/* ====================================================================
   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.util.BitField;
import org.apache.poi.util.BitFieldFactory;
import org.apache.poi.util.HexDump;
import org.apache.poi.util.LittleEndianOutput;

/**
 * Title: COLINFO Record (0x007D)<p/>
 * Description:  Defines with width and formatting for a range of columns<p/>
 * REFERENCE:  PG 293 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<p/>
 * @author Andrew C. Oliver (acoliver at apache dot org)
 */
public final class ColumnInfoRecord extends StandardRecord {
    public static final short sid = 0x007D;

    private int _firstCol;
    private int _lastCol;
    private int _colWidth;
    private int _xfIndex;
    private int _options;
    private static final BitField hidden    = BitFieldFactory.getInstance(0x01);
    private static final BitField outlevel  = BitFieldFactory.getInstance(0x0700);
    private static final BitField collapsed = BitFieldFactory.getInstance(0x1000);
    // Excel seems write values 2, 10, and 260, even though spec says "must be zero"
    private int field_6_reserved;

    /**
     * Creates a column info record with default width and format
     */
    public ColumnInfoRecord() {
        setColumnWidth(2275);
        _options = 2;
        _xfIndex = 0x0f;
        field_6_reserved = 2; // seems to be the most common value
    }

    public ColumnInfoRecord(RecordInputStream in) { // NO_UCD
        _firstCol = in.readUShort();
        _lastCol  = in.readUShort();
        _colWidth = in.readUShort();
        _xfIndex  = in.readUShort();
        _options   = in.readUShort();
        switch(in.remaining()) {
            case 2: // usual case
                field_6_reserved  = in.readUShort();
                break;
            case 1:
                // often COLINFO gets encoded 1 byte short
                // shouldn't matter because this field is unused
                field_6_reserved  = in.readByte();
                break;
            case 0:
                // According to bugzilla 48332,
                // "SoftArtisans OfficeWriter for Excel" totally skips field 6
                // Excel seems to be OK with this, and assumes zero.
                field_6_reserved  = 0;
                break;
            default:
                throw new RuntimeException("Unusual record size remaining=(" + in.remaining() + ")");
        }
    }

    /**
     * set the columns' width in 1/256 of a character width
     * @param cw - column width
     */
    public void setColumnWidth(int cw) {
        _colWidth = cw;
    }

    /**
     * get the first column this record defines formatting info for
     * @return the first column index (0-based)
     */
    public int getFirstColumn() {
        return _firstCol;
    }

    /**
     * get the last column this record defines formatting info for
     * @return the last column index (0-based)
     */
    public int getLastColumn() {
        return _lastCol;
    }

    /**
     * @return column width in units of 1/256 of a character width
     */
    public int getColumnWidth() {
        return _colWidth;
    }

    /**
     * get the columns' default format info
     * @return the extended format index
     * @see org.apache.poi.hssf.record.ExtendedFormatRecord
     */
    public int getXFIndex() {
        return _xfIndex;
    }

    /**
     * @return whether the cells are hidden.
     */
    public boolean getHidden() {
        return hidden.isSet(_options);
    }

    /**
     * @return outline level for the cells
     */
    public int getOutlineLevel() {
        return outlevel.getValue(_options);
    }

    /**
     * @return whether the cells are collapsed
     */
    public boolean getCollapsed() {
        return collapsed.isSet(_options);
    }

    public boolean containsColumn(int columnIndex) {
        return _firstCol <= columnIndex && columnIndex <= _lastCol;
    }
    public boolean isAdjacentBefore(ColumnInfoRecord other) { // NO_UCD
        return _lastCol == other._firstCol - 1;
    }

    /**
     * @return <code>true</code> if the format, options and column width match
     */
    public boolean formatMatches(ColumnInfoRecord other) { // NO_UCD
        if (_xfIndex != other._xfIndex) {
            return false;
        }
        if (_options != other._options) {
            return false;
        }
        if (_colWidth != other._colWidth) {
            return false;
        }
        return true;
    }

    public short getSid() {
        return sid;
    }

    public void serialize(LittleEndianOutput out) {
        out.writeShort(getFirstColumn());
        out.writeShort(getLastColumn());
        out.writeShort(getColumnWidth());
        out.writeShort(getXFIndex());
        out.writeShort(_options);
        out.writeShort(field_6_reserved);
    }

    protected int getDataSize() {
        return 12;
    }

    public String toString() {
        StringBuilder sb = new StringBuilder();

        sb.append("[COLINFO]\n");
        sb.append("  colfirst = ").append(getFirstColumn()).append("\n");
        sb.append("  collast  = ").append(getLastColumn()).append("\n");
        sb.append("  colwidth = ").append(getColumnWidth()).append("\n");
        sb.append("  xfindex  = ").append(getXFIndex()).append("\n");
        sb.append("  options  = ").append(HexDump.shortToHex(_options)).append("\n");
        sb.append("    hidden   = ").append(getHidden()).append("\n");
        sb.append("    olevel   = ").append(getOutlineLevel()).append("\n");
        sb.append("    collapsed= ").append(getCollapsed()).append("\n");
        sb.append("[/COLINFO]\n");
        return sb.toString();
    }

    public Object clone() {
        ColumnInfoRecord rec = new ColumnInfoRecord();
        rec._firstCol = _firstCol;
        rec._lastCol = _lastCol;
        rec._colWidth = _colWidth;
        rec._xfIndex = _xfIndex;
        rec._options = _options;
        rec.field_6_reserved = field_6_reserved;
        return rec;
    }
}
