"""Tests for server cache control middleware"""
import pytest
from aiohttp import web
from aiohttp.test_utils import make_mocked_request
from unittest.mock import patch

pytestmark = pytest.mark.asyncio  # Apply asyncio mark to all tests

# Mock the problematic imports before importing server
with patch('app.frontend_management.FrontendManager'), patch('utils.install_util.get_missing_requirements_message'), patch('utils.install_util.requirements_path'):
    from server import cache_control, ONE_HOUR, ONE_DAY, IMG_EXTENSIONS


class TestCacheControl:
    """Test cache control middleware functionality"""

    @pytest.fixture
    def mock_handler(self):
        """Create a mock handler that returns a response with 200 status"""
        async def handler(request):
            return web.Response(status=200)
        return handler

    @pytest.fixture
    def mock_handler_404(self):
        """Create a mock handler that returns a 404 response"""
        async def handler(request):
            return web.Response(status=404)
        return handler


    async def test_image_extensions_200_status(self, mock_handler):
        """Test that images with 200 status get 24-hour cache"""
        for ext in IMG_EXTENSIONS:
            request = make_mocked_request('GET', f'/test{ext}')
            response = await cache_control(request, mock_handler)

            assert response.status == 200
            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_image_extensions_404_status(self, mock_handler_404):
        """Test that images with 404 status get 1-hour cache"""
        request = make_mocked_request('GET', '/missing.jpg')
        response = await cache_control(request, mock_handler_404)

        assert response.status == 404
        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == f'public, max-age={ONE_HOUR}'

    async def test_case_insensitive_image_extension(self, mock_handler):
        """Test that image extensions are matched case-insensitively"""
        test_paths = ['/image.JPG', '/photo.PNG', '/pic.JpEg']

        for path in test_paths:
            request = make_mocked_request('GET', path)
            response = await cache_control(request, mock_handler)

            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_js_files_no_cache(self, mock_handler):
        """Test that .js files get no-cache header"""
        request = make_mocked_request('GET', '/script.js')
        response = await cache_control(request, mock_handler)

        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == 'no-cache'

    async def test_css_files_no_cache(self, mock_handler):
        """Test that .css files get no-cache header"""
        request = make_mocked_request('GET', '/styles.css')
        response = await cache_control(request, mock_handler)

        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == 'no-cache'

    async def test_index_json_no_cache(self, mock_handler):
        """Test that index.json gets no-cache header"""
        request = make_mocked_request('GET', '/api/index.json')
        response = await cache_control(request, mock_handler)

        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == 'no-cache'

    async def test_js_css_preserves_existing_headers(self):
        """Test that .js/.css files preserve existing Cache-Control headers"""
        async def handler_with_cache(request):
            return web.Response(status=200, headers={'Cache-Control': 'max-age=3600'})

        request = make_mocked_request('GET', '/script.js')
        response = await cache_control(request, handler_with_cache)

        # setdefault should preserve existing header
        assert response.headers['Cache-Control'] == 'max-age=3600'

    async def test_image_preserves_existing_headers(self):
        """Test that image cache headers preserve existing Cache-Control"""
        async def handler_with_cache(request):
            return web.Response(status=200, headers={'Cache-Control': 'private, no-cache'})

        request = make_mocked_request('GET', '/image.jpg')
        response = await cache_control(request, handler_with_cache)

        # setdefault should preserve existing header
        assert response.headers['Cache-Control'] == 'private, no-cache'

    async def test_non_matching_files_unchanged(self, mock_handler):
        """Test that non-matching files don't get cache headers"""
        test_paths = ['/index.html', '/data.txt', '/api/endpoint', '/file.pdf']

        for path in test_paths:
            request = make_mocked_request('GET', path)
            response = await cache_control(request, mock_handler)

            assert 'Cache-Control' not in response.headers

    async def test_query_strings_ignored(self, mock_handler):
        """Test that query strings don't affect image detection"""
        request = make_mocked_request('GET', '/image.jpg?v=123&size=large')
        response = await cache_control(request, mock_handler)

        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_multiple_dots_in_path(self, mock_handler):
        """Test files with multiple dots still match correctly"""
        request = make_mocked_request('GET', '/image.min.jpg')
        response = await cache_control(request, mock_handler)

        assert 'Cache-Control' in response.headers
        assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'


    async def test_2xx_success_statuses_get_long_cache(self):
        """Test that all 2xx success statuses get 24-hour cache for images"""
        success_statuses = [200, 201, 202, 204, 206]

        for status in success_statuses:
            async def handler_success(request):
                return web.Response(status=status)

            request = make_mocked_request('GET', '/success.jpg')
            response = await cache_control(request, handler_success)

            assert response.status == status
            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_permanent_redirects_get_long_cache(self):
        """Test that permanent redirects (301, 308) get 24-hour cache for images"""
        permanent_redirects = [301, 308]

        for status in permanent_redirects:
            async def handler_redirect(request):
                return web.Response(status=status)

            request = make_mocked_request('GET', '/permanent.jpg')
            response = await cache_control(request, handler_redirect)

            assert response.status == status
            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_temporary_redirects_get_no_cache(self):
        """Test that temporary redirects (302, 303, 307) get no-cache for images"""
        temporary_redirects = [302, 303, 307]

        for status in temporary_redirects:
            async def handler_redirect(request):
                return web.Response(status=status)

            request = make_mocked_request('GET', '/temporary.png')
            response = await cache_control(request, handler_redirect)

            assert response.status == status
            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == 'no-cache'

    async def test_304_not_modified_inherits_cache(self):
        """Test that 304 Not Modified doesn't set cache headers for images"""
        async def handler_304(request):
            return web.Response(status=304, headers={'Cache-Control': 'max-age=7200'})

        request = make_mocked_request('GET', '/not-modified.jpg')
        response = await cache_control(request, handler_304)

        assert response.status == 304
        # Should preserve existing cache header, not override
        assert response.headers['Cache-Control'] == 'max-age=7200'

    async def test_all_image_extensions(self, mock_handler):
        """Test all defined image extensions are handled"""
        expected_extensions = ('.jpg', '.jpeg', '.png', '.ppm', '.bmp', '.pgm', '.tif', '.tiff', '.webp')
        assert IMG_EXTENSIONS == expected_extensions

        for ext in IMG_EXTENSIONS:
            request = make_mocked_request('GET', f'/image{ext}')
            response = await cache_control(request, mock_handler)

            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'

    async def test_nested_paths_with_images(self, mock_handler):
        """Test that images in nested paths are handled correctly"""
        test_paths = [
            '/static/images/photo.jpg',
            '/assets/img/banner.png',
            '/uploads/2024/12/image.webp'
        ]

        for path in test_paths:
            request = make_mocked_request('GET', path)
            response = await cache_control(request, mock_handler)

            assert 'Cache-Control' in response.headers
            assert response.headers['Cache-Control'] == f'public, max-age={ONE_DAY}'