#!/bin/bash
set -euo pipefail

DEBUG=false

# --- Resolve project root directory (always works regardless of where script is run from) ---
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT_SRC="$(cd "$SCRIPT_DIR/.." && pwd)"

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
    --debug)
      DEBUG=true
      shift
      ;;
    --prefix)
      PREFIX="$2"
      INSTALL_DIR="$PREFIX/bin"
      shift 2
      ;;
    --help|-h)
      echo "Usage: $0 [--prefix /desired/install/path]" >&2
      exit 0
      ;;
    *)
      echo "Unknown option: $1"
      echo "Usage: $0 [--prefix /desired/install/path]" >&2
      exit 1
      ;;
  esac
done

if [[ "$DEBUG" == true ]]; then
  echo "🪵 Debug mode enabled"
  echo "PREFIX: $PREFIX"
  echo
  echo "SCRIPT_DIR: $SCRIPT_DIR"
  echo "ROOT_SRC: $ROOT_SRC"
  echo
  echo "INSTALL_DIR: $INSTALL_DIR"
  echo "TARGET_NAME: $TARGET_NAME"
  echo "SCRIPT_NAME: $SCRIPT_NAME"
  echo "SCRIPT_PATH: $SCRIPT_PATH"
fi

# 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\""