package jxl.read.biff;

import common.Logger;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import jxl.CellType;
import jxl.NumberCell;
import jxl.NumberFormulaCell;
import jxl.biff.DoubleHelper;
import jxl.biff.FormattingRecords;
import jxl.biff.FormulaData;
import jxl.biff.WorkbookMethods;
import jxl.biff.formula.ExternalSheet;
import jxl.biff.formula.FormulaException;
import jxl.biff.formula.FormulaParser;

class NumberFormulaRecord extends CellValue implements NumberCell, FormulaData, NumberFormulaCell {
  private static Logger logger = Logger.getLogger(NumberFormulaRecord.class);
  
  private double value;
  
  private NumberFormat format;
  
  private static final DecimalFormat defaultFormat = new DecimalFormat("#.###");
  
  private String formulaString;
  
  private ExternalSheet externalSheet;
  
  private WorkbookMethods nameTable;
  
  private byte[] data;
  
  public NumberFormulaRecord(Record t, FormattingRecords fr, ExternalSheet es, WorkbookMethods nt, SheetImpl si) {
    super(t, fr, si);
    this.externalSheet = es;
    this.nameTable = nt;
    this.data = getRecord().getData();
    this.format = fr.getNumberFormat(getXFIndex());
    if (this.format == null)
      this.format = defaultFormat; 
    this.value = DoubleHelper.getIEEEDouble(this.data, 6);
  }
  
  public double getValue() {
    return this.value;
  }
  
  public String getContents() {
    return !Double.isNaN(this.value) ? this.format.format(this.value) : "";
  }
  
  public CellType getType() {
    return CellType.NUMBER_FORMULA;
  }
  
  public byte[] getFormulaData() throws FormulaException {
    if (!getSheet().getWorkbookBof().isBiff8())
      throw new FormulaException(FormulaException.biff8Supported); 
    byte[] d = new byte[this.data.length - 6];
    System.arraycopy(this.data, 6, d, 0, this.data.length - 6);
    return d;
  }
  
  public String getFormula() throws FormulaException {
    if (this.formulaString == null) {
      byte[] tokens = new byte[this.data.length - 22];
      System.arraycopy(this.data, 22, tokens, 0, tokens.length);
      FormulaParser fp = new FormulaParser(tokens, this, this.externalSheet, this.nameTable, getSheet().getWorkbook().getSettings());
      fp.parse();
      this.formulaString = fp.getFormula();
    } 
    return this.formulaString;
  }
  
  public NumberFormat getNumberFormat() {
    return this.format;
  }
}