"""Unit tests for generators."""

import pytest
from code_doc_cli.generators.markdown_generator import MarkdownGenerator
from code_doc_cli.generators.templates import DocumentationTemplate, SyntaxHighlighter
from code_doc_cli.parsers.base import DocElement, ElementType, Parameter


class TestMarkdownGenerator:
    """Tests for Markdown generator."""

    @pytest.fixture
    def sample_elements(self):
        """Create sample documentation elements."""
        elements = []

        module_elem = DocElement(
            name="sample_module",
            element_type=ElementType.MODULE,
            description="This is a sample module for testing.",
            full_docstring="This is a sample module for testing.",
            source_file="sample.py",
            line_number=1,
        )
        elements.append(module_elem)

        func_elem = DocElement(
            name="add",
            element_type=ElementType.FUNCTION,
            description="Add two numbers together.",
            full_docstring="Add two numbers together.\n\nArgs:\n  a: First number\n  b: Second number",
            parameters=[
                Parameter(name="a", type_hint="int", description="First number"),
                Parameter(name="b", type_hint="int", description="Second number"),
            ],
            return_type="int",
            return_description="The sum of a and b",
            source_file="sample.py",
            line_number=10,
            visibility="public",
        )
        elements.append(func_elem)

        class_elem = DocElement(
            name="Calculator",
            element_type=ElementType.CLASS,
            description="A simple calculator class.",
            full_docstring="A simple calculator class.",
            attributes=[
                ("memory", "int", "Current stored value in memory"),
            ],
            source_file="sample.py",
            line_number=20,
            visibility="public",
            decorators=["@dataclass"],
        )
        elements.append(class_elem)

        return elements

    def test_generate_markdown(self, sample_elements):
        """Test Markdown generation."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=sample_elements)

        assert "# API Documentation" in output
        assert "sample_module" in output
        assert "add" in output
        assert "Calculator" in output

    def test_generate_function_markdown(self, sample_elements):
        """Test function documentation in Markdown."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=sample_elements)

        assert "### add" in output
        assert "int" in output
        assert "First number" in output

    def test_generate_class_markdown(self, sample_elements):
        """Test class documentation in Markdown."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=sample_elements)

        assert "## Calculator" in output
        assert "memory" in output

    def test_generate_json(self, sample_elements):
        """Test JSON generation."""
        generator = MarkdownGenerator()
        output = generator.generate_json(elements=sample_elements)

        assert '"name": "add"' in output
        assert '"type": "function"' in output
        assert '"parameters"' in output

    def test_generate_json_structure(self, sample_elements):
        """Test JSON output structure."""
        generator = MarkdownGenerator()
        output = generator.generate_json(elements=sample_elements)

        import json
        data = json.loads(output)

        assert "generated_at" in data
        assert "elements" in data
        assert len(data["elements"]) == 3

    def test_custom_title(self, sample_elements):
        """Test custom documentation title."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=sample_elements, title="Custom Title")

        assert "# Custom Title" in output

    def test_no_metadata(self, sample_elements):
        """Test generation without metadata."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=sample_elements, include_metadata=False)

        assert "Generated on" not in output

    def test_empty_elements(self):
        """Test generation with no elements."""
        generator = MarkdownGenerator()
        output = generator.generate(elements=[])

        assert "# API Documentation" in output


class TestDocumentationTemplate:
    """Tests for documentation template."""

    def test_format_function(self):
        """Test function template formatting."""
        template = DocumentationTemplate()
        params = [("a", "int", None, "First number"), ("b", "int", None, "Second number")]
        output = template.format_function(
            name="add",
            description="Add two numbers.",
            parameters=params,
            return_type="int",
            return_description="The sum",
            raises=[("ValueError", "If inputs are invalid")],
            examples=["add(1, 2)  # Returns 3"],
            source_file="test.py",
            line_number=10,
            decorators=[],
        )

        assert "### add" in output
        assert "Add two numbers" in output
        assert "| a |" in output
        assert "| b |" in output
        assert "Returns:" in output
        assert "Raises:" in output

    def test_format_class(self):
        """Test class template formatting."""
        template = DocumentationTemplate()
        output = template.format_class(
            name="Calculator",
            description="A calculator class.",
            attributes=[("value", "int", "Stored value")],
            methods=["add", "subtract"],
            parameters=[("BaseClass", "Some description")],
            decorators=["@dataclass"],
            source_file="test.py",
            line_number=5,
        )

        assert "## Calculator" in output
        assert "A calculator class" in output
        assert "Attributes:" in output
        assert "value" in output
        assert "Methods:" in output

    def test_format_module(self):
        """Test module template formatting."""
        template = DocumentationTemplate()
        output = template.format_module(
            name="my_module",
            description="This is my module.",
            imports=["os", "sys"],
            elements_count={"functions": 5, "classes": 2, "constants": 3},
        )

        assert "# my_module" in output
        assert "This is my module" in output
        assert "os" in output
        assert "functions" in output


class TestSyntaxHighlighter:
    """Tests for syntax highlighter."""

    def test_highlight_python(self):
        """Test Python syntax highlighting."""
        highlighter = SyntaxHighlighter()
        code = "def hello():\n    print('world')"
        output = highlighter.highlight(code, "python")

        assert output
        assert "<pre>" in output or "code" in output.lower()

    def test_highlight_with_theme(self):
        """Test different themes."""
        for theme in ["default", "dark", "light"]:
            highlighter = SyntaxHighlighter(theme=theme)
            assert highlighter.theme is not None

    def test_get_css(self):
        """Test CSS generation."""
        highlighter = SyntaxHighlighter()
        css = highlighter.get_css()

        assert css
        assert "pre" in css or "code" in css