# Thumbnails sized for the tile's WIDTH at 2x density, not 512 on the longest
# side. The operator on sindra-nude-final, 2026-09-23: "the images look blurry
# until they're selected and blown up". Every row is a change
# tests/test_thumbs.py or tests/test_thumbs_browser.py claims to forbid.

unit = "thumbnails sized for the tile"

[[mutation]]
label = "the old rule: bound the longest side at 512 (portraits get 256px of width)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_portrait_keeps_its_full_width"
old = '''
            im.thumbnail((THUMB_WIDTH, THUMB_HEIGHT_MAX))'''
new = '''
            im.thumbnail((512, 512))'''

[[mutation]]
label = "the width bound is below what the desktop tile needs at 2x"
file = "booth/thumbs.py"
test = "tests/test_thumbs_browser.py::test_a_thumbnail_covers_its_tile_at_2x_density"
old = '''
THUMB_WIDTH = 768'''
new = '''
THUMB_WIDTH = 640'''

[[mutation]]
label = "no height bound: a long screenshot goes through at full height"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_extremely_tall_image_is_bounded_by_height_too"
old = '''
            im.thumbnail((THUMB_WIDTH, THUMB_HEIGHT_MAX))'''
new = '''
            im.thumbnail((THUMB_WIDTH, 10 ** 6))'''

[[mutation]]
label = "fitting in pixels is taken as light in bytes (the megabyte portrait is served whole)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_tile_width_image_that_is_heavy_still_gets_a_thumbnail"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits:'''

[[mutation]]
label = "an already small, light image gets a cache entry that saves nothing"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_already_small_image_gets_no_thumbnail"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits and getattr(im, "is_animated", False):'''

[[mutation]]
label = "a heavy animated GIF that fits is flattened to one frame"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_animated_gif_that_fits_is_served_as_itself"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits and s_stat.st_size <= THUMB_LIGHT_BYTES:'''

[[mutation]]
label = "an unversioned cache name: a thumbnail cut to the old rule is served forever"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_thumbnail_cut_to_the_old_rule_is_not_served"
old = '''
    return booth / THUMB_DIR / f"{rel}.{rule}.webp"'''
new = '''
    return booth / THUMB_DIR / (rel + ".webp")'''

# ---- the heid bug-hunt on this change (4/4 arms), folded ------------------------

[[mutation]]
label = "a cache hit trusts the name and the mtime (a planted directory is served)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_planted_directory_at_the_cache_path_is_not_served"
old = '''
    return stat.S_ISREG(o.st_mode) and o.st_mtime_ns == s_stat.st_mtime_ns'''
new = '''
    return o.st_mtime_ns >= s_stat.st_mtime_ns'''

[[mutation]]
label = "freshness is 'at least as new' (a cp -p'd older source pins the old thumbnail)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_source_replaced_with_an_older_mtime_is_rebuilt"
old = '''
    return stat.S_ISREG(o.st_mode) and o.st_mtime_ns == s_stat.st_mtime_ns'''
new = '''
    return stat.S_ISREG(o.st_mode) and o.st_mtime_ns >= s_stat.st_mtime_ns'''

[[mutation]]
label = "the cache dirs are made by following links (a planted .thumbs link escapes the booth)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_symlinked_cache_dir_is_never_written_through"
old = '''
            if not _cache_dir(booth, out.parent):
                return None'''
new = '''
            out.parent.mkdir(parents=True, exist_ok=True)'''

[[mutation]]
label = "a predictable temp name the encoder writes through"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_planted_link_at_the_old_temp_name_cannot_redirect_the_write"
old = '''
            fd, tmp = tempfile.mkstemp(prefix=".", suffix=".tmp", dir=out.parent)
            try:
                with os.fdopen(fd, "wb") as fh:
                    im.save(fh, "WEBP", quality=THUMB_QUALITY, method=4)'''
new = '''
            tmp = str(out) + f".{os.getpid()}.tmp"
            try:
                im.save(tmp, "WEBP", quality=THUMB_QUALITY, method=4)'''

[[mutation]]
label = "RGBA chosen by getbands() alone (palette transparency baked opaque)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_palette_transparency_survives_the_thumbnail"
old = '''
                alpha = "A" in im.getbands() or "transparency" in im.info'''
new = '''
                alpha = "A" in im.getbands()'''

[[mutation]]
label = "EXIF orientation ignored (a camera portrait tiled sideways)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_camera_portrait_is_sized_and_saved_upright"
old = '''
            orientation = im.getexif().get(0x0112, 1)'''
new = '''
            orientation = 1'''

[[mutation]]
label = "no pixel budget: whatever the header claims is decoded"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_image_past_the_pixel_budget_is_never_decoded"
old = '''
            if w * h > THUMB_MAX_PIXELS:
                return None'''
new = '''
            if False:
                return None'''