#!/bin/sh

source "$(dirname $0)/env-vars.sh"

# choose a libretro core.
cd ${HOME}/lib
BACKEND=$(ls -1 libretro*.so | zenity --list --column=Backend)
cd ${HOME}

# if user didn't select a libretro, bail out.
[ -z "${BACKEND}" ] && exit 0

# narrow down the available file formats for the file chooser.
FILTER='All files (*)|*'
case "${BACKEND}" in
	libretro-fceu*.so | libretro-bnes.so)
		FILTER='NES (*.nes)|*.nes'
		;;
	libretro-pocketsnes.so | libretro-snes9x*.so)
		FILTER='SNES (*.sfc)|*.sfc'
		;;
	libretro-gambatte.so)
		FILTER='GBC (*.gb; *.gbc)|*.gb *.gbc'
		;;
	libretro-meteor.so | libretro-vba.so | libretro-gpsp.so)
		FILTER='GBA (*.gba)|*.gba'
		;;
	libretro-imame4all.so | libretro-fba.so)
		FILTER='Arcade (*.zip)|*.zip'
		;;
	libretro-genplus.so)
		FILTER='Genesis/MegaDrive/SegaCD (*.md; *.gen; *.bin; *.iso)|*.md *.gen *.bin *.iso'
		;;
	libretro-pcsx-rearmed.so)
		FILTER='Disc image (*.iso; *.bin; *.img)|*.iso *.bin *.img'
		;;
	libretro-prboom.so)
		FILTER='Doom (*.wad)|*.wad'
		;;
esac

# try to point the file chooser at the last used path, if there is one.
LASTROM=
if [ -r "${BACKEND}-lastrom.txt" ] ; then
	LASTROM="--filename="$(head -1 "${BACKEND}-lastrom.txt")
fi

ROM=$(zenity --file-selection --file-filter="${FILTER}" "${LASTROM}")

# if user didn't select a ROM, bail out.
[ -z "${ROM}" ] && exit 0

echo "${ROM}" > "${BACKEND}-lastrom.txt"

# latest notaz SDL that knows what "pixelperfect" is
exec env LD_PRELOAD=${HOME}/lib/libSDL-1.2.so.0.11.3 retroarch "${ROM}" -L "${HOME}/lib/${BACKEND}" "${@}"