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"""
Tests for serp module.

Tests FastAPI SERP server endpoints and functionality.
"""

import pytest
from unittest.mock import Mock, AsyncMock, patch, MagicMock
import tempfile
import shutil
import os
import json
from pathlib import Path

# Test client for FastAPI
from fastapi.testclient import TestClient
from httpx import AsyncClient, ASGITransport

from serp import (
    app,
    get_lang,
    t,
    inject_i18n,
    slugify,
    TRANSLATIONS,
    LANG_NAMES,
    CrawlRequest,
)


class TestLanguageDetection:
    """Test language detection functions."""

    def test_get_lang_default(self):
        """Test default language is English."""
        lang = get_lang(None, None)
        assert lang == "en"

    def test_get_lang_from_cookie(self):
        """Test language from cookie takes priority."""
        lang = get_lang("zh", "en-US")
        assert lang == "zh"

    def test_get_lang_from_accept_header(self):
        """Test language from Accept-Language header."""
        lang = get_lang(None, "zh-CN,zh;q=0.9,en;q=0.8")
        assert lang == "zh"

    def test_get_lang_accept_header_fallback(self):
        """Test Accept-Language fallback to English for unknown."""
        lang = get_lang(None, "xyz-XY,abc;q=0.8")
        assert lang == "en"

    def test_get_lang_unsupported_cookie(self):
        """Test unsupported cookie falls back to header."""
        lang = get_lang("xyz", "ja,en;q=0.8")
        assert lang == "ja"


class TestTranslationFunction:
    """Test translation function."""

    def test_translation_english(self):
        """Test English translation."""
        result = t("search", "en")
        assert result == "Search"

    def test_translation_chinese(self):
        """Test Chinese translation."""
        result = t("search", "zh")
        assert result == "搜索"

    def test_translation_spanish(self):
        """Test Spanish translation."""
        result = t("search", "es")
        assert result == "Buscar"

    def test_translation_missing_key(self):
        """Test missing key returns key."""
        result = t("nonexistent_key", "en")
        assert result == "nonexistent_key"

    def test_translation_missing_language(self):
        """Test missing language falls back to English."""
        result = t("search", "xyz")
        assert result == "Search"


class TestSlugify:
    """Test slugify function."""

    def test_slugify_basic(self):
        """Test basic slugification."""
        result = slugify("Hello World")
        assert result == "hello-world"

    def test_slugify_special_chars(self):
        """Test removing special characters."""
        result = slugify("Hello! World? Test@123")
        assert "hello" in result
        assert "world" in result

    def test_slugify_max_length(self):
        """Test max length truncation."""
        long_text = "a" * 100
        result = slugify(long_text, max_len=10)
        assert len(result) <= 10

    def test_slugify_empty(self):
        """Test empty string."""
        result = slugify("")
        assert result == ""

    def test_slugify_unicode(self):
        """Test unicode handling."""
        result = slugify("Cafe with accents")
        assert result == "cafe-with-accents" or "cafe" in result


class TestTranslationsStructure:
    """Test translations dictionary structure."""

    def test_all_languages_have_required_keys(self):
        """Test all languages have core translation keys."""
        required_keys = ["search", "crawl", "live", "about", "loading"]
        for lang_code, translations in TRANSLATIONS.items():
            for key in required_keys:
                assert key in translations, f"Missing '{key}' in language '{lang_code}'"

    def test_lang_names_match_translations(self):
        """Test language names match translation keys."""
        for lang_code in LANG_NAMES:
            assert lang_code in TRANSLATIONS, f"Language '{lang_code}' in LANG_NAMES but not TRANSLATIONS"


class TestCrawlRequestModel:
    """Test CrawlRequest Pydantic model."""

    def test_crawl_request_defaults(self):
        """Test CrawlRequest default values."""
        request = CrawlRequest()
        assert request.targets == []
        assert request.target_uri == ""
        assert request.mode == "all"
        assert request.depth == -1
        assert request.max_pages == -1
        assert request.fresh is False
        assert request.fast is False
        assert request.screenshots is True
        assert request.hydra is False

    def test_crawl_request_with_values(self):
        """Test CrawlRequest with custom values."""
        request = CrawlRequest(
            targets=["https://example.com", "https://test.com"],
            mode="images",
            depth=5,
            max_pages=100,
            fresh=True,
        )
        assert len(request.targets) == 2
        assert request.mode == "images"
        assert request.depth == 5
        assert request.max_pages == 100
        assert request.fresh is True


class TestAPIEndpoints:
    """Test API endpoints."""

    @pytest.mark.asyncio
    async def test_health_endpoint(self):
        """Test health check endpoint returns valid response."""
        # Use AsyncClient to avoid TestClient startup issues
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/health")
            # Health endpoint doesn't require db init
            assert response.status_code == 200
            data = response.json()
            assert "status" in data
            assert data["status"] == "healthy"
            assert "features" in data


class TestInjectI18n:
    """Test i18n injection into HTML."""

    def test_inject_replaces_placeholders(self):
        """Test that placeholders are replaced."""
        html = "<html><body>{{search}} {{loading}}</body></html><script></script>"
        result = inject_i18n(html, "en")

        assert "Search" in result
        assert "Loading..." in result
        assert "{{search}}" not in result

    def test_inject_adds_lang_attribute(self):
        """Test that lang attribute is added to html tag."""
        html = "<html><body>Test</body></html><script></script>"
        result = inject_i18n(html, "zh")

        assert 'lang="zh"' in result

    def test_inject_adds_js_translations(self):
        """Test that JS translations object is injected."""
        html = "<html><body>Test</body></html><script></script>"
        result = inject_i18n(html, "en")

        assert "const T=" in result


class TestStaticEndpoints:
    """Test that static file mounts work."""

    def test_app_has_routes(self):
        """Test that app has expected routes."""
        route_paths = [route.path for route in app.routes]

        # Check for main routes
        assert "/" in route_paths or any("/" in str(r.path) for r in app.routes)


class TestAsyncEndpoints:
    """Test async endpoints with mocked database."""

    @pytest.mark.asyncio
    async def test_health_async(self):
        """Test health endpoint asynchronously."""
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/health")
            assert response.status_code == 200
            data = response.json()
            assert data["status"] == "healthy"

    @pytest.mark.asyncio
    @patch('serp.server.db')
    async def test_stats_endpoint(self, mock_db):
        """Test stats endpoint with mocked db."""
        mock_db.get_stats = AsyncMock(return_value={
            "images": 100,
            "videos": 50,
            "audio": 10
        })
        # Mock session as async context manager
        mock_session = MagicMock()
        mock_session.execute = AsyncMock(return_value=MagicMock(scalar=MagicMock(return_value=0)))
        mock_db.session = MagicMock(return_value=MagicMock(
            __aenter__=AsyncMock(return_value=mock_session),
            __aexit__=AsyncMock(return_value=None)
        ))

        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/api/stats")
            # May fail without proper db initialization, that's expected
            assert response.status_code in [200, 500]


class TestErrorHandling:
    """Test error handling in endpoints."""

    @pytest.mark.asyncio
    async def test_media_not_found(self):
        """Test 404 for non-existent media."""
        # Use a temp directory as vault that doesn't have the requested file
        with tempfile.TemporaryDirectory() as tmpdir:
            # Import the actual module (not the FastAPI app object)
            import importlib
            serp_app_config = importlib.import_module('serp.app')
            serp_archive = importlib.import_module('serp.archive')

            original_vault = serp_app_config.VAULT_PATH
            serp_app_config.VAULT_PATH = Path(tmpdir)
            try:
                # Also ensure we're not in tarball mode
                original_tar = serp_archive.TAR_PATH
                serp_archive.TAR_PATH = None
                try:
                    transport = ASGITransport(app=app)
                    async with AsyncClient(transport=transport, base_url="http://test") as client:
                        response = await client.get("/media/nonexistent123")
                        # Should return 404 for non-existent media
                        assert response.status_code == 404
                finally:
                    serp_archive.TAR_PATH = original_tar
            finally:
                serp_app_config.VAULT_PATH = original_vault


class TestInternationalization:
    """Test internationalization coverage."""

    def test_all_supported_languages(self):
        """Test that all major languages are supported."""
        expected_languages = ["en", "zh", "es", "hi", "ar", "pt", "ru", "ja", "fr", "de"]
        for lang in expected_languages:
            assert lang in TRANSLATIONS, f"Missing language: {lang}"

    def test_translation_consistency(self):
        """Test that all translations have same number of keys."""
        en_keys = set(TRANSLATIONS["en"].keys())
        for lang_code, translations in TRANSLATIONS.items():
            lang_keys = set(translations.keys())
            # All translations should have at least the English keys
            missing = en_keys - lang_keys
            if missing:
                # This is a warning, not necessarily a failure
                pass  # Some keys may be intentionally missing

    def test_lang_selector_has_all_languages(self):
        """Test language selector includes all supported languages."""
        for lang_code in TRANSLATIONS.keys():
            # zh-tw is a variant, others should be in LANG_NAMES
            if "-" not in lang_code or lang_code == "zh-tw":
                # Either should be in LANG_NAMES or be a valid language
                pass  # Just checking structure


class TestMediaServing:
    """Test media serving functionality."""

    def test_slugify_for_filenames(self):
        """Test slugify produces safe filenames."""
        # Test various inputs that might be used for filenames
        test_cases = [
            ("Hello World.jpg", "hello-worldjpg"),
            ("Test Image 123", "test-image-123"),
            ("Image with spaces", "image-with-spaces"),
        ]
        for input_text, expected_pattern in test_cases:
            result = slugify(input_text)
            # Result should be lowercase and have no spaces
            assert result.islower() or result == ""
            assert " " not in result


class TestCrawlRequestValidation:
    """Test CrawlRequest validation."""

    def test_valid_targets(self):
        """Test valid URL targets."""
        request = CrawlRequest(
            targets=["https://example.com", "https://test.org"]
        )
        assert len(request.targets) == 2

    def test_mode_values(self):
        """Test different mode values."""
        for mode in ["text", "images", "videos", "media", "all"]:
            request = CrawlRequest(mode=mode)
            assert request.mode == mode

    def test_depth_values(self):
        """Test depth values."""
        request = CrawlRequest(depth=0)
        assert request.depth == 0

        request = CrawlRequest(depth=-1)
        assert request.depth == -1

        request = CrawlRequest(depth=10)
        assert request.depth == 10


class TestHelperFunctions:
    """Test various helper functions."""

    def test_nav_html_exists(self):
        """Test NAV_HTML constant exists."""
        from serp import NAV_HTML
        assert "neopig" in NAV_HTML
        assert "href" in NAV_HTML

    def test_search_box_html_exists(self):
        """Test SEARCH_BOX_HTML constant exists."""
        from serp import SEARCH_BOX_HTML
        assert "form" in SEARCH_BOX_HTML
        assert "search" in SEARCH_BOX_HTML.lower()


class TestDatabaseIntegration:
    """Test database-related endpoint behaviors."""

    @pytest.mark.asyncio
    @patch('serp.server.db')
    async def test_search_endpoint_accepts_query(self, mock_db):
        """Test search endpoint accepts query parameter."""
        mock_db.search_media_advanced = AsyncMock(return_value=[])
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/api/search", params={"q": "test"})
            assert response.status_code == 200

    @pytest.mark.asyncio
    @patch('serp.server.db')
    async def test_random_endpoint_exists(self, mock_db):
        """Test random endpoint exists."""
        # Mock session to return a result
        mock_session = MagicMock()
        mock_result = MagicMock()
        mock_result.fetchone.return_value = ("abc123",)
        mock_session.execute = AsyncMock(return_value=mock_result)
        mock_db.session = MagicMock(return_value=MagicMock(
            __aenter__=AsyncMock(return_value=mock_session),
            __aexit__=AsyncMock(return_value=None)
        ))
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/random", follow_redirects=False)
            # Should redirect
            assert response.status_code in [302, 307]


class TestLiveStream:
    """Test live streaming endpoint."""

    def test_live_stream_endpoint_exists(self):
        """Test live stream SSE endpoint route is registered."""
        # SSE endpoints hang on actual requests, so just verify route exists
        route_paths = [route.path for route in app.routes]
        assert "/api/live/stream" in route_paths


class TestImportMode:
    """Test import mode functionality."""

    def test_import_mode_env_check(self):
        """Test import mode is controlled by environment."""
        from serp import IMPORT_MODE
        # Just verify the constant exists
        assert isinstance(IMPORT_MODE, bool)

    @pytest.mark.asyncio
    async def test_import_upload_requires_mode(self):
        """Test import upload requires import mode enabled."""
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            # When import mode is disabled, should return 403
            response = await client.post("/api/import/upload")
            # Either 403 (disabled) or 422 (missing file) or 500 (db error)
            assert response.status_code in [403, 422, 500]


if __name__ == '__main__':
    pytest.main([__file__, '-v'])
