"""Tests for ZhihuAdapter

Tests cover:
- Answer content extraction
- Zhuanlan (article) content extraction
- Cookie-based authentication
- Login page detection
- AuthError handling
"""

import pytest
from unittest.mock import MagicMock, patch, PropertyMock
import asyncio

from kb_pipeline.platforms.zhihu import ZhihuAdapter
from kb_pipeline.errors import AuthError


class TestZhihuAdapterAnswerContent:
    """Tests for ZhihuAdapter answer extraction"""

    def test_get_content_type_answer(self):
        """Test content type detection for answer URLs"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test"  # Avoid config loading

        assert adapter.get_content_type("https://www.zhihu.com/question/123456/answer/789012") == "answer"
        assert adapter.get_content_type("https://zhihu.com/question/123/answer/456") == "answer"

    def test_get_content_type_zhuanlan(self):
        """Test content type detection for zhuanlan URLs"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test"  # Avoid config loading

        assert adapter.get_content_type("https://zhuanlan.zhihu.com/p/123456") == "zhuanlan"
        assert adapter.get_content_type("https://zhuanlan.zhihu.com/p/abc123") == "zhuanlan"

    def test_get_content_type_unknown(self):
        """Test content type detection for unknown URLs"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test"  # Avoid config loading

        assert adapter.get_content_type("https://www.zhihu.com/question/123456") == "unknown"
        assert adapter.get_content_type("https://www.zhihu.com/") == "unknown"
        assert adapter.get_content_type("https://example.com") == "unknown"

    def test_get_output_filename(self):
        """Test output filename generation"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test"  # Avoid config loading

        assert adapter.get_output_filename("789012", "answer", "metadata.json") == "zhihu_789012_metadata.json"
        assert adapter.get_output_filename("123456", "zhuanlan", "content.md") == "zhihu_123456_content.md"

    @pytest.mark.asyncio
    async def test_fetch_metadata_answer(self, mock_zhihu_answer_result):
        """Test fetching answer metadata"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test_cookie"  # Set cookie directly

        with patch.object(adapter, '_extract_with_playwright', return_value=mock_zhihu_answer_result):
            metadata = await adapter.fetch_metadata("789012", "answer")

        assert metadata["title"] == "Test Question Title"
        assert metadata["author"] == "Test Author"
        assert metadata["type"] == "answer"

    @pytest.mark.asyncio
    async def test_fetch_content_answer(self, mock_zhihu_answer_result):
        """Test fetching answer content as Markdown"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test_cookie"  # Set cookie directly

        with patch.object(adapter, '_extract_with_playwright', return_value=mock_zhihu_answer_result):
            content = await adapter.fetch_content("789012", "answer")

        assert "---" in content  # YAML frontmatter
        assert "title:" in content
        assert "Test Question Title" in content
        assert "This is the answer content" in content

    @pytest.mark.asyncio
    async def test_fetch_metadata_no_cookie_raises_auth_error(self):
        """Test that missing cookie raises AuthError"""
        adapter = ZhihuAdapter()
        adapter._cookie = ""  # Empty cookie

        with pytest.raises(AuthError) as exc_info:
            await adapter.fetch_metadata("789012", "answer")

        assert exc_info.value.auth_type == "zhihu_cookie"


class TestZhihuAdapterZhuanlanContent:
    """Tests for ZhihuAdapter zhuanlan (article) extraction"""

    @pytest.mark.asyncio
    async def test_fetch_metadata_zhuanlan(self, mock_zhihu_zhuanlan_result):
        """Test fetching zhuanlan metadata"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test_cookie"  # Set cookie directly

        with patch.object(adapter, '_extract_with_playwright', return_value=mock_zhihu_zhuanlan_result):
            metadata = await adapter.fetch_metadata("123456", "zhuanlan")

        assert metadata["title"] == "Test Article Title"
        assert metadata["author"] == "Test Author"
        assert metadata["type"] == "zhuanlan"

    @pytest.mark.asyncio
    async def test_fetch_content_zhuanlan(self, mock_zhihu_zhuanlan_result):
        """Test fetching zhuanlan content as Markdown"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test_cookie"  # Set cookie directly

        with patch.object(adapter, '_extract_with_playwright', return_value=mock_zhihu_zhuanlan_result):
            content = await adapter.fetch_content("123456", "zhuanlan")

        assert "---" in content  # YAML frontmatter
        assert "title:" in content
        assert "Test Article Title" in content
        assert "This is the article content" in content

    @pytest.mark.asyncio
    async def test_detect_login_page_raises_auth_error(self):
        """Test that login page detection raises AuthError"""
        adapter = ZhihuAdapter()
        adapter._cookie = "expired_cookie"  # Set cookie directly

        # Simulate login page response (empty content or login title)
        login_page_result = {
            "type": "answer",
            "title": "登录 - 知乎",
            "content": "",
            "content_markdown": "",
        }

        with patch.object(adapter, '_extract_with_playwright', return_value=login_page_result):
            with pytest.raises(AuthError) as exc_info:
                await adapter.fetch_metadata("789012", "answer")

        assert exc_info.value.auth_type == "zhihu_cookie"
        assert "过期" in str(exc_info.value.cause) or "expired" in str(exc_info.value.cause).lower()

    @pytest.mark.asyncio
    async def test_detect_short_content_raises_auth_error(self):
        """Test that very short content (< 100 chars) raises AuthError"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test_cookie"

        # Simulate response with very short content
        short_content_result = {
            "type": "answer",
            "title": "Some Title",
            "content": "x",  # Very short content
            "content_markdown": "",
        }

        with patch.object(adapter, '_extract_with_playwright', return_value=short_content_result):
            with pytest.raises(AuthError) as exc_info:
                await adapter.fetch_metadata("789012", "answer")

        assert exc_info.value.auth_type == "zhihu_cookie"


class TestZhihuAdapterCookieHandling:
    """Tests for cookie handling"""

    def test_cookie_from_settings(self):
        """Test cookie is loaded from settings"""
        with patch('kb_pipeline.platforms.zhihu.get_settings') as mock_settings:
            mock_secret = MagicMock()
            mock_secret.get_secret_value.return_value = "test_cookie_value"
            mock_settings.return_value.zhihu_cookie = mock_secret

            adapter = ZhihuAdapter()
            assert adapter.cookie == "test_cookie_value"

    def test_platform_constant(self):
        """Test PLATFORM constant"""
        adapter = ZhihuAdapter()
        adapter._cookie = "test"  # Avoid config loading
        assert adapter.PLATFORM == "zhihu"