#!/usr/bin/env bash
# Fetch busybox-w32 into third_party/busybox/busybox.exe (Linux/CI host).
set -euo pipefail
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
DEST="$ROOT/third_party/busybox"
mkdir -p "$DEST"
OUT="$DEST/busybox.exe"

# Override with BUSYBOX_W32_URL if the default 404s / TLS fails.
URLS=(
  "${BUSYBOX_W32_URL:-}"
  "https://frippery.org/files/busybox/busybox-w64-FRP-5007-g82accfc19.exe"
  "https://frippery.org/files/busybox/busybox.exe"
)

ok=0
for URL in "${URLS[@]}"; do
  [[ -z "$URL" ]] && continue
  echo "Downloading $URL -> $OUT"
  if curl -fsSL -L --connect-timeout 20 -o "$OUT" "$URL"; then
    ok=1
    break
  fi
  echo "failed: $URL" >&2
done

cat > "$DEST/LICENSE.busybox" << 'EOF'
BusyBox is licensed under GPLv2. Obtain the corresponding source from the
upstream busybox-w32 / BusyBox project when redistributing the binary.
See: https://www.busybox.net/  https://frippery.org/busybox/
EOF

if [[ "$ok" -ne 1 ]]; then
  cat >&2 <<'EOF'
Could not download busybox-w32 automatically.
Manual steps:
  1. Visit https://frippery.org/busybox/ or busybox-w32 releases
  2. Save the 64-bit binary as agent/third_party/busybox/busybox.exe
  3. Copy it next to cst-agent.exe on Windows releases
EOF
  exit 1
fi

chmod +x "$OUT" || true
file "$OUT" || true
ls -la "$OUT"
echo "OK: place this next to cst-agent.exe on Windows releases."