/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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 org.apache.poi.hssf.record;

import org.apache.poi.ss.formula.ptg.Ptg;
import org.apache.poi.hssf.util.CellRangeAddress8Bit;
import org.apache.poi.ss.formula.Formula;
import org.apache.poi.util.HexDump;
import org.apache.poi.util.LittleEndianOutput;

/**
 * ARRAY (0x0221)<p>
 *
 * Treated in a similar way to SharedFormulaRecord
 */
public final class ArrayRecord extends SharedValueRecordBase implements Cloneable {

	public final static short sid = 0x0221;
	private static final int OPT_ALWAYS_RECALCULATE = 0x0001;
	private static final int OPT_CALCULATE_ON_OPEN  = 0x0002;

	private int _options;
	private int _field3notUsed;
	private Formula _formula;

	public ArrayRecord(RecordInputStream in) {
		super(in);
		_options = in.readUShort();
		_field3notUsed = in.readInt();
		int formulaTokenLen = in.readUShort();
		int totalFormulaLen = in.available();
		_formula = Formula.read(formulaTokenLen, in, totalFormulaLen);
	}

	public ArrayRecord(Formula formula, CellRangeAddress8Bit range) {
		super(range);
		_options = 0; //YK: Excel 2007 leaves this field unset
		_field3notUsed = 0;
		_formula = formula;
	}

	public boolean isAlwaysRecalculate() {
		return (_options & OPT_ALWAYS_RECALCULATE) != 0;
	}
	public boolean isCalculateOnOpen() {
		return (_options & OPT_CALCULATE_ON_OPEN) != 0;
	}

	public Ptg[] getFormulaTokens() {
		return _formula.getTokens();
	}

	protected int getExtraDataSize() {
		return 2 + 4 + _formula.getEncodedSize();
	}
	protected void serializeExtraData(LittleEndianOutput out) {
		out.writeShort(_options);
		out.writeInt(_field3notUsed);
		_formula.serialize(out);
	}

	public short getSid() {
		return sid;
	}

	public String toString() {
		StringBuffer sb = new StringBuffer();
		sb.append(getClass().getName()).append(" [ARRAY]\n");
		sb.append(" range=").append(getRange()).append("\n");
		sb.append(" options=").append(HexDump.shortToHex(_options)).append("\n");
		sb.append(" notUsed=").append(HexDump.intToHex(_field3notUsed)).append("\n");
		sb.append(" formula:").append("\n");
		Ptg[] ptgs = _formula.getTokens();
		for (int i = 0; i < ptgs.length; i++) {
			Ptg ptg = ptgs[i];
			sb.append(ptg).append(ptg.getRVAType()).append("\n");
		}
		sb.append("]");
		return sb.toString();
	}	
    
	@Override
    public ArrayRecord clone() {
        ArrayRecord rec = new ArrayRecord(_formula.copy(), getRange());

        // they both seem unused, but clone them nevertheless to have an exact copy
        rec._options = _options;
        rec._field3notUsed = _field3notUsed;

        return rec;
    }
}
