"""Build a side-by-side plate from a reference photograph and a rendered capture.

    python3 Tools/review/hero_compare.py \
        --reference Art/reference/hero-masonic/02-masonictemple01.jpg \
        --render Screenshots/review/review-hero-facade-front.png \
        --out Screenshots/review/hero-compare-front.png

Both halves are scaled to the same height and labelled, so the two can be read at a glance instead of
flipping between files. Reference photography is git-ignored and never committed; only the plate is.

Result: the plate path on stdout.
"""

import argparse
import os

from PIL import Image, ImageDraw

LABEL_H = 56
TARGET_H = 900


def load_scaled(path, height):
    image = Image.open(path).convert("RGB")
    width = int(image.width * height / image.height)
    return image.resize((width, height), Image.LANCZOS)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--reference", required=True)
    parser.add_argument("--render", required=True)
    parser.add_argument("--out", required=True)
    parser.add_argument("--left-label", default="reference")
    parser.add_argument("--right-label", default="rendered")
    args = parser.parse_args()

    left = load_scaled(args.reference, TARGET_H)
    right = load_scaled(args.render, TARGET_H)

    gap = 16
    width = left.width + right.width + gap * 3
    plate = Image.new("RGB", (width, TARGET_H + LABEL_H + gap * 2), (24, 24, 26))
    plate.paste(left, (gap, LABEL_H + gap))
    plate.paste(right, (gap * 2 + left.width, LABEL_H + gap))

    draw = ImageDraw.Draw(plate)
    draw.text((gap, 18), args.left_label, fill=(235, 235, 235))
    draw.text((gap * 2 + left.width, 18), args.right_label, fill=(235, 235, 235))

    os.makedirs(os.path.dirname(os.path.abspath(args.out)), exist_ok=True)
    plate.save(args.out)
    print(args.out)


main()