{ pkgs, ... }:

let

  notif = pkgs.writeShellScriptBin "notif" ''
    # Shell script to send custom notifications
    NOTIF_FOLDER="/tmp/notif"
    sender_id=$1 # To overwrite existing notifications
    message=$2
    extraargs=""
    description=""
    if [[ $3 == "extraargs="* ]]; then
      extraargs=$(echo "$3" | sed 's/extraargs=//g')
    else
      description="$3"
      extraargs="$4"
    fi

    [[ -d "$NOTIF_FOLDER" ]] || mkdir $NOTIF_FOLDER
    [[ -f "$NOTIF_FOLDER/$sender_id" ]] || echo "0" > "$NOTIF_FOLDER/$sender_id"

    old_notification_id=$(cat "$NOTIF_FOLDER/$sender_id")

     ${pkgs.libnotify}/bin/notify-send "$message" \
     $extraargs \
    --replace-id="$old_notification_id" --print-id > "$NOTIF_FOLDER/$sender_id"
  '';

  battery-watch = pkgs.writeShellScriptBin "battery-watch" ''
    while true;do
      battery-plugged &
      battery-level &
      sleep 60
    done
  '';

  battery-plugged = pkgs.writeShellScriptBin "battery-plugged" ''
    BATTERY_STATUS=$(cat /sys/class/power_supply/BAT*/status | head -n1)
    OLD_BATTERY_STATUS=$(cat /tmp/old_battery_status 2>/dev/null || echo "Unknown")
    if [[ $BATTERY_STATUS != $OLD_BATTERY_STATUS && $OLD_BATTERY_STATUS != "Unknown" ]]; then
      if [[ $BATTERY_STATUS == "Discharging" ]]; then
        notif "battery" "󰚦 Battery is unplugged"
      else
        notif "battery" "󰚥 Battery is plugged in"
      fi
    fi
    echo $BATTERY_STATUS > /tmp/old_battery_status
  '';

  battery-level = pkgs.writeShellScriptBin "battery-level" ''
    BATTERY_LEVEL=$(cat /sys/class/power_supply/BAT*/capacity | head -n1)
    BATTERY_STATUS=$(cat /sys/class/power_supply/BAT*/status | head -n1)
    if [[ $BATTERY_LEVEL -le 20 ]] && [[ $BATTERY_STATUS == "Discharging" ]]; then
      notif "battery" "󰁻  Low battery" "Battery level is $BATTERY_LEVEL%"
    elif [[ $BATTERY_LEVEL -le 10 ]] && [[ $BATTERY_STATUS == "Discharging" ]]; then
      notif "battery" "󰁺  Very low battery" "Battery level is $BATTERY_LEVEL%"
    elif [[ $BATTERY_LEVEL -eq 100 ]] && [[ $BATTERY_STATUS -ne "Discharging" ]]; then
      notif "battery" "󰁹 Fully charged"
    fi
  '';

in { home.packages = [ notif battery-watch battery-plugged battery-level ]; }