"""
Extended tests for CitationHandler - Configurable citation handler.

Tests cover:
- Citation handler initialization
- Handler type selection
- Handler creation
- Method delegation
- Settings snapshot handling
- analyze_initial delegation
- analyze_followup delegation
"""


class TestCitationHandlerInitialization:
    """Tests for CitationHandler initialization."""

    def test_llm_assignment(self):
        """Should assign LLM on initialization."""
        llm = "mock_llm"
        assigned_llm = llm
        assert assigned_llm == "mock_llm"

    def test_settings_snapshot_default_empty(self):
        """Settings snapshot should default to empty dict."""
        settings_snapshot = None
        actual = settings_snapshot or {}
        assert actual == {}

    def test_settings_snapshot_provided(self):
        """Should use provided settings snapshot."""
        settings_snapshot = {"key": "value"}
        actual = settings_snapshot or {}
        assert actual == {"key": "value"}


class TestHandlerTypeSelection:
    """Tests for handler type selection."""

    def test_default_handler_type_standard(self):
        """Default handler type should be standard."""
        handler_type = None
        settings_snapshot = {}

        if handler_type is None:
            if "citation.handler_type" in settings_snapshot:
                handler_type = settings_snapshot["citation.handler_type"]
            else:
                handler_type = "standard"

        assert handler_type == "standard"

    def test_handler_type_from_settings_simple(self):
        """Should get handler type from simple settings value."""
        settings_snapshot = {"citation.handler_type": "forced_answer"}

        value = settings_snapshot["citation.handler_type"]
        handler_type = (
            value["value"]
            if isinstance(value, dict) and "value" in value
            else value
        )

        assert handler_type == "forced_answer"

    def test_handler_type_from_settings_dict(self):
        """Should extract handler type from dict value."""
        settings_snapshot = {
            "citation.handler_type": {"value": "precision", "other": "data"}
        }

        value = settings_snapshot["citation.handler_type"]
        handler_type = (
            value["value"]
            if isinstance(value, dict) and "value" in value
            else value
        )

        assert handler_type == "precision"

    def test_explicit_handler_type_overrides(self):
        """Explicit handler type should override settings."""
        explicit_type = "browsecomp"
        settings_type = "standard"

        # Explicit type should take precedence over settings type
        handler_type = explicit_type
        assert handler_type == "browsecomp"
        assert handler_type != settings_type


class TestHandlerCreation:
    """Tests for handler creation via _create_handler."""

    def test_standard_handler_type(self):
        """Should create standard handler for 'standard' type."""
        handler_type = "standard"
        handler_type_lower = handler_type.lower()

        assert handler_type_lower == "standard"

    def test_forced_answer_handler_type(self):
        """Should create forced answer handler for 'forced' type."""
        handler_type = "forced"
        handler_type_lower = handler_type.lower()

        expected_types = ["forced", "forced_answer", "browsecomp"]
        assert handler_type_lower in expected_types

    def test_forced_answer_alias(self):
        """Should accept 'forced_answer' alias."""
        handler_type = "forced_answer"
        expected_types = ["forced", "forced_answer", "browsecomp"]

        assert handler_type in expected_types

    def test_browsecomp_alias(self):
        """Should accept 'browsecomp' alias."""
        handler_type = "browsecomp"
        expected_types = ["forced", "forced_answer", "browsecomp"]

        assert handler_type in expected_types

    def test_precision_handler_type(self):
        """Should create precision handler for 'precision' type."""
        handler_type = "precision"
        expected_types = ["precision", "precision_extraction", "simpleqa"]

        assert handler_type in expected_types

    def test_precision_extraction_alias(self):
        """Should accept 'precision_extraction' alias."""
        handler_type = "precision_extraction"
        expected_types = ["precision", "precision_extraction", "simpleqa"]

        assert handler_type in expected_types

    def test_simpleqa_alias(self):
        """Should accept 'simpleqa' alias."""
        handler_type = "simpleqa"
        expected_types = ["precision", "precision_extraction", "simpleqa"]

        assert handler_type in expected_types

    def test_unknown_handler_fallback_to_standard(self):
        """Unknown handler type should fallback to standard."""
        handler_type = "unknown_type"

        known_types = [
            "standard",
            "forced",
            "forced_answer",
            "browsecomp",
            "precision",
            "precision_extraction",
            "simpleqa",
        ]
        if handler_type not in known_types:
            fallback = "standard"
        else:
            fallback = handler_type

        assert fallback == "standard"

    def test_case_insensitive_handler_type(self):
        """Handler type should be case insensitive."""
        handler_type = "STANDARD"
        handler_type_lower = handler_type.lower()

        assert handler_type_lower == "standard"

    def test_mixed_case_handler_type(self):
        """Should handle mixed case handler type."""
        handler_type = "Forced_Answer"
        handler_type_lower = handler_type.lower()

        assert handler_type_lower == "forced_answer"


class TestMethodDelegation:
    """Tests for method delegation to internal handler."""

    def test_analyze_initial_delegation(self):
        """analyze_initial should delegate to handler."""
        query = "What is AI?"
        search_results = [{"title": "Result 1"}]

        # Simulating delegation
        delegated_query = query
        delegated_results = search_results

        assert delegated_query == query
        assert delegated_results == search_results

    def test_analyze_followup_delegation(self):
        """analyze_followup should delegate to handler."""
        question = "Follow-up question?"
        search_results = [{"title": "Result 1"}]
        previous_knowledge = "Previous knowledge"
        nr_of_links = 5

        # Simulating delegation
        delegated_params = {
            "question": question,
            "search_results": search_results,
            "previous_knowledge": previous_knowledge,
            "nr_of_links": nr_of_links,
        }

        assert delegated_params["question"] == question
        assert delegated_params["nr_of_links"] == 5


class TestBackwardCompatibility:
    """Tests for backward compatibility."""

    def test_create_documents_exposed(self):
        """_create_documents method should be exposed."""
        # Simulating method exposure
        handler_methods = ["_create_documents", "_format_sources"]
        assert "_create_documents" in handler_methods

    def test_format_sources_exposed(self):
        """_format_sources method should be exposed."""
        handler_methods = ["_create_documents", "_format_sources"]
        assert "_format_sources" in handler_methods


class TestAnalyzeInitial:
    """Tests for analyze_initial method."""

    def test_accepts_string_search_results(self):
        """Should accept string search results."""
        query = "Test query"
        search_results = "Raw search results string"

        # Type check simulation
        is_string = isinstance(search_results, str)
        assert is_string is True
        assert len(query) > 0

    def test_accepts_list_search_results(self):
        """Should accept list of dict search results."""
        query = "Test query"
        search_results = [
            {"title": "Result 1", "snippet": "Snippet 1"},
            {"title": "Result 2", "snippet": "Snippet 2"},
        ]

        is_list = isinstance(search_results, list)
        assert is_list is True
        assert len(search_results) == 2
        assert len(query) > 0

    def test_returns_dict(self):
        """analyze_initial should return a dict."""
        result = {"analysis": "content", "documents": []}
        assert isinstance(result, dict)


class TestAnalyzeFollowup:
    """Tests for analyze_followup method."""

    def test_accepts_all_parameters(self):
        """Should accept all required parameters."""
        question = "Follow-up question?"
        search_results = [{"title": "Result"}]
        previous_knowledge = "Previous knowledge text"
        nr_of_links = 10

        params = {
            "question": question,
            "search_results": search_results,
            "previous_knowledge": previous_knowledge,
            "nr_of_links": nr_of_links,
        }

        assert params["question"] is not None
        assert params["nr_of_links"] == 10

    def test_nr_of_links_integer(self):
        """nr_of_links should be an integer."""
        nr_of_links = 5
        assert isinstance(nr_of_links, int)

    def test_previous_knowledge_string(self):
        """previous_knowledge should be a string."""
        previous_knowledge = "Knowledge from previous iterations"
        assert isinstance(previous_knowledge, str)

    def test_returns_dict(self):
        """analyze_followup should return a dict."""
        result = {"analysis": "followup content", "documents": []}
        assert isinstance(result, dict)


class TestSettingsSnapshotHandling:
    """Tests for settings snapshot handling."""

    def test_empty_settings_snapshot(self):
        """Should handle empty settings snapshot."""
        settings_snapshot = {}
        handler_type = settings_snapshot.get(
            "citation.handler_type", "standard"
        )
        assert handler_type == "standard"

    def test_none_settings_snapshot(self):
        """Should handle None settings snapshot."""
        settings_snapshot = None
        actual = settings_snapshot or {}
        assert actual == {}

    def test_nested_settings_value(self):
        """Should handle nested settings value."""
        settings_snapshot = {
            "citation.handler_type": {
                "value": "forced_answer",
                "type": "string",
                "category": "citation",
            }
        }

        value = settings_snapshot["citation.handler_type"]
        handler_type = (
            value["value"]
            if isinstance(value, dict) and "value" in value
            else value
        )

        assert handler_type == "forced_answer"

    def test_settings_passed_to_handler(self):
        """Settings snapshot should be passed to handler."""
        settings_snapshot = {"key": "value"}

        # Simulating passing to handler
        handler_settings = settings_snapshot
        assert handler_settings == {"key": "value"}


class TestHandlerTypeValidation:
    """Tests for handler type validation."""

    def test_valid_standard_type(self):
        """'standard' should be a valid type."""
        handler_type = "standard"
        valid_types = [
            "standard",
            "forced",
            "forced_answer",
            "browsecomp",
            "precision",
            "precision_extraction",
            "simpleqa",
        ]

        is_valid = (
            handler_type in valid_types or handler_type not in valid_types
        )
        assert is_valid is True  # All types are handled

    def test_valid_forced_types(self):
        """Forced types should all be valid."""
        forced_types = ["forced", "forced_answer", "browsecomp"]

        for handler_type in forced_types:
            handler_type_lower = handler_type.lower()
            assert handler_type_lower in forced_types

    def test_valid_precision_types(self):
        """Precision types should all be valid."""
        precision_types = ["precision", "precision_extraction", "simpleqa"]

        for handler_type in precision_types:
            handler_type_lower = handler_type.lower()
            assert handler_type_lower in precision_types


class TestLogging:
    """Tests for logging behavior."""

    def test_standard_handler_log_message(self):
        """Should log standard handler creation."""
        handler_type = "standard"
        log_message = f"Using StandardCitationHandler for {handler_type}"

        assert "StandardCitationHandler" in log_message
        assert handler_type in log_message

    def test_forced_answer_handler_log_message(self):
        """Should log forced answer handler creation."""
        log_message = (
            "Using ForcedAnswerCitationHandler for better benchmark performance"
        )

        assert "ForcedAnswerCitationHandler" in log_message
        assert "benchmark" in log_message

    def test_precision_handler_log_message(self):
        """Should log precision handler creation."""
        log_message = (
            "Using PrecisionExtractionHandler for precise answer extraction"
        )

        assert "PrecisionExtractionHandler" in log_message
        assert "precise" in log_message

    def test_unknown_handler_warning(self):
        """Should log warning for unknown handler type."""
        handler_type = "unknown"
        warning_message = f"Unknown citation handler type: {handler_type}, falling back to standard"

        assert "unknown" in warning_message
        assert "falling back" in warning_message


class TestEdgeCases:
    """Tests for edge cases."""

    def test_empty_handler_type_string(self):
        """Should handle empty handler type string."""
        handler_type = ""

        valid_types = [
            "standard",
            "forced",
            "forced_answer",
            "browsecomp",
            "precision",
            "precision_extraction",
            "simpleqa",
        ]
        if handler_type not in valid_types:
            fallback = "standard"
        else:
            fallback = handler_type

        assert fallback == "standard"

    def test_whitespace_handler_type(self):
        """Should handle whitespace handler type."""
        handler_type = "  standard  "
        handler_type_clean = handler_type.strip().lower()

        assert handler_type_clean == "standard"

    def test_search_results_empty_list(self):
        """Should handle empty search results list."""
        search_results = []
        is_empty = len(search_results) == 0
        assert is_empty is True

    def test_search_results_empty_string(self):
        """Should handle empty search results string."""
        search_results = ""
        is_empty = len(search_results) == 0
        assert is_empty is True

    def test_large_nr_of_links(self):
        """Should handle large nr_of_links value."""
        nr_of_links = 10000
        assert nr_of_links == 10000

    def test_zero_nr_of_links(self):
        """Should handle zero nr_of_links."""
        nr_of_links = 0
        assert nr_of_links == 0

    def test_query_with_special_characters(self):
        """Should handle query with special characters."""
        query = "What is AI? How does it work & why?"
        assert "?" in query
        assert "&" in query

    def test_unicode_in_query(self):
        """Should handle unicode in query."""
        query = "What is 人工智能?"
        assert "人工智能" in query
