#!/bin/bash
set -euo pipefail

ROOT_SRC=".."
PREFIX="${PREFIX:-/usr/local}"

INSTALL_DIR="$PREFIX/bin"

TARGET_NAME="convert-dirs"
SCRIPT_NAME="$TARGET_NAME.sh"
SCRIPT_PATH="$ROOT_SRC/$SCRIPT_NAME"

# Optional --prefix CLI override
while [[ $# -gt 0 ]]; do
  case "$1" in
    --prefix)
      PREFIX="$2"
      INSTALL_DIR="$PREFIX/bin"
      shift 2
      ;;
    --help|-h)
      echo "Usage: $0 [--prefix /desired/install/path]" >&2
      echo 0
      ;;
    *)
      echo "Unknown option: $1"
      echo "Usage: $0 [--prefix /desired/install/path]" >&2
      exit 1
      ;;
  esac
done

# Check script exists
if [[ ! -f "$SCRIPT_PATH" ]]; then
  echo "❌ Error: Expected to find $SCRIPT_NAME at: $SCRIPT_PATH" >&2
  exit 1
fi

# Copy to install location
echo "📦 Installing $SCRIPT_NAME to $INSTALL_DIR/$TARGET_NAME ..."
sudo install -m 755 "$SCRIPT_PATH" "$INSTALL_DIR/$TARGET_NAME"

echo "Installed successfully."
echo "Run it with: $TARGET_NAME"
echo "Add to your PATH if not already:"
echo " export PATH=\"$INSTALL_DIR:\$PATH\""