#!/usr/bin/env bash

set -e

if [ ! -d $HOME/.flash ];then # If Directory does NOT exist
	echo "No '.flash/' directory, make it? y/n"
	read RESPONSE
		if [ "$(echo $RESPONSE | tr '[:upper:]' '[:lower:]')" = "n" ];then # Does user want the script to make the directory
			exit # Response NO = Exit
		elif [ "$(echo $RESPONSE | tr '[:upper:]' '[:lower:]')" = "y" ]; then # Does user want the script to make the directory
			mkdir $HOME/.flash
			touch $HOME/.flash/deck.csv
			echo "Your './flash' directory has been made and your 'deck.csv' file is ready for your flashcard data"
			exit
		else
			echo "invalid choice, please select either 'y' or 'n'"
			exit
		fi
fi
if [ ! -e $HOME/.flash/deck.csv ];then # If the Deck file does NOT exist in .flash/
	echo "No 'deck.csv' in '.flash/', make it? y/n"
	read RESPONSE
		if [ "$(echo $RESPONSE | tr '[:upper:]' '[:lower:]')" = "n" ];then # Does user want the script to make the deck.csv file
			exit # Response NO = Exit
		elif [ "$(echo $RESPONSE | tr '[:upper:]' '[:lower:]')" = "y" ]; then # Does user want the script to make the deck.csv file
			touch $HOME/.flash/deck.csv
			echo "Your 'deck.csv' file has been made go fill it with flashcard data!"
			exit
		else
			echo "invalid choice, please select either 'y' or 'n'"
			exit
		fi
fi

# Configuration
FILE="$HOME/.flash/deck.csv"

main(){
	IFS=$'\t'; read -a q <<<$(shuf -n 1 "$FILE")
	echo "===================================================="
	echo "Category: ${q[0]}"
	echo "Question: ${q[1]}"
	read _
	echo "Answer: ${q[2]}"
	echo ''
}

while true; do
	main
done