#!/bin/bash
#### LOGGING
## from https://www.cubicrace.com/2016/03/log-tracing-mechnism-for-shell-scripts.html
[ -z "${SCRIPT_LOG+x}" ] && export SCRIPT_LOG=${HOME}/logs/scriptlog
mkdir -p "$(dirname ${SCRIPT_LOG})"
touch $SCRIPT_LOG


function SCRIPTENTRY(){
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        timeAndDate=`date`
        script_name=`basename -- "$0"`
        script_name="${script_name%.*}"
        echo "[$timeAndDate] [SCRIPTENTRY]  > $script_name $FUNCNAME" >> $SCRIPT_LOG
    fi
}

function SCRIPTEXIT(){
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        script_name=`basename -- "$0"`
        script_name="${script_name%.*}"
        echo "[$timeAndDate] [SCRIPTEXIT]  < $script_name $FUNCNAME" >> $SCRIPT_LOG
    fi
}

function ENTRY(){
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        local cfn="${FUNCNAME[1]}"
        timeAndDate=`date`
        echo "[$timeAndDate] [ENTRY]  > $cfn $FUNCNAME" >> $SCRIPT_LOG
    fi
}

function EXIT(){
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        local cfn="${FUNCNAME[1]}"
        timeAndDate=`date`
        echo "[$timeAndDate] [EXIT]  < $cfn $FUNCNAME" >> $SCRIPT_LOG
    fi
}

function logerror(){
    local function_name="${FUNCNAME[1]}"
    case $1 in
        -n)
            local opts="-n"
            shift
            ;;
    esac
    local msg="$1"
    [ -z "${msg:+x}" ] && return 0
    timeAndDate=`date`
    local loglevels
    declare -a loglevels
    loglevels=()
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        echo $opts "[ERROR] (${FUNCNAME[1]}) $msg" >&2
    fi
    if [[ ! ${loglevels[*]} =~ "${FILELOGLEVEL:-$FILELOGLEVEL_DEFAULT}" ]];then
        echo "[$timeAndDate] [ERROR] (${FUNCNAME[1]}) $msg" >> $SCRIPT_LOG
    fi
}

function logwarn(){
    local function_name="${FUNCNAME[1]}"
    case $1 in
        -n)
            local opts="-n"
            shift
            ;;
    esac
    local msg="$1"
    [ -z "${msg:+x}" ] && return 0
    timeAndDate=`date`
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" )
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        echo $opts "[WARN] (${FUNCNAME[1]}) $msg" >&2
    fi
    if [[ ! ${loglevels[*]} =~ "${FILELOGLEVEL:-$FILELOGLEVEL_DEFAULT}" ]];then
        echo "[$timeAndDate] [WARN] (${FUNCNAME[1]}) $msg" >> $SCRIPT_LOG
    fi
}

function loginfo(){
    local function_name="${FUNCNAME[1]}"
    case $1 in
        -n)
            local opts="-n"
            shift
            ;;
    esac
    local msg="$1"
    [ -z "${msg:+x}" ] && return 0
    timeAndDate=`date`
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" )
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        echo $opts "[INFO] (${FUNCNAME[1]}) $msg" >&2
    fi
    if [[ ! ${loglevels[*]} =~ "${FILELOGLEVEL:-$FILELOGLEVEL_DEFAULT}" ]];then
        echo "[$timeAndDate] [INFO] (${FUNCNAME[1]}) $msg" >> $SCRIPT_LOG
    fi
}


function logdebug(){
    local function_name="${FUNCNAME[1]}"
    case $1 in
        -n)
            local opts="-n"
            shift
            ;;
    esac
    local msg="$1"
    [ -z "${msg:+x}" ] && return 0
    timeAndDate=`date`
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        echo $opts "[DEBUG] (${FUNCNAME[1]}) $msg" >&2
    fi
    if [[ ! ${loglevels[*]} =~ "${FILELOGLEVEL:-$FILELOGLEVEL_DEFAULT}" ]];then
        echo "[$timeAndDate] [DEBUG] (${FUNCNAME[1]}) $msg" >> $SCRIPT_LOG
    fi
}

function logtrace(){
    local function_name="${FUNCNAME[1]}"
    case $1 in
        -n)
            local opts="-n"
            shift
            ;;
    esac
    local msg="$1"
    [ -z "${msg:+x}" ] && return 0
    timeAndDate=`date`
    local loglevels
    declare -a loglevels
    loglevels=("ERROR" "WARN" "INFO" "DEBUG")
    if [[ ! ${loglevels[*]} =~ "${LOGLEVEL:-$LOGLEVEL_DEFAULT}" ]];then
        echo $opts "[TRACE] (${FUNCNAME[1]}) $msg" >&2
    fi
    if [[ ! ${loglevels[*]} =~ "${FILELOGLEVEL:-$FILELOGLEVEL_DEFAULT}" ]];then
        echo "[$timeAndDate] [TRACE] (${FUNCNAME[1]}) $msg" >> $SCRIPT_LOG
    fi
}

export -f logerror
export -f logwarn
export -f loginfo
export -f logdebug
export -f logtrace
export -f SCRIPTENTRY
export -f ENTRY
export -f SCRIPTEXIT
export -f EXIT