#!/usr/bin/env bash
# Compila o Journey to the Steam Planet (WASM-4, de QuaternionWake, AGPL-3.0) a partir do fonte, no commit
# 2c88b26 (o HEAD; a tag jam-version, cdf15aa, so difere no README). O autor nao publicou release, e o
# cartucho do wasm4.org nao serve (o arquivo de cartuchos de la e CC BY-NC-SA). O build e o do proprio
# build.zig do jogo ("zig build", ReleaseSmall), sem nenhuma mudanca, com o Zig 0.16.0 (a versao estavel
# da epoca do commit, julho de 2026; o 0.15 nao aceita o "packed union(u16)" do wasm4.zig). Dois builds
# seguidos, em pastas diferentes, dao o mesmo sha256. Por ser AGPL, o site hospeda junto o tarball do
# commit e este script.
#
#   src/FredGames.Bundler/Builds/build-journey-to-the-steam-planet.sh
#
# O Zig fica em artifacts/tools/zig-<versao>/ (baixado de ziglang.org se faltar).
#
# Saida: artifacts/build/journey-to-the-steam-planet/journey-to-the-steam-planet.wasm

set -euo pipefail

COMMIT=2c88b26230f102d01c9d45dea917a8290bcdf034
SHA256=d987718dd27fc5fb9435070eac86dcda94479d661f639f10a3814e91ffa7df6e
CART_SHA256=a94af37a3d685989c6793a3fb67b5d680c8fe21bb8b024a2baa02d15e24fc655
ZIG=0.16.0
ZIG_SHA256=b23d70deaa879b5c2d486ed3316f7eaa53e84acf6fc9cc747de152450d401489

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
out="$root/artifacts/build/journey-to-the-steam-planet"
cache="$root/artifacts/build/cache"
tools="$root/artifacts/tools"

mkdir -p "$cache"
fetch() { [ -f "$cache/$2" ] || curl -fsSL --retry 4 "$1" -o "$cache/$2"; echo "$3  $cache/$2" | shasum -a 256 -c -; }
fetch "https://github.com/QuaternionWake/journey-to-the-steam-planet/archive/$COMMIT.tar.gz" \
  "journey-to-the-steam-planet-${COMMIT:0:7}.tar.gz" "$SHA256"
if [ ! -x "$tools/zig-$ZIG/zig" ]; then
  fetch "https://ziglang.org/download/$ZIG/zig-aarch64-macos-$ZIG.tar.xz" "zig-aarch64-macos-$ZIG.tar.xz" "$ZIG_SHA256"
  tar -xJf "$cache/zig-aarch64-macos-$ZIG.tar.xz" -C "$tools"
  mv "$tools/zig-aarch64-macos-$ZIG" "$tools/zig-$ZIG"
fi

rm -rf "$out"
mkdir -p "$out/tree"
tar -xzf "$cache/journey-to-the-steam-planet-${COMMIT:0:7}.tar.gz" -C "$out/tree" --strip-components 1
(cd "$out/tree" && "$tools/zig-$ZIG/zig" build --global-cache-dir "$out/zig-global-cache")

cp "$out/tree/zig-out/bin/cart.wasm" "$out/journey-to-the-steam-planet.wasm"
rm -rf "$out/tree" "$out/zig-global-cache"
echo "$CART_SHA256  $out/journey-to-the-steam-planet.wasm" | shasum -a 256 -c -