from collections import defaultdict

from engine.render.ui_draw import draw_panel, draw_text, glyph_texture_path, panel_texture_path, text_width


def test_glyph_texture_path_uses_char_code():
    assert glyph_texture_path("A") == f"ui/font/{ord('A')}.png"


def test_glyph_texture_path_falls_back_for_non_printable_chars():
    assert glyph_texture_path("\n") == glyph_texture_path("?")


def test_draw_text_skips_spaces_but_still_advances():
    buckets: dict[str, list[float]] = defaultdict(list)
    width = draw_text(buckets, "a b", x=0, y=0, char_advance=10)
    a_path, b_path = glyph_texture_path("a"), glyph_texture_path("b")
    assert buckets[a_path] == [0, 0, 16.0, 16.0]
    assert buckets[b_path] == [20, 0, 16.0, 16.0]  # index 2 * advance 10
    assert " " not in "".join(buckets.keys())
    assert width == text_width("a b", 10)


def test_draw_panel_emits_one_instance():
    buckets: dict[str, list[float]] = defaultdict(list)
    draw_panel(buckets, "background", 5, 6, 100, 40)
    assert buckets[panel_texture_path("background")] == [5, 6, 100, 40]