"""
Deep behavioral tests for API response building patterns.
Tests response structure construction, error formatting,
pagination patterns, and data transformation logic.
"""

from datetime import datetime, timezone, timedelta


# --- Success response patterns ---


class TestSuccessResponsePattern:
    """Tests for success response construction."""

    def _success(self, data, message=None):
        response = {"success": True, "data": data}
        if message:
            response["message"] = message
        return response

    def test_always_has_success_true(self):
        response = self._success({})
        assert response["success"] is True

    def test_includes_data(self):
        response = self._success({"items": [1, 2, 3]})
        assert response["data"]["items"] == [1, 2, 3]

    def test_optional_message(self):
        response = self._success({}, "Operation completed")
        assert response["message"] == "Operation completed"

    def test_no_message_key_when_not_provided(self):
        response = self._success({})
        assert "message" not in response

    def test_nested_data(self):
        response = self._success({"user": {"id": "1", "name": "test"}})
        assert response["data"]["user"]["name"] == "test"

    def test_empty_data(self):
        response = self._success({})
        assert response["data"] == {}

    def test_list_data(self):
        response = self._success([1, 2, 3])
        assert response["data"] == [1, 2, 3]


# --- Error response patterns ---


class TestErrorResponsePattern:
    """Tests for error response construction."""

    def _error(self, message, code=None, details=None):
        response = {"success": False, "error": message}
        if code:
            response["error_code"] = code
        if details:
            response["details"] = details
        return response

    def test_always_has_success_false(self):
        response = self._error("Error message")
        assert response["success"] is False

    def test_includes_error_message(self):
        response = self._error("Something went wrong")
        assert response["error"] == "Something went wrong"

    def test_optional_error_code(self):
        response = self._error("Error", "INVALID_INPUT")
        assert response["error_code"] == "INVALID_INPUT"

    def test_no_code_key_when_not_provided(self):
        response = self._error("Error")
        assert "error_code" not in response

    def test_optional_details(self):
        response = self._error("Error", details={"field": "name"})
        assert response["details"]["field"] == "name"


class TestHTTPErrorCodes:
    """Tests for HTTP error code patterns."""

    def test_400_bad_request(self):
        error = {"code": 400, "message": "Bad request"}
        assert error["code"] == 400

    def test_401_unauthorized(self):
        error = {"code": 401, "message": "Unauthorized"}
        assert error["code"] == 401

    def test_403_forbidden(self):
        error = {"code": 403, "message": "Forbidden"}
        assert error["code"] == 403

    def test_404_not_found(self):
        error = {"code": 404, "message": "Not found"}
        assert error["code"] == 404

    def test_409_conflict(self):
        error = {"code": 409, "message": "Conflict"}
        assert error["code"] == 409

    def test_500_internal_error(self):
        error = {"code": 500, "message": "Internal server error"}
        assert error["code"] == 500


# --- List response patterns ---


class TestListResponsePattern:
    """Tests for list response with pagination."""

    def _list_response(self, items, total, offset=0, limit=50):
        return {
            "success": True,
            "data": {
                "items": items,
                "total": total,
                "offset": offset,
                "limit": limit,
                "has_more": offset + len(items) < total,
            },
        }

    def test_includes_items(self):
        response = self._list_response([1, 2, 3], 3)
        assert response["data"]["items"] == [1, 2, 3]

    def test_includes_total(self):
        response = self._list_response([1, 2], 10)
        assert response["data"]["total"] == 10

    def test_includes_offset(self):
        response = self._list_response([1, 2], 10, offset=5)
        assert response["data"]["offset"] == 5

    def test_includes_limit(self):
        response = self._list_response([1, 2], 10, limit=20)
        assert response["data"]["limit"] == 20

    def test_has_more_true(self):
        response = self._list_response([1, 2], 10, offset=0)
        assert response["data"]["has_more"] is True

    def test_has_more_false_all_items(self):
        response = self._list_response([1, 2, 3], 3)
        assert response["data"]["has_more"] is False

    def test_has_more_false_last_page(self):
        response = self._list_response([9, 10], 10, offset=8)
        assert response["data"]["has_more"] is False

    def test_empty_items(self):
        response = self._list_response([], 0)
        assert response["data"]["items"] == []
        assert response["data"]["has_more"] is False


# --- Subscription response patterns ---


class TestSubscriptionResponsePattern:
    """Tests for subscription-specific response patterns."""

    def _format_subscription(self, sub):
        return {
            "id": sub["id"],
            "name": sub.get("name") or "",
            "query_or_topic": sub["query_or_topic"],
            "subscription_type": sub["subscription_type"],
            "refresh_interval_minutes": sub.get("refresh_interval_minutes", 60),
            "is_active": sub.get("status") == "active",
            "status": sub.get("status", "active"),
            "next_refresh": sub.get("next_refresh"),
            "last_refresh": sub.get("last_refresh"),
            "created_at": sub.get("created_at"),
        }

    def test_includes_id(self):
        sub = {
            "id": "sub-123",
            "query_or_topic": "AI",
            "subscription_type": "topic",
        }
        result = self._format_subscription(sub)
        assert result["id"] == "sub-123"

    def test_name_defaults_empty(self):
        sub = {"id": "1", "query_or_topic": "AI", "subscription_type": "topic"}
        result = self._format_subscription(sub)
        assert result["name"] == ""

    def test_is_active_from_status(self):
        sub = {
            "id": "1",
            "query_or_topic": "AI",
            "subscription_type": "topic",
            "status": "active",
        }
        result = self._format_subscription(sub)
        assert result["is_active"] is True

    def test_not_active_when_paused(self):
        sub = {
            "id": "1",
            "query_or_topic": "AI",
            "subscription_type": "topic",
            "status": "paused",
        }
        result = self._format_subscription(sub)
        assert result["is_active"] is False

    def test_default_refresh_interval(self):
        sub = {"id": "1", "query_or_topic": "AI", "subscription_type": "topic"}
        result = self._format_subscription(sub)
        assert result["refresh_interval_minutes"] == 60


# --- Card response patterns ---


class TestCardResponsePattern:
    """Tests for card-specific response patterns."""

    def _format_card(self, card):
        return {
            "id": card["id"],
            "card_type": card.get("card_type", "news"),
            "headline": card.get("headline", ""),
            "summary": card.get("summary", ""),
            "category": card.get("category", "General"),
            "impact_score": card.get("impact_score", 5),
            "created_at": card.get("created_at"),
            "topics": card.get("topics", []),
            "source": card.get("source", {}),
        }

    def test_includes_id(self):
        card = {"id": "card-123"}
        result = self._format_card(card)
        assert result["id"] == "card-123"

    def test_default_card_type(self):
        card = {"id": "1"}
        result = self._format_card(card)
        assert result["card_type"] == "news"

    def test_default_impact_score(self):
        card = {"id": "1"}
        result = self._format_card(card)
        assert result["impact_score"] == 5

    def test_default_category(self):
        card = {"id": "1"}
        result = self._format_card(card)
        assert result["category"] == "General"

    def test_topics_defaults_empty(self):
        card = {"id": "1"}
        result = self._format_card(card)
        assert result["topics"] == []


# --- Feed response patterns ---


class TestFeedResponsePattern:
    """Tests for feed-specific response patterns."""

    def _format_feed(self, cards, user_id, total, filters=None):
        return {
            "success": True,
            "data": {
                "cards": cards,
                "total": total,
                "user_id": user_id,
                "filters": filters or {},
            },
        }

    def test_includes_cards(self):
        response = self._format_feed([{"id": "1"}], "u1", 1)
        assert len(response["data"]["cards"]) == 1

    def test_includes_user_id(self):
        response = self._format_feed([], "user-123", 0)
        assert response["data"]["user_id"] == "user-123"

    def test_includes_total(self):
        response = self._format_feed([{}, {}], "u1", 10)
        assert response["data"]["total"] == 10

    def test_includes_filters(self):
        filters = {"category": "Tech"}
        response = self._format_feed([], "u1", 0, filters)
        assert response["data"]["filters"]["category"] == "Tech"

    def test_empty_filters_default(self):
        response = self._format_feed([], "u1", 0)
        assert response["data"]["filters"] == {}


# --- Stats response patterns ---


class TestStatsResponsePattern:
    """Tests for statistics response patterns."""

    def _format_stats(self, subscriptions, votes_up, votes_down, views):
        return {
            "success": True,
            "data": {
                "subscriptions": subscriptions,
                "votes_up": votes_up,
                "votes_down": votes_down,
                "total_views": views,
            },
        }

    def test_includes_subscriptions(self):
        response = self._format_stats(5, 10, 2, 100)
        assert response["data"]["subscriptions"] == 5

    def test_includes_votes(self):
        response = self._format_stats(0, 15, 3, 0)
        assert response["data"]["votes_up"] == 15
        assert response["data"]["votes_down"] == 3

    def test_includes_views(self):
        response = self._format_stats(0, 0, 0, 500)
        assert response["data"]["total_views"] == 500


# --- Scheduler status response patterns ---


class TestSchedulerStatusResponsePattern:
    """Tests for scheduler status response patterns."""

    def _format_scheduler_status(
        self, is_running, active_users, total_jobs, config=None
    ):
        return {
            "success": True,
            "data": {
                "scheduler_available": True,
                "is_running": is_running,
                "active_users": active_users,
                "total_scheduled_jobs": total_jobs,
                "config": config or {},
            },
        }

    def test_scheduler_always_available(self):
        response = self._format_scheduler_status(False, 0, 0)
        assert response["data"]["scheduler_available"] is True

    def test_is_running_reflected(self):
        response = self._format_scheduler_status(True, 0, 0)
        assert response["data"]["is_running"] is True

    def test_active_users_count(self):
        response = self._format_scheduler_status(True, 5, 0)
        assert response["data"]["active_users"] == 5

    def test_total_jobs_count(self):
        response = self._format_scheduler_status(True, 0, 15)
        assert response["data"]["total_scheduled_jobs"] == 15


# --- Folder response patterns ---


class TestFolderResponsePattern:
    """Tests for folder response patterns."""

    def _format_folder(self, folder, subscription_count=0):
        return {
            "id": folder["id"],
            "name": folder["name"],
            "description": folder.get("description", ""),
            "created_at": folder.get("created_at"),
            "subscription_count": subscription_count,
        }

    def test_includes_id_and_name(self):
        folder = {"id": "f1", "name": "My Folder"}
        result = self._format_folder(folder)
        assert result["id"] == "f1"
        assert result["name"] == "My Folder"

    def test_description_defaults_empty(self):
        folder = {"id": "f1", "name": "Test"}
        result = self._format_folder(folder)
        assert result["description"] == ""

    def test_includes_subscription_count(self):
        folder = {"id": "f1", "name": "Test"}
        result = self._format_folder(folder, subscription_count=10)
        assert result["subscription_count"] == 10


# --- Rating response patterns ---


class TestRatingResponsePattern:
    """Tests for rating response patterns."""

    def _format_rating_response(self, card_id, rating_type, value):
        return {
            "success": True,
            "data": {
                "card_id": card_id,
                "rating_type": rating_type,
                "value": value,
            },
            "message": "Rating recorded",
        }

    def test_includes_card_id(self):
        response = self._format_rating_response("card-123", "relevance", "up")
        assert response["data"]["card_id"] == "card-123"

    def test_includes_rating_type(self):
        response = self._format_rating_response("c1", "relevance", "up")
        assert response["data"]["rating_type"] == "relevance"

    def test_includes_value(self):
        response = self._format_rating_response("c1", "relevance", "up")
        assert response["data"]["value"] == "up"

    def test_has_confirmation_message(self):
        response = self._format_rating_response("c1", "relevance", "up")
        assert response["message"] == "Rating recorded"


# --- Batch operation response patterns ---


class TestBatchOperationResponsePattern:
    """Tests for batch operation response patterns."""

    def _format_batch_result(self, total, successful, failed, errors=None):
        return {
            "success": failed == 0,
            "data": {
                "total": total,
                "successful": successful,
                "failed": failed,
                "errors": errors or [],
            },
        }

    def test_all_successful(self):
        response = self._format_batch_result(10, 10, 0)
        assert response["success"] is True

    def test_partial_failure(self):
        response = self._format_batch_result(10, 7, 3)
        assert response["success"] is False

    def test_includes_counts(self):
        response = self._format_batch_result(10, 8, 2)
        assert response["data"]["total"] == 10
        assert response["data"]["successful"] == 8
        assert response["data"]["failed"] == 2

    def test_includes_errors(self):
        errors = [{"id": "1", "error": "Failed"}]
        response = self._format_batch_result(1, 0, 1, errors)
        assert len(response["data"]["errors"]) == 1


# --- Datetime formatting patterns ---


class TestDatetimeFormatting:
    """Tests for datetime formatting in responses."""

    def test_iso_format(self):
        dt = datetime(2025, 6, 15, 12, 30, 0, tzinfo=timezone.utc)
        formatted = dt.isoformat()
        assert "2025-06-15" in formatted

    def test_iso_format_has_timezone(self):
        dt = datetime.now(timezone.utc)
        formatted = dt.isoformat()
        assert "+" in formatted or "Z" in formatted or "-" in formatted

    def test_relative_time_ago(self):
        now = datetime.now(timezone.utc)
        past = now - timedelta(hours=2)
        delta = now - past
        hours_ago = delta.total_seconds() / 3600
        assert abs(hours_ago - 2) < 0.01


# --- Validation error response patterns ---


class TestValidationErrorResponse:
    """Tests for validation error response patterns."""

    def _validation_error(self, field, message):
        return {
            "success": False,
            "error": f"Validation error: {message}",
            "error_code": "VALIDATION_ERROR",
            "details": {"field": field, "message": message},
        }

    def test_includes_field(self):
        response = self._validation_error("name", "Required")
        assert response["details"]["field"] == "name"

    def test_includes_message(self):
        response = self._validation_error("email", "Invalid format")
        assert response["details"]["message"] == "Invalid format"

    def test_has_validation_code(self):
        response = self._validation_error("f", "m")
        assert response["error_code"] == "VALIDATION_ERROR"


# --- Feature disabled response patterns ---


class TestFeatureDisabledResponse:
    """Tests for feature disabled response patterns."""

    def _feature_disabled(self, feature):
        return {
            "success": False,
            "error": f"{feature} is disabled",
            "error_code": "FEATURE_DISABLED",
        }

    def test_error_message_includes_feature(self):
        response = self._feature_disabled("News")
        assert "News" in response["error"]

    def test_has_feature_disabled_code(self):
        response = self._feature_disabled("News")
        assert response["error_code"] == "FEATURE_DISABLED"


# --- Not found response patterns ---


class TestNotFoundResponse:
    """Tests for not found response patterns."""

    def _not_found(self, resource_type, resource_id):
        return {
            "success": False,
            "error": f"{resource_type} not found: {resource_id}",
            "error_code": "NOT_FOUND",
        }

    def test_error_includes_type(self):
        response = self._not_found("Subscription", "123")
        assert "Subscription" in response["error"]

    def test_error_includes_id(self):
        response = self._not_found("Card", "card-456")
        assert "card-456" in response["error"]

    def test_has_not_found_code(self):
        response = self._not_found("User", "1")
        assert response["error_code"] == "NOT_FOUND"


# --- Conflict response patterns ---


class TestConflictResponse:
    """Tests for conflict response patterns."""

    def _conflict(self, resource, message):
        return {
            "success": False,
            "error": message,
            "error_code": "CONFLICT",
            "details": {"resource": resource},
        }

    def test_includes_resource(self):
        response = self._conflict("folder", "Already exists")
        assert response["details"]["resource"] == "folder"

    def test_has_conflict_code(self):
        response = self._conflict("subscription", "Duplicate")
        assert response["error_code"] == "CONFLICT"
