      RecognitionDiagnosticDisplay.from(
        diagnostic('failed', 'no_text'),
      ).summaryLabel,
      'OCR 无结果',
    );
    expect(
      RecognitionDiagnosticDisplay.from(
        diagnostic('rejected', 'payment_input_page'),
      ).summaryLabel,
      '规则拒绝',
    );
    expect(
      RecognitionDiagnosticDisplay.from(
        diagnostic('ignored', 'duplicate_result_surface'),
      ).summaryLabel,
      '已合并',
    );
  });
}