package com.zy.crm.manager.utils;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Random;

public class RuleUtils {
    private String ruleHeader;
    private String ruleBody;
    private String ruleConnector;
    private int ruleConnectorType;
    private int ruleType;

    public RuleUtils(String ruleHeader, String ruleBody, String ruleConnector, int ruleConnectorType, int ruleType) {
        this.ruleHeader = ruleHeader;
        this.ruleBody = ruleBody;
        this.ruleConnector = ruleConnector;
        this.ruleConnectorType = ruleConnectorType;
        this.ruleType = ruleType;
    }

    public String generateString() {
        StringBuilder sb = new StringBuilder();

        // 添加头部
        sb.append(ruleHeader);

        // 根据规则方式生成日期时间戳或随机字符串
        String ruleValue = "";
        if (ruleType == 1) {
            ruleValue = String.valueOf(System.currentTimeMillis());
        } else if (ruleType == 2) {
            ruleValue = generateRandomString(10); // 生成长度为10的随机字符串
        } else if (ruleType == 3) {
            ruleValue = generateCustomTimestamp(); // 自定义生成日期时间戳的逻辑
        }

        // 添加规则值到字符串体
        sb.append(ruleBody);
        sb.append(ruleValue);

        // 添加连接符（如果启用）
        if (ruleConnectorType == 0) {
            sb.append(ruleConnector);
        }

        return sb.toString();
    }

    private String generateRandomString(int length) {
        // 生成指定长度的随机字符串的逻辑
        String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        StringBuilder sb = new StringBuilder();

        Random random = new Random();
        for (int i = 0; i < length; i++) {
            int index = random.nextInt(characters.length());
            char randomChar = characters.charAt(index);
            sb.append(randomChar);
        }

        return sb.toString();   // 返回生成的随机字符串
    }

    private String generateCustomTimestamp() {
        // 自定义生成日期时间戳的逻辑
        LocalDateTime now = LocalDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        return now.format(formatter);// 返回生成的自定义日期时间戳
    }

    public static void main(String[] args) {
        String ruleHeader = "Header: ";
        String ruleBody = "Timestamp: ";
        String ruleConnector = "-";
        int ruleConnectorType = 0;
        int ruleType = 1;

        RuleUtils generator = new RuleUtils(ruleHeader, ruleBody, ruleConnector, ruleConnectorType, ruleType);
        String generatedString = generator.generateString();
        System.out.println(generatedString);
    }
}