package cn.autoform.web.client.util.auto;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.RandomUtils;

public class ParamFactory {

	private static final Map<String, RuleActuator> RULE_ACTUATOR = new HashMap<>();
	
	private static String begain;
	
	static{
		/**
		 * 日期
		 */
		RULE_ACTUATOR.put("d", ruleParam->{
			return new SimpleDateFormat(ruleParam.getCondition()).format(new Date());
		});
		
		/**
		 * 随机字符
		 */
		RULE_ACTUATOR.put("rs", ruleParam->{
			return RandomStringUtils.randomAlphanumeric(Integer.parseInt(ruleParam.getCondition()));
		});

		/**
		 * 随机数字
		 */
		RULE_ACTUATOR.put("rn", ruleParam->{
			StringBuilder num = new StringBuilder();
			for (int i = 0; i < Integer.parseInt(ruleParam.getCondition()); i++) {
				num.append('9');
			}
			return String.format("%0"+ruleParam.getCondition()+"d", RandomUtils.nextInt(0, Integer.parseInt(num.toString())));
		});
		
		RULE_ACTUATOR.put("in", ruleParam->{
			StringBuilder num = new StringBuilder();
			Integer begain = getBegain().length();
			for (int i = 0; i < Integer.parseInt(ruleParam.getCondition())-begain; i++) {
				num.append('0');
			}
			num.append(getBegain());
			return num.toString();
		});
		
		
	}
	
	/**
	 * 获得参数执行器
	 * @param type
	 * @return
	 */
	public static RuleActuator getRuleActuator(String type){
		type = type.toLowerCase();
		return RULE_ACTUATOR.get(type);
	}
	
	private static String getBegain() {
		return begain;
	}

	public static void setBegain(String begain) {
		ParamFactory.begain = begain;
	}
	
}