package net.sourceforge.phpdt.sql.wizards;

import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import net.sourceforge.phpdt.sql.sql.MultiSQLServer;
import net.sourceforge.phpdt.sql.sql.TableRow;
import net.sourceforge.phpdt.sql.view.tableview.TableAdapter;

public class UpdateRowPage extends WizardPage implements SQLPage {
  TableRow row;
  String[] columnNames;
  Text[] oldValues;
  Text[] newValues;
  Button[] primaryKeys;
  Button[] setValues;
  Label query;
  public UpdateRowPage(String pageName) {
    super(pageName);
  }

  public void init(TableRow row, TableAdapter adapter) {
    this.row = row;
  }

  public void createControl(Composite parent) {
    if (DEBUG) {
      System.out.println("page create control");
    }
    Composite container = new Composite(parent, SWT.NULL);
    GridLayout layout = new GridLayout();
    container.setLayout(layout);
    int layoutColumns = 5;
    layout.numColumns = layoutColumns;

    if (DEBUG) {
      if (row == null) {
        System.out.println("Row is null");
      }
      if (row.getColumnNames() == null) {
        System.out.println("Columns are null");
      }
      if (row.getTableData() == null) {
        System.out.println("Data is null");
      }
    }

    columnNames = row.getColumnNames();
    String[] data = row.getTableData();
    if (DEBUG) {
      for (int i = 0; i < row.getColumnCount(); i++) {
        System.out.println("data = " + i + "=" + data[i]);
        System.out.println("column = " + i + "=" + columnNames[i]);
      }
    }
    oldValues = new Text[row.getColumnCount()];
    newValues = new Text[row.getColumnCount()];
    primaryKeys = new Button[row.getColumnCount()];
    setValues = new Button[row.getColumnCount()];
    Label temp = new Label(container, SWT.NULL);
    temp.setText("Column Name");
    temp = new Label(container, SWT.NULL);
    temp.setText("Old Value");
    temp = new Label(container, SWT.NULL);
    temp.setText("");
    temp = new Label(container, SWT.NULL);
    temp.setText("New Value");
    temp = new Label(container, SWT.NULL);
    temp.setText("");
    for (int i = 0; i < row.getColumnCount(); i++) {
      Label label = new Label(container, SWT.NULL);
      label.setText(columnNames[i]);
      oldValues[i] = new Text(container, SWT.BORDER | SWT.SINGLE);
      oldValues[i].setText(data[i]);
      oldValues[i].addModifyListener(new ModifyListener() {
        public void modifyText(ModifyEvent e) {
          updateQuery();
        }
      });
      primaryKeys[i] = new Button(container, SWT.CHECK);
      primaryKeys[i].setText("Primary Key");
      primaryKeys[i].addSelectionListener(new SelectionListener() {
        public void widgetDefaultSelected(SelectionEvent e) {
        }
        public void widgetSelected(SelectionEvent e) {
          updateQuery();
        }
      });
      newValues[i] = new Text(container, SWT.BORDER | SWT.SINGLE);
      newValues[i].setText(data[i]);
      newValues[i].addModifyListener(new ModifyListener() {
        public void modifyText(ModifyEvent e) {
          updateQuery();
        }
      });
      setValues[i] = new Button(container, SWT.CHECK);
      setValues[i].setText("Set Value");
      setValues[i].addSelectionListener(new SelectionListener() {
        public void widgetDefaultSelected(SelectionEvent e) {
        }
        public void widgetSelected(SelectionEvent e) {
          updateQuery();
        }
      });
    }
    query = new Label(container, SWT.WRAP);
    GridData gridData = new GridData();
    gridData.horizontalSpan = layoutColumns;
    gridData.horizontalAlignment = GridData.FILL;
    gridData.verticalAlignment = GridData.FILL;
    gridData.grabExcessHorizontalSpace = true;
    gridData.grabExcessVerticalSpace = true;
    query.setLayoutData(gridData);

    setControl(container);
    updateQuery();

    setPageComplete(true);
  }
  public void updateQuery() {
    if (DEBUG) {
      System.out.println("Updating query");
    }
    StringBuffer setClause = new StringBuffer();
    StringBuffer whereClause = new StringBuffer();
    for (int i = 0; i < columnNames.length; i++) {
      if (primaryKeys[i].getSelection()) {
        whereClause.append(columnNames[i]);
        whereClause.append(" = ");
        whereClause.append(oldValues[i].getText());
        whereClause.append(", ");
      }
      if (setValues[i].getSelection()) {
        setClause.append(columnNames[i]);
        setClause.append(" = ");
        setClause.append(newValues[i].getText());
        setClause.append(", ");
      }
    }
    if (whereClause.length() > 1) {
      whereClause.deleteCharAt(whereClause.length() - 1);
      whereClause.deleteCharAt(whereClause.length() - 1);
    }
    if (setClause.length() > 1) {
      setClause.deleteCharAt(setClause.length() - 1);
      setClause.deleteCharAt(setClause.length() - 1);
    }
    String query = "UPDATE " + row.getTable();
    query += " SET " + setClause.toString();
    query += " WHERE " + whereClause.toString();
    this.query.setText(query);
  }
  public boolean performFinish() {
    MultiSQLServer server = MultiSQLServer.getInstance();
    server.execute(query.getText());
    return true;
  }
}