#!/usr/bin/env python3
"""Downsizes ../../res/img/*.jpeg into app/src/main/res/drawable-nodpi/*.webp
for the Android app.

Structurally a sibling of ../../watch/scripts/gen_card_images.py (same
CARDS slug/filename table - matching engine/src/tarot_data.c's own
k_card_slug, so app/src/main/res/drawable-nodpi/<slug>.webp resolves via
plain resource-name lookup, see app/src/main/java/.../ui/CardArt.kt -
and the same per-file mtime skip-if-up-to-date logic), but sized and
encoded for a phone screen instead of Pebble's hardware-forced 72px PNG:
400px wide, lossy WebP (quality 85) - these are painted illustrations,
not line art, so WebP meaningfully beats PNG here, and 21MB of source
JPEGs would otherwise bloat the APK.

Generated output, not committed (see the repo's root .gitignore's
/android/app/src/main/res/drawable-nodpi entry) - regenerate by running
this script directly or via Gradle's generateCardArt task (wired into
app's preBuild, see ../app/build.gradle.kts). Requires Pillow (`pip
install Pillow`), already part of build-image's toolchain.
"""
import os
import sys

from PIL import Image

SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
SRC_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, "..", "..", "res", "img"))
OUT_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, "..", "app", "src", "main", "res", "drawable-nodpi"))

CARD_WIDTH = 400
WEBP_QUALITY = 85

# (source file in res/img/, slug matching engine/src/tarot_data.c's
# k_card_slug table) - in TarotCard enum order (CARD_FOOL = 0 ... CARD_WORLD).
CARDS = [
    ("RWS_Tarot_00_Fool.jpeg", "fool"),
    ("RWS_Tarot_01_Magician.jpeg", "magician"),
    ("RWS_Tarot_02_High_Priestess.jpeg", "high_priestess"),
    ("RWS_Tarot_03_Empress.jpeg", "empress"),
    ("RWS_Tarot_04_Emperor.jpeg", "emperor"),
    ("RWS_Tarot_05_Hierophant.jpeg", "hierophant"),
    ("RWS_Tarot_06_Lovers.jpeg", "lovers"),
    ("RWS_Tarot_07_Chariot.jpeg", "chariot"),
    ("RWS_Tarot_08_Strength.jpeg", "strength"),
    ("RWS_Tarot_09_Hermit.jpeg", "hermit"),
    ("RWS_Tarot_10_Wheel_of_Fortune.jpeg", "wheel_of_fortune"),
    ("RWS_Tarot_11_Justice.jpeg", "justice"),
    ("RWS_Tarot_12_Hanged_Man.jpeg", "hanged_man"),
    ("RWS_Tarot_13_Death.jpeg", "death"),
    ("RWS_Tarot_14_Temperance.jpeg", "temperance"),
    ("RWS_Tarot_15_Devil.jpeg", "devil"),
    ("RWS_Tarot_16_Tower.jpeg", "tower"),
    ("RWS_Tarot_17_Star.jpeg", "star"),
    ("RWS_Tarot_18_Moon.jpeg", "moon"),
    ("RWS_Tarot_19_Sun.jpeg", "sun"),
    ("RWS_Tarot_20_Judgement.jpeg", "judgement"),
    ("RWS_Tarot_21_World.jpeg", "world"),
]


def main():
    os.makedirs(OUT_DIR, exist_ok=True)
    written = 0
    for src_name, slug in CARDS:
        src_path = os.path.join(SRC_DIR, src_name)
        out_path = os.path.join(OUT_DIR, f"{slug}.webp")

        if os.path.exists(out_path) and os.path.getmtime(out_path) >= os.path.getmtime(src_path):
            continue

        with Image.open(src_path) as img:
            ratio = CARD_WIDTH / img.width
            height = round(img.height * ratio)
            resized = img.convert("RGB").resize((CARD_WIDTH, height), Image.LANCZOS)
            resized.save(out_path, "WEBP", quality=WEBP_QUALITY)
        written += 1

    print(f"wrote {written}/{len(CARDS)} card images to {OUT_DIR}", file=sys.stderr)


if __name__ == "__main__":
    main()