from engine.render.ui_draw import glyph_texture_path, panel_texture_path
from engine.ui_assets import UI_PANEL_COLORS, generate_ui_textures


def test_generate_ui_textures_writes_a_glyph_and_panel_file(tmp_path):
    generate_ui_textures(tmp_path)
    assert (tmp_path / glyph_texture_path("A")).exists()
    assert (tmp_path / panel_texture_path("background")).exists()


def test_generate_ui_textures_writes_every_declared_panel_color(tmp_path):
    generate_ui_textures(tmp_path)
    for name in UI_PANEL_COLORS:
        assert (tmp_path / panel_texture_path(name)).exists()


def test_generate_ui_textures_does_not_overwrite_existing_files(tmp_path):
    generate_ui_textures(tmp_path)
    path = tmp_path / glyph_texture_path("A")
    original_bytes = path.read_bytes()
    path.write_bytes(b"not-a-real-png")
    generate_ui_textures(tmp_path)
    assert path.read_bytes() == b"not-a-real-png"
    assert path.read_bytes() != original_bytes