import 'package:flutter_test/flutter_test.dart';
import 'package:life_helper/domain/ai/parse_response.dart';
import 'package:life_helper/domain/models/habit.dart';

void main() {
  test('parses 3 valid candidates', () {
    final r = parseFrameCandidates({
      'candidates': [
        {'level': 'L2', 'framed_text': '저녁엔 무알콜 마시기', 'confidence': 0.9},
        {'level': 'L3', 'framed_text': '나는 맑은 정신의 사람이다'},
        {'level': 'L2', 'framed_text': '주중엔 운동 우선'},
      ],
    });
    expect(r, hasLength(3));
    expect(r[0].level, FrameLevel.l2);
    expect(r[0].confidence, 0.9);
    expect(r[1].level, FrameLevel.l3);
    expect(r[1].confidence, 0.5); // default
  });

  test('candidates missing → FormatException', () {
    expect(
      () => parseFrameCandidates({'foo': 'bar'}),
      throwsA(isA<FormatException>()),
    );
  });

  test('candidates not list → FormatException', () {
    expect(
      () => parseFrameCandidates({'candidates': 'oops'}),
      throwsA(isA<FormatException>()),
    );
  });

  test('empty candidates → empty list (no throw)', () {
    final r = parseFrameCandidates({'candidates': []});
    expect(r, isEmpty);
  });

  test('skips unknown level + length-violating items', () {
    final tooLong = 'a' * 121;
    final r = parseFrameCandidates({
      'candidates': [
        {'level': 'L99', 'framed_text': '?'}, // skipped
        {'level': 'L2', 'framed_text': tooLong}, // skipped
        {'level': 'L3', 'framed_text': '   '}, // skipped (empty after trim)
        {'level': 'L2', 'framed_text': '유효한 후보'},
      ],
    });
    expect(r, hasLength(1));
    expect(r.first.framedText, '유효한 후보');
  });

  test('confidence clamps and falls back to 0.5', () {
    final r = parseFrameCandidates({
      'candidates': [
        {'level': 'L2', 'framed_text': 'a', 'confidence': -0.4},
        {'level': 'L2', 'framed_text': 'b', 'confidence': 2.5},
        {'level': 'L2', 'framed_text': 'c', 'confidence': 'not-a-number'},
      ],
    });
    expect(r[0].confidence, 0.0);
    expect(r[1].confidence, 1.0);
    expect(r[2].confidence, 0.5);
  });

  test('keeps L0/L1 candidates (filtering is suggestFrame responsibility)', () {
    final r = parseFrameCandidates({
      'candidates': [
        {'level': 'L0', 'framed_text': '술 끊기'},
        {'level': 'L2', 'framed_text': '무알콜'},
      ],
    });
    expect(r, hasLength(2));
    expect(r[0].level, FrameLevel.l0);
  });

  test('source_pattern_id preserved when present', () {
    final r = parseFrameCandidates({
      'candidates': [
        {
          'level': 'L2',
          'framed_text': 'foo',
          'source_pattern_id': 'fp_alcohol'
        },
      ],
    });
    expect(r.single.sourcePatternId, 'fp_alcohol');
  });
}