"""web_crawler 모듈 테스트."""
import pytest
from unittest.mock import patch, AsyncMock
from app.web_crawler import crawl_blog_content, enrich_top_blogs, _parse_naver_blog_url


def test_parse_naver_blog_url_valid():
    """blog.naver.com URL에서 blogId와 logNo를 올바르게 파싱."""
    result = _parse_naver_blog_url("https://blog.naver.com/testuser/123456")
    assert result == ("testuser", "123456")


def test_parse_returns_none_for_invalid_url():
    """잘못된 URL은 None 반환."""
    result = _parse_naver_blog_url("https://example.com/post")
    assert result is None


@pytest.mark.asyncio
async def test_crawl_returns_empty_on_non_naver_url():
    """네이버 블로그가 아닌 URL은 빈 문자열 반환."""
    result = await crawl_blog_content("https://example.com/post")
    assert result == ""


@pytest.mark.asyncio
async def test_crawl_truncates_to_2000_chars():
    """본문이 2000자를 초과하면 잘라낸다."""
    long_html = f'<div class="se-main-container"><p>{"가" * 3000}</p></div>'
    with patch("app.web_crawler._fetch_html", new_callable=AsyncMock, return_value=long_html):
        result = await crawl_blog_content("https://blog.naver.com/testuser/123")
    assert len(result) <= 2000


@pytest.mark.asyncio
async def test_crawl_returns_empty_on_fetch_failure():
    """HTTP 요청 실패 시 빈 문자열 반환."""
    with patch("app.web_crawler._fetch_html", new_callable=AsyncMock, side_effect=Exception("timeout")):
        result = await crawl_blog_content("https://blog.naver.com/testuser/123")
    assert result == ""


@pytest.mark.asyncio
async def test_enrich_top_blogs_adds_content_field():
    """enrich_top_blogs가 각 블로그에 content 필드를 추가."""
    blogs = [
        {"title": "테스트", "link": "https://blog.naver.com/user1/111", "bloggername": "유저1", "description": "설명"},
        {"title": "테스트2", "link": "https://blog.naver.com/user2/222", "bloggername": "유저2", "description": "설명2"},
    ]
    with patch("app.web_crawler.crawl_blog_content", new_callable=AsyncMock, return_value="크롤링된 본문"):
        result = await enrich_top_blogs(blogs)
    assert len(result) == 2
    assert result[0]["content"] == "크롤링된 본문"
    assert result[1]["content"] == "크롤링된 본문"


@pytest.mark.asyncio
async def test_enrich_top_blogs_handles_partial_failure():
    """일부 크롤링 실패 시에도 나머지는 정상 처리."""
    blogs = [
        {"title": "성공", "link": "https://blog.naver.com/user1/111"},
        {"title": "실패", "link": "https://blog.naver.com/user2/222"},
    ]
    side_effects = ["성공 본문", Exception("fail")]
    with patch("app.web_crawler.crawl_blog_content", new_callable=AsyncMock, side_effect=side_effects):
        result = await enrich_top_blogs(blogs)
    assert result[0]["content"] == "성공 본문"
    assert result[1]["content"] == ""