#!/bin/bash

set -xv 


#June 2019
## for e16 in conjunction with its epplet eslides
#to change images upon start up of desktop
#for desktop background
#for arch type Linux systems
#placed in /usr/local/bin/e16loadbackgrounds
#called from e16 session.sh script
#

source1=/usr/share/backgrounds
source2=/media/data1/EtermBGs
source3=$HOME/.config/variety/Downloaded
source4=$HOME/.config/variety/Favorites
destination=$HOME/.e16/backgrounds

mkdir -p $destination
#remove old images and then add new ones

find $destination -type f -exec rm {} \;
amount=30

#image types
type1="*.png"
type2="*.jpg"

#check for dir presents then load if true

[[ -d "$source1" ]] && 
{ mapfile -t source1a < <(find "$source1" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }

[[ -d "$source2" ]] && 
{ mapfile -t source2a < <(find "$source2" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }

[[ -d "$source3" ]] && 
{ mapfile -t source3a < <(find "$source3" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }

[[ -d "$source4" ]] && 
{ mapfile -t source4a < <(find "$source4" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }


	#/usr/share/backgrounds
	#if array size is less than or equal to amount 
	if [[ ${#source1a[@]} -le $amount ]] ; then
		#just put all of them in 
		for (( i=0;i<${#source1a[@]};i++ )) ; do
			cp ${source1a[$i]} $destination
		done #if array is greater than amount
	elif [[ ${#source1a[@]} -gt $amount ]] ; then
		for (( i=0;i<$amount;i++ )) ; do
			#put some random images in directory
			cp  "${source1a[$(( RANDOM % ${#source1a[@]} ))]}" "$destination"
		done
	fi
	
		#/media/data1/EtermBGs
	#if array size is less than or equal to amount 
	if [[ ${#source2a[@]} -le $amount ]] ; then
		#just put all of them in 
		for (( i=0;i<${#source2a[@]};i++ )) ; do
			cp ${source2a[$i]} $destination
		done #if array is greater than amount
	elif [[ ${#source2a[@]} -gt $amount ]] ; then
		for (( i=0;i<$amount;i++ )) ; do
			#put some random images in directory
			cp  "${source2a[$(( RANDOM % ${#source2a[@]} ))]}" "$destination"
		done
	fi
	
	#$HOME/.config/variety/Downloaded
	#if array size is less than or equal to amount 
	if [[ ${#source3a[@]} -le $amount ]] ; then
		#just put all of them in 
		for (( i=0;i<${#source3a[@]};i++ )) ; do
			cp ${source3a[$i]} $destination
		done #if array is greater than amount
	elif [[ ${#source3a[@]} -gt $amount ]] ; then
		for (( i=0;i<$amount;i++ )) ; do
			#put some random images in directory
			cp  "${source3a[$(( RANDOM % ${#source3a[@]} ))]}" "$destination"
		done
	fi
	
	#$HOME/.config/variety/Favorites
	#if array size is less than or equal to amount 
	if [[ ${#source4a[@]} -le $amount ]] ; then
		#just put all of them in 
		for (( i=0;i<${#source4a[@]};i++ )) ; do
			cp ${source4a[$i]} $destination
		done #if array is greater than amount
	elif [[ ${#source4a[@]} -gt $amount ]] ; then
		for (( i=0;i<$amount;i++ )) ; do
			#put some random images in directory
			cp  "${source4a[$(( RANDOM % ${#source4a[@]} ))]}" "$destination"
		done
	fi
#to check to be sure it ran	
printf "%s ran me\n" > $HOME/rane16script

#check for dir presents then load if true

[[ -d "$source1" ]] && 
{ mapfile -t source1a < <(find "$source1" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }
+ [[ -d /usr/share/backgrounds ]]
+ mapfile -t source1a
++ shuf
++ find /usr/share/backgrounds -type f '(' -name '*.png' -o -name mpv-shot0003.jpg mpv-shot0023.jpg mpv-shot0024.jpg ')'
find: paths must precede expression: mpv-shot0023.jpg
Usage: find [-H] [-L] [-P] [-Olevel] [-D help|tree|search|stat|rates|opt|exec] [path...] [expression]

[[ -d "$source2" ]] && 
{ mapfile -t source2a < <(find "$source2" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }
+ [[ -d /media/data1/EtermBGs ]]
+ mapfile -t source2a
++ shuf
++ find /media/data1/EtermBGs -type f '(' -name '*.png' -o -name mpv-shot0003.jpg mpv-shot0023.jpg mpv-shot0024.jpg ')'
find: paths must precede expression: mpv-shot0023.jpg
Usage: find [-H] [-L] [-P] [-Olevel] [-D help|tree|search|stat|rates|opt|exec] [path...] [expression]

[[ -d "$source3" ]] && 
{ mapfile -t source3a < <(find "$source3" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }
+ [[ -d /home/userx/.config/variety/Downloaded ]]
+ mapfile -t source3a
++ shuf
++ find /home/userx/.config/variety/Downloaded -type f '(' -name '*.png' -o -name mpv-shot0003.jpg mpv-shot0023.jpg mpv-shot0024.jpg ')'
find: paths must precede expression: mpv-shot0023.jpg
Usage: find [-H] [-L] [-P] [-Olevel] [-D help|tree|search|stat|rates|opt|exec] [path...] [expression]

[[ -d "$source4" ]] && 
{ mapfile -t source4a < <(find "$source4" -type f \( -name $type1 -o -name $type2 \) | shuf) ; }
+ [[ -d /home/userx/.config/variety/Favorites ]]
+ mapfile -t source4a
++ shuf
++ find /home/userx/.config/variety/Favorites -type f '(' -name '*.png' -o -name mpv-shot0003.jpg mpv-shot0023.jpg mpv-shot0024.jpg ')'
find: paths must precede expression: mpv-shot0023.jpg
Usage: find [-H] [-L] [-P] [-Olevel] [-D help|tree|search|stat|rates|opt|exec] [path...] [expression]