#!/usr/bin/env sh
set -eu

ROOT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)"
OUTPUT_DIR="${PLATFORM_AGENT_RELEASE_DIR:-$ROOT_DIR/dist/release}"
STAGE_DIR="$(mktemp -d)"

cleanup() { rm -rf "$STAGE_DIR"; }
trap cleanup EXIT INT TERM

require_file() {
  if [ ! -e "$ROOT_DIR/$1" ]; then
    printf 'Missing required file: %s\n' "$1" >&2
    exit 1
  fi
}

for file in package.json bun.lock tsconfig.json agent.config.json src scripts/install.sh scripts/setting.sh scripts/uninstall.sh scripts/installer-tui/main.go; do
  require_file "$file"
done

build_tui() {
  arch="$1"
  output="$ROOT_DIR/scripts/installer-tui/installer-tui-linux-$arch"

  if command -v go >/dev/null 2>&1; then
    (
      cd "$ROOT_DIR/scripts/installer-tui"
      GOOS=linux GOARCH="$arch" go build -o "$output" .
    )
    return
  fi

  if command -v docker >/dev/null 2>&1; then
    docker run --rm \
      --user "$(id -u):$(id -g)" \
      -e GOCACHE=/tmp/go-build-cache \
      -e GOOS=linux \
      -e GOARCH="$arch" \
      -v "$ROOT_DIR/scripts/installer-tui:/src" \
      -w /src \
      golang:1.22-alpine \
      sh -c "go build -o installer-tui-linux-$arch ."
    return
  fi

  printf '%s\n' 'Go or Docker is required to build installer binaries.' >&2
  exit 1
}

package_archive() {
  arch="$1"
  package_dir="$STAGE_DIR/platform-agent"
  archive="$OUTPUT_DIR/platform-agent-linux-$arch.tar.gz"

  rm -rf "$package_dir"
  mkdir -p "$package_dir/scripts/installer-tui"

  cp "$ROOT_DIR/package.json" "$ROOT_DIR/bun.lock" "$ROOT_DIR/tsconfig.json" "$ROOT_DIR/agent.config.json" "$package_dir/"
  cp -R "$ROOT_DIR/src" "$package_dir/src"
  cp -R "$ROOT_DIR/scripts/." "$package_dir/scripts/"

  rm -f "$package_dir/scripts/installer-tui/installer-tui" \
    "$package_dir/scripts/installer-tui/installer-tui-linux-amd64" \
    "$package_dir/scripts/installer-tui/installer-tui-linux-arm64"
  cp "$ROOT_DIR/scripts/installer-tui/installer-tui-linux-$arch" "$package_dir/scripts/installer-tui/"
  chmod +x "$package_dir/scripts/install.sh" "$package_dir/scripts/setting.sh" "$package_dir/scripts/uninstall.sh" \
    "$package_dir/scripts/installer-tui/installer-tui-linux-$arch"

  tar -C "$STAGE_DIR" -czf "$archive" platform-agent
  printf 'Created %s\n' "$archive"
}

mkdir -p "$OUTPUT_DIR"
build_tui amd64
build_tui arm64
package_archive amd64
package_archive arm64

if command -v sha256sum >/dev/null 2>&1; then
  (
    cd "$OUTPUT_DIR"
    sha256sum platform-agent-linux-amd64.tar.gz platform-agent-linux-arm64.tar.gz > checksums.txt
  )
  printf 'Created %s/checksums.txt\n' "$OUTPUT_DIR"
fi