package jxl.read.biff;

import common.Assert;
import common.Logger;
import jxl.CellType;
import jxl.WorkbookSettings;
import jxl.biff.DoubleHelper;
import jxl.biff.FormattingRecords;
import jxl.biff.IntegerHelper;
import jxl.biff.WorkbookMethods;
import jxl.biff.formula.ExternalSheet;

class FormulaRecord extends CellValue {
  private static Logger logger = Logger.getLogger(FormulaRecord.class);
  
  private CellValue formula;
  
  private boolean shared;
  
  private static class IgnoreSharedFormula {
    private IgnoreSharedFormula() {}
  }
  
  public static final IgnoreSharedFormula ignoreSharedFormula = new IgnoreSharedFormula();
  
  public FormulaRecord(Record t, File excelFile, FormattingRecords fr, ExternalSheet es, WorkbookMethods nt, SheetImpl si, WorkbookSettings ws) {
    super(t, fr, si);
    byte[] data = getRecord().getData();
    this.shared = false;
    int grbit = IntegerHelper.getInt(data[14], data[15]);
    if ((grbit & 0x8) != 0) {
      this.shared = true;
      if (data[6] == 0 && data[12] == -1 && data[13] == -1) {
        this.formula = new SharedStringFormulaRecord(t, excelFile, fr, es, nt, si, ws);
      } else if (data[6] == 2 && data[12] == -1 && data[13] == -1) {
        int errorCode = data[8];
        this.formula = new SharedErrorFormulaRecord(t, excelFile, errorCode, fr, es, nt, si);
      } else {
        double value = DoubleHelper.getIEEEDouble(data, 6);
        SharedNumberFormulaRecord snfr = new SharedNumberFormulaRecord(t, excelFile, value, fr, es, nt, si);
        snfr.setNumberFormat(fr.getNumberFormat(getXFIndex()));
        this.formula = snfr;
      } 
      return;
    } 
    if (data[6] == 0 && data[12] == -1 && data[13] == -1) {
      this.formula = new StringFormulaRecord(t, excelFile, fr, es, nt, si, ws);
    } else if (data[6] == 1 && data[12] == -1 && data[13] == -1) {
      this.formula = new BooleanFormulaRecord(t, fr, es, nt, si);
    } else if (data[6] == 2 && data[12] == -1 && data[13] == -1) {
      this.formula = new ErrorFormulaRecord(t, fr, es, nt, si);
    } else if (data[6] == 3 && data[12] == -1 && data[13] == -1) {
      this.formula = new StringFormulaRecord(t, fr, es, nt, si);
    } else {
      this.formula = new NumberFormulaRecord(t, fr, es, nt, si);
    } 
  }
  
  public FormulaRecord(Record t, File excelFile, FormattingRecords fr, ExternalSheet es, WorkbookMethods nt, IgnoreSharedFormula i, SheetImpl si, WorkbookSettings ws) {
    super(t, fr, si);
    byte[] data = getRecord().getData();
    this.shared = false;
    if (data[6] == 0 && data[12] == -1 && data[13] == -1) {
      this.formula = new StringFormulaRecord(t, excelFile, fr, es, nt, si, ws);
    } else if (data[6] == 1 && data[12] == -1 && data[13] == -1) {
      this.formula = new BooleanFormulaRecord(t, fr, es, nt, si);
    } else if (data[6] == 2 && data[12] == -1 && data[13] == -1) {
      this.formula = new ErrorFormulaRecord(t, fr, es, nt, si);
    } else {
      this.formula = new NumberFormulaRecord(t, fr, es, nt, si);
    } 
  }
  
  public String getContents() {
    Assert.verify(false);
    return "";
  }
  
  public CellType getType() {
    Assert.verify(false);
    return CellType.EMPTY;
  }
  
  final CellValue getFormula() {
    return this.formula;
  }
  
  final boolean isShared() {
    return this.shared;
  }
}