"""
Deep behavioral tests for web.py pure logic.
Tests default settings structure, load_user_settings patterns,
health check response structure, and route context.
"""


# --- Default settings structure ---


class TestDefaultSettingsStructure:
    """Tests for default settings dictionary structure."""

    def _get_default_settings(self):
        return {
            "iterations": 3,
            "questions_per_iteration": 5,
            "search_engine": "auto",
            "model_provider": "OLLAMA",
            "model": "",
            "search_strategy": "source-based",
        }

    def test_iterations_default(self):
        settings = self._get_default_settings()
        assert settings["iterations"] == 3

    def test_questions_per_iteration_default(self):
        settings = self._get_default_settings()
        assert settings["questions_per_iteration"] == 5

    def test_search_engine_default(self):
        settings = self._get_default_settings()
        assert settings["search_engine"] == "auto"

    def test_model_provider_default(self):
        settings = self._get_default_settings()
        assert settings["model_provider"] == "OLLAMA"

    def test_model_default_empty(self):
        settings = self._get_default_settings()
        assert settings["model"] == ""

    def test_search_strategy_default(self):
        settings = self._get_default_settings()
        assert settings["search_strategy"] == "source-based"

    def test_all_keys_present(self):
        settings = self._get_default_settings()
        expected_keys = {
            "iterations",
            "questions_per_iteration",
            "search_engine",
            "model_provider",
            "model",
            "search_strategy",
        }
        assert set(settings.keys()) == expected_keys


# --- Load user settings update pattern ---


class TestLoadUserSettingsUpdatePattern:
    """Tests for load_user_settings dictionary update."""

    def _load_user_settings(self, settings, values):
        settings.update(
            {
                "iterations": values.get("iterations", 3),
                "questions_per_iteration": values.get(
                    "questions_per_iteration", 5
                ),
                "search_engine": values.get("search_engine", "auto"),
                "model_provider": values.get("model_provider", "OLLAMA"),
                "model": values.get("model", ""),
                "search_strategy": values.get(
                    "search_strategy", "source-based"
                ),
                "custom_endpoint": values.get("custom_endpoint", ""),
            }
        )

    def test_updates_iterations(self):
        settings = {}
        self._load_user_settings(settings, {"iterations": 5})
        assert settings["iterations"] == 5

    def test_updates_model(self):
        settings = {}
        self._load_user_settings(settings, {"model": "gpt-4"})
        assert settings["model"] == "gpt-4"

    def test_adds_custom_endpoint(self):
        settings = {}
        self._load_user_settings(
            settings, {"custom_endpoint": "http://localhost"}
        )
        assert settings["custom_endpoint"] == "http://localhost"

    def test_preserves_defaults_for_missing(self):
        settings = {}
        self._load_user_settings(settings, {"iterations": 10})
        assert settings["model_provider"] == "OLLAMA"
        assert settings["search_engine"] == "auto"


# --- Anonymous user check ---


class TestAnonymousUserCheck:
    """Tests for anonymous user detection."""

    def _is_anonymous(self, username):
        return username == "anonymous"

    def test_anonymous_user(self):
        assert self._is_anonymous("anonymous") is True

    def test_regular_user(self):
        assert self._is_anonymous("alice") is False

    def test_empty_string(self):
        assert self._is_anonymous("") is False

    def test_none_username(self):
        # None != "anonymous"
        assert self._is_anonymous(None) is False


class TestShouldLoadUserSettings:
    """Tests for condition to load user settings."""

    def _should_load_settings(self, username):
        return username != "anonymous"

    def test_load_for_real_user(self):
        assert self._should_load_settings("alice") is True

    def test_skip_for_anonymous(self):
        assert self._should_load_settings("anonymous") is False


# --- Health check response structure ---


class TestHealthCheckResponse:
    """Tests for health check response structures."""

    def _healthy_response(self):
        return {
            "status": "healthy",
            "enabled": True,
            "database": "connected",
        }

    def _unhealthy_response(self):
        return {
            "status": "unhealthy",
            "error": "An internal error has occurred.",
        }

    def test_healthy_status(self):
        response = self._healthy_response()
        assert response["status"] == "healthy"

    def test_healthy_enabled(self):
        response = self._healthy_response()
        assert response["enabled"] is True

    def test_healthy_database(self):
        response = self._healthy_response()
        assert response["database"] == "connected"

    def test_unhealthy_status(self):
        response = self._unhealthy_response()
        assert response["status"] == "unhealthy"

    def test_unhealthy_error_message(self):
        response = self._unhealthy_response()
        assert "error" in response
        # Should not leak internal details
        assert "internal" in response["error"].lower()


# --- Available strategies list ---


class TestAvailableStrategies:
    """Tests for available strategy list."""

    def _get_strategies(self):
        return [
            "topic_based",
            "news_aggregation",
            "source_based",
            "focused_iteration",
        ]

    def test_has_topic_based(self):
        assert "topic_based" in self._get_strategies()

    def test_has_news_aggregation(self):
        assert "news_aggregation" in self._get_strategies()

    def test_has_source_based(self):
        assert "source_based" in self._get_strategies()

    def test_has_focused_iteration(self):
        assert "focused_iteration" in self._get_strategies()

    def test_exactly_four_strategies(self):
        assert len(self._get_strategies()) == 4


class TestDefaultStrategy:
    """Tests for default strategy selection."""

    def test_default_is_topic_based(self):
        default_strategy = "topic_based"
        assert default_strategy == "topic_based"


# --- Subscription page context ---


class TestSubscriptionPageContext:
    """Tests for subscription form page context."""

    def _build_new_subscription_context(self, default_settings):
        return {
            "subscription": None,
            "default_settings": default_settings,
        }

    def _build_edit_subscription_context(self, subscription, default_settings):
        return {
            "subscription": subscription,
            "default_settings": default_settings,
        }

    def test_new_has_none_subscription(self):
        ctx = self._build_new_subscription_context({})
        assert ctx["subscription"] is None

    def test_new_has_default_settings(self):
        settings = {"iterations": 3}
        ctx = self._build_new_subscription_context(settings)
        assert ctx["default_settings"]["iterations"] == 3

    def test_edit_has_subscription(self):
        sub = {"id": "sub-123", "name": "AI News"}
        ctx = self._build_edit_subscription_context(sub, {})
        assert ctx["subscription"]["id"] == "sub-123"


class TestSubscriptionNotFoundContext:
    """Tests for subscription not found error context."""

    def _build_not_found_context(self, default_settings):
        return {
            "subscription": None,
            "error": "Subscription not found",
            "default_settings": default_settings,
        }

    def test_has_error_message(self):
        ctx = self._build_not_found_context({})
        assert ctx["error"] == "Subscription not found"

    def test_subscription_is_none(self):
        ctx = self._build_not_found_context({})
        assert ctx["subscription"] is None


class TestSubscriptionErrorContext:
    """Tests for subscription load error context."""

    def _build_error_context(self, default_settings):
        return {
            "subscription": None,
            "error": "Error loading subscription",
            "default_settings": default_settings,
        }

    def test_has_generic_error(self):
        ctx = self._build_error_context({})
        assert "Error" in ctx["error"]


# --- Session username extraction ---


class TestSessionUsernameExtraction:
    """Tests for extracting username from session."""

    def _get_username(self, session):
        return session.get("username", "anonymous")

    def test_has_username(self):
        session = {"username": "alice"}
        assert self._get_username(session) == "alice"

    def test_missing_username_defaults_anonymous(self):
        session = {}
        assert self._get_username(session) == "anonymous"

    def test_none_session_key(self):
        session = {"username": None}
        # None is returned, not "anonymous" (get returns the value)
        assert self._get_username(session) is None


# --- Settings manager key mapping ---


class TestSettingsManagerKeyMapping:
    """Tests for settings key to manager key mapping."""

    KEY_MAP = {
        "iterations": "search.iterations",
        "questions_per_iteration": "search.questions_per_iteration",
        "search_engine": "search.tool",
        "model_provider": "llm.provider",
        "model": "llm.model",
        "search_strategy": "search.search_strategy",
        "custom_endpoint": "llm.openai_endpoint.url",
    }

    def test_iterations_key(self):
        assert self.KEY_MAP["iterations"] == "search.iterations"

    def test_search_engine_key(self):
        assert self.KEY_MAP["search_engine"] == "search.tool"

    def test_model_provider_key(self):
        assert self.KEY_MAP["model_provider"] == "llm.provider"

    def test_custom_endpoint_key(self):
        assert self.KEY_MAP["custom_endpoint"] == "llm.openai_endpoint.url"


# --- Blueprint registration ---


class TestBlueprintRoutes:
    """Tests for expected blueprint routes."""

    def _get_expected_routes(self):
        return [
            "/",
            "/subscriptions",
            "/subscriptions/new",
            "/subscriptions/<subscription_id>/edit",
            "/health",
        ]

    def test_has_main_route(self):
        assert "/" in self._get_expected_routes()

    def test_has_subscriptions_route(self):
        assert "/subscriptions" in self._get_expected_routes()

    def test_has_new_subscription_route(self):
        assert "/subscriptions/new" in self._get_expected_routes()

    def test_has_edit_subscription_route(self):
        routes = self._get_expected_routes()
        assert any("edit" in r for r in routes)

    def test_has_health_route(self):
        assert "/health" in self._get_expected_routes()


# --- Template names ---


class TestTemplateNames:
    """Tests for expected template names."""

    TEMPLATES = {
        "main": "pages/news.html",
        "subscriptions": "pages/subscriptions.html",
        "subscription_form": "pages/news-subscription-form.html",
    }

    def test_main_template(self):
        assert self.TEMPLATES["main"] == "pages/news.html"

    def test_subscriptions_template(self):
        assert self.TEMPLATES["subscriptions"] == "pages/subscriptions.html"

    def test_subscription_form_template(self):
        assert (
            self.TEMPLATES["subscription_form"]
            == "pages/news-subscription-form.html"
        )


# --- Load user settings guard ---


class TestLoadUserSettingsGuard:
    """Tests for load_user_settings guard conditions."""

    def _should_skip(self, db_session):
        return not db_session

    def test_skip_if_none(self):
        assert self._should_skip(None) is True

    def test_proceed_if_session(self):
        assert self._should_skip("mock_session") is False
