#!/bin/bash
#
## Get connected to a network

# 1. Checks if already online; skips if so
# 2. If no wired devices are present then reload kernel modules
# 3. If wireless devices are present, and we're still offline, then connect to WiFi

die () {
    echo "$0:" "$@" >&2
    exit 1
}

# Load settings
if [[ -f "/run/archiso/bootmnt/config/arch.conf" ]]; then
    source "/run/archiso/bootmnt/config/arch.conf" || \
        die "ERROR: ARCH_WK media may be damaged. Please reboot or try another UFD"
else
    source "/usr/local/bin/arch.conf" || \
        die "ERROR: ARCH_WK media may be damaged. Please reboot or try another UFD"
    echo -n "ERROR: Settings file on ARCH_WK media missing. Using build version for now"
    sleep 1s
    echo -n "."
    sleep 1s
    echo -n "."
    sleep 1s
    echo "."
fi

# Init
WIFI_SSID="${WIFI_SSID}"
WIFI_PASS="${WIFI_PASS}"

# Connect to network
if ! ip a | grep -Eq '(192.168|10.[0-9]+).[0-9]+.[0-9]+'; then
    # LAN
    if ! ip l | grep -Eq '[0-9]+: +en'; then
        ## Reload the tg3/broadcom driver (known fix for some Dell systems)
        echo "No wired network adapters found; reloading drivers..."
        sudo modprobe -r tg3
        sudo modprobe broadcom
        sudo modprobe tg3
        sleep 5s
    fi
    
    # WiFi
    if ip l | grep -Eq '[0-9]+: +wl'; then
        ## Skip if we're already connected (i.e. the code above worked)
        if ! ip a | grep -Eq '(192.168|10.[0-9]+).[0-9]+.[0-9]+'; then
            echo "Attempting to connect to ${WIFI_SSID}..."
            netctl start wireless
            sleep 5s
        fi
    fi
fi

# Done
exit 0