package com.glxp.api.idc.utils;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;


/**
 * @author chenqf
 */
public class IDCUtils {
	private static final Logger logger = LoggerFactory.getLogger(IDCUtils.class);
 	private static String aliasNameChars = "_hijklmnopqrstuvwxyzabcdefg9876543210";
	private static String realNamechars  = "abcdefghijklmnopqrstuvwxyz_0123456789";
	private final static String MONTH_EN = "JanFebMarAprMayJunJulAugSepOctNovDec";

	//判断是否json字符串
	public static boolean isJson(String json) {
		if(json!=null&&json.contains("{")&&json.contains("}")&&json.contains("\""))
			return true;
		return false;
	}
	public static Date parseDate(String str) {
    	return parseDate(str,"yyyy-MM-dd HH:mm:ss");
    }
    public static Date parseDate(String str,String fmt) {
    	String dateStr=str.replace("?", " ");
    	SimpleDateFormat df = new SimpleDateFormat(fmt);
    	if(str!=null&&!str.contains("-")&&str.length()>7&&StringUtils.isNumeric(str.substring(0, 4))&&
    		Long.valueOf(str.substring(0,4))>1899&&Long.valueOf(str.substring(0,4))<2199&&
    		StringUtils.isNumeric(str.substring(4, 6))&&StringUtils.isNumeric(str.substring(6, 8))&&
    		(!str.contains(" ")||(str.contains(" ")&&str.indexOf(" ")>7))) {
    		dateStr = str.substring(0,4)+"-"+str.substring(4,6)+"-"+str.substring(6,8);
    		dateStr+=" ";
    		if(str.contains(" ")) {
    			if(str.length()>9) {
    				dateStr+= str.substring(9,11);
    				if(str.length()>11) {
        				dateStr+=":"+str.substring(11,13);
        				if(str.length()>13) {
        					dateStr+=":"+str.substring(13,15);
        				}
        			} else {
        				dateStr+=":00:00";
        			}
    			} else {
    				dateStr+="00:00:00";
    			}
    		} else {
    			if(str.length()>8) {
    				dateStr+= str.substring(8,10);
    				if(str.length()>10) {
        				dateStr+=":"+str.substring(10,12);
        				if(str.length()>13) {
        					dateStr+=":"+str.substring(12,14);
        				} if(str.length()>12) {
        					dateStr+=":"+str.substring(12,13)+"0";
        				}
        			} else {
        				dateStr+=":00:00";
        			}
    			} else {
    				dateStr+="00:00:00";
    			}
    		}
    	} else if(str!=null&&str.contains("CST")) {
    		//Wed Feb 16 15:35:31 CST 2022
    		int index = str.indexOf("CST");
    		int month = (MONTH_EN.indexOf(str.substring(index -16,index -13))+3)/3;
    		dateStr = str.substring(index+4)+"-";
    		if(month<10)
    			dateStr+="0";
    		dateStr+= month+"-"+str.substring(index -12,index -10)+" "+str.substring(index -9,index -1);
    	} else if(str!=null&&str.contains("GMT")) {
    		int index = str.indexOf("GMT");
    		int month = (MONTH_EN.indexOf(str.substring(index -16,index -13))+3)/3;
    		if(str.contains("GMT+")) {
    			dateStr = str.substring(index+10)+"-";
    		} else {
    			dateStr = str.substring(index+4)+"-";
    		}
    		if(month<10)
    			dateStr+="0";
    		dateStr+= month+"-"+str.substring(index -12,index -10)+" "+str.substring(index -9,index -1);
    	} else if (str!=null&&str.equals("-30609820800000")) {
    		dateStr="1000-01-01 00:01:01";
    	} else if (str!=null&&str.length()==4&&StringUtils.isNumeric(str)&&Integer.valueOf(str)>999) {
    		dateStr=str+"-01-01 00:01:01";
    	} else if (str!=null&&str.length()==6&&StringUtils.isNumeric(str)) {
    		dateStr=str.substring(0, 4)+"-"+str.substring(4)+"-01 00:01:01";
    	} else if(str!=null&&StringUtils.isNumeric(str)&&str.length()>8&&(Long.valueOf(str.substring(0,4))<1899||Long.valueOf(str.substring(0,4))>2200)) {
    		dateStr=df.format(new Date(Long.valueOf(str)));
    	}
    	dateStr = dateStr.replace("T", " ");

        Date date = null;
        try {
        	date = df.parse(dateStr);

        } catch (ParseException e) {
        	logger.error(e.getMessage());
        }
        return date;
     }

}