"""Tests for ShellGenius explainer module."""

from shellgenius.explainer import ShellExplainer, explain_script


class TestShellExplainer:
    """Test shell script explainer."""

    def test_explainer_initialization(self):
        """Test explainer creates properly."""
        explainer = ShellExplainer()
        assert explainer.parser is not None

    def test_basic_explain(self):
        """Test basic script explanation."""
        script = "#!/bin/bash
echo \"Hello, World!\"
ls -la
"
        result = explain_script(script, detailed=False)

        assert result.shell_type == "bash"
        assert len(result.line_explanations) > 0
        assert result.overall_purpose != ""

    def test_detect_keywords(self):
        """Test keyword detection."""
        explainer = ShellExplainer()

        if_explanation = explainer._explain_line_basic("if [ -f file ]; then")
        assert "conditional" in if_explanation.lower()

        for_explanation = explainer._explain_line_basic("for i in 1 2 3; do")
        assert "loop" in for_explanation.lower()

    def test_common_patterns(self):
        """Test common pattern detection."""
        explainer = ShellExplainer()

        shebang_explanation = explainer._explain_line_basic("#!/bin/bash")
        assert "shebang" in shebang_explanation.lower()

        pipe_explanation = explainer._explain_line_basic("cat file | grep pattern")
        assert "pipe" in pipe_explanation.lower()

    def test_generate_summary(self):
        """Test summary generation."""
        explainer = ShellExplainer()

        from shellgenius.explainer import LineExplanation

        explanations = [
            LineExplanation(1, "cmd1", "command", True),
            LineExplanation(2, "cmd2", "command", True),
            LineExplanation(3, "function test()", "function", True),
        ]

        summary = explainer._generate_summary(explanations, "bash")
        assert "bash" in summary
        assert "function" in summary.lower()

    def test_detect_purpose(self):
        """Test purpose detection."""
        explainer = ShellExplainer()

        from shellgenius.explainer import LineExplanation

        git_explanations = [
            LineExplanation(1, "git status", "command", True),
            LineExplanation(2, "git commit -m", "command", True),
        ]

        purpose = explainer._detect_purpose(git_explanations)
        assert "Git" in purpose

    def test_explain_script_function(self):
        """Test convenience function."""
        result = explain_script("echo test", detailed=False)
        assert result is not None
        assert hasattr(result, "shell_type")
        assert hasattr(result, "line_explanations")