#!/usr/bin/env bash
#
# Package a Windows GoldenEye 007 PC port build for distribution.
#
# Run from anywhere, inside the MSYS2 MINGW64 shell, AFTER ./build-pc.sh:
#
#     tools_pc/bundle-win.sh [VERSION]
#
# Produces, under dist/ :
#     goldeneye-pc-port-<VERSION>-win64/        the unpacked bundle
#     goldeneye-pc-port-<VERSION>-win64.zip     + .zip.sha256
#
# The bundle contains ONLY: the engine executable, its MinGW / SDL2 / zlib
# runtime DLLs, a README, and license texts. It contains NO ROM and NO game
# assets (textures, audio, models, levels, text) — the user supplies those at
# runtime from a ROM they own. The script hard-fails if a ROM image or an
# oversized blob ends up inside the bundle.
#
set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$REPO_ROOT"

VERSION="${1:-$(git describe --tags --always --dirty 2>/dev/null || echo 0.0.0-dev)}"
VERSION="${VERSION#v}"                                  # strip a leading "v"
NAME="goldeneye-pc-port-${VERSION}-win64"
OUT="dist/${NAME}"
MINGW="${MINGW_PREFIX:-/mingw64}"

EXE="$(ls build-pc/ge007*.exe 2>/dev/null | head -n1 || true)"
[ -n "$EXE" ] || { echo "error: no build-pc/ge007*.exe found — run ./build-pc.sh first" >&2; exit 1; }

echo "==> Bundling $EXE  ->  $NAME"
rm -rf "$OUT"
mkdir -p "$OUT/licenses"
cp "$EXE" "$OUT/"

# --- runtime DLLs ---------------------------------------------------------
# Explicit allowlist; the closure check below fails the build if the exe needs
# a MinGW DLL that is not on this list.
DLLS=(
  SDL2.dll
  zlib1.dll
  libwinpthread-1.dll
  libstdc++-6.dll
  libgcc_s_seh-1.dll
  libssp-0.dll
)
for d in "${DLLS[@]}"; do
  if [ -f "$MINGW/bin/$d" ]; then
    cp "$MINGW/bin/$d" "$OUT/"
    echo "    + $d"
  else
    echo "    . $d (not in $MINGW/bin — skipped)"
  fi
done

# --- verify the dependency closure --------------------------------------
missing=0
if command -v ldd >/dev/null 2>&1; then
  while read -r name _ path _; do
    case "$path" in
      "$MINGW"/*|*/mingw64/*)
        [ -f "$OUT/$name" ] || { echo "    MISSING: $name  ($path)" >&2; missing=1; } ;;
    esac
  done < <(ldd "$EXE")
else
  echo "    (ldd unavailable — skipping closure check)"
fi
[ "$missing" -eq 0 ] || { echo "error: exe needs MinGW DLLs that were not bundled (see above)" >&2; exit 1; }

# --- docs + licenses ---------------------------------------------------
EXE_NAME="$(basename "$EXE")"
sed -e "s|@VERSION@|${VERSION}|g" \
    -e "s|@PLATFORM@|Windows x86-64|g" \
    -e "s|@EXE@|${EXE_NAME}|g" \
    -e "s|@DEPS@||g" \
    -e "s|@DECK@||g" \
    -e "s|@LICENSE_EXTRA@|, the MinGW runtime|g" \
    tools_pc/dist/README.md.in > "$OUT/README.md"
cp NOTICE  "$OUT/licenses/NOTICE"
cp LICENSE "$OUT/licenses/LICENSE-port-MIT.txt"
[ -f port/fast3d/LICENSE.txt ] && cp port/fast3d/LICENSE.txt "$OUT/licenses/LICENSE-fast3d.txt"
for l in SDL2 zlib gcc-libs libwinpthread mingw-w64; do
  [ -d "$MINGW/share/licenses/$l" ] && cp -r "$MINGW/share/licenses/$l" "$OUT/licenses/$l"
done

# --- asset-prep tool -------------------------------------------------
# The port needs two ROM-derived directories (data/pcmodels-<region>/ and
# data/pccg-<region>/) that we cannot ship. prepare-assets.py regenerates
# them from the user's own ROM using only the Python standard library. It is
# assembled fresh from the tree here so it can never drift from the emit
# scripts. The vendored inputs are decomp layout/symbol metadata (.inc.c /
# .csv), NOT game assets (no textures, audio, models, levels, or text).
PREP="$OUT/prepare-assets"
mkdir -p "$PREP/vendor/scripts" "$PREP/vendor/assets/obseg"
cp tools_pc/dist/prepare-assets/prepare-assets.py "$PREP/"
cp tools_pc/d43_emit.py tools_pc/d69_emit.py       "$PREP/"
cp tools_pc/d88_emit.py tools_pc/d88_propdefs.py   "$PREP/"   # d88 = per-level stage setup (+ its only local import)
cp scripts/filelist.u.csv                          "$PREP/vendor/scripts/"
cp assets/obseg/file_resource_table.inc.c          "$PREP/vendor/assets/obseg/"
# d43_emit.py os.walk()s assets/ for every *modelFileHeader.inc.c — preserve paths.
( cd . && find assets -iname 'modelfileheader.inc.c' -print0 \
    | xargs -0 -I{} cp --parents {} "$PREP/vendor/" )
nmh="$(find "$PREP/vendor/assets" -iname 'modelfileheader.inc.c' | wc -l)"
echo "    + prepare-assets/ (emit scripts + $nmh model headers)"
[ "$nmh" -gt 400 ] || { echo "error: prepare-assets vendored only $nmh model headers — expected ~512" >&2; exit 1; }

# Frozen first-run converter (drop-in ROM support): the engine spawns this
# when data/pcmodels-* / data/pccg-* are missing (port/src/romconvert.c).
# CI builds it with PyInstaller before bundling; a local bundle needs the
# same step:  python -m PyInstaller --onefile --name ge007-convert \
#                --distpath tools_pc/dist/prepare-assets \
#                tools_pc/dist/prepare-assets/prepare-assets.py
CV="$REPO_ROOT/tools_pc/dist/prepare-assets/ge007-convert.exe"
[ -f "$CV" ] || { echo "error: $CV not found — freeze it with PyInstaller first (see above)" >&2; exit 1; }
cp "$CV" "$PREP/"
echo "    + prepare-assets/ge007-convert.exe ($(du -h "$CV" | cut -f1))"

# --- guard: no ROM / game data snuck in --------------------------------
if find "$OUT" -type f \( -iname '*.z64' -o -iname '*.n64' -o -iname '*.v64' \) | grep -q .; then
  echo "error: bundle contains a ROM image — aborting" >&2
  exit 1
fi
# 120 MB: engine + DLLs are a few MB; the frozen ge007-convert (PyInstaller
# --onefile CPython) adds ~15 MB. Anything far beyond that is game data.
BYTES="$(du -sb "$OUT" | cut -f1)"
LIMIT=$((120 * 1024 * 1024))
if [ "$BYTES" -gt "$LIMIT" ]; then
  echo "error: bundle is $BYTES bytes (> 120 MB) — likely contains game data, aborting" >&2
  exit 1
fi

# --- zip + checksum --------------------------------------------------
# Prefer InfoZIP `zip`; fall back to 7-Zip or PowerShell Compress-Archive so a
# stock MSYS2 MINGW64 shell (which ships neither `zip` nor `unzip`) still works.
zip_dir() {  # $1 = archive name, $2 = dir to add (both relative to dist/)
  if command -v zip >/dev/null 2>&1; then
    ( cd dist && zip -qr "$1" "$2" )
  elif command -v 7z >/dev/null 2>&1; then
    ( cd dist && 7z a -tzip -bso0 -bsp0 "$1" "$2" >/dev/null )
  elif [ -x "/c/Program Files/7-Zip/7z.exe" ]; then
    ( cd dist && "/c/Program Files/7-Zip/7z.exe" a -tzip -bso0 -bsp0 "$1" "$2" >/dev/null )
  elif command -v powershell >/dev/null 2>&1; then
    ( cd dist && powershell -NoProfile -Command \
        "Compress-Archive -Force -Path '$2' -DestinationPath '$1'" )
  else
    echo "error: need one of: zip, 7z, or powershell to package the bundle" >&2
    exit 1
  fi
}
( cd dist && rm -f "${NAME}.zip" "${NAME}.zip.sha256" )
zip_dir "${NAME}.zip" "$NAME"
( cd dist && sha256sum "${NAME}.zip" > "${NAME}.zip.sha256" )

echo "==> dist/${NAME}.zip  ($(du -h "dist/${NAME}.zip" | cut -f1))"
cat "dist/${NAME}.zip.sha256"
( cd dist && unzip -l "${NAME}.zip" ) 2>/dev/null \
  || find "$OUT" -type f | sed "s#^dist/##" | sort