#!/bin/bash

# 自定义颜色显示
c_br='\e[1;31m'     # bold red
c_bg='\e[1;32m'     # bold green
c_by='\e[1;33m'     # bold yellow
c_bb='\e[1;34m'     # bold blue
c_bp='\e[1;35m'     # bold purple
c_bc='\e[1;36m'     # bold cyan
c_bir='\e[1;3;31m'  # * bold italic red
c_big='\e[1;3;32m'  # bold italic cyan
c_bib='\e[1;3;34m'  # * bold italic cyan
c_bic='\e[1;3;36m'  # bold italic cyan
c_e='\e[0m'         # reset

function usage() {
    echo -e "${c_bir}将日期转换成十进制和十六进制时间戳，输入日期格式可参考如下，中间空格可替换成[a-zA-Z@#%^*:]中的任意一个单字符：${c_e}"
    echo -e "  2023/03/09 09:29:02"
    echo -e "  2023-03-09 09:29:02"
    echo -e "  09/03/2023 09:29:02"
    echo -e "  09/Mar/2023 09:29:02"
    exit 4
}


ts=$@

if [[ $ts =~ (([J|j]an)|([F|f]eb)|([M|m]ar)|([A|a]pr)|([M|m]ay)|([J|j]un)|([J|j]ul)|([A|a]ug)|([S|s]ep)|([O|o]ct)|([N|n]ov)|([D|d]ec)) ]]; then
    [[ ${#ts} -ne 20 ]] && usage
else
    [[ ${#ts} -ne 19 ]] && usage
fi

# 2023/03/09 09:29:02
# 2023-03-09 09:29:02
fmt1="^[0-9]{4}[-/][0-9]{2}[-/][0-9]{2}[a-zA-Z@#%^*:]{0,1}[[:space:]]{0,1}[0-9]{2}:[0-9]{2}:[0-9]{2}$"
# 09/03/2023:09:29:02
fmt2="^[0-9]{2}/[0-9]{2}/[0-9]{4}[a-zA-Z@#%^*:]{0,1}[[:space:]]{0,1}[0-9]{2}:[0-9]{2}:[0-9]{2}$"
# 09/Mar/2023:09:29:02
fmt3="^[0-9]{2}/(([J|j]an)|([F|f]eb)|([M|m]ar)|([A|a]pr)|([M|m]ay)|([J|j]un)|([J|j]ul)|([A|a]ug)|([S|s]ep)|([O|o]ct)|([N|n]ov)|([D|d]ec))/[0-9]{4}[a-zA-Z@#%^*:]{0,1}[[:space:]]{0,1}[0-9]{2}:[0-9]{2}:[0-9]{2}$"
if [[ $ts =~ $fmt1 || $ts =~ $fmt2 ]]; then
    ts=${ts:0:10}' '${ts:11}
    dec=`date -d "$ts" +%s`
    hex=`echo "obase=16; $dec" | bc`
    echo "十进制的时间戳 - $dec"
    echo "十六进制时间戳 - 0x$hex - $hex"
    echo "十六进制时间戳 - 0x${hex,,} - ${hex,,}"

elif [[ $ts =~ $fmt3 ]]; then
    day=${ts:0:2}
    month=${ts:3:3}
    left=${ts:7}
    [[ $month =~ ^[J|j]an$ ]] && month='01'
    [[ $month =~ ^[F|f]eb$ ]] && month='02'
    [[ $month =~ ^[M|m]ar$ ]] && month='03'
    [[ $month =~ ^[A|a]pr$ ]] && month='04'
    [[ $month =~ ^[M|m]ay$ ]] && month='05'
    [[ $month =~ ^[J|j]un$ ]] && month='06'
    [[ $month =~ ^[J|j]ul$ ]] && month='07'
    [[ $month =~ ^[A|a]ug$ ]] && month='08'
    [[ $month =~ ^[S|s]ep$ ]] && month='09'
    [[ $month =~ ^[O|o]ct$ ]] && month='10'
    [[ $month =~ ^[N|n]ov$ ]] && month='11'
    [[ $month =~ ^[D|d]ec$ ]] && month='12'
    ts=$month'/'$day'/'$left
    ts=${ts:0:10}' '${ts:11}
    dec=`date -d "$ts" +%s`
    hex=`echo "obase=16; $dec" | bc`
    echo "十进制的时间 - $dec"
    echo "十六进制时间 - 0x${hex} - $hex"
    echo "十六进制时间 - 0x${hex,,} - ${hex,,}"
else
    echo -e "${c_br}请检查输入的时间符合正常规则，退出...${c_e}"
    usage
    exit 10
fi