"""
Tests for Gradio UI components.

These tests verify:
- Score formatting
- Result gallery creation
- App creation
"""

import pytest

try:
    from src.ui.app import format_score, create_result_gallery
    HAS_GRADIO = True
except ImportError:
    HAS_GRADIO = False


@pytest.mark.skipif(not HAS_GRADIO, reason="gradio not installed")
class TestFormatScore:
    """Tests for format_score function."""
    
    def test_format_high_score(self):
        """Test formatting high similarity score."""
        result = format_score(0.9876)
        assert result == "0.9876"
    
    def test_format_low_score(self):
        """Test formatting low similarity score."""
        result = format_score(0.1234)
        assert result == "0.1234"
    
    def test_format_zero_score(self):
        """Test formatting zero score."""
        result = format_score(0.0)
        assert result == "0.0000"
    
    def test_format_one_score(self):
        """Test formatting perfect score."""
        result = format_score(1.0)
        assert result == "1.0000"


@pytest.mark.skipif(not HAS_GRADIO, reason="gradio not installed")
class TestCreateResultGallery:
    """Tests for create_result_gallery function."""
    
    def test_empty_results(self):
        """Test gallery creation with empty results."""
        from src.retrieval.multimodal import ModalityResult
        
        results = ModalityResult(
            indices=[],
            scores=[],
            modalities=[],
            query_modality="optical"
        )
        
        gallery = create_result_gallery(results)
        
        assert gallery == []


@pytest.mark.skipif(not HAS_GRADIO, reason="gradio not installed")
class TestAppCreation:
    """Tests for app creation."""
    
    def test_create_app(self):
        """Test Gradio app can be created."""
        from src.ui.app import create_app
        app = create_app()
        assert app is not None


# Self-check
if __name__ == "__main__":
    pytest.main([__file__, "-v"])