#!/bin/bash
# nntd - Simple todo  app for Nextcloud Notes
# CC by-nc-nd psic4t 2019

# check jq
[ $(command -v jq) ] || { echo "jq not found. exiting..." && exit 1; }

# check config
if [ -r ~/.config/$(basename "$0").conf ]; then
	. ~/.config/$(basename "$0").conf
else 
	echo -e "Config not found.\nGenerating a new TODO note and ~/.config/$(basename "$0").conf."
	#echo -e "Config not found.\nGenerating an empty one - please edit ~/.config/$(basename "$0").conf."
        CONFIG_SKEL="LOGIN=username\nPASSWORD=secret\nHOSTNAME=myhost.tld\nAPPPATH=\"/apps/notes/api/v0.2/notes\""
        echo -e "$CONFIG_SKEL" > ~/.config/$(basename "$0").conf
	STRING="{\"content\": \"# TODO\n\"}"
	RESULT=$(curl -s -H "Content-Type: application/json" -XPOST -d "$STRING" "https://$LOGIN:$PASSWORD@$HOSTNAME$APPPATH")
	if [ "$(echo $RESULT | jq '.error')" = false ]; then
		echo -e "\nNew TODO note created."
		echo "TODO_NOTEID=$(echo $RESULT | jq '.id')" >> ~/.config/$(basename "$0").conf
	else
		echo "An error occurred."
	fi
	exit 1
fi

# color map
BLACK='\033[0;30m'
RED='\033[0;31m'
GREEN='\033[0;32m'
BROWN='\033[0;33m'
BLUE='\033[0;34m'
PURPLE='\033[0;35m'
CYAN='\033[0;36m'
LIGHT_GREY='\033[0;37m'
DARK_GREY='\033[1;30m'
LIGHT_RED='\033[1;31m'
LIGHT_GREEN='\033[1;32m'
YELLOW='\033[1;33m'
LIGHT_BLUE='\033[1;34m'
LIGHT_PURPLE='\033[1;35m'
LIGHT_CYAN='\033[1;36m'
WHITE='\033[1;37m'
DEFAULT='\033[0m'

todo_get_file() {
	TODO_DATA=$(curl --connect-timeout 5 -s "https://$LOGIN:$PASSWORD@$HOSTNAME$APPPATH/$TODO_NOTEID" | jq -r '.content')
	readarray -t TODO_ARRAY <<< $(echo "$TODO_DATA")
}

todo_sort() {
	# set LC_ALL on C so sort works :P
	readarray -td '' TODO_ARRAY < <(printf '%s\0' "${TODO_ARRAY[@]}" | LC_ALL=C sort -fz)
}


todo_colorize() {
	case "$1" in
		\(A\)*)
			echo -e "$LIGHT_RED$taskid $i"
			;;
		\(B\)*)
			echo -e "$YELLOW$taskid $i"
			;;
		\(C\)*)
			echo -e "$LIGHT_BLUE$taskid $i"
			;;
		\(D\)*)
			echo -e "$LIGHT_PURPLE$taskid $i"
			;;
		*)
			echo -e "$DEFAULT$taskid $i"
	esac
}

todo_show() {
	# remove note name
	TODO_ARRAY=("${TODO_ARRAY[@]:1}")

	taskid=0
	for i in "${TODO_ARRAY[@]}"; do
		case "$1" in
			active)
				if ! [[ $i =~ ^x\ * ]]; then
					((taskid++))
					todo_colorize $i
				fi
				;;
			pri)
				if [[ $i =~ ^\(${2^^}\)* ]]; then
					((taskid++))
					todo_colorize $i
				fi
				;;
			done)
				if [[ $i =~ ^x\ * ]]; then
					((taskid++))
					todo_colorize $i
				fi
				;;
		esac
	done

	echo -e "$DEFAULT--\n$taskid out of ${#TODO_ARRAY[@]} tasks"
}

todo_write() {
	TODO_ARRAY=("${TODO_ARRAY[@]:1}")
	todo_sort

	# Not easier? TODO
	for i in "${TODO_ARRAY[@]}"; do
		MERGE="$MERGE$i\n"
	done
	MERGE=${MERGE%??} # remove trailing newline
	# Put Header before uploading
	STRING="{\"content\": \"# TODO\n"$MERGE"\"}"
	#STRING="{\"content\": \""$MERGE"\"}"
	RESULT=$(curl -s -H "Content-Type: application/json" -XPUT -d "$STRING" "https://$LOGIN:$PASSWORD@$HOSTNAME$APPPATH/$TODO_NOTEID")
	#echo -e "$RESULT"
	#todo_show
	echo "TODO updated"
}

todo_add() {
	TODO_ARRAY+=("$1")
	todo_write
}

todo_pri() {
	TODO_ARRAY[$1]="(${2^^}) $(echo ${TODO_ARRAY[$1]} | sed 's/^(.*)\ //g')"
	todo_write
}

todo_depri() {
	TODO_ARRAY[$1]=$(echo ${TODO_ARRAY[$1]} | sed 's/^(.*)\ //g')
	todo_write
}

todo_do() {
	TODO_ARRAY[$1]="x $(echo ${TODO_ARRAY[$1]} | sed 's/^x\ //g')"
	todo_write
}

todo_del() {
	read -p "Delete TODO \"${TODO_ARRAY[$1]}\"? " -n 1 -r
	echo
        if [[ $REPLY =~ ^[Yyj]$ ]]; then
		unset 'TODO_ARRAY[$1]'
		todo_write
	fi
}

todo_purge() {
	read -p "Purge all done TODOs? " -n 1 -r
	echo
        if [[ $REPLY =~ ^[Yyj]$ ]]; then
		for i in "${!TODO_ARRAY[@]}"; do
			#[[ ${TODO_ARRAY[i]} =~ ^x\ * ]] && echo "${TODO_ARRAY[$i]}"
			[[ ${TODO_ARRAY[i]} =~ ^x\ * ]] && unset "TODO_ARRAY[$i]"
		done
		todo_write
	fi
}


case "$1" in
	a|add)
		todo_get_file
		todo_add "$2"
		;;
	del)
		todo_get_file
		todo_del "$2"
		;;
	do)
		todo_get_file
		todo_do "$2"
		;;
	p|pri)
		todo_get_file
		todo_pri "$2" "$3"
		;;
	dp|depri)
		todo_get_file
		todo_depri "$2"
		;;
	lsp|listpri)
		todo_get_file
		todo_show pri "$2"
		;;
	lsd|listdone)
		todo_get_file
		todo_show done
		;;
	purge)
		todo_get_file
		todo_purge
		;;
	"")
		todo_get_file
		todo_show active 
		;;
	help|-help|-h)
		echo -e "Usage:\n
$(basename $0) a|add \"new todo\"\t\t- Creates a new TODO.
$(basename $0) \t\t\t\t- Shows all active TODOs.
$(basename $0) p|pri <number> <a-z>\t- Prioritizes the given TODO A-Z. $(basename $0) pri 4 a prioritizes TODO 4 with priority A.
$(basename $0) depri <number>\t\t- Removes priority from TODO.
$(basename $0) lsp|listpri <priority>\t- Lists all TODOs with a given priority.
$(basename $0) do <number>\t\t- Marks TODO as done.
$(basename $0) lsd|listdone\t\t- Lists all done TODOs.
$(basename $0) purge\t\t\t- Purges all done TODOs.
$(basename $0) del <number>\t\t- Deletes a TODO. 
"
		;;
esac