"""
Tests for Answer Extraction functionality.

Phase 34: Answer Decoding - Tests for answer extraction from various formats.
Tests extraction from HTML, JSON, and text content.
"""


class TestAnswerExtraction:
    """Tests for answer extraction from various content types."""

    def test_extract_from_plain_text(self):
        """Test extraction from plain text content."""
        # Basic text extraction logic
        text = "The answer is: 42"
        assert "42" in text

    def test_extract_from_text_with_question_format(self):
        """Test extraction from Q&A format text."""
        text = """
        Q: What is the capital of France?
        A: Paris
        """
        assert "Paris" in text

    def test_extract_from_structured_text(self):
        """Test extraction from structured text."""
        text = """
        Name: John Smith
        Age: 30
        City: New York
        """
        assert "John Smith" in text
        assert "30" in text
        assert "New York" in text

    def test_extract_from_numbered_list(self):
        """Test extraction from numbered list."""
        text = """
        1. First answer
        2. Second answer
        3. Third answer
        """
        lines = [line.strip() for line in text.split("\n") if line.strip()]
        assert len(lines) >= 3

    def test_extract_from_bullet_list(self):
        """Test extraction from bullet list."""
        text = """
        - Item one
        - Item two
        - Item three
        """
        lines = [
            line.strip()
            for line in text.split("\n")
            if line.strip().startswith("-")
        ]
        assert len(lines) == 3


class TestHTMLExtraction:
    """Tests for extraction from HTML content."""

    def test_extract_from_paragraph_tags(self):
        """Test extraction from HTML paragraph tags."""
        html = "<p>The answer is important.</p>"
        # Simple extraction by removing tags
        import re

        text = re.sub(r"<[^>]+>", "", html)
        assert "The answer is important" in text

    def test_extract_from_div_content(self):
        """Test extraction from HTML div content."""
        html = "<div class='answer'>42</div>"
        import re

        text = re.sub(r"<[^>]+>", "", html)
        assert "42" in text

    def test_extract_from_span_content(self):
        """Test extraction from HTML span content."""
        html = "<span>Answer here</span>"
        import re

        text = re.sub(r"<[^>]+>", "", html)
        assert "Answer here" in text

    def test_handle_nested_html(self):
        """Test extraction from nested HTML."""
        html = "<div><p><span>Nested answer</span></p></div>"
        import re

        text = re.sub(r"<[^>]+>", "", html)
        assert "Nested answer" in text

    def test_handle_html_entities(self):
        """Test handling of HTML entities."""
        html = "Answer with &amp; and &lt;special&gt; chars"
        # Entities should be handled
        assert "&amp;" in html or "special" in html

    def test_handle_malformed_html(self):
        """Test handling of malformed HTML."""
        html = "<p>Unclosed paragraph"
        import re

        text = re.sub(r"<[^>]+>", "", html)
        assert "Unclosed paragraph" in text


class TestJSONExtraction:
    """Tests for extraction from JSON content."""

    def test_extract_from_simple_json(self):
        """Test extraction from simple JSON."""
        data = {"answer": "42"}
        assert data["answer"] == "42"

    def test_extract_from_nested_json(self):
        """Test extraction from nested JSON."""
        data = {"response": {"data": {"answer": "Nested value"}}}
        assert data["response"]["data"]["answer"] == "Nested value"

    def test_extract_from_json_array(self):
        """Test extraction from JSON array."""
        data = {"answers": ["First", "Second", "Third"]}
        assert len(data["answers"]) == 3
        assert data["answers"][0] == "First"

    def test_extract_from_mixed_json(self):
        """Test extraction from mixed content JSON."""
        data = {
            "text_answer": "Text response",
            "numeric_answer": 42,
            "boolean_answer": True,
            "list_answer": [1, 2, 3],
        }
        assert data["text_answer"] == "Text response"
        assert data["numeric_answer"] == 42

    def test_handle_json_with_special_chars(self):
        """Test handling JSON with special characters."""
        data = {"answer": "Answer with \"quotes\" and 'apostrophes'"}
        # Should parse correctly
        assert "quotes" in data["answer"]


class TestExtractionWithSchema:
    """Tests for schema-based extraction."""

    def test_extract_with_key_schema(self):
        """Test extraction using key-based schema."""
        schema = ["answer", "result", "response"]
        data = {"answer": "Found answer", "other": "Ignored"}

        # Extract by schema keys
        for key in schema:
            if key in data:
                assert data[key] == "Found answer"
                break

    def test_extract_with_pattern_schema(self):
        """Test extraction using pattern-based schema."""
        import re

        patterns = [
            r"answer[:\s]+(.+)",
            r"result[:\s]+(.+)",
        ]
        text = "The answer: 42"

        for pattern in patterns:
            match = re.search(pattern, text, re.IGNORECASE)
            if match:
                assert "42" in match.group(1)
                break

    def test_extract_multiple_answers(self):
        """Test extraction of multiple answers."""
        text = """
        Answer 1: First
        Answer 2: Second
        Answer 3: Third
        """
        import re

        matches = re.findall(r"Answer \d+: (\w+)", text)
        assert len(matches) == 3


class TestExtractionConfidenceScoring:
    """Tests for extraction confidence scoring."""

    def test_high_confidence_exact_match(self):
        """Test high confidence for exact matches."""
        _query = "What is 2+2?"  # noqa: F841 - used for context
        answer = "4"
        # Exact match should have high confidence
        assert len(answer) > 0

    def test_lower_confidence_partial_match(self):
        """Test lower confidence for partial matches."""
        _query = "What is the capital?"  # noqa: F841 - used for context
        answer = "might be Paris"
        # Contains uncertainty words
        uncertainty_words = ["might", "maybe", "possibly", "perhaps"]
        has_uncertainty = any(
            word in answer.lower() for word in uncertainty_words
        )
        assert has_uncertainty

    def test_confidence_based_on_source(self):
        """Test confidence based on source type."""
        sources = {"wikipedia": 0.9, "forum": 0.5, "unknown": 0.3}
        assert sources["wikipedia"] > sources["forum"]


class TestExtractionErrorHandling:
    """Tests for extraction error handling."""

    def test_handle_empty_content(self):
        """Test handling of empty content."""
        content = ""
        result = content.strip() if content else None
        assert result is None or result == ""

    def test_handle_none_content(self):
        """Test handling of None content."""
        content = None
        result = content.strip() if content else None
        assert result is None

    def test_handle_binary_content(self):
        """Test handling of binary content."""
        content = b"\x00\x01\x02"
        try:
            text = content.decode("utf-8", errors="ignore")
        except Exception:
            text = ""
        assert isinstance(text, str)

    def test_handle_encoding_errors(self):
        """Test handling of encoding errors."""
        content = "Valid text"
        # Should handle gracefully
        assert content == "Valid text"


class TestExtractionCaching:
    """Tests for extraction caching behavior."""

    def test_cache_repeated_extractions(self):
        """Test caching of repeated extractions."""
        cache = {}
        content = "Test content"
        cache_key = hash(content)

        # First extraction
        cache[cache_key] = "Extracted result"

        # Second extraction should use cache
        assert cache_key in cache
        assert cache[cache_key] == "Extracted result"


class TestExtractionBatchProcessing:
    """Tests for batch extraction processing."""

    def test_batch_extraction_multiple_contents(self):
        """Test batch extraction from multiple contents."""
        contents = ["Answer 1: First", "Answer 2: Second", "Answer 3: Third"]
        results = []
        for content in contents:
            import re

            match = re.search(r"Answer \d+: (\w+)", content)
            if match:
                results.append(match.group(1))

        assert len(results) == 3

    def test_batch_extraction_mixed_formats(self):
        """Test batch extraction from mixed format contents."""
        contents = [
            {"answer": "JSON answer"},
            "<p>HTML answer</p>",
            "Plain text answer",
        ]
        results = []
        for content in contents:
            if isinstance(content, dict):
                results.append(content.get("answer", ""))
            elif "<" in str(content):
                import re

                results.append(re.sub(r"<[^>]+>", "", content))
            else:
                results.append(content)

        assert len(results) == 3


class TestExtractionMetrics:
    """Tests for extraction metrics tracking."""

    def test_track_extraction_success_rate(self):
        """Test tracking of extraction success rate."""
        successful = 8
        total = 10
        success_rate = successful / total
        assert success_rate == 0.8

    def test_track_extraction_time(self):
        """Test tracking of extraction time."""
        import time

        start = time.time()
        # Simulate extraction
        time.sleep(0.01)
        elapsed = time.time() - start
        assert elapsed >= 0.01
