import json
import pytest
from unittest.mock import AsyncMock, MagicMock

from app.screener.ai_news import analyzer


def _mk_llm(content_text: str, in_tokens: int = 100, out_tokens: int = 20):
    llm = AsyncMock()
    resp = MagicMock()
    block = MagicMock()
    block.text = content_text
    resp.content = [block]
    resp.usage = MagicMock(input_tokens=in_tokens, output_tokens=out_tokens)
    llm.messages = MagicMock()
    llm.messages.create = AsyncMock(return_value=resp)
    return llm


NEWS = [{"title": "삼성전자, HBM 양산"}, {"title": "메모리 가격 반등"}]


@pytest.mark.asyncio
async def test_score_sentiment_success_parses_json():
    llm = _mk_llm(json.dumps({"score": 7.5, "reason": "HBM 호재"}))
    out = await analyzer.score_sentiment(llm, "005930", NEWS, name="삼성전자")
    assert out["ticker"] == "005930"
    assert out["score_raw"] == 7.5
    assert out["reason"] == "HBM 호재"
    assert out["news_count"] == 2
    assert out["tokens_input"] == 100
    assert out["tokens_output"] == 20


@pytest.mark.asyncio
async def test_score_sentiment_json_parse_fail_returns_zero():
    llm = _mk_llm("not valid json")
    out = await analyzer.score_sentiment(llm, "005930", NEWS)
    assert out["score_raw"] == 0.0
    assert "parse fail" in out["reason"]
    assert out["tokens_input"] == 100  # 호출은 발생했음


@pytest.mark.asyncio
async def test_score_sentiment_clamps_out_of_range():
    llm = _mk_llm(json.dumps({"score": 15.0, "reason": "초강세"}))
    out = await analyzer.score_sentiment(llm, "005930", NEWS)
    assert out["score_raw"] == 10.0  # +10 클램프


@pytest.mark.asyncio
async def test_score_sentiment_clamps_negative_out_of_range():
    llm = _mk_llm(json.dumps({"score": -42.0, "reason": "초악재"}))
    out = await analyzer.score_sentiment(llm, "005930", NEWS)
    assert out["score_raw"] == -10.0