#!/usr/bin/env bash
# Compila o Hack 1.0.3 do fredygames.com (Jay Fenlason, 1982, com Kenny Woodland, Mike Thome e Jon Payne;
# Andries Brouwer, 1984-85) na versao da colecao bsd-games 2.17, em WebAssembly com o Emscripten 6.0.10, sobre
# a camada de terminal de curses-web/ (termcap de um terminal ANSI desenhado num canvas; ver
# curses-web/README.md). Licenca BSD de 3 clausulas (hack/COPYRIGHT e hack/COPYRIGHT-JF; COPYING da colecao).
#
#   source <emsdk>/emsdk_env.sh      # emsdk install 6.0.10 && emsdk activate 6.0.10
#   src/FredGames.Bundler/Builds/build-hack.sh
#
# Fonte: bsdgames_2.17.orig.tar.gz do Debian (bsdgames/common.sh). hack/hack-fredygames.patch (so ativo no
# navegador): sem tty, sem fork (nada de "!" nem ^Z), sem lock files nem link(), o jogo salvo, o "bones" e a
# tabela de recordes em /hack-saves (a pagina guarda a pasta no IndexedDB), jogador "adventurer", teclas pela
# pagina (hack.web.c) e o delay_output pela espera assincrona. hack.onames.h vem do makedefs do proprio jogo,
# compilado no computador de quem constroi (a saida nao depende do compilador). pathnames.h: HACKDIR=/hack.
#
# Saida: artifacts/build/hack-1.0.3/hack.{js,wasm,data}, que o bundle.yaml do jogo confere pelo SHA-256.
set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
. "$here/bsdgames/common.sh"
bsdgames_init "$here"
. "$here/curses-web/flags.sh"
out="$root/artifacts/build/hack-1.0.3"

rm -rf "$out"
mkdir -p "$out/work/obj" "$out/work/src" "$out/root"
S="$out/work/src"
tar xzf "$tarball" -C "$S" --strip-components=1 bsd-games-$BSDGAMES_VERSION/hack bsd-games-$BSDGAMES_VERSION/COPYING
patch -d "$S" -p1 --no-backup-if-mismatch < "$here/hack/hack-fredygames.patch" >&2
H="$S/hack"
sed 's|@hack_dir@|/hack|' "$H/pathnames.h.in" > "$H/pathnames.h"
cc -w -o "$out/work/makedefs" "$H/makedefs.c"
"$out/work/makedefs" "$H/def.objects.h" > "$H/hack.onames.h"

objs=()
for f in "$H"/*.c; do
  [ "$(basename "$f")" = makedefs.c ] && continue
  o="$out/work/obj/$(basename "$f").o"
  objs+=("$o")
  emcc "${CW_CFLAGS[@]}" -ffile-prefix-map="$out/work/=" -I"$H" -I"$here/bsdgames" -c "$f" -o "$o"
done
# a camada de terminal: o Hack tem funcoes proprias chamadas timeout e unctrl
emcc "${CW_CFLAGS[@]}" -ffile-prefix-map="$CW_DIR/=curses-web/" -Dtimeout=cw_timeout -Dunctrl=cw_unctrl -c "$CW_DIR/curses.c" -o "$out/work/obj/curses.c.o"
emcc "${CW_CFLAGS[@]}" -ffile-prefix-map="$CW_DIR/=curses-web/" -c "$CW_DIR/termcap.c" -o "$out/work/obj/termcap.c.o"
emcc "${CW_CFLAGS[@]}" -ffile-prefix-map="$here/=" -c "$here/hack/hack.web.c" -o "$out/work/obj/hack.web.c.o"
objs+=("$out/work/obj/curses.c.o" "$out/work/obj/termcap.c.o" "$out/work/obj/hack.web.c.o")

for f in data help hh rumors; do cp "$H/$f" "$out/root/$f"; done
# Liga de dentro da pasta dos dados, com caminhos relativos (o carregador do .data guarda o nome daqui).
(
  cd "$out/root"
  emcc "${objs[@]}" "${CW_LDFLAGS[@]}" -sEMULATE_FUNCTION_POINTER_CASTS=1 \
    --preload-file data@/hack/data --preload-file help@/hack/help --preload-file hh@/hack/hh --preload-file rumors@/hack/rumors \
    -o ../hack.js 2>&1 | grep -v "^wasm-ld: warning\|^>>>" || true
)
rm -rf "$out/work" "$out/root"
shasum -a 256 "$out/hack.js" "$out/hack.wasm" "$out/hack.data"