#!/bin/bash

set -eu

function cleanup()
{
    killall fbi
    taler-mdb-display -c "$CONF" -i
    exit 0
}

trap cleanup EXIT

CONF="$HOME/.config/taler.conf"

# Parse command-line options
while getopts ':c:h' OPTION; do
    case "$OPTION" in
        c)
            CONF="$OPTARG"
            ;;
        h)
            echo 'Supported options:'
            # shellcheck disable=SC2016
            echo '  -c $CONF     -- set configuration'
            ;;
        ?)
            exit_fail "Unrecognized command line option"
            ;;
    esac
done
shift $((OPTIND - 1))

taler-mdb-display -c "$CONF"

FBDEV=$(taler-config -c "$CONF" -s taler-mdb -o FRAMEBUFFER_DEVICE)

DATA_HOME=$(taler-config -c "$CONF" -s paths -o DATADIR -f)

while true
do
    HOUR=$(date +%H)
    if [[ HOUR -ge 8 && HOUR -lt 22 ]]
    then
        taler-mdb-display -c "$CONF"
        for AD in $(ls "${DATA_HOME}"/ads/* | shuf)
        do
            DELAY=$(echo "$AD" | awk -F'[-.]' '{print $(NF-1)}')
            fbi -d "$FBDEV" -a -m "768x576-75" -vt 2 -nocomments -noverbose "$AD"
            sleep "$DELAY"
	    killall fbi
        done
        taler-mdb-display -c "$CONF" -i
    else
        # Night time, save power!
        sleep 600
    fi
done