FROM golang:1.22-bookworm

WORKDIR /app

ENV PORT=7860
ENV ADDR=:7860
ENV CGO_ENABLED=0

RUN cat <<'EOF' > /usr/local/bin/run-gateway
#!/bin/sh
set -eu

if [ -n "${PORT:-}" ]; then
  export ADDR=":${PORT}"
fi

if [ -n "${GO_CODE_B64:-}" ]; then
  printf '%s' "$GO_CODE_B64" | base64 -d > /app/main.go
elif [ -n "${GO_CODE:-}" ]; then
  printf '%s' "$GO_CODE" > /app/main.go
else
  echo "missing GO_CODE_B64 or GO_CODE" >&2
  exit 2
fi

if [ -n "${GO_MOD_B64:-}" ]; then
  printf '%s' "$GO_MOD_B64" | base64 -d > /app/go.mod
elif [ -n "${GO_MOD:-}" ]; then
  printf '%s' "$GO_MOD" > /app/go.mod
elif [ ! -f /app/go.mod ]; then
  cat > /app/go.mod <<'MOD'
module hf-space-gateway

go 1.22
MOD
fi

go mod tidy >/dev/null 2>&1 || {
  echo "build failed" >&2
  exit 2
}

go build -trimpath -ldflags="-s -w" -o /tmp/gateway . >/dev/null 2>&1 || {
  echo "build failed" >&2
  exit 2
}

exec /tmp/gateway
EOF

RUN chmod +x /usr/local/bin/run-gateway

EXPOSE 7860

CMD ["/usr/local/bin/run-gateway"]