import pytest
import io
import os
from core.renderer import ExcelRenderer
from PIL import Image

TEST_FILE_PATH = "tests/kshj_gt1767081783800.xlsx"

@pytest.mark.skipif(not os.path.exists(TEST_FILE_PATH), reason="Test file not found")
def test_high_dpi_rendering():
    """
    Test rendering with higher scale factor.
    """
    with open(TEST_FILE_PATH, "rb") as f:
        content = f.read()
    
    renderer = ExcelRenderer(content)
    
    # Render with scale=3 (High Quality)
    img_bytes = renderer.render_to_bytes(scale=3, dpi=300)
    
    assert isinstance(img_bytes, bytes)
    assert len(img_bytes) > 0
    
    img = Image.open(io.BytesIO(img_bytes))
    
    # Save for visual inspection
    output_path = "tests/test_output_high_dpi.png"
    img.save(output_path)
    print(f"Generated high DPI test image at: {os.path.abspath(output_path)}")
    print(f"Image Size: {img.size}")