__debug

#!/usr/bin/env zsh

function __start_debug() {
    export __DEBUG_FILE_NAME="${1:-$HOME/.__debug_${__debug_start_time}.log}"
    echo ${__DEBUG_FILE_NAME:a} | tee $__debug_file_path_location > /dev/null
    touch ${__DEBUG_FILE_NAME:a}
}

function __debug() {
    local __debug_file
    __debug_file=$(< $__debug_file_path_location)
    if [[ $# -gt 1 ]]; then
        __debug_file="${1:a}"
        shift
    fi
    if [[ ${1:-} == "hr" ]]; then
        echo "==================================================" | tee -a ${__debug_file:-$HOME/.__debug_${__debug_start_time}.log} > /dev/null && exit 0
    fi
    [[ ! -f ${__debug_file} ]] && touch ${__debug_file}
    __timestamp=$(date +"%Y-%m-%d %H:%M:%S")

    if [[ ${1:-} == "-" ]]; then
        while read line; do
            echo "[${__timestamp}] - $line" | tee -a ${__debug_file:-$HOME/.__debug_${__debug_start_time}.log} > /dev/null
        done < /dev/stdin
        return
    fi
    echo "[${__timestamp}] - $@" | tee -a ${__debug_file:-$HOME/.__debug_${__debug_start_time}.log} > /dev/null
}

function __tail_debug() {
    local __debug_file
    __debug_file=$(< $__debug_file_path_location)
    if [[ $# -gt 1 ]]; then
        __debug_file="${1:a}"
        shift
    fi
    [[ -z ${__debug_file} ]] && echo "No debug file set. Try running __debug start first" && exit 1
    echo "Waiting for ${__debug_file}"
    tail -f ${__debug_file} -n 0
}

function __file_debug() {
    echo ${__debug_file:-$HOME/.__debug_${__debug_start_time}.log}
}


function main() {
    if [[ $# -eq 0 ]]; then
        echo ""
        echo " USAGE: __debug start [file.log]"
        echo "        __debug [file.log] \"Debug message\""
        echo "        __debug tail [file.log]"
        echo "        __debug file"
        echo " "
        echo " file.log is an optional argument. If you don't pass a file to write to, debug will"
        echo " generate a file named after the pattern \$HOME/.__debug_\$__debug_start_time.log"
        echo " "
        echo " You can use __debug start and the following __debug calls will use the file set by"
        echo " the start command. Or you can simply pass __debug file.log \"Debug message\""
        echo ""
        echo " This is not meant to be used as a full logger. This is useful to debug scripts"
        echo " that may be running on the background or things like completion functions, for example"
        exit 0
    fi
    touch $__debug_file_path_location
    __debug_start_time=$(date +"%Y_%m_%d-%H%S")
    case $1 in
        (start)
            shift
            __start_debug "$@"
            ;;
        (tail)
            shift
            __tail_debug "$@"
            ;;
        (file)
            shift
            __file_debug
            ;;
        *)
            __debug "$@"
            ;;
    esac
}


__debug_file_path_location="/tmp/__debug_file_name"
main "$@"