#!/usr/bin/env bash
set -euo pipefail

# package-release.sh: Bundle the basemind binary with its dynamically-linked
# non-system native libraries (ONNX Runtime, Tesseract, Leptonica, libheif, image
# codecs, ...) into a self-contained, relocatable archive.
#
# Called after `cargo build --release --features full --bin basemind --target <triple>`,
# so the binary lives at `target/<triple>/release/`.
#
# Usage: package-release.sh <target-triple>
#   x86_64-unknown-linux-gnu | aarch64-unknown-linux-gnu
#   aarch64-apple-darwin     (Apple Silicon only — Intel macOS is unsupported)
#   x86_64-pc-windows-msvc
#
# Output: basemind-<triple>.tar.gz   (Linux/macOS: binary + lib/ at archive root)
#         basemind-<triple>.zip      (Windows: basemind.exe + *.dll at archive root)
# NOTE: the archive contents are at the ROOT (no leading staging-dir component) so
# the npm/pip/launcher consumers extract straight into their bin dir.

if [ $# -ne 1 ]; then
  echo "Usage: $0 <target-triple>" >&2
  exit 1
fi

TRIPLE="$1"

case "$TRIPLE" in
x86_64-unknown-linux-gnu | aarch64-unknown-linux-gnu)
  SYSTEM="linux"
  BINEXT=""
  ;;
aarch64-apple-darwin)
  SYSTEM="macos"
  BINEXT=""
  ;;
x86_64-pc-windows-msvc)
  SYSTEM="windows"
  BINEXT=".exe"
  ;;
*)
  echo "Unknown target triple: $TRIPLE" >&2
  exit 1
  ;;
esac

# cargo build --target <triple> writes here (NOT target/release/).
RELEASE_DIR="target/${TRIPLE}/release"
BINARY_PATH="${RELEASE_DIR}/basemind${BINEXT}"

if [ ! -f "$BINARY_PATH" ]; then
  echo "Binary not found at $BINARY_PATH" >&2
  exit 1
fi

STAGING_DIR="basemind-staging-${TRIPLE}"
rm -rf "$STAGING_DIR"
mkdir -p "$STAGING_DIR/lib"
cp "$BINARY_PATH" "$STAGING_DIR/basemind${BINEXT}"
BIN_IN_STAGING="$STAGING_DIR/basemind${BINEXT}"

case "$SYSTEM" in
linux)
  echo "Gathering Linux dynamic dependencies (ldd transitive closure)..."
  # ldd already reports the full transitive closure. Bundle everything EXCEPT
  # the glibc core (libc/libm/pthread/dl/rt/resolv, the loader, libgcc_s) — those
  # must come from the host to avoid ABI breakage. App libs that apt installs into
  # system dirs (e.g. libtesseract in /usr/lib/<triple>) ARE bundled.
  # Dedup is "already present in lib/" — no associative array, so this runs under
  # the Bash 3.2 that ships on macOS as well as the Bash 5 on the Linux runners.
  while IFS= read -r line; do
    lib=$(awk '{ for (i=1;i<=NF;i++){ if ($i=="=>" && $(i+1) ~ /^\//){print $(i+1); exit} if ($i ~ /^\// && $i !~ /^\(/){print $i; exit} } }' <<<"$line")
    [ -n "$lib" ] && [ -f "$lib" ] || continue
    base=$(basename "$lib")
    case "$base" in
    libc.so* | libm.so* | libpthread.so* | libdl.so* | librt.so* | libresolv.so* | \
      ld-linux*.so* | ld-musl*.so* | libgcc_s.so*) continue ;;
    esac
    [ -f "$STAGING_DIR/lib/$base" ] && continue
    cp -L "$lib" "$STAGING_DIR/lib/" 2>/dev/null || true
  done < <(ldd "$BIN_IN_STAGING" 2>/dev/null || true)

  # ORT (ort/download-binaries) may drop its .so into the build deps dir rather
  # than a system path ldd resolves.
  if [ -d "${RELEASE_DIR}/deps" ]; then
    for lib in "${RELEASE_DIR}/deps"/*.so*; do
      [ -f "$lib" ] || continue
      base=$(basename "$lib")
      [ -f "$STAGING_DIR/lib/$base" ] && continue
      cp -L "$lib" "$STAGING_DIR/lib/" 2>/dev/null || true
    done
  fi

  # shellcheck disable=SC2016  # literal $ORIGIN is intended — patchelf/ld expands it at load time
  patchelf --set-rpath '$ORIGIN/lib' "$BIN_IN_STAGING"
  tar czf "basemind-${TRIPLE}.tar.gz" -C "$STAGING_DIR" .
  echo "✓ Created basemind-${TRIPLE}.tar.gz"
  ;;

macos)
  echo "Gathering macOS dynamic dependencies (otool transitive closure)..."
  # BFS over otool -L starting at the binary. Bundle any referenced dylib that is
  # NOT an OS lib (/usr/lib, /System). Homebrew deps live under /opt/homebrew (arm)
  # or /usr/local (x86) — both are bundled. Track each lib's install-name token as
  # it appears in load commands so install_name_tool -change targets the right id.
  # macOS ships Bash 3.2 (no associative arrays), so the basename->old-path map is
  # kept as two parallel indexed arrays.
  copied_bases=()
  copied_olds=()
  was_copied() {
    [ ${#copied_bases[@]} -eq 0 ] && return 1
    local b="$1" existing
    for existing in "${copied_bases[@]}"; do
      [ "$existing" = "$b" ] && return 0
    done
    return 1
  }
  QUEUE=("$BIN_IN_STAGING")
  while [ ${#QUEUE[@]} -gt 0 ]; do
    cur="${QUEUE[0]}"
    QUEUE=("${QUEUE[@]:1}")
    # iterate dependency lines (skip the first line: the object's own id)
    otool -L "$cur" 2>/dev/null | tail -n +2 | while read -r dep _; do echo "$dep"; done >/tmp/_otool_$$ || true
    while IFS= read -r dep; do
      [ -n "$dep" ] || continue
      case "$dep" in
      /usr/lib/* | /System/*) continue ;;
      @rpath/* | @loader_path/* | @executable_path/*) continue ;; # already relocated
      esac
      [ -f "$dep" ] || continue
      base=$(basename "$dep")
      was_copied "$base" && continue
      cp -L "$dep" "$STAGING_DIR/lib/$base" 2>/dev/null || continue
      chmod u+w "$STAGING_DIR/lib/$base" 2>/dev/null || true
      copied_bases+=("$base")
      copied_olds+=("$dep")
      QUEUE+=("$STAGING_DIR/lib/$base")
    done </tmp/_otool_$$
    rm -f /tmp/_otool_$$
  done

  # Rewrite install names: each bundled lib -> @loader_path/lib/<name>, and rewrite
  # references in the binary and in every bundled lib.
  idx=0
  while [ "$idx" -lt ${#copied_bases[@]} ]; do
    base="${copied_bases[$idx]}"
    old="${copied_olds[$idx]}"
    install_name_tool -id "@loader_path/lib/$base" "$STAGING_DIR/lib/$base" 2>/dev/null || true
    install_name_tool -change "$old" "@loader_path/lib/$base" "$BIN_IN_STAGING" 2>/dev/null || true
    for other in "$STAGING_DIR/lib/"*.dylib; do
      [ -f "$other" ] || continue
      install_name_tool -change "$old" "@loader_path/$base" "$other" 2>/dev/null || true
    done
    idx=$((idx + 1))
  done
  install_name_tool -add_rpath "@loader_path/lib" "$BIN_IN_STAGING" 2>/dev/null || true

  tar czf "basemind-${TRIPLE}.tar.gz" -C "$STAGING_DIR" .
  echo "✓ Created basemind-${TRIPLE}.tar.gz"
  ;;

windows)
  echo "Gathering Windows DLL dependencies..."
  # vcpkg's libheif:x64-windows-static-md links libheif statically; the dynamic
  # piece is ONNX Runtime, co-located next to the .exe (Windows resolves DLLs from
  # the exe directory). MSVC runtime is assumed present on the host.
  # Dedup is "already present in the staging root" — no associative array needed.
  if [ -d "${RELEASE_DIR}/deps" ]; then
    for dll in "${RELEASE_DIR}/deps"/*.dll; do
      [ -f "$dll" ] || continue
      base=$(basename "$dll")
      [ -f "$STAGING_DIR/$base" ] && continue
      cp -L "$dll" "$STAGING_DIR/" 2>/dev/null || true
    done
  fi
  for ort_path in "C:/Program Files/onnxruntime" "C:/Program Files (x86)/onnxruntime" "${ONNXRUNTIME_ROOT:-}"; do
    [ -n "$ort_path" ] && [ -d "$ort_path/lib" ] || continue
    for dll in "$ort_path/lib"/*.dll; do
      [ -f "$dll" ] || continue
      base=$(basename "$dll")
      [ -f "$STAGING_DIR/$base" ] && continue
      cp -L "$dll" "$STAGING_DIR/" 2>/dev/null || true
    done
  done

  (cd "$STAGING_DIR" && {
    7z a -tzip "../basemind-${TRIPLE}.zip" . >/dev/null 2>&1 ||
      zip -q -r "../basemind-${TRIPLE}.zip" . ||
      powershell -Command "Compress-Archive -Path '*' -DestinationPath '../basemind-${TRIPLE}.zip' -Force"
  })
  echo "✓ Created basemind-${TRIPLE}.zip"
  ;;
esac

rm -rf "$STAGING_DIR"
echo "✓ Release package ready: basemind-${TRIPLE}.$([ "$SYSTEM" = "windows" ] && echo "zip" || echo "tar.gz")"