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package info.lostred.ruler.engine;

import info.lostred.ruler.domain.Result;
import info.lostred.ruler.factory.RuleFactory;
import info.lostred.ruler.rule.AbstractRule;
import org.springframework.expression.BeanResolver;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;

import java.lang.reflect.Method;
import java.util.List;

import static info.lostred.ruler.constant.SpELConstants.INDEX_LABEL;

/**
 * 返回详细结果的规则引擎
 *
 * @author lostred
 */
public abstract class DetailRulesEngine extends AbstractRulesEngine {
    public DetailRulesEngine(RuleFactory ruleFactory, String businessType,
                             BeanResolver beanResolver, ExpressionParser parser, List globalFunctions) {
        super(ruleFactory, businessType, beanResolver, parser, globalFunctions);
    }

    /**
     * 针对详细结果的处理
     *
     * @param context 评估上下文
     * @param object  待校验的对象
     * @param result  引擎执行的结果
     * @param rule    当前规则
     */
    protected void handle(StandardEvaluationContext context, Object object, Result result, AbstractRule rule) {
        String parameterExp = rule.getRuleDefinition().getParameterExp();
        if (parameterExp.contains(INDEX_LABEL)) {
            String arrayExp = parameterExp.substring(0, parameterExp.indexOf(INDEX_LABEL));
            Object[] array = parser.parseExpression(arrayExp).getValue(context, Object[].class);
            this.executeForArray(context, array, rule, result);
        } else {
            this.executeForObject(context, object, rule, result);
        }
    }
}