import 'package:fancake/features/home/home_data.dart';
import 'package:fancake/features/home/home_repository_firestore.dart' show kstWeekStart;
import 'package:fancake/features/quest/quest_evidence.dart' show kstMidnight;
import 'package:flutter_test/flutter_test.dart';

/// HOME 주간 정보(A-37 · HOME 정보위계 v1.0 §2 · §3).
void main() {
  Map<String, dynamic> snap(int rank, {num? growthPop, num? sfpi}) => {
    'planets': [
      {'fandomId': 'other', 'rank': 1},
      {
        'fandomId': 'f',
        'rank': rank,
        'growthPop': ?growthPop,
        'sfpi': ?sfpi,
      },
    ],
  };

  test('순위는 주간 Snapshot · 변동은 직전 대비 · 성장은 두 축 증분 · 비율은 행성 주간 총량 대비', () {
    final w = HomeWeekly.from(
      fandomId: 'f',
      snapshots: [snap(3, growthPop: 1000, sfpi: 40), snap(5)],
      fandom: {'growthPop': 1500, 'sfpi': 52},
      myWeekPop: 125,
      wallet: {'activityBalance': 700, 'supportBalance': 30},
    );
    expect(w.rank, 3);
    expect(w.rankChange, 2, reason: '5위 → 3위 = 두 계단 오름');
    expect(w.weekGrowthPop, 500);
    expect(w.weekSfpi, 12);
    expect(w.myShare, 0.25);
    expect((w.generalPop, w.supportPop), (700, 30));
  });

  test('기준선 · 직전 Snapshot · 내 기여를 모르면 0 으로 채우지 않는다', () {
    final w = HomeWeekly.from(
      fandomId: 'f',
      snapshots: [snap(4)],
      fandom: {'growthPop': 1500},
      myWeekPop: null,
      wallet: const {},
    );
    expect(w.rank, 4);
    expect(w.rankChange, isNull);
    expect(w.weekGrowthPop, isNull);
    expect(w.myShare, isNull);
    final none = HomeWeekly.from(
      fandomId: 'f', snapshots: const [], fandom: const {}, myWeekPop: 0, wallet: const {},
    );
    expect(none.rank, isNull);
  });

  test('만보기 Health 집계 시작은 그 날 0시(KST) — 서버 dayKey 와 같은 경계 (B-02)', () {
    // 10-07 00:30 KST(= 10-06 15:30 UTC) → 10-07 00:00 KST = 10-06 15:00 UTC.
    expect(
      kstMidnight(DateTime.parse('2026-10-06T15:30:00Z')),
      DateTime.parse('2026-10-06T15:00:00Z'),
    );
  });

  test('이번 주 시작은 KST 월요일 00:00', () {
    // 2026-10-07(수) 15:00 KST → 2026-10-05(월) 00:00 KST = 10-04 15:00 UTC.
    expect(
      kstWeekStart(DateTime.parse('2026-10-07T06:00:00Z')),
      DateTime.parse('2026-10-04T15:00:00Z'),
    );
    // 월요일 08:59 KST(= 일요일 23:59 UTC)도 그 주다.
    expect(
      kstWeekStart(DateTime.parse('2026-10-04T23:59:00Z')),
      DateTime.parse('2026-10-04T15:00:00Z'),
    );
  });
}