package com.ruoyi.framework.util;

import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Objects;
import java.util.Random;
import java.util.StringJoiner;

@Component
public class MyUtil<T> {

    /**
     * 自定义调试工具类
     * @return
     */
    public static void PrintLog(String str){
        // 类名
        String className = Thread.currentThread().getStackTrace()[2].getClassName();
        // 函数名
        String methodName = Thread.currentThread().getStackTrace()[2].getMethodName();
        System.out.println("\033[1;94m" + className + "-->" + methodName + "-->"  + str + "\033[0m");
    }

    /**
     * 日期工具类
     * @return
     */
    public static String MyDateFormat(){
        //获取日期
        //导 import java.util.Date; 下的包
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        return sdf.format(date);
    }

    /**
     * 获取随机加密盐
     * @param n 位数
     * @return 返回随机加密盐
     */
    public static String getSalt(int n) {
        char[] chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890!@$%^&*.?".toCharArray();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; i++) {
            char c = chars[new Random().nextInt(chars.length)];
            sb.append(c);
        }
        return sb.toString();
    }

    /**
     * 获取随机数字
     * @param n 位数
     * @return 返回随机值
     */
    public static String getNumber(int n) {
        char[] chars = "1234567890".toCharArray();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; i++) {
            char c = chars[new Random().nextInt(chars.length)];
            sb.append(c);
        }
        return sb.toString();
    }

    public static String getTimeSixNumberCode(String prefix, String keyName){
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String format = simpleDateFormat.format(new Date());
        String timeStr = format.replace("-", "");
        long incrNum = RedisUtil.incr(keyName, 1);
        if(incrNum == 1){
            RedisUtil.expire(keyName, 60 * 60 * 24);
        }
        String sixIncr = String.format("%06d", incrNum);
        return prefix + timeStr + sixIncr;
    }

    /**
     * 判断是否为excel
     * @param file
     * @return
     */
    public static boolean isExcelFile(MultipartFile file) {
        if (file.isEmpty()) {
            return false;
        }
        String originalFilename = file.getOriginalFilename();
        if (originalFilename == null) {
            return false;
        }
        String[] parts = originalFilename.split("\\.");
        if (parts.length == 0) {
            return false;
        }
        String fileExtension = parts[parts.length - 1].toLowerCase();
        return fileExtension.equals("xls") || fileExtension.equals("xlsx");
    }

    /**
     *
     * @param delimiter
     * @param elements
     * @return
     */
    public static String joinChars(String delimiter,String... elements){
        Objects.requireNonNull(delimiter);
        Objects.requireNonNull(elements);
        // Number of elements not likely worth Arrays.stream overhead.
        StringJoiner joiner = new StringJoiner(delimiter);
        for (String cs: elements) {
            joiner.add(Objects.isNull(cs)?"":cs);
        }
        return joiner.toString();
    }

}