import sys, os
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))

import pytest
from unittest.mock import AsyncMock, patch
from app.curator.retrospective import build_retrospective, _detect_bias


def test_detect_bias_persistent_low():
    reviews = [
        {"pattern_delta": "저번호 편향 +1.2 / 합계 -18"},
        {"pattern_delta": "저번호 편향 +0.8"},
        {"pattern_delta": "저번호 편향 +1.0 / 홀짝 +0.5"},
    ]
    assert "저번호" in _detect_bias(reviews)


def test_detect_bias_no_persistence():
    reviews = [
        {"pattern_delta": "저번호 편향 +1.2"},
        {"pattern_delta": "고번호 편향 +0.8"},
    ]
    assert _detect_bias(reviews) == ""


@pytest.mark.asyncio
async def test_build_retrospective_with_data():
    with patch("app.service_proxy.lotto_review_by_draw", new=AsyncMock(return_value={
        "draw_no": 1153, "curator_avg_match": 1.8, "curator_best_tier": "안정",
        "user_avg_match": 2.0, "user_5plus_prizes": 1, "pattern_delta": "저번호 편향 +1.2",
    })), patch("app.service_proxy.lotto_reviews_history", new=AsyncMock(return_value=[
        {"draw_no": 1153, "curator_avg_match": 1.8, "user_avg_match": 2.0, "pattern_delta": "저번호 편향 +1.2"},
        {"draw_no": 1152, "curator_avg_match": 1.6, "user_avg_match": 1.5, "pattern_delta": "저번호 편향 +0.8"},
        {"draw_no": 1151, "curator_avg_match": 1.7, "user_avg_match": 1.8, "pattern_delta": "저번호 편향 +1.0"},
        {"draw_no": 1150, "curator_avg_match": 1.9, "user_avg_match": 2.2, "pattern_delta": ""},
    ])):
        out = await build_retrospective(1154)
        assert out["last_draw"]["draw_no"] == 1153
        assert out["trend_4w"]["curator_avg_4w"] == round((1.8+1.6+1.7+1.9)/4, 2)
        assert "저번호" in out["trend_4w"]["user_persistent_bias"]


@pytest.mark.asyncio
async def test_build_retrospective_no_review():
    with patch("app.service_proxy.lotto_review_by_draw", new=AsyncMock(return_value=None)):
        out = await build_retrospective(1154)
        assert out is None