/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

package org.openoffice.xmerge.converter.xml.sxc.pexcel;

import java.io.IOException;
import java.util.ArrayList;

import org.openoffice.xmerge.util.Debug;

import org.openoffice.xmerge.converter.xml.sxc.ColumnRowInfo;
import org.openoffice.xmerge.converter.xml.sxc.SpreadsheetEncoder;
import org.openoffice.xmerge.converter.xml.sxc.Format;
import org.openoffice.xmerge.converter.xml.sxc.BookSettings;
import org.openoffice.xmerge.converter.xml.sxc.NameDefinition;
import org.openoffice.xmerge.converter.xml.sxc.pexcel.records.Workbook;

/**
 *  This class is used by {@link SxcDocumentSerializerImpl} to encode the Pocket Excel format.
 *
 */
final class PocketExcelEncoder extends SpreadsheetEncoder {

    private Workbook wb;

    /**
     *  Constructor creates a Pocket Excel WorkBook.
     *
     *  @param  name      The name of the WorkBook.
     *
     *  @throws  IOException  If any I/O error occurs.
     */
    PocketExcelEncoder(String name) throws IOException {
        wb = new Workbook(name);
    }


    /**
     *  This method creates a WorkSheet belonging to the
     *  WorkBook.
     *
     *  @param  sheetName  The name of the WorkSheet.
     *
     *  @throws  IOException  If any I/O error occurs.
     */
    public void createWorksheet(String sheetName) throws IOException {

        wb.addWorksheet(sheetName);
    }


    /**
     *  This method gets the number of sheets in the WorkBook.
     *
     *  @return  The number of sheets in the WorkBook.
     */
    public int getNumberOfSheets() {

        ArrayList<Object> v = wb.getWorksheetNames();
        return (v.size());
    }


    /**
     *  This method returns the Workbook created.
     *
     *  @return  Returns a <code>Workbook</code>
     *
     *  @throws  IOException  If any I/O error occurs.
     */
    public Workbook getWorkbook() throws IOException {

        return wb;
    }

    /**
     *  This method converts a String containing a formula in infix notation
     *  to a String in Reverse Polish Notation (RPN)
     *
     *  @return a parsed pexcel formula in RPN
     */
    protected String parseFormula(String formula) {

        Debug.log(Debug.TRACE,"Strip Formula (Before) : " + formula);

        StringBuffer inFormula = new StringBuffer(formula);
        StringBuffer outFormula = new StringBuffer();

        boolean inBrace = false;
        boolean firstCharAfterBrace = false;
        boolean firstCharAfterColon = false;

        int len = inFormula.length();

        for (int in = 0; in < len; in++) {
            switch (inFormula.charAt(in)) {
            case '[':
                // We are now inside a StarOffice cell reference.
                // We also need to strip out the '['
                Debug.log(Debug.TRACE,"brace Found");
                inBrace = true;

                // If the next character is a '.', we want to strip it out
                firstCharAfterBrace = true;
                break;

            case ']':
                // We are exiting a StarOffice cell reference
                // We are stripping out the ']'
                inBrace = false;
                break;
            case '.':
                if (inBrace == true && (firstCharAfterBrace == true ||
                    firstCharAfterColon == true) ) {

                    Debug.log(Debug.TRACE,"dot Found and in brace");
                    // Since we are in a StarOffice cell reference,
                    // and we are the first character, we need to
                    // strip out the '.'
                    firstCharAfterBrace = false;
                    firstCharAfterColon = false;

                } else if(firstCharAfterColon == true) {
                    firstCharAfterColon = false;
                } else {
                    outFormula.append(inFormula.charAt(in));
                }
                break;

            case ':':
                // We have a cell range reference.
                // May need to strip out the leading '.'
                firstCharAfterColon = true;
                outFormula.append(inFormula.charAt(in));
                break;

            case ';':
                // StarOffice XML format uses ';' as a separator.  MiniCalc (and
                // many spreadsheets) use ',' as a separator instead.
                outFormula.append(',');
                break;

            default:
                // We hit valid data, lets add it to the formula string
                outFormula.append(inFormula.charAt(in));

                // Need to make sure that firstCharAfterBrace is not true.
                firstCharAfterBrace = false;
                break;
            }
        }

        Debug.log(Debug.TRACE,"Strip Formula (After) : " + outFormula);
        return outFormula.toString();
    }

    /**
     *  Add a cell to the current WorkSheet.
     *
     *  @param   row             The row number of the cell.
     *  @param   column          The column number of the cell.
     *  @param   fmt             The <code>Format</code> object describing
     *                           the appearance of this cell.
     *  @param   cellContents    The text or formula of the cell's contents.
     *
     *  @throws  IOException  If any I/O error occurs.
     */
    public void addCell(int row, int column, Format fmt, String cellContents) throws IOException {

        if (cellContents.startsWith("=")) {
            cellContents = parseFormula(cellContents);
            Debug.log(Debug.TRACE,"Parsing Formula " + cellContents);
        }
        wb.addCell(row, column, fmt, cellContents);
    }


    /**
     *  Set the width of the columns in the WorkBook.
     *
     *  @param  columnRows  An <code>ArrayList</code> of ColumnRowInfo
     */
    public void setColumnRows(ArrayList<ColumnRowInfo> columnRows) throws IOException {

        wb.addColInfo(columnRows);
    }

    public void setNameDefinition(NameDefinition nd) throws IOException {

        String parsedName = nd.getDefinition();
        nd.setDefinition(parseFormula(parsedName));

        wb.addNameDefinition(nd);
    }

    public void addSettings(BookSettings s) throws IOException {

        wb.addSettings(s);
    }


    /**
     *  Set a cell's formatting options via a separately create
     *  <code>Format</code> object.
     *
     *  @param  row     The row number of the cell to be changed.
     *  @param  column  The column number of the cell to be changed.
     *  @param  fmt     Object containing formatting settings for
     *                 this cell.
     */
    public void setCellFormat(int row, int column, Format fmt) {
        Debug.log(Debug.TRACE,"bold : " + fmt.getAttribute(Format.BOLD) +
                            ",Italic : " + fmt.getAttribute(Format.ITALIC) +
                            ",Underline : " + fmt.getAttribute(Format.UNDERLINE));
    }


    /**
     *  Get the names of the sheets in the WorkBook.
     *
     *  @param  sheet  The required sheet.
     */
    public String getSheetName(int sheet) {
        ArrayList<Object> v = wb.getWorksheetNames();
        String wsName = (String) (v.get(sheet));

        return wsName;
    }


}