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

ReviewItem review(String id, String target) => ReviewItem(
  id: id,
  target: target,
  prompt: 'Test prompt',
  hint: target,
  dueAt: DateTime(2026),
  skill: '回忆表达',
);

void main() {
  test('does not accept unrelated English for a core phrase', () {
    final result = ReviewFeedback.check(
      review('A0-P12', "I'm from [place]."),
      'I like tea.',
    );
    expect(result.complete, isFalse);
  });

  test('accepts a new place in the from pattern', () {
    final result = ReviewFeedback.check(
      review('A0-P12', "I'm from [place]."),
      "I'm from Guangzhou.",
    );
    expect(result.complete, isTrue);
  });

  test('checks an A0 word without accepting a different word', () {
    expect(
      ReviewFeedback.check(review('A0-W04', 'three'), 'four').complete,
      isFalse,
    );
    expect(
      ReviewFeedback.check(review('A0-W04', 'three'), 'three').complete,
      isTrue,
    );
  });

  test('A0-P17 accepts standard o clock expressions', () {
    expect(
      ReviewFeedback.check(
        review('A0-P17', "It's [hour] o'clock."),
        "It's three o'clock.",
      ).complete,
      isTrue,
    );
    expect(
      ReviewFeedback.check(
        review('A0-P17', "It's [hour] o'clock."),
        'It is two o’clock.',
      ).complete,
      isTrue,
    );
    expect(
      ReviewFeedback.check(
        review('A0-P17', "It's [hour] o'clock."),
        'It is five oclock.',
      ).complete,
      isTrue,
    );
  });

  test('A0-P20 accepts please say that again and please speak slowly', () {
    expect(
      ReviewFeedback.check(
        review('A0-P20', 'Please say that again.'),
        'Please say that again.',
      ).complete,
      isTrue,
    );
    expect(
      ReviewFeedback.check(
        review('A0-P20', 'Please say that again.'),
        'Please speak slowly.',
      ).complete,
      isTrue,
    );
  });

  test('ignores multiple spaces and casing across review items', () {
    // Multi-space and uppercase on A0-P03
    expect(
      ReviewFeedback.check(
        review('A0-P03', 'Nice to meet you.'),
        '   NICE    TO    MEET    YOU!   ',
      ).complete,
      isTrue,
    );
    // Multi-space and uppercase on A0-P08
    expect(
      ReviewFeedback.check(
        review('A0-P08', 'My number is ...'),
        'MY   NUMBER   IS   ONE   TWO   THREE',
      ).complete,
      isTrue,
    );
    // Multi-space on word item
    expect(
      ReviewFeedback.check(review('A0-W04', 'three'), '   THREE   ').complete,
      isTrue,
    );
  });

  test('a dictation review needs the whole sentence that was played', () {
    final item = review('A0-W24', 'water').copyWith(
      skill: dictationSkill,
      prompt: coreReviewVariant('A0-W24', 1).prompt,
    );
    expect(ReviewFeedback.check(item, 'water').complete, isFalse);
    expect(ReviewFeedback.check(item, 'I like watter.').complete, isFalse);
    expect(ReviewFeedback.check(item, 'i like water').complete, isTrue);
  });

  test('offline review variants rotate recall, dictation and speaking', () {
    expect(coreReviewVariant('A0-P12', 0).skill, '回忆表达');
    expect(coreReviewVariant('A0-P12', 1).skill, dictationSkill);
    expect(coreReviewVariant('A0-P12', 2).skill, spokenRecallSkill);
    expect(coreReviewVariant('A0-P12', 3).skill, '回忆表达');
    for (final id in a0CoreItems.keys) {
      final sentence = coreDictationSentences[id];
      expect(sentence, isNotNull, reason: id);
      // Each dictation sentence really contains the item it checks.
      expect(coreItemUsedIn(id, sentence!.sentence), isTrue, reason: id);
    }
  });
}