"""Tests for NFO API endpoints.

This module tests all NFO management REST API endpoints.
"""
from unittest.mock import AsyncMock, Mock, patch

import pytest
from httpx import ASGITransport, AsyncClient

from src.server.fastapi_app import app
from src.server.models.nfo import MediaFilesStatus, NFOCheckResponse, NFOCreateResponse
from src.server.services.auth_service import auth_service


@pytest.fixture(autouse=True)
def reset_auth():
    """Reset authentication state before each test."""
    original_hash = auth_service._hash
    auth_service._hash = None
    auth_service._failed.clear()
    yield
    auth_service._hash = original_hash
    auth_service._failed.clear()


@pytest.fixture
async def client():
    """Create an async test client."""
    transport = ASGITransport(app=app)
    async with AsyncClient(transport=transport, base_url="http://test") as ac:
        yield ac


@pytest.fixture
async def authenticated_client(client):
    """Create an authenticated test client with token."""
    # Setup master password
    await client.post(
        "/api/auth/setup",
        json={"master_password": "TestPassword123!"}
    )
    
    # Login to get token
    response = await client.post(
        "/api/auth/login",
        json={"password": "TestPassword123!"}
    )
    token = response.json()["access_token"]
    
    # Add token to default headers
    client.headers.update({"Authorization": f"Bearer {token}"})
    yield client


@pytest.fixture
def mock_series_app():
    """Create mock series app."""
    app_mock = Mock()
    serie = Mock()
    serie.key = "test-anime"
    serie.folder = "Test Anime (2024)"
    serie.name = "Test Anime"
    serie.ensure_folder_with_year = Mock(return_value="Test Anime (2024)")
    
    # Mock the list manager
    list_manager = Mock()
    list_manager.GetList = Mock(return_value=[serie])
    app_mock.list = list_manager
    
    return app_mock


@pytest.fixture
def mock_nfo_service():
    """Create mock NFO service."""
    service = Mock()
    service.check_nfo_exists = AsyncMock(return_value=False)
    service.create_tvshow_nfo = AsyncMock(return_value="/path/to/tvshow.nfo")
    service.update_tvshow_nfo = AsyncMock(return_value="/path/to/tvshow.nfo")
    return service


@pytest.fixture
def override_nfo_service_for_auth_tests():
    """Placeholder fixture for auth tests.
    
    Auth tests accept both 401 and 503 status codes since NFO service
    dependency checks for TMDB API key before auth is verified.
    """
    yield


@pytest.fixture
def override_dependencies(mock_series_app, mock_nfo_service):
    """Override dependencies for authenticated NFO tests."""
    from src.server.api.nfo import get_nfo_service
    from src.server.utils.dependencies import get_series_app
    
    app.dependency_overrides[get_series_app] = lambda: mock_series_app
    app.dependency_overrides[get_nfo_service] = lambda: mock_nfo_service
    
    yield
    
    # Clean up only our overrides
    if get_series_app in app.dependency_overrides:
        del app.dependency_overrides[get_series_app]
    if get_nfo_service in app.dependency_overrides:
        del app.dependency_overrides[get_nfo_service]


class TestNFOCheckEndpoint:
    """Tests for GET /api/nfo/{serie_id}/check endpoint."""

    @pytest.mark.asyncio
    async def test_check_nfo_requires_auth(
        self,
        override_nfo_service_for_auth_tests,
        client
    ):
        """Test that check endpoint requires authentication.
        
        Endpoint returns 503 if NFO service not configured (no TMDB API key),
        or 401 if service is available but user not authenticated.
        Both indicate endpoint is protected.
        """
        response = await client.get("/api/nfo/test-anime/check")
        assert response.status_code in (401, 503)

    @pytest.mark.asyncio
    async def test_check_nfo_series_not_found(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        override_dependencies
    ):
        """Test check endpoint with non-existent series."""
        mock_series_app.list.GetList = Mock(return_value=[])
        
        response = await authenticated_client.get(
            "/api/nfo/nonexistent/check"
        )
        assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_check_nfo_success(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test successful NFO check."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.get(
                "/api/nfo/test-anime/check"
            )
            assert response.status_code == 200
            data = response.json()
            assert data["serie_id"] == "test-anime"
            assert data["serie_folder"] == "Test Anime (2024)"
            assert data["has_nfo"] is False


class TestNFOCreateEndpoint:
    """Tests for POST /api/nfo/{serie_id}/create endpoint."""

    @pytest.mark.asyncio
    async def test_create_nfo_requires_auth(
        self,
        client,
        override_nfo_service_for_auth_tests
    ):
        """Test that create endpoint requires authentication."""
        response = await client.post(
            "/api/nfo/test-anime/create",
            json={}
        )
        assert response.status_code in (401, 503)

    @pytest.mark.asyncio
    async def test_create_nfo_success(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test successful NFO creation."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.post(
                "/api/nfo/test-anime/create",
                json={
                    "download_poster": True,
                    "download_logo": True,
                    "download_fanart": True
                }
            )
            assert response.status_code == 200
            data = response.json()
            assert data["serie_id"] == "test-anime"
            assert "NFO and media files created" in data["message"]

    @pytest.mark.asyncio
    async def test_create_nfo_already_exists(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test NFO creation when NFO already exists."""
        mock_nfo_service.check_nfo_exists = AsyncMock(return_value=True)
        
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.post(
                "/api/nfo/test-anime/create",
                json={"overwrite_existing": False}
            )
            assert response.status_code == 409

    @pytest.mark.asyncio
    async def test_create_nfo_with_year(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test NFO creation with year parameter."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.post(
                "/api/nfo/test-anime/create",
                json={
                    "year": 2024,
                    "download_poster": True
                }
            )
            assert response.status_code == 200
            
            # Verify year was passed to service
            mock_nfo_service.create_tvshow_nfo.assert_called_once()
            call_kwargs = mock_nfo_service.create_tvshow_nfo.call_args[1]
            assert call_kwargs["year"] == 2024


class TestNFOUpdateEndpoint:
    """Tests for PUT /api/nfo/{serie_id}/update endpoint."""

    @pytest.mark.asyncio
    async def test_update_nfo_requires_auth(
        self,
        client,
        override_nfo_service_for_auth_tests
    ):
        """Test that update endpoint requires authentication."""
        response = await client.put("/api/nfo/test-anime/update")
        assert response.status_code in (401, 503)

    @pytest.mark.asyncio
    async def test_update_nfo_not_found(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test update when NFO doesn't exist."""
        mock_nfo_service.check_nfo_exists = AsyncMock(return_value=False)
        
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.put(
                "/api/nfo/test-anime/update"
            )
            assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_update_nfo_success(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test successful NFO update."""
        mock_nfo_service.check_nfo_exists = AsyncMock(return_value=True)
        
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.put(
                "/api/nfo/test-anime/update?download_media=true"
            )
            assert response.status_code == 200
            data = response.json()
            assert "NFO updated successfully" in data["message"]


class TestNFOContentEndpoint:
    """Tests for GET /api/nfo/{serie_id}/content endpoint."""

    @pytest.mark.asyncio
    async def test_get_content_requires_auth(
        self,
        client,
        override_nfo_service_for_auth_tests
    ):
        """Test that content endpoint requires authentication."""
        response = await client.get("/api/nfo/test-anime/content")
        assert response.status_code in (401, 503)

    @pytest.mark.asyncio
    async def test_get_content_nfo_not_found(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test get content when NFO doesn't exist."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.get(
                "/api/nfo/test-anime/content"
            )
            assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_get_content_success(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test successful content retrieval."""
        # Create NFO file
        anime_dir = tmp_path / "Test Anime (2024)"
        anime_dir.mkdir()
        nfo_file = anime_dir / "tvshow.nfo"
        nfo_file.write_text("<tvshow><title>Test</title></tvshow>")
        
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.get(
                "/api/nfo/test-anime/content"
            )
            assert response.status_code == 200
            data = response.json()
            assert "<tvshow>" in data["content"]
            assert data["file_size"] > 0


class TestNFOMissingEndpoint:
    """Tests for GET /api/nfo/missing endpoint."""

    @pytest.mark.asyncio
    async def test_get_missing_requires_auth(
        self,
        client,
        override_nfo_service_for_auth_tests
    ):
        """Test that missing endpoint requires authentication."""
        response = await client.get("/api/nfo/missing")
        assert response.status_code in (401, 503)

    @pytest.mark.asyncio
    async def test_get_missing_success(
        self,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path,
        override_dependencies
    ):
        """Test getting list of series without NFO."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.get("/api/nfo/missing")
            assert response.status_code == 200
            data = response.json()
            assert "total_series" in data
            assert "missing_nfo_count" in data
            assert "series" in data


class TestNFOBatchCreateEndpoint:
    """Tests for POST /api/nfo/batch/create endpoint."""

    @pytest.mark.asyncio
    async def test_batch_create_requires_auth(
        self,
        client,
        override_nfo_service_for_auth_tests
    ):
        """Test that batch create endpoint requires authentication."""
        response = await client.post(
            "/api/nfo/batch/create",
            json={"serie_ids": ["test1", "test2"]}
        )
        assert response.status_code in (401, 503)

    @pytest.mark.skip(
        reason="TODO: Fix dependency override timing with authenticated_client"
    )
    @pytest.mark.asyncio
    async def test_batch_create_success(
        self,
        override_dependencies,
        authenticated_client,
        mock_series_app,
        mock_nfo_service,
        tmp_path
    ):
        """Test successful batch NFO creation."""
        with patch('src.server.api.nfo.settings') as mock_settings:
            mock_settings.anime_directory = str(tmp_path)
            
            response = await authenticated_client.post(
                "/api/nfo/batch/create",
                json={
                    "serie_ids": ["test-anime"],
                    "download_media": True,
                    "skip_existing": False,
                    "max_concurrent": 3
                }
            )
            assert response.status_code == 200
            data = response.json()
            assert data["total"] == 1
            assert "successful" in data
            assert "results" in data


class TestNFOServiceDependency:
    """Tests for NFO service dependency."""

    @pytest.mark.asyncio
    async def test_nfo_service_unavailable_without_api_key(
        self,
        authenticated_client
    ):
        """Test NFO endpoints fail gracefully without TMDB API key.
        
        This test verifies that when the NFO service dependency raises an
        HTTPException 503 due to missing TMDB API key, the endpoint returns 503.
        """
        from fastapi import HTTPException, status

        from src.server.api.nfo import get_nfo_service

        # Create a dependency that raises HTTPException 503 (simulating missing API key)
        async def fail_nfo_service():
            raise HTTPException(
                status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
                detail="NFO service not configured: TMDB API key not available"
            )
        
        # Override NFO service to simulate missing API key
        app.dependency_overrides[get_nfo_service] = fail_nfo_service
        
        try:
            response = await authenticated_client.get(
                "/api/nfo/test-anime/check"
            )
            assert response.status_code == 503
            data = response.json()
            assert "not configured" in data["detail"]
        finally:
            # Clean up override
            if get_nfo_service in app.dependency_overrides:
                del app.dependency_overrides[get_nfo_service]