#! /bin/bash
#
# Download and install The Bezel Project for Batocera
#
# @evoflash and @lbrpdx on Batocera Forums and Discord
#
# Usage:
# batocera-es-thebezelproject 'list', 'install or remove <system_name>'
#
#

DECODIR="/storage/roms/"
ROMSDIR="/storage/roms/"
DEFAULTBEZELDIR="default/systems/"
BEZELPROJECTDIR="bezels/"
BEZELPROJECTGAMESDIR="${BEZELPROJECTDIR}"
BEZELPROJECTSYSTEMDIR="${BEZELPROJECTDIR}"
BEZELSLIST="https://pastebin.com/raw/C4wdxTMv"
LOCALBEZELSLIST="/storage/.config/distribution/configs/bezels.txt"
# bezels.txt must be a plain file with the format 'bezel_name https://githubURL' (spaces or tabs)
# Example of a bezels.txt file:
# fba	https://github.com/thebezelproject/bezelproject-MAME
# snes	https://github.com/thebezelproject/bezelproject-SNES
DEBUG=0
EE_TMP="/tmp/overlays"

###############################
#
function usage() {
	echo "$(basename $0) - downloads and installs The Bezel Project for Batocera"
	echo " "
	echo "It accepts three modes: 'list', 'install' and 'remove' <system>'"
	echo "- 'list' for the list of systems installed on the system, and available within TheBezelProject, and if they are"
	echo "   [A]vailable to install, [I]nstalled or [?]unknown."
	echo "- 'install <system>' to install the bezels for this <system>."
	echo "- 'remove <system>' to remove the bezels for this <system>."
	echo "- 'remove all' to remove all the bezels."
	echo " "
	echo "If you have a local $LOCALBEZELSLIST file,"
	echo "it will override the one hosted on Batocera website."
	return 1
}

###############################
# check if url format is valid
function check_url() {
	[[ "$1" =~ ^(https?|ftp)://.*$ ]] && echo "[A]" || echo "[?]"
}

###############################
# return the git name
function git_name() {
	echo "$1" | sed "s,.*/\(.*\),\1,"
}

###############################
# return the number of files in a directory
function files_count() {
	echo `find "$1" -maxdepth 1 -type f -name "[!.]*" | wc -l`
}

###############################
#
function list() {
	local count=0
	local fn=$(date +"%s")
	local tmp="$EE_TMP/bezels_$fn"
	local filescount
	local systemname
	local url

	[ $DEBUG -eq 1 ] && echo "DEBUG: path to bezels ${DECODIR}${BEZELPROJECTGAMESDIR}"
	echo "* 351ELEC bezels *"
	
	# create temporary files in /tmp
	if [ -f $LOCALBEZELSLIST ]; then
		cp -f "$LOCALBEZELSLIST" "${tmp}"
	else
		curl -H 'Cache-Control: no-cache' -sfL "$BEZELSLIST" -o "${tmp}" || return 1
		sed -i 's/\r$//' "${tmp}"
	fi
	
	# reading bezels list from configuration file
	while IFS=$' \t' read systemname url ; do
		[ -z "${systemname}" ] && continue
		let count+=1
		[ $DEBUG -eq 1 ] && echo "DEBUG: bezels for system ${systemname} (from bezels list)"
		# check if roms/<system> directory exist
		if [ ! -d "${ROMSDIR}${systemname}" ]; then continue; fi
		# there is at least one file in each roms/<system> directory (i.e. _info.txt)
		filescount=$(files_count "${ROMSDIR}${systemname}")
		if [ "${filescount}" -le 1 ]; then	 continue; fi
		# check if url is valid and return [A] else [?]
		ia=$(check_url "${url}")
		# if games/<system> directory exist we assume the bezels are already installed
		if [ -d "${DECODIR}${BEZELPROJECTGAMESDIR}${systemname}" ]; then ia="[I]"; fi
		echo "$ia ${systemname} - ${url}"
	done < "${tmp}"
	
	[ $DEBUG -eq 1 ] && echo "DEBUG:  there are $count systems (from bezels list)"
	rm "${tmp}"
}

###############################
#
function install() {
	local count=0
	local installed_count=0
	local fn=$(date +"%s")
	local tmp="$EE_TMP/bezels_$fn"
	local gitname
	local gitsystem
	local filescount
	local filename
	local romname
	local systemname
	local url
	local systemtoinstall="$1"
	local systemfound=0
	
	[ $DEBUG -eq 1 ] && echo "DEBUG: path to bezels ${DECODIR}${BEZELPROJECTGAMESDIR}"

	# create temporary files in /tmp
	if [ -f $LOCALBEZELSLIST ]; then
		cp -f "$LOCALBEZELSLIST" "${tmp}"
	else
		curl -H 'Cache-Control: no-cache' -sfL "$BEZELSLIST" -o "${tmp}" || return 1
		sed -i 's/\r$//' "${tmp}"
	fi
	
	# reading bezels list from configuration file
	while IFS=$' \t' read systemname url ; do
		[ -z "${systemname}" ] && continue
		[ $DEBUG -eq 1 ] && echo "DEBUG: bezels for system ${systemname} (from bezels list)"
		[ "${systemname}" != "${systemtoinstall}" ] && continue
		# check if url is valid and return [A] else [?]
		ia=$(check_url "${url}")
		if [ "$ia" != "[A]" ]; then
			echo "Error - invalid bezels URL ${url}"
			return 1
		else
			systemfound=1
			break
		fi
	done < "${tmp}"
	rm "${tmp}"
	
	# in case of TheBezelProject does not own the system we want to install
	if [ "$systemfound" -eq 0 ]; then
		echo -n "Error - system ${systemtoinstall} could not be found in "
		[ -f $LOCALBEZELSLIST ] && echo "$LOCALBEZELSLIST" || echo "$BEZELSLIST"
		return 1
	fi

	# check if roms/<system> directory exists
	if [ ! -d "${ROMSDIR}${systemtoinstall}" ]; then
		echo "Error - ROMs directory for system ${systemtoinstall} could not be found"
		return 1
	fi
	
	# there is at least one file in each roms/<system> directory (i.e. _info.txt)
	filescount=$(files_count "${ROMSDIR}${systemtoinstall}")
	[ $DEBUG -eq 1 ] && echo "DEBUG: roms files count ${filescount}"
	if [ "${filescount}" -le 1 ]; then
		echo "Error - ROMs directory for system ${systemtoinstall} is empty"
		return 1
	fi

	# create temporary directory in /tmp
	fn=$(date +"%s")
	tmp="$EE_TMP/dl_$fn"
	[ $DEBUG -eq 1 ] && echo "DEBUG: path to roms ${ROMSDIR}${systemtoinstall}"
	[ $DEBUG -eq 1 ] && echo "DEBUG: path for downloading ${tmp}"
	# extract gitname from the url
	gitname=$(git_name "${url}")
	# keep only the final word for searching sub-folders of /retroarch/overlay/GameBezels/<gitsystem>
	gitsystem=${gitname#bezelproject-}
	mkdir -p "${tmp}"
	cd "${tmp}"
	echo "Downloading bezels for system ${systemtoinstall}"
	[ $DEBUG -eq 1 ] && echo "DEBUG: URL: ${url} OUT: ${gitname}.zip GITNAME: $gitname GITSYSTEM: $gitsystem"
	curl -H 'Cache-Control: no-cache' -sfL "${url}/archive/master.zip" -o "${gitname}.zip"
	# error while downloading ?
	if [[ "$?" -ne 0 || ! -f "${gitname}.zip" ]]; then
		echo "Error - ${gitname} zip file could not be downloaded from ${url}"
		# leave current directory and remove all downloads
		cd
		rm -r "${tmp}"
		return 1
	fi
	
	# if it doesn't already exist, create the games bezels directory
	if [ ! -d "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}" ]; then
		[ $DEBUG -eq 1 ] && echo "DEBUG: creating ${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}"
		mkdir -p "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}"
	else
		[ $DEBUG -eq 1 ] && echo "DEBUG: directory ${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall} already exist"
	fi
	
	# if it doesn't already exist, create the systems bezels directory
	if [ ! -d "${DECODIR}${BEZELPROJECTSYSTEMDIR}" ]; then
		[ $DEBUG -eq 1 ] && echo "DEBUG: creating ${DECODIR}${BEZELPROJECTSYSTEMDIR}"
		mkdir -p "${DECODIR}${BEZELPROJECTSYSTEMDIR}"
	else
		[ $DEBUG -eq 1 ] && echo "DEBUG: directory ${DECODIR}${BEZELPROJECTSYSTEMDIR} already exist"
	fi
	
	# unzip archive for working on and remove the zip file
	echo "Installing/Updating bezels for system ${systemtoinstall}..."
	unzip -q "${gitname}.zip"
	mv "${gitname}-master" "${gitname}"
	rm "${gitname}.zip"
	
	# install games bezels if provided by TheBezelProject
	echo "installing games bezels"
	echo 0 > "/tmp/bcount"
	echo 0 > "/tmp/bicount"
	find "${ROMSDIR}${systemtoinstall}" -maxdepth 1 -type f -iname "[!.]*" | sort -V |
	while read filename; do
		filename=$(basename "$filename")
		romname=${filename%%.*}
		[ -z "${romname}" ] && continue
		count=$((count + 1))
		echo $count > "/tmp/bcount"
		[ $DEBUG -eq 1 ] && echo "DEBUG: count -> $count"
		[ $DEBUG -eq 1 ] && echo "DEBUG: rom -> ${romname}"
		if [ "${systemtoinstall}" == "mame" ] || [ "${systemtoinstall}" == "arcade" ] || [ "${systemtoinstall}" == "fba" ] || [ "${systemtoinstall}" == "neogeo" ]; then
			# is there a matching PNG for arcade rom name ?
			EE_REALSYSTEM="ArcadeBezels"
			else
			EE_REALSYSTEM="GameBezels/${gitsystem}"
		fi
		
		if [ -f "${tmp}/${gitname}/retroarch/overlay/$EE_REALSYSTEM/${romname}.png" ]; then
			[ $DEBUG -eq 1 ] && echo "DEBUG: found PNG for ${romname}"
			# copy the matching PNG
			cp "${tmp}/${gitname}/retroarch/overlay/$EE_REALSYSTEM/${romname}.png" "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}"
			cp "${tmp}/${gitname}/retroarch/overlay/$EE_REALSYSTEM/${romname}.cfg" "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}"
		    sed -i '/overlay0_overlay/d' "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}/${romname}.cfg"
			echo "overlay0_overlay = \"${romname}.png\"" >> "${DECODIR}${BEZELPROJECTGAMESDIR}${systemtoinstall}/${romname}.cfg"
			installed_count=$((installed_count + 1))
			echo $installed_count > "/tmp/bicount"
			[ $DEBUG -eq 1 ] && echo "DEBUG: installed_count -> $installed_count"
		fi
	done
	echo "Bezels found" $(cat /tmp/bcount) "Bezels installed" $(cat /tmp/bicount)
	rm /tmp/bcount
	rm /tmp/bicount
	
	# install system bezel if provided by TheBezelProject
	echo "installing system bezel"
	# * Arcade *
	if [ "${systemtoinstall}" == "mame" ] || [ "${systemtoinstall}" == "arcade" ] || [ "${systemtoinstall}" == "fba" ] || [ "${systemtoinstall}" == "neogeo" ]; then
		# copy the HORIZONTAL system bezel to the correct directory and rename it
		cp "${tmp}/${gitname}/retroarch/overlay/MAME-Horizontal.png" "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}.png"
	else
		# * Other *
		filescount=$(find "${tmp}/${gitname}/retroarch/overlay" -maxdepth 1 -type f -name "*.png" | wc -l)
 		if [ "${filescount}" -eq 1 ]; then
			rm -f "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemname}.png"
			rm -f "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemname}.info"
 			# copy the system bezel to the correct directory and rename it
 			filename=$(ls -1 "${tmp}/${gitname}"/retroarch/overlay/*.png)
 			[ $DEBUG -eq 1 ] && echo "DEBUG: $filename ${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.png"
 			cp "$filename" "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.png"
 			filename=${filename%.*}
 			[ $DEBUG -eq 1 ] && echo "DEBUG: ${filename}.cfg ${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.cfg"
 			cp "${filename}.cfg" "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.cfg"
 			sed -i '/overlay0_overlay/d' "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.cfg"
			echo "overlay0_overlay = \"default.png\"" >> "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}/default.cfg"
 		else
			# make a symbolic link to the Batocera's bezel default system pack
			ln -fs "${DECODIR}${DEFAULTBEZELDIR}${systemtoinstall}.png" "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}.png"
			ln -fs "${DECODIR}${DEFAULTBEZELDIR}${systemtoinstall}.info" "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemtoinstall}.info"
		fi
	fi
	
#	# install default bezel (i.e. system not supported in TheBezelProject)
#	echo "installing default bezels"
#	if [ -d "${DECODIR}${BEZELPROJECTDIR}" ]; then
#		echo "TODO : install the @fery65's default.png bezel"
#	fi
	
	# leave current directory and remove all downloads
	echo "Bezels for system ${systemtoinstall} are now installed"
	cd
	rm -r "${tmp}"
}

###############################
#
function remove() {
	systemname="$1"
	
	#  do we want to remove all TheBezelProject ?
	if [ "${systemname}" == "all" ]; then
		if [ -d "${DECODIR}${BEZELPROJECTDIR}" ]; then
			read -p "Do you wish to remove all bezels ? " yn
			if [[ "$yn" = "y" || "$yn" = "Y" ]]; then
				rm -rf "${DECODIR}${BEZELPROJECTDIR}"
			fi
		else
			echo "Error - bezels directory ${DECODIR}${BEZELPROJECTDIR} is not valid"
			return 1
		fi
	else
		# check if games/<system> directory exist
		if [ ! -d "${DECODIR}${BEZELPROJECTGAMESDIR}${systemname}" ]; then
			echo "Error - bezels for system ${systemname} could not be found"
			return 1
		else
			rm -rf "${DECODIR}${BEZELPROJECTGAMESDIR}${systemname}"
			rm -f "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemname}.png"
			rm -f "${DECODIR}${BEZELPROJECTSYSTEMDIR}${systemname}.info"
		fi
	fi
}

###############################
#### Main loop
#
command="$1"
system="$2"
count=1
installed_count=1
if [ ! -d "${DECODIR}" ]; then
	echo "Error - decorations directory ${DECODIR} is not valid"
	exit 1
fi

if [[ "$command" == "list" ]]; then
	list
elif [[ "$command" == "install" && -n "$system" ]]; then
	 install "$system"
elif [[ "$command" == "remove" && -n "$system" ]]; then
	 remove "$system"
else
	usage
fi