#!/bin/bash
###### configuration #####

# stations to display
STATION_ID[0]="18"
STATION_ID[1]="202"

LOGO_L[ 0]="\\t\\t████████████████████████████████████████████████"
LOGO_L[ 1]="\\t\\t██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██"
LOGO_L[ 2]="\\t\\t██▒▒████████████████████████████████████████▒▒██"
LOGO_L[ 3]="\\t\\t██▒▒██████████▒▒██▒▒████████████▒▒██▒▒██████▒▒██"
LOGO_L[ 4]="\\t\\t██▒▒████▒▒▒▒▒▒████▒▒██████▒▒▒▒▒▒████▒▒██████▒▒██"
LOGO_L[ 5]="\\t\\t██▒▒████▒▒████████████▒▒██▒▒████████████▒▒██▒▒██"
LOGO_L[ 6]="\\t\\t██▒▒████▒▒████████▒▒██▒▒██▒▒████████▒▒██▒▒██▒▒██"
LOGO_L[ 7]="\\t\\t██▒▒██████████▒▒██▒▒██▒▒████████▒▒██▒▒██▒▒██▒▒██"
LOGO_L[ 8]="\\t\\t██▒▒██▒▒▒▒▒▒▒▒██▒▒██▒▒██▒▒▒▒▒▒▒▒██▒▒██▒▒████▒▒██"
LOGO_L[ 9]="\\t\\t██▒▒████████████████████████████████████████▒▒██"
LOGO_L[10]="\\t\\t██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██"
LOGO_L[11]="\\t\\t████████████████████████████████████████████████"
LOGO_L[12]="\\t\\t""\e[1m"" C  H  A  O  S  C  H  E  M  N  I  T  Z  .  D  E ""\e[0m""\\n"

LOGO_S[0]="\\t\\t█▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█      "
LOGO_S[1]="\\t\\t█ █████▀█▀██████▀█▀███ █      "
LOGO_S[2]="\\t\\t█ ██ ▄▄██▄█▀█ ▄▄██▄█▀█ █      "
LOGO_S[3]="\\t\\t█ ██▄██▀█ █ █▄██▀█ █ █ █      "
LOGO_S[4]="\\t\\t█ █▄▄▄▄█▄█▄█▄▄▄▄█▄█▄██ █      "
LOGO_S[5]="\\t\\t█▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄█      "

PROPAGANDA="
\t\t┌──────────────────────────────────────────────────────────┐
\t\t│""\e[7m"" Der Chaostreff Chemnitz (ChCh) ist ein lockeres Treffen  ""\e[27m""│
\t\t│""\e[7m"" von technikbegeisterten und kreativen Menschen. Als      ""\e[27m""│
\t\t│""\e[7m"" Chaostreff fühlen wir uns dem Chaos Computer Club (CCC)  ""\e[27m""│
\t\t│""\e[7m"" nahe.                                                    ""\e[27m""│
\t\t│""\e[7m""                                                          ""\e[27m""│
\t\t│""\e[7m"" Besucht uns online oder Montags im zweiten Stock.        ""\e[27m""│
\t\t└──────────────────────────────────────────────────────────┘
\t\t""\e[1m""       C  H  A  O  S  C  H  E  M  N  I  T  Z  .  D  E       ""\e[0m"


##########################

if [ -z "$(which jq)" ]; then
	printf "\\n\\n\\n\\tPackage \"jq\" required!"
	exit 1
fi

trap do_exit INT

do_exit() {
	tput cvvis # unhide cursor
	exit 0
}

# hide cursor
tput civis
# ohne dieses IFS trennt BASH an Space und erstellt damit zu viele Array-Felder
IFS="
"

append_five_line_symbol()
{
	local -n LINES=$1
	case $2 in
		"0")
			LINES[0]+=" █████"
			LINES[1]+=" █   █"
			LINES[2]+=" █   █"
			LINES[3]+=" █   █"
			LINES[4]+=" █   █"
			LINES[5]+=" █████"
			;;
		"1")
			LINES[0]+="     █"
			LINES[1]+="     █"
			LINES[2]+="     █"
			LINES[3]+="     █"
			LINES[4]+="     █"
			LINES[5]+="     █"
			;;
		"2")
			LINES[0]+=" █████"
			LINES[1]+="     █"
			LINES[2]+=" ▄▄▄▄█"
			LINES[3]+=" █▀▀▀▀"
			LINES[4]+=" █    "
			LINES[5]+=" █████"
			;;
		"3")
			LINES[0]+=" █████"
			LINES[1]+="     █"
			LINES[2]+=" ▄▄▄▄█"
			LINES[3]+=" ▀▀▀▀█"
			LINES[4]+="     █"
			LINES[5]+=" █████"
			;;
		"4")
			LINES[0]+=" █   █"
			LINES[1]+=" █   █"
			LINES[2]+=" █▄▄▄█"
			LINES[3]+=" ▀▀▀▀█"
			LINES[4]+="     █"
			LINES[5]+="     █"
			;;
		"5")
			LINES[0]+=" █████"
			LINES[1]+=" █    "
			LINES[2]+=" █▄▄▄▄"
			LINES[3]+=" ▀▀▀▀█"
			LINES[4]+="     █"
			LINES[5]+=" █████"
			;;
		"6")
			LINES[0]+=" █████"
			LINES[1]+=" █    "
			LINES[2]+=" █▄▄▄▄"
			LINES[3]+=" █▀▀▀█"
			LINES[4]+=" █   █"
			LINES[5]+=" █████"
			;;
		"7")
			LINES[0]+=" █████"
			LINES[1]+="     █"
			LINES[2]+="     █"
			LINES[3]+="     █"
			LINES[4]+="     █"
			LINES[5]+="     █"
			;;
		"8")
			LINES[0]+=" █████"
			LINES[1]+=" █   █"
			LINES[2]+=" █▄▄▄█"
			LINES[3]+=" █▀▀▀█"
			LINES[4]+=" █   █"
			LINES[5]+=" █████"
			;;
		"9")
			LINES[0]+=" █████"
			LINES[1]+=" █   █"
			LINES[2]+=" █▄▄▄█"
			LINES[3]+=" ▀▀▀▀█"
			LINES[4]+="     █"
			LINES[5]+=" █████"
			;;
		":")
			LINES[0]+="      "
			LINES[1]+="  ███ "
			LINES[2]+="  ▀▀▀ "
			LINES[3]+="  ▄▄▄ "
			LINES[4]+="  ███ "
			LINES[5]+="      "
			;;
		*)
	esac
}

get_cvag_station_name()
{
	local -n _STATION_NAME=$1
	local -n _STATION_ID=$2

	COMPLETE_STATION_LIST="$(curl --connect-timeout 5 -s "http://www.cvag.de/eza/mis/stations?minLat=0&maxLat=100&minLon=0&maxLon=100")"
	[ -z "$(echo $COMPLETE_STATION_LIST | grep -oe "^{.*}$")" ] && return 1
	for ((i=0; i<${#_STATION_ID[*]}; i++)); 	do
		case ${_STATION_ID[$i]} in
			""|*[!0-9]*)
				_STATION_NAME[$i]=$(echo -n "$COMPLETE_STATION_LIST" | jq -r ".stations | .[] | select(.displayName | contains(${_STATION_ID[$i]})) | .number")
				;;

			*)
				_STATION_NAME[$i]=$(echo -n "$COMPLETE_STATION_LIST" | jq -r ".stations | .[] | select(.number | contains(${_STATION_ID[$i]})) | .displayName")
				;;
		esac
	done
}

SYSTEM_TIME_DELTA=0
STATION_SCHEDULE=()
get_cvag_station_info()
{
	local -n _STATION_STOPS=$2
	local -n _STATION_NOW=$3
	local -n _STATION_DESTINATIONS=$4
	local -n _STATION_LINES=$5
	local -n _STATION_ACTUAL_DEPARTURE=$6
	local -n _THISDATE=$7
	_ERROR=0

	THIS_STATION_SCHEDULE="$(curl --connect-timeout 5 -s "http://www.cvag.de/eza/mis/stops/station/CAG-${STATION_ID[$1]}")"
	[ ! -z "$(echo "$THIS_STATION_SCHEDULE" | grep -oe "^{.*}$")" ] && STATION_SCHEDULE[$1]=$THIS_STATION_SCHEDULE || _ERROR=1	# return data from cache
	[ -z "$STATION_SCHEDULE[$1]" ] && _ERROR=2											# no data cached yet

	_STATION_STOPS=$(echo "${STATION_SCHEDULE[$1]}" | jq -r ".stops | .[]")
	_STATION_NOW=$(echo "${STATION_SCHEDULE[$1]}" | jq -r ".now")
	_STATION_DESTINATIONS=($(echo -n "$_STATION_STOPS" | jq -r ".destination"))
	_STATION_LINES=($(echo -n "$_STATION_STOPS" | jq -r ".line"))
	_STATION_ACTUAL_DEPARTURE=($(echo -n "$_STATION_STOPS" | jq -r ".actualDeparture"))
	[ ${#_STATION_NOW} -lt 1 ] && _STATION_NOW="0"
	_REALSTATION_NOW=$(( "$_STATION_NOW" / 1000))
	[ $_ERROR -eq 0 ] && SYSTEM_TIME_DELTA=$(($_REALSTATION_NOW-$(date +%s))) || _STATION_NOW=$((($(date +%s)+$SYSTEM_TIME_DELTA)*1000))
	_THISDATE="$(date --date="@$_REALSTATION_NOW" +"%d.%m.%Y %T")"

	return $_ERROR
}

draw_logo_time()
{
	local -n _MYOUTPUT=$1
	local TIME=$2
	LOGO_TIME=("${LOGO_S[@]}")

	for((k=1; k<6; k++)); do
		append_five_line_symbol LOGO_TIME "$(date --date="@$TIME" +"%H:%M" | cut -b"$k")"
	done
	_MYOUTPUT="\\n\\n${LOGO_TIME[0]}\\n${LOGO_TIME[1]}\\n${LOGO_TIME[2]}\\n${LOGO_TIME[3]}\\n${LOGO_TIME[4]}\\n${LOGO_TIME[5]}"
}

draw_large_logo()
{
	clear
	echo -e "\n\n\n\n\n"
	for ((j=0; j<="${#LOGO_L[*]}"; j++)); do
		echo -e "${LOGO_L[$j]}"
	done
}

print_chch_propaganda()
{
	clear
	draw_logo_time LOGO_AND_TIME $(($(date +%s)+$SYSTEM_TIME_DELTA))
	echo -e "$LOGO_AND_TIME"
	echo -e "$PROPAGANDA"
	sleep 10
}

LOGO_LINES_POSITION=0
STATION_NAME=()
print_cvag_schedule()
{
	[ ${#STATION_NAME[*]} -eq 0 ] && get_cvag_station_name STATION_NAME STATION_ID
	if [ ${#STATION_NAME[*]} -eq 0 ]; then
		clear
		echo -e "\\n\\n\\n\\tService unavailable!"
	else
		MYOUTPUT=()
		MYOUTPUT[0]="\\n "

		for ((j=0; j<="${#STATION_ID[*]}"; j++)); do
			if [ ! "$j" -eq "$LOGO_LINES_POSITION" ]; then
				[ "$j" -gt "$LOGO_LINES_POSITION" ] && THIS_STATION_ID=$(($j-1)) || THIS_STATION_ID=$j

				get_cvag_station_info $THIS_STATION_ID STATION_STOPS STATION_NOW STATION_DESTINATIONS STATION_LINES STATION_ACTUAL_DEPARTURE THISDATE
				STATION_INFO_ERR=$?
				if [ ! $STATION_INFO_ERR -eq 2 ]; then		# FIXME: add warning, when STATION_INFO_ERR == 1
					CACHE_WARN="   "; [ $STATION_INFO_ERR -eq 1 ] && CACHE_WARN="/""\e[5m""!""\e[25m""\\"
					MYOUTPUT[$j]="${MYOUTPUT[$j]}\n\n\
\t\t┌─────────────────────────┬────────────────────────────────┐ \n\
\t\t│ ${STATION_NAME[$THIS_STATION_ID]}$(printf "%-$((24-${#STATION_NAME[$THIS_STATION_ID]}))s" "")│ Stand: $THISDATE $CACHE_WARN │\n\
\t\t├─────────────┬─────┬─────┴────────────────────────────────┤\n"
					for ((i=0; i<"${#STATION_LINES[*]}"; i++)); do
						MILLIS=$((${STATION_ACTUAL_DEPARTURE[$i]} - STATION_NOW)); [ "$MILLIS" -lt 0 ] && MILLIS=0
						SEKS=$((MILLIS / 1000)); MINS=$((SEKS / 60)); SEKS=$((SEKS % 60))
						MYOUTPUT[$j]="${MYOUTPUT[$j]}\
\t\t│$(printf "%-$((3-${#MINS}))s" "")$MINS min $(printf "%-$((2-${#SEKS}))s" "")$SEKS s │ $(printf "%-$((3-${#STATION_LINES[$i]}))s" "")${STATION_LINES[$i]} │ ${STATION_DESTINATIONS[$i]}$(printf "%-$((36-${#STATION_DESTINATIONS[$i]}))s" "") │\\n"
					done
					MYOUTPUT[$j]="${MYOUTPUT[$j]}\
\t\t└─────────────┴─────┴──────────────────────────────────────┘"
				fi
			fi
		done
		draw_logo_time LOGO_AND_TIME $(($(date +%s)+$SYSTEM_TIME_DELTA))
		MYOUTPUT[$LOGO_LINES_POSITION]="$LOGO_AND_TIME"
		LOGO_LINES_POSITION=$(((LOGO_LINES_POSITION + 1) % (${#STATION_ID[*]} + 1)))

		clear
		for ((j=0; j<="${#STATION_ID[*]}"; j++)); do
			echo -e "${MYOUTPUT[$j]}"
		done
	fi
}

update_and_restart()
{
	cd "$(dirname "$0")"
	[ -d ".git" ] && git pull >/dev/null || sleep 10
	exec ./$(basename -- "$0") "skip_initial_update"
}

draw_large_logo
SKIP_UPDATE="$1"
[ "$SKIP_UPDATE" = "skip_initial_update" ] && sleep 10
ROUND_COUNT=0
while true; do
	[ $ROUND_COUNT -eq 0 -a ! "$SKIP_UPDATE" = "skip_initial_update" ] && update_and_restart
	SKIP_UPDATE=""
	if [ $(($ROUND_COUNT % 20)) -eq 0 ]; then
		print_chch_propaganda
	else
		print_cvag_schedule
	fi
	ROUND_COUNT=$((($ROUND_COUNT + 1) % 60))
	sleep 10
done

exit 1