package org.activityinfo.server.endpoint.export;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;

import java.util.Date;
import java.util.HashMap;

public abstract class Exporter {

    public final HSSFWorkbook book;
    public final CreationHelper creationHelper;
    public HashMap<String, Integer> sheetNames;

    private CellStyle dateStyle;
    private CellStyle coordStyle;
    private CellStyle indicatorValueStyle;

    private CellStyle headerStyle;
    private CellStyle headerStyleCenter;
    private CellStyle headerStyleRight;

    public Exporter() {
        book = new HSSFWorkbook();
        creationHelper = book.getCreationHelper();
        sheetNames = new HashMap<String, Integer>();
    }

    public HSSFWorkbook getBook() {
        return book;
    }

    protected void declareStyles() {
        dateStyle = book.createCellStyle();
        dateStyle.setDataFormat(creationHelper.createDataFormat().getFormat("m/d/yy"));

        coordStyle = book.createCellStyle();
        coordStyle.setDataFormat(creationHelper.createDataFormat().getFormat("0.000000"));

        indicatorValueStyle = book.createCellStyle();
        indicatorValueStyle.setDataFormat(creationHelper.createDataFormat().getFormat("#,##0"));

        Font headerFont = book.createFont();
        headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);

        Font smallFont = book.createFont();
        smallFont.setFontHeightInPoints((short) 8);

        headerStyle = book.createCellStyle();
        headerStyle.setFont(headerFont);

        headerStyleCenter = book.createCellStyle();
        headerStyleCenter.setFont(headerFont);
        headerStyleCenter.setAlignment(CellStyle.ALIGN_CENTER);

        headerStyleRight = book.createCellStyle();
        headerStyleRight.setFont(headerFont);
        headerStyleRight.setAlignment(CellStyle.ALIGN_RIGHT);

    }

    protected Cell createHeaderCell(Row headerRow, int columnIndex, String text, CellStyle style) {
        Cell cell = headerRow.createCell(columnIndex);
        cell.setCellValue(creationHelper.createRichTextString(text));
        cell.setCellStyle(style);

        return cell;
    }

    protected Cell createHeaderCell(Row headerRow, int columnIndex, String text) {
        return createHeaderCell(headerRow, columnIndex, text, CellStyle.ALIGN_LEFT);
    }

    protected Cell createHeaderCell(Row headerRow, int columnIndex, String text, int align) {
        Cell cell = headerRow.createCell(columnIndex);
        cell.setCellValue(creationHelper.createRichTextString(text));

        switch (align) {
            case CellStyle.ALIGN_LEFT:
                cell.setCellStyle(headerStyle);
                break;
            case CellStyle.ALIGN_CENTER:
                cell.setCellStyle(headerStyleCenter);
                break;
            case CellStyle.ALIGN_RIGHT:
                cell.setCellStyle(headerStyleRight);
                break;
        }

        return cell;
    }

    protected Cell createCell(Row row, int columnIndex, String text) {
        Cell cell = row.createCell(columnIndex);
        cell.setCellValue(creationHelper.createRichTextString(text));
        return cell;
    }

    protected Cell createCell(Row row, int columnIndex, String text, CellStyle style) {
        Cell cell = createCell(row, columnIndex, text);
        cell.setCellStyle(style);
        return cell;
    }

    protected void createCell(Row row, int columnIndex, Date date) {
        Cell cell = row.createCell(columnIndex);
        cell.setCellValue(date);
        cell.setCellStyle(dateStyle);
    }
}