#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Wifi configuration tools

# License
# =======
#
# Copyright (C) 2016-2018 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-wifi
export TEXTDOMAINDIR="/usr/share/locale"

CONFIGURATION_FILE=$HOME/${PROJECT_NAME}.cfg
COMPLETION_FILE=$HOME/${PROJECT_NAME}-completed.txt

WIFI_INTERFACE=wlan0
wifi_interface_specified=
WIFI_TYPE='wpa2-psk'
WIFI_SSID=
WIFI_PASSPHRASE=
WIFI_HOTSPOT='no'
WIFI_CONFIG=/etc/wpa_supplicant/wpa_supplicant.conf
WIFI_NETWORKS_FILE=~/${PROJECT_NAME}-wifi.cfg
NETWORKS_INTERACTIVE=
WIFI_DISABLE=
WAIT_SEC=
WIFI_MAX_RETRIES=5

IFACE=
IFACE_SECONDARY=

source /usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-config
source /usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-wifi

function show_help {
    echo ''
    echo $"${PROJECT_NAME}-wifi -i [interface] -t [type] -s [ssid] -p [passphrase]"
    echo ''
    echo $'Wifi configuration tool'
    echo ''
    echo $'     --help                        Show help'
    echo $'  -i --interface [wlan0|wlan1...]  Device name'
    echo $'  -t --type [wpa2-psk|none|open]   Security type'
    echo $'  -s --ssid [id]                   Set SSID'
    echo $'  -p --passphrase [text]           Set passphrase'
    echo $'     --hotspot [yes|no]            Create a hotspot'
    echo $'     --networks [filename]         File containing wifi networks'
    echo $'     --createnetworks [filename]   Create file containing wifi networks'
    echo $'     --disable [yes/no]            Disable wifi'
    echo $'     --retries [number]            Maximum number of retries'
    echo ''
    exit 0
}

while [ $# -gt 1 ]
do
    key="$1"

    case $key in
        --help)
            show_help
            ;;
        -i|--if|--interface)
            shift
            WIFI_INTERFACE=${1}
            wifi_interface_specified=1
            write_config_param "WIFI_INTERFACE" "$WIFI_INTERFACE"
            ;;
        --wait|--sleep|--pause)
            shift
            WAIT_SEC=${1}
            ;;
        -t|--type)
            shift
            WIFI_TYPE=${1}
            ;;
        -s|--ssid)
            shift
            WIFI_SSID=${1}
            ;;
        --retries)
            shift
            WIFI_MAX_RETRIES=${1}
            ;;
        -p|--pass|--passphrase)
            shift
            WIFI_PASSPHRASE=${1}
            ;;
        --hotspot)
            shift
            WIFI_HOTSPOT=${1}
            ;;
        --networks)
            shift
            WIFI_NETWORKS_FILE=${1}
            ;;
        --networksinteractive)
            shift
            NETWORKS_INTERACTIVE='yes'
            WIFI_NETWORKS_FILE=${1}
            ;;
        --disable)
            shift
            WIFI_DISABLE=${1}
            if [[ $WIFI_DISABLE == $'yes' || $WIFI_DISABLE == $'y' ]]; then
                WIFI_DISABLE='yes'
            else
                WIFI_DISABLE='no'
            fi
            ;;
        *)
            # unknown option
            ;;
    esac
    shift
done

if [ ${NETWORKS_INTERACTIVE} ]; then
    create_networks_interactive
    exit 0
fi

if [ ! ${wifi_interface_specified} ]; then
    if [ ! "$WAIT_SEC" ]; then
       wpa_action "${WIFI_INTERFACE}" stop
       wpa_cli -i "${WIFI_INTERFACE}" terminate
    else
        sleep "${WAIT_SEC}"
    fi
    update_wifi_adaptors
    if [ ! $IFACE ]; then
        echo $'No wifi adaptors were found'
        exit 872356
    fi
    WIFI_INTERFACE=${IFACE}
    echo "Adaptor: $WIFI_INTERFACE"
    write_config_param "WIFI_INTERFACE" "$WIFI_INTERFACE"
fi

if [ ${WIFI_DISABLE} ]; then
    disable_wifi ${WIFI_DISABLE}
    exit 0
fi

if [[ ${WIFI_HOTSPOT} == 'no' ]]; then
    if [ -f "${WIFI_NETWORKS_FILE}" ]; then
        wifi_established=
        wifi_retry_ctr=0
        while [ ! $wifi_established ]; do
            if [ ${wifi_retry_ctr} -gt 0 ]; then
                wpa_action ${WIFI_INTERFACE} stop
                wpa_cli -i ${WIFI_INTERFACE} terminate
            fi
            networks_from_file
            # allow some time for a connection to be established
            sleep 5
            # has it worked?
            if [[ $(wifi_is_running) != "0" ]]; then
                wifi_established=1
                break
            fi
            # has the limit of retries been reached?
            wifi_retry_ctr=$((wifi_retry_ctr+1))
            if [ ${wifi_retry_ctr} -ge "${WIFI_MAX_RETRIES}" ]; then
                break
            fi
        done
        if [ $wifi_established ]; then
            wpa_cli status
            exit 0
        else
            echo $'Wifi could not be started'
            exit 4
        fi
    fi
fi

if [ ! "${WIFI_SSID}" ]; then
    echo $'No SSID given'
    exit 1
fi

if [[ ${WIFI_HOTSPOT} != 'no' ]]; then
    if ! hotspot_on; then
        exit "$?"
    fi
    exit 0
else
    hotspot_off
fi

if [[ "$WIFI_TYPE" != 'none' && "$WIFI_TYPE" != 'open' ]]; then
    if [ ! "$WIFI_PASSPHRASE" ]; then
        echo $'No wifi passphrase was given'
        exit 2
    fi
fi

if [[ ${WIFI_TYPE} == 'wpa2-psk' ]]; then
    if [ ! -d /etc/wpa_supplicant ]; then
        echo $'wpasupplicant package is not installed'
        exit 3
    fi
    wifi_wpa2_psk "$WIFI_SSID" "$WIFI_PASSPHRASE"
    exit 0
fi

if [[ "$WIFI_TYPE" == 'none' || "$WIFI_TYPE" == 'open' ]]; then
    wifi_none "$WIFI_SSID"
    exit 0
fi

exit 0