import java.io.PrintWriter;
import java.io.StringWriter;

import org.apache.log4j.Logger;

/**
 * 日志输出工具
 * Created by Nemo on 2017/6/12.
 */
public class LogUtils {

    private static Logger log = Logger.getLogger(LogUtils.class);

    /**
     * 打印警告
     *
     * @param obj
     */
    public static void warn(Object obj) {
        try{
            StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
            String text = getMsg(obj,stacks,"警告");
            log.warn(text);
        }catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 打印信息
     *
     * @param obj
     */
    public static void info(Object obj) {
        try{
            StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
            String text = getMsg(obj,stacks,"信息");
            log.info(text);
        }catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 调试信息
     *
     * @param obj
     */
    public static void debug(Object obj) {
        try{
            StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
            String text = getMsg(obj,stacks,"调试");
            log.debug(text);
        }catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 打印错误
     *
     * @param obj
     */
    public static void error(Object obj) {
        try{
            StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
            String text = getMsg(obj,stacks,"错误");
            log.error(text);
        }catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 处理信息
     * @param obj
     * @return
     */
    private static String dealMsg(Object obj){
        /*** 是否是异常  ***/
        if (obj instanceof Exception) {
            Exception e = (Exception) obj;
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw, true));
            return sw.toString();
        } else {
            return obj.toString();
        }
    }

    /**
     * 得到需要打印的信息
     * @param obj
     * @param stacks
     * @param level
     * @return
     */
    private static String getMsg(Object obj,StackTraceElement[] stacks,String level){
        String text = "\r\n"
                + "################################\r\n"
                + "日志级别:【"+level+"】\r\n"
                + "类：【"+stacks[2].getClassName() + "】\r\n"
                + "方法：【" + stacks[2].getMethodName() + "】\r\n"
                + "行：【" + stacks[2].getLineNumber() + "】\r\n"
                + "信息：【" + dealMsg(obj) + "】\r\n"
                + "################################";
        return text;
    }

    /**
     * 向数据库告警表中插入信息
     * @param obj
     */
    public static void dbWarn(Object obj) {
        try{
            String printInfo = "";
            /*** 获取输出信息的代码的位置 ***/
            String location = "";
            StackTraceElement[] stacks = Thread.currentThread().getStackTrace();
            location = stacks[2].getClassName() + "." + stacks[2].getMethodName()
                    + "(" + stacks[2].getLineNumber() + ")";

            /*** 是否是异常  ***/
            if (obj instanceof Exception) {
                Exception e = (Exception) obj;
                printInfo = location + e.getMessage();
                log.fatal(printInfo.substring(0, printInfo.length() > 512?512:printInfo.length()));
            } else {
                printInfo = location + obj.toString();
                log.fatal(printInfo.substring(0, printInfo.length() > 512?512:printInfo.length()));
            }
        }catch (Exception e) {
            e.printStackTrace();
        }
    }


}