package foundation.data.rule;

import foundation.dao.bizlogic.ICodeProvider;
import foundation.data.entity.Entity;
import foundation.data.meta.field.Field;
import foundation.data.object.IParamProvider;
import foundation.handler.IMessageReporter;
import foundation.variant.provider.DataEvent;

public class FieldDefaultValueRule {

	private RuleSource source;
	private Field field;
	private DataEvent dataEvent;
	private String rule;
	private FieldDefaultValueCreator valueCreator;
	private String remark;

	
	public FieldDefaultValueRule(Field field, String rule, RuleSource source, String remark) throws Exception {
		this.field = field;
		this.rule = rule;
		this.source = source;
		this.remark = remark;
		
		valueCreator = FieldDefaultValueCreator.getInstance(field.getName(), rule);
	}
	
	public FieldDefaultValueRule(Field field, FieldDefaultValueCreator creator, RuleSource source) throws Exception {
		this.field = field;
		this.valueCreator = creator;
		this.source = source;
		this.remark = field.getLabelChinese();
	}

	public void exec(DataEvent dataEvent, Entity entity, IParamProvider paramProvider, IMessageReporter reporter) {
		if (valueCreator == null) {
			return;
		}
		
		if (this.dataEvent != null && !this.dataEvent.isCompatibleWith(dataEvent)) {
			return;
		}
		
		Object value = valueCreator.exec(dataEvent, entity, paramProvider);
		
		if (reporter != null) {
			String str = String.valueOf(value);
			reporter.reportOneMessage("默认值", remark + "=" + str);
		}
	}

	public String getRule() {
		return rule;
	}

	public DataEvent getDataEvent() {
		return dataEvent;
	}

	public void setDataEvent(DataEvent dataEvent) {
		this.dataEvent = dataEvent;
	}

	public String getFieldName() {
		return field.getName();
	}

	public RuleSource getSource() {
		return source;
	}

	public String getRemark() {
		return remark;
	}
	
	public FieldDefaultValueCreator getValueCreator() {
		return valueCreator;
	}

	public FieldDefaultValueType getType() {
		if (valueCreator == null) {
			return null;
		}
		
		return valueCreator.getType();
	}

	public ICodeProvider getCodeProvider() {
		ICodeProvider provider = ICodeProvider.getInstance(field, rule);
		return provider;
	}
	
}