#!/usr/bin/env bash
# Monta o Mini Grand Prix (corrida cartoon de monolugares de xhhdaxx / hexinhao, MIT; JavaScript em modulos ES + canvas 2D, sem etapa de
# build) a partir do commit 4134e95 de github.com/xhhdaxx/Mini-Grand-Prix. Serve so index.html, src/ e world.geojson (dados do Natural
# Earth, dominio publico); ficam de fora o server.js e a pagina do controle por celular, o gerador de QR (scripts/qr-svg.js, MIT com a
# clausula "Good, not Evil"), os testes, a documentacao e as imagens de divulgacao.
#
# Mudancas (mini-grand-prix/patch.py, publicado junto do fonte): circuitos com nomes ficticios (o jogo usava nomes reais), sem o
# controle por celular (WebSocket e fetch('/ips')), interface sempre em ingles e uma CSP sem requisicao externa.
#
#   src/FredGames.Bundler/Builds/build-mini-grand-prix.sh
#
# Saida: artifacts/build/mini-grand-prix-4134e95/mini-grand-prix-4134e95-dist.tar.gz (dist/index.html, src/, world.geojson); o tar.gz tem
# que sair igual em dois builds.

set -euo pipefail

COMMIT=4134e95b0bf6c1bffa410eaa0f73f0e178184117
SHA256=6c163189b19c97e0180130371ef2dc20d706f02e2851f3929251af49b4270e90

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

mkdir -p "$cache"
if [ ! -f "$tgz" ]; then
  curl -fsSL --retry 4 "https://github.com/xhhdaxx/Mini-Grand-Prix/archive/$COMMIT.tar.gz" -o "$tgz.partial" && mv "$tgz.partial" "$tgz"
fi
echo "$SHA256  $tgz" | shasum -a 256 -c -

rm -rf "$out"
mkdir -p "$out/tree" "$out/dist"
tar -xzf "$tgz" -C "$out/tree" --strip-components 1
python3 -I "$here/mini-grand-prix/patch.py" "$out/tree"
cp -R "$out/tree/index.html" "$out/tree/src" "$out/tree/world.geojson" "$out/dist/"
rm -rf "$out/tree"
# nada de endereco externo no que o jogo executa
if grep -rnE 'https?://|new WebSocket|fetch\(.(/ips|/ws)' "$out/dist/src" | grep -v 'w3.org' ; then
  echo "Sobrou referencia externa." >&2; exit 1
fi

# dist/ vira um tar.gz deterministico (datas fixas, ordem fixa, sem dono).
cd "$out"
find dist -exec touch -t 202611060000 {} +
find dist -type f | LC_ALL=C sort > files.txt
COPYFILE_DISABLE=1 tar --format=ustar --uid 0 --gid 0 --uname root --gname root -n -cf - -T files.txt \
  | gzip -n -9 > "mini-grand-prix-${COMMIT:0:7}-dist.tar.gz"
rm files.txt
ls -l "mini-grand-prix-${COMMIT:0:7}-dist.tar.gz"
shasum -a 256 "mini-grand-prix-${COMMIT:0:7}-dist.tar.gz"