#!/bin/sh

# symbola
#export ICON_RCD=🎥
#export ICON_MSC=♬
#export ICON_MTD=🔉
#export ICON_VOL=🔊
#export ICON_NIC=🖧
#export ICON_WFI=📡
#export ICON_MEM=📈
#export ICON_TMP=🌡
#export ICON_PLG=🔌
#export ICON_BAT=🔋
#export ICON_DAT=⏲

# nerdfont
export ICON_RCD='辶'
export ICON_MSC=''
export ICON_MTD='ﱝ '
export ICON_VOL=' '
export ICON_NIC=' '
export ICON_WFI=' '
export ICON_MEM=' '
export ICON_TMP=''
export ICON_PLG=' '
export ICON_BA0=' '
export ICON_BA1=' '
export ICON_BA2=' '
export ICON_BA3=' '
export ICON_BA4=' '
export ICON_DAT=' '

MPD=$(which mpc && echo yes)

statusbar() {

    echo -n " "

    # recording
    [ -f /tmp/recording.pid ] && echo -n "$ICON_RCD  "

    # mpd
    [ -n "$MPD" ] && mpc | awk '
        NR == 1 {
            SONG = $0
        }
        NR == 2 {
            PLAYING = $1
        }
        END {
            if (PLAYING == "[playing]")
                printf "%s %s  ", ENVIRON["ICON_MSC"], SONG
        }
    '

    # volume
    amixer get Master | awk 'END {
        ICO = $NF == "[off]" ? ENVIRON["ICON_MTD"] : ENVIRON["ICON_VOL"]
        match($0, / \[([0-9]+%)\] /, m)
        VOL = m[1]
        printf "%s %s  ", ICO, VOL
    }'

    # network
    for NIC in /sys/class/net/e*; do
        grep -q 'up' $NIC/operstate && awk '{
            printf "%s %s  ",ENVIRON["ICON_NIC"],($0 >= 1000 ? $0 / 1000 "G" : $0 "M")
        }' $NIC/speed
    done

    # wifi
    awk 'NR > 2 {
        printf "%s %i%%  ", ENVIRON["ICON_WFI"], $3*100/70
    }' /proc/net/wireless

    # cpu temperature
    awk '{
        printf "%s %i°C  ", ENVIRON["ICON_TMP"], $0/1000
    }' /sys/class/thermal/thermal_zone0/temp

    # memory usage
    free | awk 'NR == 2 {
        printf "%s %i%%  ", ENVIRON["ICON_MEM"], $3/$2*100
    }'

    # battery
    if [ -f /sys/class/power_supply/BAT0/capacity ]; then
        grep -q '1' /sys/class/power_supply/AC/online && export PLUGGED=yes
        awk '{
            if (ENVIRON["PLUGGED"] == "yes")
                ICON=ENVIRON["ICON_PLG"]
            else if ($0 > 90)
                ICON=ENVIRON["ICON_BA4"]
            else if ($0 > 75)
                ICON=ENVIRON["ICON_BA3"]
            else if ($0 > 50)
                ICON=ENVIRON["ICON_BA2"]
            else if ($0 > 25)
                ICON=ENVIRON["ICON_BA1"]
            else
                ICON=ENVIRON["ICON_BA0"]
            printf "%s %s%%  ", ICON, $0
        }' /sys/class/power_supply/BAT0/capacity
    fi

    # datetime
    echo -n "$ICON_DAT $(date +'%m-%d %H:%M %a') "
}


start() {
    while :; do
        ! pgrep slock 1>/dev/null && xsetroot -name "$(statusbar)"
        sleep 1
    done
}

restart() {
    FP=$(readlink -f $0)
    pkill -f "$FP loop"
    $FP loop &
}

case "$1" in
    loop)
        start
        ;;
    dryrun)
        statusbar
        ;;
    *)
        restart
        ;;
esac