package com.zy.crm.manager.utils;

import com.zy.crm.manager.entity.Rule;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.ThreadLocalRandom;


/*
 * 定义一个规则：头：String ruleHeader;体： String ruleBody;连接符：String ruleConnector；连接符是否启用（0：启用；1：不启用。：Integer ruleConnectorType；规则方式（默认1：当前日期时间戳）：Integer ruleType；
 * 根据规则自动生成
 * Created by Monkey D. Luffy on 2023.08.22.
 * */
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);
        // 添加连接符（如果启用）
        if (ruleConnectorType == 0) {
            sb.append(ruleConnector);
        }

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

        // 添加规则值到字符串体
        sb.append(ruleBody);
        // 添加连接符（如果启用）
        if (ruleConnectorType == 0) {
            sb.append(ruleConnector);
        }
        sb.append(ruleValue);

        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();

        for (int i = 0; i < length; i++) {
            int index = ThreadLocalRandom.current().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();
        return now.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);// 返回生成的自定义日期时间戳
    }

    public static String rule(Rule rule){
        String ruleHeader = rule.getRuleHeader();
        String ruleBody = rule.getRuleBody();
        String ruleConnector = rule.getRuleConnector();
        int ruleConnectorType = rule.getRuleConnectorType();
        int ruleType = rule.getRuleType();

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

    public static void main(String[] args) {
        String ruleHeader = "HEADER";
        String ruleBody = "TIMESTAMP";
        String ruleConnector = "-";
        int ruleConnectorType = 1;
        int ruleType = 1;

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