#!/bin/bash -e

#-e Causes bash script to exit if any of the installers
#return with a non-zero return value.

if [[ $EUID -ne 0 ]]; then
    echo "Please run as root user."
    exit 1
fi

SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
AIRTIMEROOT=${SCRIPT_DIR}

showhelp () {
    echo "Usage: sudo bash install [options]
    -h, --help, -?
                Display usage information
    -V, --version
                Display version information
    -v, --verbose
                More output
    -q, --quiet, --silent
                No output except errors
    -f, --force
                Turn off interactive prompts
    --distribution=DISTRIBUTION
                Linux distribution the installation is being run on
    --release=RELEASE
                Distribution release
    -d, --ignore-dependencies
                Don't install binary dependencies
    -w, --web-user=WEB_USER
                Set the apache web user. Defaults to www-data. Only change
                this setting if you've changed the default apache web user
    -r, --web-root=WEB_ROOT
                Set the web root for Airtime files
                This will copy the Airtime application files, but you will need
                to give your web user access to the given directory if it is 
                not accessible
    --web-port=WEB_PORT
                Set what port the LibreTime interface should run on.
    -I, --in-place
                Set the current Airtime directory as the web root
                Note that you will need to give your web user permission to 
                access this directory if it is not accessible
    -p, --postgres
                Create a default postgres user named 'airtime' with password
                'airtime'
    -a, --apache
                Install apache and deploy a basic configuration for Airtime
    -i, --icecast
                Install Icecast 2 and deploy a basic configuration for Airtime
    --selinux
                Run restorecon on directories and files that need tagging to
                allow the WEB_USER access
    --no-postgres
                Skips all postgres related install tasks (Useful if you configure
                postgresql as part of another script / docker builds)
    --no-rabbitmq
                Skips all rabbitmq related install tasks.
                "
    exit 0
}

showversion () {
    if [ ! -f "$SCRIPT_DIR/VERSION" ]; then
        echo "Please initialize LibreTime by running ./build.sh"
        exit 1
    fi
    version=$(cat "$SCRIPT_DIR/VERSION")
    echo "LibreTime Version ${version}"
    exit 0
}

web_user=""
web_root=""
web_port="80"
in_place="f"
postgres="f"
apache="f"
icecast="f"
ignore_dependencies="f"
selinux="f"
# Interactive
_i=1
# Verbose
_v=0
# Quiet
_q=0
upgrade="f"
dist=""
code=""
apache_bin=""
skip_postgres=0
skip_rabbitmq=0


function verbose() {
    if [[ ${_v} -eq 1 ]]; then
        echo -e "$@"
    fi
}

function loud() {
    if [[ ${_q} -eq 0 ]]; then
        echo -e "$@"
    fi
}

# Evaluate commands silently if quiet. 
# If not quiet, output command if verbose.
function loudCmd() {
    if [[ ${_q} -eq 0 ]]; then
        verbose "$@"
        eval $@
    else
        eval $@ > /dev/null
    fi
}

function checkCommandExists() {
    set +e
    command=$@
    eval hash ${command} 2>/dev/null
    commandFound=$?
    if [[ ! ${commandFound} -eq 0 ]]; then
        echo -e "Error: ${command} not found. Please ensure you have the corresponding dependency installed."
        exit
    fi
    set -e
}

# Function to determine if systemd, Upstart or System V Init is the active
# init system. All the newer supported distros use systemd out-of-the-box but 
# a sysadmin could have installed an alternative init compatibility package.
# As a result, making assumptions based on the distribution and release is 
# not a good idea. The detection works as follows:
# 1. Get the process name where PID=1 and follow any symlinks.
# 2. Look up that path in the appropriate package manager to get the name 
#    of the package that process is part of.
# See https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
has_systemd_init=false
has_upstart_init=false
has_systemv_init=false
function systemInitDetect() {
    verbose "\nDetecting init system type ..."
    # Get the path of the command where pid=1 following any symlinks
    pid_1_path=$(readlink --canonicalize -n /proc/1/exe)
    # returns '/sbin/init' (Debian Wheezy & Ubuntu Trusty)
    # returns '(/usr)?/lib/systemd/systemd' (Debian Stretch, Debian Jessie, Ubuntu Xenial, CentOS 7)
    verbose "Detected path to PID=1 process: $pid_1_path"
    # Get package of PID=1 path as it identifies the init system
    pid_1_package=$(dpkg -S $pid_1_path 2>/dev/null || 
                    rpm --qf '%{name}\n' -qf $pid_1_path 2>/dev/null)
    verbose "Detected package name for PID=1 process: $pid_1_package"
    case "${pid_1_package-$pid_1_path}" in
      *systemd*) has_systemd_init=true; verbose "Detected init system type: systemd" ;;
      *upstart*) has_upstart_init=true; verbose "Detected init system type: Upstart" ;;
      *sysvinit*) has_systemv_init=true; verbose "Detected init system type: System V" ;;
      *) echo "ERROR: Unable to detect init system using package or path of PID=1 process!" >&2
         exit 1
         ;;
    esac
    return 0
}

# Function to wrap installation of services for systemd, Upstart and System V
# depending on which one was detected by the systemInitDetect() function.
# Service file is copied from a known location and installed into the system.
# In the process, filtering is performed for the userid if appropriate.
# If required, the service is enabled; then it is started.
# Usage:
#   systemInitInstall service-name [user]
function systemInitInstall() {
    local service_name="$1"
    local user="$2"
    local source_base_path=""
    local source_path=""
    local target_path=""
    local source_config_path=""
    local target_config_path=""
    local python_source_path="${SCRIPT_DIR-$PWD}/python_apps"
    verbose "\n * Installing service $service_name ..."
    if $has_systemd_init; then
        # TODO: move .service files under python_apps/.../install/systemd
        source_path="${SCRIPT_DIR-$PWD}/installer/systemd/${service_name}.service"
        target_path="/etc/systemd/system/${service_name}.service"
        if [[ ! -e $source_path ]]; then
            echo "$0:${FUNCNAME}(): ERROR: service \"$service_name\" with source path \"$source_path\" does not exist!" >&2
            exit 1
        fi
        # Stop and disable the service if it already exists
        if [[ -e $target_path ]]; then
            verbose "Service $service_name already exists - stopping and disabling."
            loudCmd "systemctl disable ${service_name}.service"
            loudCmd "systemctl stop ${service_name}.service"
        fi
        # If no user defined, then just copy, otherwise filter
        if [[ -z $user ]]; then
            loudCmd "cp $source_path $target_path"
        else
            sed -e "s/User=.*/User=${user}/" \
                -e "s/Group=.*/Group=${user}/" $source_path > $target_path
        fi
        chmod 0644 $target_path
        chown root:root $target_path
        verbose "Service ${service_name} installed into ${target_path}"
        # Enable and start the service
        loudCmd "systemctl enable ${service_name}.service"
        verbose "Service ${service_name} enabled and started"
    elif $has_upstart_init; then
        case "$service_name" in
            airtime_analyzer)
                source_path="${python_source_path}/${service_name}/install/upstart/${service_name}.conf"
                target_path="/etc/init/${service_name}.conf"
                user=${user:-$web_user}
                ;;
            airtime-celery)
                source_path="${python_source_path}/${service_name}/install/upstart/${service_name}.conf"
                target_path="/etc/init/${service_name}.conf"
                user=""
                ;;
            airtime-liquidsoap|airtime-playout)
                source_path="${python_source_path}/pypo/install/upstart/${service_name}.conf.template"
                target_path="/etc/init/${service_name}.conf"
                user=${user:-$web_user}
                ;;
        esac
        if [[ ! -e $source_path ]]; then
            echo "$0:${FUNCNAME}(): ERROR: service \"$service_name\" with source path \"$source_path\" does not exist!" >&2
            exit 1
        fi
        # Stop the service if it already exists
        if [[ -e $target_path ]]; then
            verbose "Service $service_name already exists - stopping."
            loudCmd "service ${service_name} stop"
        fi
        # If no user defined, then just copy, otherwise filter
        if [[ -z $user ]]; then
            loudCmd "cp $source_path $target_path"
        else
            sed -e "s/WEB_USER/${user}/g" \
                -e "/^set[gu]id/{s/www-data/${user}/}" $source_path > $target_path
        fi
        chmod 0644 $target_path
        chown root:root $target_path
        verbose "Service ${service_name} installed into ${target_path}"
        loudCmd "initctl check-config $service_name"
    elif $has_systemv_init; then
        case "$service_name" in
            airtime_analyzer)
                source_path="${python_source_path}/${service_name}/install/sysvinit/${service_name}"
                target_path="/etc/init.d/${service_name}"
                user=${user:-$web_user}
                ;;
            airtime-celery)
                source_path="${python_source_path}/${service_name}/install/initd/${service_name}"
                target_path="/etc/init.d/${service_name}"
                source_config_path="${python_source_path}/${service_name}/install/conf/${service_name}"
                target_config_path="/etc/default/${service_name}"
                user=""
                ;;
            airtime-liquidsoap|airtime-playout)
                source_path="${python_source_path}/pypo/install/sysvinit/${service_name}"
                target_path="/etc/init.d/${service_name}"
                user=${user:-$web_user}
                ;;
        esac
        if [[ ! -e $source_path ]]; then
            echo "$0:${FUNCNAME}(): ERROR: service \"$service_name\" with source path \"$source_path\" does not exist!" >&2
            exit 1
        fi
        # Stop the service if it already exists
        if [[ -e $target_path ]]; then
            verbose "Service $service_name already exists - stopping."
            loudCmd "invoke-rc.d $service_name stop"
        fi
        # If no user defined, then just copy, otherwise filter
        if [[ -z $user ]]; then
            loudCmd "cp $source_path $target_path"
            [[ -n $source_config_path ]] &&
                loudCmd "cp $source_config_path $target_config_path"
        else
            sed -e "/^USERID/{s/www-data/${user}/}" \
                -e "/^GROUPID/{s/www-data/${user}/}" $source_path > $target_path
        fi
        chmod 0644 $target_path
        chown root:root $target_path
        if [[ -n $target_config_path ]]; then
            chmod 0644 $target_config_path
            chown root:root $target_config_path
        fi
        verbose "Service ${service_name} installed into ${target_path}"
        # Create symlinks for the appropriate runlevels
        loudCmd "update-rc.d $service_name defaults"
        verbose "Service ${service_name} enabled"
    fi
    return 0
}

# Function to wrap different systemd vs. Upstart init commands depending
# on which init system has been detected. Syntax is similar to systemctl.
# Usage: 
#   systemInitCommand _command_ [service-name ...]
# Where _command_ is one of: start, stop, status, reload, restart
#   enable, disable and either daemon-reload or reload-configuration.
function systemInitCommand() {
    local command=$1; shift
    case "$command" in
        start|stop|status|reload|restart)
            if $has_systemd_init; then
                loudCmd "systemctl $command $@"
            elif $has_upstart_init; then
                for svc_name in $@; do
                    loudCmd "service $svc_name $command"
                done
            elif $has_systemv_init; then
                for svc_name in $@; do
                    loudCmd "invoke-rc.d $svc_name $command"
                done
            fi
            ;;
        enable|disable)  # TODO: REMOVE
            $has_systemd_init &&
                loudCmd "systemctl $command $1.service"
            if $has_systemv_init; then
                if [[ "$command" = "enable" ]]
                then loudCmd "update-rc.d $1 defaults"
                else loudCmd "update-rc.d $1 enable"
                fi
            fi
            ;;
        daemon-reload|reload-configuration) 
            $has_systemd_init && 
                loudCmd "systemctl daemon-reload"
            $has_upstart_init && 
                loudCmd "initctl reload-configuration"
            ;;
        *) echo -e "$0:${FUNCNAME}(): ERROR: command \"$command\" is not supported!" >&2
           exit 1
           ;;
    esac
    return 0
}

while :; do
    case "$1" in
        --help)
            showhelp
            ;;
        --version)
            showversion
            ;;
        --verbose)
            _v=1
            ;;
        --quiet|--silent)
            _q=1
            ;;
        --force)
            _i=0
            ;;
        --distribution)
            if [ "$2" ]; then
                dist=$2
                shift 2
                continue
            else
                echo 'ERROR: Must specify a non-empty "--distribution DISTRIBUTION" argument.' >&2
                exit 1
            fi
            ;;
        --distribution=?*)
            dist=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --distribution=)
            echo 'ERROR: Must specify a non-empty "--distribution DISTRIBUTION" argument.' >&2
            exit 1
            ;;
        --release)
            if [ "$2" ]; then
                code=$2
                shift 2
                continue
            else
                echo 'ERROR: Must specify a non-empty "--release RELEASE" argument.' >&2
                exit 1
            fi
            ;;
        --release=?*)
            code=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --release=)
            echo 'ERROR: Must specify a non-empty "--release RELEASE" argument.' >&2
            exit 1
            ;;
        --ignore-dependencies)
            ignore_dependencies="t"
            ;;
        --apache)
            apache="t"
            ;;
        --icecast)
            icecast="t"
            ;;
        --postgres)
            postgres="t"
            ;;
        --in-place)
            in_place="t"
            ;;
        --web-user)
            if [ "$2" ]; then
                web_user=$2
                shift 2
                continue
            else
                echo 'ERROR: Must specify a non-empty "--web-user WEB_USER" argument.' >&2
                exit 1
            fi
            ;;
        --web-user=?*)
            web_user=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --web-user=)
            echo 'ERROR: Must specify a non-empty "--web-user=WEB_USER" argument.' >&2
            exit 1
            ;;
        --web-root)
            if [ "$2" ]; then
                web_root=$(readlink -f $2)
                shift 2
                continue
            else
                echo 'ERROR: Must specify a non-empty "--web-root WEB_ROOT" argument.' >&2
                exit 1
            fi
            ;;
        --web-root=?*)
            web_root=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --web-root=)
            echo 'ERROR: Must specify a non-empty "--web-root=WEB_ROOT" argument.' >&2
            exit 1
            ;;
        --web-port)
            echo 'ERROR: Please specify a port number.' >&2
            exit 1
            ;;
        --web-port=)
            echo 'ERROR: Please specify a port number.' >&2
            exit 1
            ;;
        --web-port=?*)
            web_port=${1#*=}
            ;;
        --selinux)
            selinux="t"
            ;;
        --no-postgres)
            skip_postgres=1
            ;;
        --no-rabbitmq)
            skip_rabbitmq=1
            ;;            
        --)
            shift
            break
            ;;
        -?*)
            for ((i = 1; i < ${#1}; i++)); do
                case "${1:$i:1}" in
                    h|\?)
                        showhelp
                        ;;
                    V)
                        showversion
                        ;;
                    v)
                        _v=1
                        ;;
                    q)
                        _q=1
                        ;;
                    f)
                        _i=0
                        ;;
                    d)
                        ignore_dependencies="t"
                        ;;
                    a)
                        apache="t"
                        ;;
                    i)
                        icecast="t"
                        ;;
                    p)
                        postgres="t"
                        ;;
                    I)
                        in_place="t"
                        ;;
                    w)
                        if [ "$2" ]; then
                            web_user=$2
                            continue
                        else
                            echo 'ERROR: Must specify a non-empty "-w WEB_USER" argument.' >&2
                            exit 1
                        fi
                        ;;
                    r)
                        if [ "$2" ]; then
                            web_root=$(readlink -f $2)
                            continue
                        else
                            echo 'ERROR: Must specify a non-empty "-d WEB_ROOT" argument.' >&2
                            exit 1
                        fi
                        ;;
                    *)
                        echo "$0: error - unrecognized option '${1:$i:1}'" >&2;
                        echo "Try 'install --help' for more information."
                        exit 1
                esac
            done
            ;;
        *)
            break
    esac
    shift
done

if [ -z web_root -a ! -d web_root ]; then
    echo "$web_root doesn't exist!"
    exit 1
fi
echo -e "\n.____    ._____.               ___________.__                "
echo "|    |   |__\_ |_________   ___\__    ___/|__| _____   ____  "
echo "|    |   |  || __ \_  __ \_/ __ \|    |   |  |/     \_/ __ \ "
echo "|    |___|  || \_\ \  | \/\  ___/|    |   |  |  Y Y  \  ___/ "
echo "|_______ \__||___  /__|    \___  >____|   |__|__|_|  /\___  >"
echo -e "        \/       \/            \/                  \/     \/\n"

echo -e "Detecting distribution and release ..."
if [ -e /etc/os-release ]; then
    # Access $ID, $VERSION_ID and $PRETTY_NAME
    source /etc/os-release
    echo "Detected distribution id: $ID"
    echo "Detected distribution release id: $VERSION_ID"
    echo "Detected distribution description: $PRETTY_NAME"
else
    ID=unknown
    VERSION_ID=unknown
    PRETTY_NAME="Unknown distribution and release"
    echo "WARNING: /etc/os-release configuration not found. Unable to detect distribution." >&2
    if [ -z "$dist" -o -z "$code" ]; then
        echo "ERROR: One or both of --distribution and --release options were not specified." >&2
        echo "This is an unsupported distribution and/or version!" >&2
        exit 1
    fi
fi

# Validate --distribution parameter has a sane value for this OS.
if [ -n "$dist" ]; then
    dist=${dist,,}
    verbose "Checking --distribution \"$dist\" to ensure it has a sane value."
    # If $ID detected above does not match parameter, then do some checking
    if [ "$dist" != "$ID" ]; then
        verbose "Detected distribution \"$ID\" does not match specified one of \"$dist\". Checking ..."
        case "$dist" in
            centos|rhel)   pkg_installer=/usr/bin/yum; verbose "Detected yum package installer" ;;
            debian|ubuntu) pkg_installer=/usr/bin/apt-get; verbose "Detected apt-get package installer" ;;
            *) echo "ERROR: the value \"$dist\" specified for --distribution is unsupported." >&2
               exit 1
               ;;
        esac
        if [ ! -x "$pkg_installer" ]; then
            echo "ERROR: The value \"$dist\" specified for --distribution does not appear compatible!" >&2
            exit 1
        fi
    fi
fi

# Validate the distribution and release is a supported one; set boolean flags.
is_debian_dist=false
is_debian_stretch=false
is_debian_jessie=false
is_debian_wheezy=false
is_ubuntu_dist=false
is_ubuntu_xenial=false
is_ubuntu_trusty=false
is_centos_dist=false
is_centos_7=false
# Use specified distribution and release or detected otherwise.
dist="${dist:-$ID}"
code="${code:-$VERSION_ID}"
code="${code,,}"
verbose "Validating dist-code: ${dist}-${code}"
case "${dist}-${code}" in
    ubuntu-16.04|ubuntu-xenial)
        code="xenial"
        is_ubuntu_dist=true
        is_ubuntu_xenial=true
        ;;
    ubuntu-14.04|ubuntu-trusty)
        code="trusty"
        is_ubuntu_dist=true
        is_ubuntu_trusty=true
        ;;
    debian-9|debian-stretch)
        code="stretch"
        is_debian_dist=true
        is_debian_stretch=true
        ;;
    #Fix for Raspbian 9 (stretch)
    raspbian-9|9)
	code="stretch"
	dist="debian"
	is_debian_dist=true
	is_debian_stretch=true
	;;
    #End of fix
    debian-8|debian-jessie)
        code="jessie"
        is_debian_dist=true
        is_debian_jessie=true
        ;;
    debian-7|debian-wheezy)
        code="wheezy"
        is_debian_dist=true
        is_debian_wheezy=true
        ;;
    centos-7)
        is_centos_dist=true
        is_centos_7=true
        ;;
    *)
        echo -e "ERROR: Distribution \"$PRETTY_NAME\" is not supported with \"${dist}-${code}\"!" >&2
        exit 1
        ;;
esac
verbose "Using distribution id \"$dist\", release code \"$code\""

# Detect init system type
systemInitDetect

if $is_centos_dist; then
    apache_bin="httpd"
    apache_service="httpd"
    web_user="${web_user:-apache}"
else
    apache_bin="apache2ctl"
    apache_service="apache2"
    web_user="${web_user:-www-data}"
fi

if [ "$ignore_dependencies" = "f" ]; then
    set +e
    loud "\n-----------------------------------------------------"
    loud "         * Installing External Dependencies *        "
    loud "-----------------------------------------------------"

    if [ -x /usr/bin/apt-get ]; then
        verbose "\n * Reading requirements-${dist}-${code}.apt..."
        loudCmd "apt-get update"
        package_list_file="${SCRIPT_DIR}/installer/lib/requirements-${dist}-${code}.apt"
        if [ ! -f "$package_list_file" ]; then
            echo "ERROR: package file does not exist: $package_list_file" >&2
            exit 1
        fi
        # For apt-get version 1.1 or higher, --force-yes is deprecated so use new options.
        apt_force_options="--allow-downgrades --allow-remove-essential --allow-change-held-packages"
        # Get apt-get version by returning the 2nd parameter from the 1st line of output
        apt_version=$(apt-get --version |awk 'NR == 1 { print $2 }')
        # returns: 1.4.7 (Debian Stretch)
        # returns: 0.9.7.9 (Debian Wheezy)
        # returns: 1.0.1ubuntu2 (Ubuntu Trusty)
        # returns: 1.0.9.8.4 (Debian Jessie)
        # returns: 1.2.9 (Ubuntu Xenial)
        verbose "Detected apt-get version as: $apt_version"
        apt_version_formatted=$(awk 'BEGIN {FS = "."} {printf "%03d.%03d\n", $1,$2}' <<<  $apt_version)
        [[ "$apt_version_formatted" < "001.001" ]] && apt_force_options="--force-yes"
        verbose "Using apt-get force options: $apt_force_options"
        loudCmd "DEBIAN_FRONTEND=noninteractive apt-get -y -m ${apt_force_options} install $(grep -vE '^\s*#' $package_list_file | tr '\n' ' ')"
        if [ "$in_place" = "t" ]; then
            loudCmd "DEBIAN_FRONTEND=noninteractive apt-get -y -m install git"
        fi
    else
        echo "WARNING: installing dependencies is not supported for this distribution" >&2
    fi
    set -e
else
    checkCommandExists "${apache_bin}"
    checkCommandExists "rabbitmqctl"
    checkCommandExists "psql"
    if [ "$in_place" = "t" ]; then
        checkCommandExists "git"
    fi
fi

# Check if composer exists and install if it doesn't
set +e
eval hash "composer" 2>/dev/null
commandFound=$?
set -e
if [[ ! ${commandFound} -eq 0 ]]; then
    curl -sS https://getcomposer.org/installer > get-composer.php
    php ./get-composer.php --install-dir=/usr/local/bin --filename=composer
    rm get-composer.php
    PATH="${PATH}:/usr/local/bin"
fi

# Run composer (install PHP dependencies) and create a VERSION file
loudCmd "./build.sh"
if [ -f /etc/airtime/airtime.conf ]; then
    # TODO use VERSION or some other way to check for updates and handle
    # media-monitor case on it's own
    OLD_CONF=$(grep "[media-monitor]" /etc/airtime/airtime.conf)
    
    if [ -n "${OLD_CONF}" ]; then
        upgrade="t"
    
        set +e
        verbose "Stopping airtime services..."
        systemInitCommand stop airtime_analyzer airtime-celery airtime-playout airtime-liquidsoap airtime-media-monitor
        verbose "...Done"

        verbose "Disabling obsolete services..."
        systemInitCommand disable airtime-media-monitor
        verbose "...Done"

        echo "Looks like you have an old version of Airtime. Your current /etc/airtime/airtime.conf \
will be moved to /etc/airtime/airtime.conf.tmp"
        # If we don't remove the existing python files in /usr/lib and the 
        # /etc/init.d startup scripts, services won't work properly
        if [ -d /usr/lib/airtime/ ]; then
            rm -rf /usr/lib/airtime/
        fi

        rm -f /etc/init.d/airtime*
        rm -f /etc/init/airtime*
        rm -f /etc/default/airtime-celery
        rm -f /etc/systemd/system/airtime*

        if [ "$apache" = "t" ]; then
            # If the user selects an "in-place" install or passes in a web root, 
            # we need to replace the old apache airtime.conf
            rm /etc/apache2/sites-available/airtime.conf /etc/apache2/sites-enabled/airtime.conf
        fi
        
        if [ -d /usr/share/airtime -a web_root = /usr/share/airtime ]; then
            rm -rf /usr/share/airtime
        fi
        
        mv /etc/airtime/airtime.conf /etc/airtime/airtime.conf.tmp
        set -e
    fi
fi

if [ "$apache" = "f" -a ${_i} -eq 1 ]; then
    echo -e "Install default Airtime apache configuration? (Y/n): \c"
    read IN
    if [ "$IN" = "y" -o "$IN" = "Y" ]; then
        apache="t"
    fi
fi

if [ "$in_place" = "t" ]; then
    verbose "\n * Setting current Airtime directory as web root..."
    web_root=${AIRTIMEROOT}/airtime_mvc/public
elif [ -n "$web_root" ]; then
    verbose "\n * Creating Apache web root directory..."
    cp -R ${AIRTIMEROOT}/airtime_mvc ${web_root}
    cp -R ${AIRTIMEROOT}/vendor ${web_root}
    cp ${AIRTIMEROOT}/VERSION ${web_root}
    web_root=${web_root}/airtime_mvc/public/
else
    verbose "\n * Creating default Apache web root directory /usr/share/airtime/php..."
    web_root="/usr/share/airtime/php"
    mkdir -p ${web_root}
    cp -R ${AIRTIMEROOT}/airtime_mvc ${web_root}
    cp -R ${AIRTIMEROOT}/vendor ${web_root}
    cp ${AIRTIMEROOT}/VERSION ${web_root}
    web_root=${web_root}/airtime_mvc/public/
fi
verbose "...Done"

if [ "$apache" = "t" ]; then
    loud "\n-----------------------------------------------------"
    loud "                * Configuring Apache *                "
    loud "-----------------------------------------------------"
    # Detect Apache root folder, e.g. /etc/apache2 or /etc/httpd
    eval $($apache_bin -V |awk '/HTTPD_ROOT|SERVER_CONFIG_FILE/ { print $2 }')
    apache_conf="${HTTPD_ROOT}/${SERVER_CONFIG_FILE}"
    verbose "Detected Apache root folder is: ${HTTPD_ROOT}"
    if [[ ! -e $apache_conf ]]; then
        echo -e "ERROR: Apache binary \"$apache_bin\" points to a non-existent file \"$apache_conf\""
        exit 1
    fi
    verbose "Detected Apache primary .conf file is: ${apache_conf}"
    if [[ -d ${HTTPD_ROOT}/sites-available ]]; then  # debian & ubuntu
        apache_sitedir="${HTTPD_ROOT}/sites-available/"
    elif [[ -d ${HTTPD_ROOT}/conf.d ]]; then   # centos
        apache_sitedir="${HTTPD_ROOT}/conf.d/"
    else
        echo -e "ERROR: unknown location of Apache sites-available or virtual host directory!" >&2
        exit 1
    fi
    verbose "Detected Apache sites configuration folder: ${apache_sitedir}"

    set +e
    # Parse: Server version: Apache/2.2.22 (Ubuntu) -> 2
    apache_major_version=$($apache_bin -v |awk -F'[ /.]+' 'NR == 1 { print $4 }')
    set -e

    if [[ "$apache_major_version" -ge 2 ]]; then
        airtimeconfigfile="airtime.conf"
        oldconfigfile="airtime-vhost.conf"
    else
        airtimeconfigfile="airtime"
        oldconfigfile="airtime-vhost"
    fi

    # If we're upgrading (installing over an existing Airtime install) and we've been told to
    # install apache, we should overwrite any existing configuration. If we don't do this, doing
    # an in-place installation over an old Airtime install (which installs to /usr/share by default)
    # will fail
    if [ "$upgrade" = "t" -o ! -f ${apache_sitedir}${airtimeconfigfile} ]; then
        verbose "\n * Creating Apache config for Airtime..."
        listen_port=""
        if [ "$web_port" != "80" ]; then
            listen_port="Listen ${web_port}"
        fi

        apache_template_file=${SCRIPT_DIR}/installer/apache/airtime-vhost-2.4
        if [[ "$apache_major_version" -eq 1 ]]; then
            # fall back to apache 1 config
            apache_template_file=${SCRIPT_DIR}/installer/apache/airtime-vhost
        fi
        sed \
            -e "s@WEB_PORT_LISTEN@${listen_port}@g" \
            -e "s@WEB_PORT@${web_port}@g" \
            -e "s@WEB_ROOT@${web_root}@g" \
            ${apache_template_file} > ${apache_sitedir}${airtimeconfigfile}

        # The a2ensite/a2dissite utilities are not available on CentOS
        if [[ -x /usr/sbin/a2ensite ]]; then
            loudCmd "a2dissite 000-default"
            # If Airtime was previously installed with apt, the vhost file name is different,
            # so we need to specifically disable it.
            if [ -f "/etc/apache2/sites-available/${oldconfigfile}" ]; then
                loudCmd "a2dissite airtime-vhost"
            fi
            loudCmd "a2ensite airtime"
        fi
    else
        verbose "\nApache config for Airtime already exists, skipping"
    fi
fi

if [ "$icecast" = "f" -a ${_i} -eq 1 ]; then
    echo -e "Install default Airtime Icecast configuration? (Y/n): \c"
    read IN
    if [ "$IN" = "y" -o "$IN" = "Y" ]; then
        icecast="t"
    fi
fi

if [ "$icecast" = "t" ]; then
    loud "\n-----------------------------------------------------"
    loud "               * Configuring Icecast *                "
    loud "-----------------------------------------------------"
    
    verbose "\n * Enabling Icecast 2..."
    icecast_unit_name="icecast2"
    if [ "$dist" != "centos" ]; then
        sed -i 's/ENABLE=false/ENABLE=true/g' /etc/default/icecast2
    else
        icecast_unit_name="icecast"
    fi
    # restart in case icecast was already started (like is the case on debian)
    systemInitCommand restart ${icecast_unit_name}
    verbose "...Done"
fi

loud "\n-----------------------------------------------------"
loud "          * Installing Airtime Services *            "
loud "-----------------------------------------------------"

verbose "\n * Installing necessary python services..."
loudCmd "pip install setuptools --upgrade"
verbose "...Done"

# Ubuntu Trusty and Debian Wheezy needs a workaround for python version SSL downloads
# This affects all python installs where python < 2.7.9
python_version=$(python --version 2>&1 | awk '{ print $2 }')
verbose "Detected Python version: $python_version"
# Convert version so each segment is zero padded for easy comparison
python_version_formatted=$(awk 'BEGIN {FS = "."} {printf "%03d.%03d.%03d\n", $1,$2,$3}' <<< $python_version)
if [[ "$python_version_formatted" < "002.007.009" ]]; then
    verbose "\n * Installing pyOpenSSL and ca db for SNI support..."
    loudCmd "pip install pyOpenSSL cryptography idna certifi --upgrade"
    verbose "...Done"
fi

verbose "\n * Creating /run/airtime..."
mkdir -p /run/airtime
chmod 755 /run/airtime
chown -R ${web_user}:${web_user} /run/airtime
verbose "...Done"

if [ ! -d /var/log/airtime ]; then
    loud "\n-----------------------------------------------------"
    loud "              * Installing Log Files *               "
    loud "-----------------------------------------------------"

    verbose "\n * Creating /var/log/airtime"
    loudCmd "mkdir -p /var/log/airtime"

    verbose "\n * Copying logrotate files..."
    loudCmd "cp ${AIRTIMEROOT}/airtime_mvc/build/airtime-php.logrotate /etc/logrotate.d/airtime-php"
    loudCmd "cp ${AIRTIMEROOT}/python_apps/pypo/liquidsoap/airtime-liquidsoap.logrotate /etc/logrotate.d/airtime-liquidsoap"
fi

verbose "\n * Installing API client..."
loudCmd "python ${AIRTIMEROOT}/python_apps/api_clients/setup.py install --install-scripts=/usr/bin"
verbose "...Done"

verbose "\n * Installing pypo and liquidsoap..."
loudCmd "python ${AIRTIMEROOT}/python_apps/pypo/setup.py install --install-scripts=/usr/bin --no-init-script"
loudCmd "mkdir -p /var/log/airtime/{pypo,pypo-liquidsoap} /var/tmp/airtime/pypo/{cache,files,tmp} /var/tmp/airtime/show-recorder/"
loudCmd "chown -R ${web_user}:${web_user} /var/log/airtime/{pypo,pypo-liquidsoap} /var/tmp/airtime/pypo/{cache,files,tmp} /var/tmp/airtime/show-recorder/"
systemInitInstall airtime-liquidsoap $web_user
systemInitInstall airtime-playout $web_user
verbose "...Done"

verbose "\n * Installing airtime-celery..."
loudCmd "python ${AIRTIMEROOT}/python_apps/airtime-celery/setup.py install --no-init-script"
# Create the Celery user
if $is_centos_dist; then
    loudCmd "id celery 2>/dev/null || adduser --no-create-home -c 'LibreTime Celery' -r celery || true"
else
    loudCmd "id celery 2>/dev/null || adduser --no-create-home --gecos 'LibreTime Celery' --disabled-login --firstuid 1 --lastuid 999 celery"
fi
# Add celery to the www-data group
loudCmd "usermod -G ${web_user} -a celery"
# CentOS installs celery in /usr/bin which differs from other distros. Make 
# available in /usr/local/bin as systemd requires an absolute path.
[[ ! -e /usr/local/bin/celery ]] && ln -s /usr/bin/celery /usr/local/bin/celery
systemInitInstall airtime-celery
verbose "...Done"

verbose "\n * Installing airtime_analyzer..."
loudCmd "python ${AIRTIMEROOT}/python_apps/airtime_analyzer/setup.py install --install-scripts=/usr/bin --no-init-script"
systemInitInstall airtime_analyzer $web_user
verbose "...Done"

verbose "\n * Setting permissions on /var/log/airtime..."
# Make the airtime log directory group-writable
loudCmd "chmod -R 775 /var/log/airtime"
loudCmd "chown -R ${web_user}:${web_user} /var/log/airtime/"

verbose "\n * Setting permissions on /var/tmp/airtime..."
loudCmd "chmod -R a+x /var/tmp/airtime"
loudCmd "chown -R ${web_user}:${web_user} /var/tmp/airtime/"

loud "\n-----------------------------------------------------"
loud "              * Configuring PHP in Apache *          "
loud "-----------------------------------------------------"
# Test common locations for php conf directory
php_conf_dirs=(
    "/etc/php/7.0/apache2/conf.d"   # Ubuntu Xenial
    "/etc/php5/apache2/conf.d"      # Debian Stretch, Debian Jessie, Ubuntu Trusty
    "/etc/php.d"                    # CentOS 7
)
for php_conf in ${php_conf_dirs[@]}; do
    [[ -d $php_conf ]] && break
done
if [[ -d $php_conf ]]; then
    libretime_phpini="${php_conf}/airtime.ini"
else
    echo -e "ERROR: PHP Apache configuration folder does not exist or is in an unknown location!" >&2
    exit 1
fi
verbose "Detected php conf directory at: $php_conf"
if [ ! -f "${libretime_phpini}" ]; then
    verbose "\n * Creating LibreTime PHP config for Apache..."
    cp ${SCRIPT_DIR}/installer/php/airtime.ini ${libretime_phpini}
else
    verbose "\nAirtime PHP config for Apache already exists, skipping"
fi

# Enable Apache modules
if $is_ubuntu_xenial || $is_debian_stretch; then
    loudCmd "a2enmod rewrite php7.0"
elif $is_centos_dist; then
    verbose "TODO: enable Apache modules mod_rewrite and mod_php manually"
else
    loudCmd "a2enmod rewrite php5"
fi

if [ $skip_postgres -eq 0 ]; then
    loud "\n-----------------------------------------------------"
    loud "              * Configuring PostgreSQL *              "
    loud "-----------------------------------------------------"

    # Ensure postgres is running - It isn't after you install the postgres package on Ubuntu 15.04
    systemInitCommand start postgresql

    setupAirtimePostgresUser() {
        # here-doc to execute this block as postgres user
        su postgres <<'EOF'
        set +e
        count=$(psql -d postgres -tAc "SELECT count(*) FROM pg_roles WHERE rolname='airtime';")
        if [[ $count -eq 0 ]]; then
            psql -d postgres -tAc "CREATE USER airtime WITH ENCRYPTED PASSWORD 'airtime'; ALTER USER airtime CREATEDB;"
            [[ $? -eq 0 ]] && 
                  echo "Created airtime user in PostgreSQL" || 
                  echo "$0:${FUNCNAME}(): ERROR: Can't create airtime user in PostgreSQL!"
        else
            echo "airtime user already exists in PostgreSQL"
        fi
        set -e
# don't indent this!
EOF
    }

    if [ "$postgres" = "t" ]; then
        setupAirtimePostgresUser
    elif [ ${_i} -eq 1 ]; then
        echo -e "Create default airtime postgres user? (Y/n): \c"
        read IN
        if [ "$IN" = "y" -o "$IN" = "Y" ]; then
            setupAirtimePostgresUser
        fi
    fi
fi

if [ $skip_rabbitmq -eq 0 ]; then

    loud "\n-----------------------------------------------------"
    loud "               * Configuring RabbitMQ *               "
    loud "-----------------------------------------------------"

    RABBITMQ_VHOST=/airtime
    RABBITMQ_USER=airtime
    RABBITMQ_PASSWORD=airtime
    EXCHANGES="airtime-pypo|pypo-fetch|airtime-analyzer|media-monitor"

    # Ignore errors in this check to avoid dying when vhost isn't found
    set +e
    rabbitmqctl list_vhosts | grep -w "^${RABBITMQ_VHOST}$" > /dev/null
    RESULT="$?"
    set -e

    # Only run these if the vhost doesn't exist
    if [ "$RESULT" != "0" ]; then
        verbose "\n * Creating RabbitMQ user ${RABBITMQ_USER}..."

        rabbitmqctl add_vhost ${RABBITMQ_VHOST}
        rabbitmqctl add_user ${RABBITMQ_USER} ${RABBITMQ_PASSWORD}
    else
        verbose "\nRabbitMQ user already exists, skipping creation"
    fi

    verbose "\n * Setting RabbitMQ user permissions..."
    #loudCmd "rabbitmqctl set_permissions -p ${RABBITMQ_VHOST} ${RABBITMQ_USER} \"$EXCHANGES\" \"$EXCHANGES\" \"$EXCHANGES\""
    loudCmd "rabbitmqctl set_permissions -p ${RABBITMQ_VHOST} ${RABBITMQ_USER} .\* .\* .\*"
fi

if [ ! -d "/etc/airtime" ]; then
    loud "\n-----------------------------------------------------"
    loud "                * Installing Airtime *               "
    loud "-----------------------------------------------------"

    verbose "\n * Creating /etc/airtime/ directory..."
    mkdir /etc/airtime
fi


chown -R ${web_user}:${web_user} /etc/airtime

if [ ! -d "/srv/airtime" ]; then
    mkdir -p /srv/airtime
fi
chown -R ${web_user}:${web_user} /srv/airtime


# We only generate the locales for Airtime if you're allowing us
# to install our dependencies, so that we won't automatically do this
# when this install script runs from our DEB package.
if [ "$ignore_dependencies" = "f" ]; then
    loud "\n-----------------------------------------------------"
    loud "                * Installing Locales *               "
    loud "-----------------------------------------------------"

    if $is_centos_dist; then
        loud "\n not required on $dist"
    else
        set +e
        verbose "\n * Generating locales"
        for i in `ls ${web_root}/../locale | grep ".._.."`; do
            if [ "$dist" = "debian" ]; then
                grep -qi "^$i" /etc/locale.gen
                if [ $? -ne 0 ]; then
                    verbose "$i.UTF-8 UTF-8" >> /etc/locale.gen
                fi
            else
                loudCmd "locale-gen \"$i.utf8\""
            fi
        done
        set -e
    fi

    if [ "$dist" = "debian" ]; then
        loudCmd "/usr/sbin/locale-gen"
    fi
fi

# If the user requested it we run restorecon on files that need
# tagging for selinux.
if [ "$selinux" = "t" ]; then
    loud "\n-----------------------------------------------------"
    loud "              * Restoring SELinux Tags *             "
    loud "-----------------------------------------------------"

    verbose "\n * Running restorecon..."
    loudCmd "restorecon -Rv /etc/airtime /srv/airtime > /dev/null 2>&1"
    verbose "...Done"
fi

verbose "\n * Reloading apache..."
systemInitCommand restart ${apache_service}
# NOTE: ip command works on all supported platforms
if $is_centos_dist; then
    IP=$(ip -o -4 address show dev eth0 | grep -Po 'inet \K[\d.]+')
else
    # not on centos
    ip_device="eth0"
    $is_ubuntu_xenial && ip_device="enp0s8"
    IP=$(ifconfig ${ip_device} 2>/dev/null |awk -F'[ :]+' '/inet addr:/ {print $4}')
fi
verbose "...Done"

echo -e "\n-----------------------------------------------------"
echo    "                * Basic Setup DONE! *                "
echo    "                                                     "
echo    " To get started with Airtime, visit ${IP}            "
echo    " or, if you've set up your own web configuration,    "
echo    " the Airtime webroot on your webserver               "
echo    "-----------------------------------------------------"