#!/bin/bash

state=/tmp/emacs-use-dark-mode

start_daemon () {
    emacs --fg-daemon > /dev/null 2>&1
}

stop_daemon () {
    emacsclient --eval "(kill-emacs)" 2> /dev/null
}

kill_daemon () {
    killall emacsclient 2> /dev/null
    killall emacs 2> /dev/null
}

restart_daemon () {
    stop_daemon
    start_daemon
}

hard_restart_daemon () {
    kill_daemon
    start_daemon
}

set_light () {
    echo 0 > "$state"
}

set_dark () {
    echo 1 > "$state"
}

if [[ -z "$1" ]]; then
    echo "Need a command to perform"
    exit 1
elif [[ "$1" == "start" ]]; then
    start_daemon &
elif [[ "$1" == "stop" ]]; then
    stop_daemon
elif [[ "$1" == "kill" ]]; then
    kill_daemon
elif [[ "$1" == "theme" ]]; then
    if [[ "$2" == "toggle" ]]; then
        # if no state file assume light theme
        if [[ ! -f "$state" ]]; then
            set_light
        elif [[ "$(cat $state)" == 0 ]]; then
            set_dark
        else
            set_light
        fi
    elif [[ "$2" == "light" ]]; then
        set_light
    elif [[ "$2" == "dark" ]]; then
        set_dark
    else
	echo 'Invlalid theme command'
	exit 1
    fi
    if [ "$3" == "restart" ]; then
        restart_daemon &
    elif [ "$3" == "hard_restart" ]; then
        hard_restart_daemon &
    fi
else
    echo 'Invalid command'
    exit 1
fi