/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.ureport.expression.model.expr.ifelse;

import com.bstek.ureport.build.Context;
import com.bstek.ureport.expression.model.data.ExpressionData;
import com.bstek.ureport.expression.model.data.ObjectExpressionData;
import com.bstek.ureport.expression.model.expr.BaseExpression;
import com.bstek.ureport.expression.model.expr.ExpressionBlock;
import com.bstek.ureport.model.Cell;

import java.util.List;

/**
 * @author Jacky.gao
 * @since 2017年1月16日
 */
public class IfExpression extends BaseExpression {
    private static final long serialVersionUID = -514395376408127087L;
    private ExpressionConditionList conditionList;
    private ExpressionBlock expression;
    private List<ElseIfExpression> elseIfExpressions;
    private ElseExpression elseExpression;

    @Override
    protected ExpressionData<?> compute(Cell cell, Cell currentCell, Context context) {
        if (conditionList != null) {
            boolean result = conditionList.eval(context, cell, currentCell);
            if (result) {
                return expression.execute(cell, currentCell, context);
            }
        }
        if (elseIfExpressions != null) {
            for (ElseIfExpression elseIfExpr : elseIfExpressions) {
                if (elseIfExpr.conditionsEval(cell, currentCell, context)) {
                    return elseIfExpr.execute(cell, currentCell, context);
                }
            }
        }
        if (elseExpression != null) {
            return elseExpression.execute(cell, currentCell, context);
        }
        return new ObjectExpressionData(null);
    }

    public void setConditionList(ExpressionConditionList conditionList) {
        this.conditionList = conditionList;
    }

    public ExpressionConditionList getConditionList() {
        return conditionList;
    }

    public void setElseExpression(ElseExpression elseExpression) {
        this.elseExpression = elseExpression;
    }

    public void setElseIfExpressions(List<ElseIfExpression> elseIfExpressions) {
        this.elseIfExpressions = elseIfExpressions;
    }

    public ExpressionBlock getExpression() {
        return expression;
    }

    public void setExpression(ExpressionBlock expression) {
        this.expression = expression;
    }

    public ElseExpression getElseExpression() {
        return elseExpression;
    }

    public List<ElseIfExpression> getElseIfExpressions() {
        return elseIfExpressions;
    }
}
