#!/bin/bash
cd "$(dirname "$(readlink -f "$0")")"

G_DIR="../logs"
LOG_DIR=${G_DIR}


# Help function
function help() {
    echo -e "Usage: \n\t$(basename "$0")  <program_name> {-t|-d|-i|-w|-e|-f}\n"
    echo -e "\t  -t|-v : \t Extract lines with [T]race level:    6 "
    echo -e "\t  -d    : \t Extract lines with [D]ebug level:    5 "
    echo -e "\t  -i    : \t Extract lines with [I]nfo level:     4 "
    echo -e "\t  -w    : \t Extract lines with [W]arn level:     3 "
    echo -e "\t  -e    : \t Extract lines with [E]rror level:    2 "
    echo -e "\t  -c|-f : \t Extract lines with [C]ritical(Fault) 1 "
    echo -e "\t  -err  : \t Extract lines with [E]rror level: 2 for error.log"
    echo -e "\t  -clear: \t Clear the log file for the specified program, but Reverse error.log"
    echo -e "\t  -g    : \t Get <program> log level:\t manage logic tcpcomm uartcomm ..."
    echo -e "\t  -s <L>: \t Set <program> log level x: [1-C, 2-E, 3-W, 4-I, 5-D, 6-T] "
    echo -e ""
}

# Clear log file function
function clear_log() {
    local program_name=$1
    log_file="${LOG_DIR}/$program_name/$program_name.log"
    log_err_file="${LOG_DIR}/$program_name/${program_name}_error.log"
    if [ -f "$log_file" ]; then
        > "$log_file"
        echo "Log file for $program_name cleared."
    #    > "$log_err_file"
    #    echo "Log file for ${program_name}_error cleared."
    else
        echo "Log file for $program_name does not exist."
    fi
}

# Extract log function
function extract_log() {
    local level=$1
    local program_name=$2
    log_file="${LOG_DIR}/$program_name/$program_name.log"
    log_err_file="${LOG_DIR}/$program_name/${program_name}_error.log"

    if [ -f "$log_file" ]; then

        case "$level" in
            T|t|Trace|trace|V|v|Verbose|verbose)
                tail -f "$log_file" 	#| grep -E "\[T|Trace\]"
                ;;
            D|d|Debug|debug)
                tail -f "$log_file" | grep -vE "\[T|Trace\]"	#| grep -E "\[D|Debug\]"
                ;;
            I|i|Info|info)
                tail -f "$log_file" | grep -vE "\[T|Trace\]|\[D|Debug\]"	# | grep -E "\[I|Info\]"
                ;;
            W|w|Warn|warn)
                tail -f "$log_file" | grep -vE "\[T|Trace\]|\[D|Debug\]|\[I|Info\]"		# | grep -E "\[W|Warn\]"
                ;;
            E|e|Error)
                tail -f "$log_file" | grep -vE "\[T|Trace\]|\[D|Debug\]|\[I|Info\]|\[W|Warn\]"		# | grep -E "\[E|Error\]"
                ;;
            err|error)
                tail -f "$log_err_file"
                ;;
            C|c|Critical|critical|F|f|Fault|fault)
                tail -f "$log_file" | grep -E "\[C|Critical\]"
                ;;
            *)
                help
                exit 1
                ;;
        esac
    else
        echo "Log file for $program_name does not exist."
    fi
}

# Extract log function
function level_log() {
    local cmd=$1
    local program_name=$2
    local level=$3
    log_file="${LOG_DIR}/$program_name/$program_name.log"
	lv_file="/tmp/prlog/level/$program_name"
    if [ -f "$log_file" ]; then
        case "$cmd" in
            Get)
                cat "$lv_file" 	#| grep -E "\[T|Trace\]"
                ;;
            Set)
                echo "${level}" > "$lv_file"
                ;;
            *)
                help
                exit 1
                ;;
        esac
    else
        echo "Log file for $program_name does not exist."
    fi
}
# Check if correct number of arguments is passed
if [ "$#" -lt 2 ]; then
    help
    exit 1
fi

# Parse options and arguments
option=$1
program_name=$2
level=$3

# swap $1 $2 
if [[ "$2" = -* ]];then
	option=$2
	program_name=$1
fi

#echo "1: $1  2: $2"

case "$option" in
    -v|--verbose)
        extract_log "V" "$program_name"
        ;;
    -t|--trace)
        extract_log "V" "$program_name"
        ;;
    -d|--debug)
        extract_log "D" "$program_name"
        ;;
    -i|--info)
        extract_log "I" "$program_name"
        ;;
    -w|--warn)
        extract_log "W" "$program_name"
        ;;
    -e|--error)
        extract_log "E" "$program_name"
        ;;
    -err|--err)
        extract_log "err" "$program_name"
        ;;
    -c|--critical)
        extract_log "C" "$program_name"
        ;;
    -f|--fault)
        extract_log "C" "$program_name"
        ;;
    -clear|--clear)
        clear_log "$program_name"
        ;;
     -g)
        level_log "Get" "$program_name"
        ;;
     -s)
        level_log "Set" "$program_name" "${level}"
        ;;
    *)
        echo "[$@]"
        help
        exit 1
        ;;
esac