#!/usr/bin/env bash
# Monta o Snakelike (roguelike de cobra de Lee Reilly, MIT; Phaser 3.90.0, MIT) a partir do commit ca8ddac de
# github.com/leereilly/snakelike. Nao ha etapa de build no projeto: o index.html carregava o Phaser do cdnjs, e
# aqui o phaser.min.js vem do pacote phaser@3.90.0 do npm (byte a byte igual ao do cdnjs).
#
# Mudancas no jogo (snakelike/snakelike-fredygames.patch): o placar online (snakelike-leaderboard.vercel.app)
# vira um placar local, guardado no localStorage do navegador; o Phaser e local; uma CSP bloqueia qualquer
# conexao fora da propria origem.
#
#   src/FredGames.Bundler/Builds/build-snakelike.sh
#
# Saida: artifacts/build/snakelike-ca8ddac/{snakelike-ca8ddac-dist.tar.gz,licenses.txt}; o tar.gz (pasta dist/) sai
# igual em dois builds seguidos.

set -euo pipefail

COMMIT=ca8ddacf31632f186e17bb44196cc3bfc7db7731
SHA256=4b765752a0fd0b8b7f7cf2bc9940a19560d3758ff6403b9209bc847135ea9767
PHASER=3.90.0
PHASER_SHA256=c4e3a8da498ab94aa8859c7a32cb89140d94bfd95d769bee36a98cdef1bea6e6

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(git -C "$here" rev-parse --show-toplevel 2>/dev/null || pwd)"
out="$root/artifacts/build/snakelike-${COMMIT:0:7}"
cache="$root/artifacts/build/cache"

mkdir -p "$cache"
fetch() {
  if [ ! -f "$cache/$2" ]; then
    curl -fsSL --retry 4 "$1" -o "$cache/$2.partial" && mv "$cache/$2.partial" "$cache/$2"
  fi
  echo "$3  $cache/$2" | shasum -a 256 -c -
}
fetch "https://github.com/leereilly/snakelike/archive/$COMMIT.tar.gz" "snakelike-${COMMIT:0:7}.tar.gz" "$SHA256"
fetch "https://registry.npmjs.org/phaser/-/phaser-$PHASER.tgz" "phaser-$PHASER.tgz" "$PHASER_SHA256"

rm -rf "$out"
mkdir -p "$out/tree" "$out/dist" "$out/phaser"
tar -xzf "$cache/snakelike-${COMMIT:0:7}.tar.gz" -C "$out/tree" --strip-components 1
tar -xzf "$cache/phaser-$PHASER.tgz" -C "$out/phaser" --strip-components 1 package/dist/phaser.min.js package/LICENSE.md
patch -s -p1 -d "$out/tree" < "$here/snakelike/snakelike-fredygames.patch"

cp "$out/tree/index.html" "$out/tree/game.js" "$out/dist/"
cp "$out/phaser/dist/phaser.min.js" "$out/dist/"
{ echo "== phaser $PHASER: LICENSE.md"; cat "$out/phaser/LICENSE.md"; } > "$out/licenses.txt"

# dist/ vira um tar.gz deterministico (datas fixas, ordem fixa, sem dono).
find "$out/dist" -exec touch -t 202604200000 {} +
( cd "$out" && find dist -type f | LC_ALL=C sort > files.txt \
  && COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n -cf - -T files.txt \
  | gzip -n -9 > "snakelike-${COMMIT:0:7}-dist.tar.gz" && rm files.txt )
rm -rf "$out/tree" "$out/phaser"
ls -l "$out/snakelike-${COMMIT:0:7}-dist.tar.gz"
shasum -a 256 "$out/snakelike-${COMMIT:0:7}-dist.tar.gz" "$out/licenses.txt"