#!/usr/bin/env bash

# ***This script was made by Clay Gomera (Drake)***
#  - Description: A simple wifi dmenu script
#  - Dependencies: dmenu, NetworkManager

## Main menu options
option1="  Turn on WiFi"
option2="  Turn off WiFi"
option3="󱛅  Disconnect WiFi"
option4="󱛃  Connect WiFi"
option5="󱛆  Setup captive portal"
option6="󱎘  Exit"
options="$option1\n$option2\n$option3\n$option4\n$option5\n$option6"

#####
## These variables will store specific information about the wireless interface
#####
wifi_info=$(nmcli dev | awk '/wifi/ {print $1,$3; exit}')
read -r wlan constate <<< "$wifi_info"

#####
## This function uses nmcli to turn off wifi and then sends a notification
#####
turnoff() {
    nmcli radio wifi off
    if [ $? -eq 0 ]; then
        notify-send "WiFi has been turned off"
    else
        notify-send "Failed to turn off WiFi"
    fi
}

#####
## This function uses nmcli to turn on wifi and then sends a notification
#####
turnon() {
    nmcli radio wifi on
    if [ $? -eq 0 ]; then
        notify-send "WiFi has been turned on"
    else
        notify-send "Failed to turn on WiFi"
    fi
}

#####
## This function uses nmcli and the $wlan and $constate variables to disconnect
## from the wifi network and then sends a notification
#####
disconnect() {
    if [ "$constate" = "disconnected" ]; then
        notify-send "WiFi is already disconnected"
    elif [ "$constate" = "connected" ]; then
        nmcli device disconnect "$wlan"
        if [ $? -eq 0 ]; then
            notify-send "WiFi has been disconnected"
        else
            notify-send "Failed to disconnect WiFi"
        fi
    else
        notify-send "Unknown WiFi state"
    fi
}

#####
## This function uses nmcli to first scan for available networks and then the
## $bssid variable will store the SSID of the network that the user chooses
#####
connect() {
    notify-send -t 5000 "Scanning networks..."
    nmcli dev wifi rescan
    wifinet=$(nmcli -f BSSID,SSID,BARS,SECURITY dev wifi list | sed -n '1!p' | dmenu -i -l 10 -p "  Select a Wifi Network")
    if [ -z "$wifinet" ]; then
        exit 0
    fi
    bssid=$(echo "$wifinet" | awk '{print $1}')
    ssid=$(echo "$wifinet" | awk '{print $2}')
}

#####
## This function will store the WiFi password in the $pass variable
#####
password() {
    if nmcli connection show | awk -v ssid="$ssid" '$1 == ssid {found=1} END {exit !found}'; then
        pass=""
    elif nmcli -f BSSID,SECURITY dev wifi list | grep -w "$bssid" | awk '{print $2}' | grep -q -- "--"; then
        pass=""
    else
        pass=$(dmenu -l 1 -P -p "Enter Password ")
        if [ -z "$pass" ]; then
            exit 0
        fi
    fi
}

#####
## This function will actually connect to the chosen WiFi network using the
## $bssid and $pass variables
#####
action() {
    if [ -n "$pass" ]; then
        nmcli dev wifi connect "$bssid" password "$pass"
    else
        nmcli dev wifi connect "$bssid"
    fi
    if [ $? -eq 0 ]; then
        notify-send "Connected to $ssid"
    else
        notify-send "Failed to connect to $ssid"
    fi
}

##########
## main ##
##########
cases=$(echo -e "$options" | dmenu -l 6 -i -p "  Wifi Settings")
if [ -z "$cases" ]; then
    exit 0
fi

case "$cases" in
    "$option1")
        turnon
        ;;
    "$option2")
        turnoff
        ;;
    "$option3")
        disconnect
        ;;
    "$option4")
        if connect; then
            if password; then
                action
            fi
        fi
        ;;
    "$option5")
        ${BROWSER:-xdg-open} http://networkcheck.kde.org
        ;;
    "$option6")
        exit 0
        ;;
esac