#!/bin/bash

# v1.1.0

. /usr/src/m2/framework/bash_functions.sh
#. /usr/src/m2/framework/settings.sh

# this packet is for whiptail, not present on Hetzner C7 by default
yum -y install newt

# Available options -
# No option - as everything during install
# default/main - install default configuration for single server system setup
# backup - install configuration for backup system in main/backup configuration
# fs - install configuration for FS server

#GLOBAL_OPTIONS=("GUI" "DB" "MAIN_DB" "ES" "FREESWITCH" "PCAP" "RADIUS")
GLOBAL_OPTIONS=("GUI" "DB" "MAIN_DB" "ES" "RADIUS")

remove_global_option() {
    local option="$1"
    local i=0
    for i in "${!GLOBAL_OPTIONS[@]}"; do
        if [[ ${GLOBAL_OPTIONS[i]} == "$option" ]]; then
            unset 'GLOBAL_OPTIONS[i]'
        fi
    done
}

edit_or_add_setting() {
    # parameters
    # $1 - setting
    # $2 - value

    local config="/etc/m2/system.conf"
    local setting="$1"
    local value="$2"

    if [[ $setting == "DB" ]]; then
        setting="DB_PRESENT";
    elif [[ $setting == "GUI" ]]; then
        setting="GUI_PRESENT";
    elif [[ $setting == "ES" ]]; then
        setting="ES_PRESENT";
#    elif [[ $setting == "FREESWITCH" ]]; then
#        setting="FREESWITCH_PRESENT";
    elif [[ $setting == "RADIUS" ]]; then
        setting="RADIUS_PRESENT";
#    elif [[ $setting == "PCAP" ]]; then
#        setting="pcap_enabled";
    fi

    if grep -Fq "$setting" "$config"; then
        replace_line_bash "$config" "$setting" "$setting=$value"
    else
        echo  "$setting=$value" >> $config
    fi
}

handle_pcap_interface() {

    #Select first non-loopback UP interface
    local interface=""
    interface=$(ip addr show | grep -vF 'lo:' | grep -F UP | awk -F' ' '{print $2}' | sed 's/\://g')

    if [[ -n "$interface" ]]; then
        edit_or_add_setting "pcap_listening_net_interface" "$interface"
    fi

}

ask_components() {

    local enabled_component
    local disabled_component

        #FREESWITCH "Freeswitch active on this server?" ON \
        #PCAP "Should we enable PCAP?" ON  3>&1 1>&2 2>&3)

    components=$(whiptail --title  "Components to install" --checklist --nocancel \
        "Select components to install:" 15 120 7 \
        GUI "GUI active on this server?" ON \
        ES "Should we install ElasticSearch?" ON \
        RADIUS "Radius active on this server?" ON \
        DB "Database active on this server?" ON \
        MAIN_DB "Is this main Database? (only one MAIN_DB can be selected on whole system)" ON 3>&1 1>&2 2>&3)

        report "Following components will be activated: $components" 3
        for enabled_component in $components; do
            enabled_component="${enabled_component%\"}"
            enabled_component="${enabled_component#\"}"

            edit_or_add_setting "$enabled_component" "1"
            #GLOBAL_OPTIONS=${GLOBAL_OPTIONS//$enabled_component/}
            remove_global_option "$enabled_component"

            #if [[ $enabled_component == "PCAP" ]]; then
            #    handle_pcap_interface
            #fi
        done

        for disabled_component in "${GLOBAL_OPTIONS[@]}"; do
            edit_or_add_setting "$disabled_component" "0"
        done


}

if [ ! -f /etc/m2/system.conf ]; then
    mkdir -p /etc/m2
    cp -fr /usr/src/m2/system.conf /etc/m2/system.conf

    if [[ -z $1 || $1 == "update" ]]; then
         ask_components
    elif [[ $1 == "main" || $1 == "default" ]]; then
         # default configuration (everything is enabled)
        handle_pcap_interface
    elif [[ $1 == "backup" ]]; then
        edit_or_add_setting "MAIN_DB" "0"
        edit_or_add_setting "ES_PRESENT" "0"
        handle_pcap_interface

    elif [[ $1 == "fs" ]]; then
        edit_or_add_setting "DB_PRESENT" "0"
        edit_or_add_setting "MAIN_DB" "0"
        edit_or_add_setting "GUI_PRESENT" "0"
        edit_or_add_setting "ES_PRESENT" "0"
        edit_or_add_setting "RADIUS_PRESENT" "0"
        handle_pcap_interface
    else
         report "Unrecognised option $1. Leaving /etc/m2/system.conf unchanged" 2
    fi

    report "System file created" 0 

fi