#!/bin/sh

URL="https://github.com/86Box/roms/archive/refs/tags/%%DISTVERSIONPREFIX%%%%DISTVERSION%%.zip"
DEFAULT_TARGET_DIR="$HOME/.local/share/86Box/"
TARGET_DIR=${TARGET_DIR:-$DEFAULT_TARGET_DIR}

install_roms() {
  if [ -d "$TARGET_DIR" ] && [ "$(ls -A $TARGET_DIR)" ]; then
    echo "ROMs already installed in $TARGET_DIR"
    echo "To (re)install, please first remove ROMs with -r parameter"
    exit 1
  fi

  TMP_DIR=$(mktemp -d)
  TMP_FILE="$TMP_DIR/86Box-ROMs.zip"
  echo "Fetching ROMs..."
  fetch -qo "$TMP_FILE" "$URL"

  if [ $? -ne 0 ]; then
    echo "Failed to download the file from $URL"
    exit 1
  fi

  echo "Extracting ROMs..."
  mkdir -p "$TARGET_DIR"
  unzip -q "$TMP_FILE" -d "$TARGET_DIR"

  if [ $? -ne 0 ]; then
    echo "Failed to decompress the file"
    rm "$TMP_FILE"
    exit 1
  fi

  mv "$TARGET_DIR/roms-"* "$TARGET_DIR/roms"
  rm -rf "$TMP_DIR"
  echo "ROMs installed successfully in $TARGET_DIR"
}

remove_roms() {
  if [ -d "$TARGET_DIR/roms" ]; then
    rm -rf "$TARGET_DIR/roms"
    echo "ROMs removed successfully from $TARGET_DIR"
  else
    echo "No ROMs directory found in $TARGET_DIR"
  fi
}

help() {
  echo ""
  echo "$0 [-h|-i|-r]"
  echo "  -h : this help"
  echo "  -i : install ROMs (this parameter can be omitted)"
  echo "  -r : remove the ROMs"
  echo ""
}

case "$1" in
  -h)
   help
   ;;
  -r)
    remove_roms
    ;;
  -i|*)
    install_roms
    ;;
esac

exit 0