sunshine

#!/bin/bash

# Making a shell program for switching themes
CURR_DIR="$(pwd)"
CONF_DIR="$HOME/.config"
SUNSHINE_CONF_DIR="$CONF_DIR/sunshine"

sourceConfig () {
    if [ -f "$SUNSHINE_CONF_DIR/sunshine.conf" ]; then
        source "$SUNSHINE_CONF_DIR/sunshine.conf"
    else
        echo "Config File Not Found using 6:00 and 18:00 as Default"
    fi
}

setLightsOn () {
    if [[ ! -n "$LIGHTS_ON" ]] || [[ $LIGHTS_ON != $(date --date="$LIGHTS_ON" +%H:%M) ]]; then
        echo "Invalid Date or Date not Provided for LIGHTS_ON !!!"
        LIGHTS_ON="06:00"
    fi
    echo "Making Light Mode Turn On at $LIGHTS_ON"
}

setLightsOff () {
    if [[ ! -n "$LIGHTS_OFF" ]] || [[ $LIGHTS_OFF != $(date --date="$LIGHTS_OFF" +%H:%M) ]]; then
        echo "Invalid Date or Date not Provided for LIGHTS_OFF !!!"
        LIGHTS_OFF="18:00"
    fi
    echo "Making Light Mode Turn Off at $LIGHTS_OFF"
}

send_notification () {
    if command -v "notify-send" &> /dev/null; then
        local ICON;
        if [[ -f "$HOME/.local/share/icons/sun-with-face.svg" ]]; then
            ICON="$HOME/.local/share/icons/sun-with-face.svg"
        elif [[ -f "$CURR_DIR/sun-with-face.svg" ]]; then
            ICON="$CURR_DIR/sun-with-face.svg"
        else
            ICON=""
        fi

        notify-send -i "$ICON" "Sunshine" "$*"
    fi
}

if [[ $1 == "init" ]]; then
    if [ ! -f "$CONF_DIR/systemd/user/" ]; then
        mkdir -p "$CONF_DIR/systemd/user/" 
    fi
    
    # Making Systemd Service
    SERVICE=$CONF_DIR/systemd/user/sunshine.service
    if [ -f "$SERVICE" ]; then
        systemctl --user disable sunshine.service
        rm "$SERVICE" 
    fi
    echo "Making Sunshine Service File"
    printf "[Unit]\nDescription=Sunshine: Schedules Light/Dark Mode" > $SERVICE
    printf "\n\n[Service]\nType=Simple\nExecStart=%%h/.local/bin/sunshine service" >> $SERVICE 
    printf "\n\n[Install]\nWantedBy=default.target" >> $SERVICE 
    echo "Enabling and Starting Sunshine Service File"
    systemctl --user enable sunshine.service
    systemctl --user start sunshine.service
    
    # Making Systemd Timer
    ## Reading Config File for Times
    sourceConfig

    ## Making sure that Times are Correct
    setLightsOn
    setLightsOff

    TIMER=$CONF_DIR/systemd/user/sunshine.timer
    if [ -f "$TIMER" ]; then
        systemctl --user disable sunshine.timer
        rm "$TIMER" 
    fi
    echo "Making Sunshine Timer File"
    printf "[Unit]\nDescription=Sunshine: Schedules Light/Dark Mode" > $TIMER
    printf "\n\n[Timer]\nOnCalendar=*-*-* $LIGHTS_ON:00\nOnCalendar=*-*-* $LIGHTS_OFF:00" >> $TIMER
    printf "\nPersistent=true\nUnit=sunshine.service" >> $TIMER
    printf "\n\n[Install]\nWantedBy=timers.target" >> $TIMER
    echo "Enabling and Starting Sunshine Timer File"
    systemctl --user enable sunshine.timer
    systemctl --user start sunshine.timer

    #Run for the First Time
    sunshine service

elif [[ $1 == "service" ]]; then
    ## Reading Config File for Times
    sourceConfig

    ## Making sure that Times are Correct
    setLightsOn
    setLightsOff

    HOUR=$(date "+%H")
    MIN=$(date "+%M")
    LIGHTS_ON_H=$(date --date="$LIGHTS_ON" +%H)
    LIGHTS_ON_M=$(date --date="$LIGHTS_ON" +%M)
    LIGHTS_OFF_H=$(date --date="$LIGHTS_OFF" +%H)
    LIGHTS_OFF_M=$(date --date="$LIGHTS_OFF" +%M)

    if [[ $LIGHTS_OFF_H < $LIGHTS_ON_H ]] ||
        [[ $LIGHTS_OFF_H == $LIGHTS_ON_H && $LIGHTS_OFF_M < $LIGHTS_ON_M ]]; 
    then
        LIGHTS_OFF_H=$(( $LIGHTS_OFF_H + 24 ))
    fi

    if [[ $HOUR > $LIGHTS_ON_H || ($HOUR == $LIGHTS_ON_H && $MIN -ge $LIGHTS_ON_M) ]] &&
        [[ $HOUR < $LIGHTS_OFF_H || ($HOUR == $LIGHTS_OFF_H && $MIN < $LIGHTS_OFF_M) ]];
    then
        if [ -f "$SUNSHINE_CONF_DIR/light.sh" ]; then
            echo "Sourcing light.sh"
            source "$SUNSHINE_CONF_DIR/light.sh"
            send_notification "Light Mode Activated till $LIGHTS_OFF"
        else
            echo "light.sh File Not Found In '$SUNSHINE_CONF_DIR'. Try Again!!" 
        fi
    else
        if [ -f "$SUNSHINE_CONF_DIR/dark.sh" ]; then
            echo "Sourcing dark.sh"
            source "$SUNSHINE_CONF_DIR/dark.sh"
            send_notification "Dark Mode Activated till $LIGHTS_ON"
        else
            echo "dark.sh File Not Found In '$SUNSHINE_CONF_DIR'. Try Again!!" 
        fi
    fi 
else
    echo -e "Usage \n   sunshine init #For Initializing Sunshine"
    echo -e "   sunshine service #For Changing Themes based on Time"
fi