#!/bin/sh
###
## Wrapper script that enables loading of compressed roms for RetroArch.
## Author: Themaister
## License: Do whatever you want with it.
#

die()
{
   echo "Error: $1"
   rm "${TMPROM}"
   rm -r "${TMPDIR}"
   exit 1
}

if [ -z "$1" ]; then
   die "Need at least one argument"
fi

COMP_FILE="$1"
TMPROM="`mktemp`"
TMPDIR="`mktemp -d`"
shift

extract_zip()
{
   which unzip >/dev/null 2>&1 || die "Cannot find unzip"
   unzip "$1" -d "${TMPDIR}" >/dev/null 2>&1 || die "Couldn't extract from archive"
}

extract_7z()
{
   which 7z >/dev/null 2>&1 || die "Cannot find 7z"
   7z x "$1" -o"${TMPDIR}" >/dev/null 2>&1 || die "Couldn't extract from archive"
}

extract_rar()
{
   which unrar >/dev/null 2>&1 || die "Cannot find unrar"
   unrar x "$1" "${TMPDIR}" >/dev/null 2>&1 || die "Couldn't extract from archive"
}

case "${COMP_FILE}" in
   *.zip )
      extract_zip "${COMP_FILE}"
      EXTENSION=".zip"
      ;;
   *.7z )
      extract_7z "${COMP_FILE}"
      EXTENSION=".7z"
      ;;
   *.rar )
      extract_rar "${COMP_FILE}"
      EXTENSION=".rar"
      ;;
   * )
      die "Couldn't find valid zipped rom."
      ;;
esac

# pick the largest non-directory in the root of the unpacked archive
FILENAME="`ls -Sp \"${TMPDIR}\" | grep -v /$ | head -n1`"
if [ -z "${FILENAME}" ]; then
	die "Cannot find any files in root of archive"
fi
mv "${TMPDIR}/${FILENAME}" "${TMPROM}"

SAVENAME="`basename \"${COMP_FILE}\" ${EXTENSION}`"
DIRNAME="`dirname \"${COMP_FILE}\"`"
SAVENAME="${SAVENAME}.srm"

EXE="`which retroarch`"
if [ -z "${EXE}" ]; then
   die "Cannot find RetroArch in path."
fi

echo "Temp ROM: ${TMPROM}"
echo "Savename: ${DIRNAME}/${SAVENAME}"
"${EXE}" "${TMPROM}" -s "${DIRNAME}/${SAVENAME}" "$@"
rm "${TMPROM}"
rm -r "${TMPDIR}"