#!/bin/sh

invalidopt() {
        echo "$0: invalid option $2"
        exit 127
}

displaysel() {
        for i in dmenu ls fd awk wc; do
            ! command -v $i >/dev/null 2>&1 && \
            notify-send -i \
            "${XDG_CONFIG_HOME:-$HOME/.config}/dunst/critical.png" \
            "Error" "Executable \`$i\` not found." && \
            exit 127
        done

        count="$(ls $XDG_DATA_HOME/display-conf | wc -l)"
        layout=$(fd . "$XDG_DATA_HOME/display-conf" | awk -F / '{print $NF}' | \
            dmenu -i -l $count -p "Select display configuration: ")
        if [ ! -z "$layout" ]; then
                /bin/sh -c "$XDG_DATA_HOME/display-conf/$layout"
                dwmctl -f setwp -c set
        fi
}

kbsetup() {
        xset r rate "$KB_AUTO_REPEAT_DELAY" "$KB_REPEAT_RATE"
        setxkbmap "$KB_MAP"
        setxkbmap -option caps:escape
}

powermgr() {
        case "$1" in
        lock)
                if command -v gpgconf >/dev/null 2>&1; then
                        gpgconf --kill gpg-agent
                fi
                slock
                ;;
        shutdown)
                option="$(printf "%s\n%s" "No" "Yes" | \
                    dmenu -i -p "Shutdown?")"
                [ "$option" = "Yes" ] && poweroff
                ;;
        restart)
                option="$(printf "%s\n%s" "No" "Yes" | \
                    dmenu -i -p "Reboot?")"
                [ "$option" = "Yes" ] && reboot
                ;;
        *)
                invalidopt $1
                ;;
        esac
}

setwp() {
        [ -z "$WALLPAPER_DIRECTORY" ] && \
            notify-send -i \
            "${XDG_CONFIG_HOME:-$HOME/.config}/dunst/critical.png" \
            "Error" "Variable WALLPAPER_DIRECTORY not set." && \
            exit 1
        for i in dmenu awk fd xwallpaper; do
                ! command -v $i >/dev/null 2>&1 && \
                    notify-send -i \
                    "${XDG_CONFIG_HOME:-$HOME/.config}/dunst/critical.png" \
                    "Error" "Executable \`$i\` not found." && \
                exit 127
        done

        case "$1" in
        set)
                xwallpaper --center "$CURRENT_WALLPAPER" >/dev/null 2>&1
                ;;
        select)
                wallpaper=$(fd . -t file -e png -e jpg -e jpeg \
                    -e tiff "$WALLPAPER_DIRECTORY" | \
                    awk -F '/' '{print $(NF-1)"/"$NF}' | \
                    dmenu -i -l 30 -p "Choose wallpaper: ")
                ;;
        esac

        [ ! -f "$WALLPAPER_DIRECTORY/$wallpaper" ] && exit 127
        [ ! -f "$DWM_SETTINGS" ] && touch "$DWM_SETTINGS"

        if grep -q "CURRENT_WALLPAPER=" "$DWM_SETTINGS"; then
                sed -i \
                    's|^export CURRENT_WALLPAPER=.*|export CURRENT_WALLPAPER='"$WALLPAPER_DIRECTORY"'/'"$wallpaper"'|' \
                    $DWM_SETTINGS
        else
                echo "export CURRENT_WALLPAPER=$WALLPAPER_DIRECTORY/$wallpaper" >> \
                    $DWM_SETTINGS
        fi

        export CURRENT_WALLPAPER=$WALLPAPER_DIRECTORY/$wallpaper
        dwmctl -f setwp -c set
}

backlightctl() {
        case $1 in
                up)
                        xbacklight +5
                        ;;
                down)
                        xbacklight -5
                        ;;
                *)
                        invalidopt $1
                        ;;
        esac
}

volumectl() {
        case $1 in
                up)
                        amixer -M sset Master 1%+
                        ;;
                down)
                        amixer -M sset Master 1%-
                        ;;
                toggle)
                        amixer set Master toggle
                        ;;
                *)
                        invalidopt $1
                        ;;
        esac

        echo "mb-volume" > "$MODBAR_PIPE_PATH"
}

while getopts f:c: option; do
        case $option in
                f)
                        function=${OPTARG}
                        ;;
                c)
                        command=${OPTARG}
                        ;;
        esac
done

$function $command