#!/bin/bash

# Get themes.csv and sets.cvs from https://rebrickable.com/downloads


echo "----> Starting Download of all LEGO instructions from https://brickset.com/exportscripts/instructions"
firstline=0
logfile="lego_errors.log"
downloadFolder="../Instructions"
#error_level: 
#	0 no errors reported
#	1 Download errors reported
#	2 Existing files and download errors reported
error_level=0
echo "" > $logfile

THEMES="themes.csv"
SETS="sets.csv"

if [ -f "instructions" ]; then
	echo "---> Using existing instructions file. Manually delete it to redownload..."
else 
	echo -ne "---> Downloading csv from Brickset..."
	wget https://brickset.com/exportscripts/instructions &> /dev/null  
	if [[ "$?" != 0 ]]; then
		echo "Error... Exiting!"
		exit; 
	else
		echo "Done!" 
	fi
fi

echo "----> Converting csv with ',' to '|'..."
head -1 instructions | sed 's/,/|/g' > instructions.csv
sed 1,1d instructions | sed -r 's/("[^",]+),([^",]+")/\1###\2/g' | awk -F, '{print $1,$2,$3,$4,$5,$6}' | sed 's/###/,/g' | sed 's/" "/"|"/g' >> instructions.csv

while IFS='|' read -r ID LINK NAME DESC ADDED RETRIVED
do

	#echo $ID $LINK $NAME $DESC $ADDED $RETRIVED

	if [ "$firstline" = 0 ]; then
		firstline=1
	else
		#echo "I got:$ID - $LINK - $NAME - $DESC - $ADDED - $RETRIVED"
			
		tID=$(sed -e 's/^"//' -e 's/"$//' <<<"$ID")
		tLINK=$(sed -e 's/^"//' -e 's/"$//' <<<"$LINK")
		#tNAME=$(sed -e 's/^"//' -e 's/"$//' <<<"$NAME")
		ttNAME=$(cut -d, -f1-2 sets.csv | grep -w $tID | cut -d, -f2)
		setYEAR=$(grep -w $tID sets.csv | cut -d, -f3)
		setNAME=$(sed -e 's/[^A-Za-z0-9._-]/_/g' <<< $ttNAME)
		themeID=$(grep -w $tID sets.csv | cut -d, -f4)
		themeName=$(awk -F',' -v id="$themeID" '$1 == id' themes.csv)
		IFS=',' read -r -a array <<< "$themeName"  
		tempID=${array[2]}
		if [[ $tempID != "" ]]; then
			while [[ $tempID != "" ]]  
			do 	 
				#echo "tempID: $tempID"
		 		tthemeName=$(awk -F',' -v id="$tempID" '$1 == id' themes.csv)
		 		#echo $tthemeName 	 
				IFS=',' read -r -a tArray <<< "$tthemeName"
		 		#echo "<${tArray[2]}>"
		 		tempID=${tArray[2]}
		 		themeName=${tArray[1]}
			done 
		else  
			themeName=${array[1]} 
		fi

		setTHEME=$(sed -e 's/[^A-Za-z0-9._-]/_/g' <<< $themeName)
	
		#echo $setYEAR	
		
		tADDED=$(sed -e 's/^"//' -e 's/"$//' <<<"$ADDED")
		tDESC=$(sed -e 's/^"//' -e 's/"$//' <<<"$DESC")
		ttDESC=$(echo $tDESC | grep -Eo '\s[0-9]{1}\s?\/\s?[0-9]{1,2}' | sed 's/ //g' | sed 's/\//_of_/g')
		
		if [ -z "$ttDESC" ]; then
			setDESC="_"
		else
			setDESC="_("$ttDESC")_"
		fi

		tFilename=""$tID""$setDESC""${setNAME// /_}"_("$setTHEME"_"$setYEAR").pdf"
		filename=$tFilename

		if [ -f "$downloadFolder/$filename" ]; then
			echo "-> $tID exists. Skipping..."
			if [[ $error_level = 2 ]]; then
				echo "$filename exists." >> $logfile
			fi 	
		else
			if [[ "$tDESC" = "{No longer listed at LEGO.com}" ]] ; then
				echo "-> $tID is not available. Skipping..."
				if [[ $error_level = 1 || $error_level = 2 ]]; then
					echo "$filename is not available." >> $logfile
				fi
			else  
			 	#echo "___ URL $tLINK"
				echo -ne "--> $tID downloading now..."
				curl -H "Mozilla/5.0 (platform; rv:75.0) Gecko/20100101 Firefox/75.0" -L $tLINK --silent --output "$downloadFolder/$filename"
				#wget -T20 --tries=3 --retry-connrefused --continue -O "Instructions/$filename" $tLINK
				if [ -f "$downloadFolder/$filename" ]; then
					echo "Done! > $filename"
				else
					echo "ERROR!"
					if [[ $error_level = 1 || $error_level = 2 ]]; then  
					  echo 
						echo "--> Not downloaded. Try again manually..."
						echo "$filename was not downloaded. Check CURL" >> $logfile
					fi
				fi
				#random sleep in order to not look like a script
				sleep $(( ( RANDOM % 5 )  + 1 ))
			fi
		fi
	fi
	
done < instructions.csv