import 'dart:convert';
import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:kouyu_english/core/courses/courses.dart';
import 'package:kouyu_english/core/courses/course_pack.dart';

import '../tool/courses/course_validator.dart';

void main() {
  test('tokenize expands contractions and skips digits', () {
    expect(tokenize("I'm Tom. Can't pay 15 dollars at 7 a.m.; let's go"), [
      'i',
      'am',
      'tom',
      'can',
      'not',
      'pay',
      'dollars',
      'at',
      'am',
      'let',
      'us',
      'go',
    ]);
  });

  test('match groups use AND across groups and OR inside a group', () {
    expect(
      matchesRule("Sorry, I don't understand.", [
        ['do not understand'],
      ]),
      isTrue,
    );
    expect(
      matchesRule('twelvee', [
        ['twelve'],
      ]),
      isFalse,
    );
    expect(
      matchesRule('What is this word?', [
        ['what does', 'what is'],
        ['mean'],
      ]),
      isFalse,
    );
  });

  test('course packs pass validation', () {
    final report = CourseValidator(
      projectRoot: Directory.current,
      a0Texts: [
        for (final item in a0CoreItems.values)
          item.replaceAll(RegExp(r'\[[^\]]*\]'), ''),
        for (final sentence in coreDictationSentences.values) sentence.sentence,
      ],
    ).validate();
    expect(report.errors.map((issue) => '$issue'), isEmpty);
  });

  test('the course parser keeps item links and extra model sentences', () {
    final unit =
        jsonDecode(File('assets/courses/A1/A1-U01.json').readAsStringSync())
            as Map<String, dynamic>;
    final segment = PackSegment.fromJson(
      (unit['segments'] as List).first as Map<String, dynamic>,
    );
    expect(segment.speakingItemIds, ['A1-U01-P01', 'A1-U01-P04']);
    expect(segment.speakingExamples, isNotEmpty);
    expect(segment.speakingChunks.join(' '), segment.speakingText);
  });
}