#!/usr/bin/env bash
#
# Normalises `adb exec-out screencap` captures into the files that get uploaded to Play.
#
#   ./tools/make-store-screenshots.sh                          # phone   -> 1080x2160
#   FORM_FACTOR=tablet-7in  ./tools/make-store-screenshots.sh  # 7-inch  -> 1200x1920
#   FORM_FACTOR=tablet-10in ./tools/make-store-screenshots.sh  # 10-inch -> 2560x1600
#
#   store-assets/raw-screenshots/<form>/   the raw captures (git-ignored)
#   store-assets/screenshots/<form>/       what gets uploaded (committed)
#
# Play's rule that actually bites: JPEG or 24-bit PNG **without alpha**, shorter side >= 320,
# longer side <= 3840, and **longer side <= 2x the shorter side**. A phone at its native
# 1080x2400 is 2.22:1 and is therefore REJECTED, which is why the phone path crops system
# chrome (status + navigation bars) before clamping to 2:1. A tablet frame is already inside
# the 2:1 cap on every profile the SDK ships, so its crop defaults to 0 and is opt-in.
#
# Play accepts portrait or landscape for the tablet slots; the targets below match the AVDs
# this repo is tested against (the 10-inch one is a landscape profile), and the extent step
# normalises to them either way.
set -euo pipefail

here="$(cd "$(dirname "$0")" && pwd)"
repo="$(dirname "$here")"
form="${FORM_FACTOR:-phone}"

case "$form" in
    phone)       target_w=1080; target_h=2160; default_status=93;  default_nav=130 ;;
    tablet-7in)  target_w=1200; target_h=1920; default_status=0;   default_nav=0   ;;
    tablet-10in) target_w=2560; target_h=1600; default_status=0;   default_nav=0   ;;
    *) echo "Unknown FORM_FACTOR '$form' (phone|tablet-7in|tablet-10in)" >&2; exit 1 ;;
esac

status_px="${STATUS_BAR_PX:-$default_status}"
nav_px="${NAV_BAR_PX:-$default_nav}"

raw="$repo/store-assets/raw-screenshots/$form"
out="$repo/store-assets/screenshots/$form"
mkdir -p "$out"

shopt -s nullglob
captures=("$raw"/*.png)
if [ ${#captures[@]} -eq 0 ]; then
    echo "No captures in $raw — take some with:" >&2
    echo "  adb exec-out screencap -p > $raw/01-roots.png" >&2
    exit 1
fi

echo "Normalising ${#captures[@]} capture(s) from $raw -> $out"
for capture in "${captures[@]}"; do
    name="$(basename "$capture")"
    magick "$capture" \
        -gravity North -chop 0x"$status_px" \
        -gravity South -chop 0x"$nav_px" \
        +repage \
        -resize "${target_w}x${target_h}^" \
        -gravity Center -extent "${target_w}x${target_h}" \
        -alpha remove -alpha off PNG24:"$out/$name"
    printf '  %s  ' "$out/$name"
    magick identify -format '%wx%h  %[channels]  %b\n' "$out/$name"
done

echo "Done."