/*******************************************************************************
 * 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.condition;

import com.bstek.ureport.Utils;
import com.bstek.ureport.build.Context;
import com.bstek.ureport.exception.ReportComputeException;
import com.bstek.ureport.expression.model.Expression;
import com.bstek.ureport.expression.model.data.ExpressionData;
import com.bstek.ureport.model.Cell;

import java.util.List;

/**
 * @author Jacky.gao
 * @since 2017年4月7日
 */
public class CellExpressionCondition extends BaseCondition {
    private final ConditionType type = ConditionType.cell;
    private String cellName;
    private Expression rightExpression;

    @Override
    Object computeLeft(Cell cell, Cell currentCell, Object obj, Context context) {
        if (cellName.equals(currentCell.getName())) {
            return currentCell.getData();
        } else {
            List<Cell> cells = Utils.fetchTargetCells(cell, context, cellName);
            int size = cells.size();
            if (size == 0) {
                return new ReportComputeException("Unknow cell : " + cellName);
            } else {
                for (Cell c : cells) {
                    if (c.getRow() == cell.getRow() || c.getColumn() == cell.getColumn()) {
                        return c.getData();
                    }
                }
                if (size > 1) {
                    StringBuilder sb = new StringBuilder();
                    for (Cell c : cells) {
                        if (sb.length() > 0) {
                            sb.append(",");
                        }
                        sb.append(c.getData());
                    }
                    return sb.toString();
                } else {
                    return cells.get(0).getData();
                }
            }
        }
    }

    @Override
    Object computeRight(Cell cell, Cell currentCell, Object obj, Context context) {
        ExpressionData<?> exprData = rightExpression.execute(cell, currentCell, context);
        return extractExpressionData(exprData);
    }

    @Override
    public ConditionType getType() {
        return type;
    }

    public void setCellName(String cellName) {
        this.cellName = cellName;
    }

    public void setRightExpression(Expression rightExpression) {
        this.rightExpression = rightExpression;
    }
}
