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.Messages;
import net.sourceforge.phpdt.sql.adapters.AdapterFactory;
import net.sourceforge.phpdt.sql.adapters.DatabaseAdapter;
import net.sourceforge.phpdt.sql.sql.MultiSQLServer;
import net.sourceforge.phpdt.sql.sql.TableRow;
import net.sourceforge.phpdt.sql.sql.metadata.ObjectMetaData;
import net.sourceforge.phpdt.sql.view.BookmarkView;
import net.sourceforge.phpdt.sql.view.bookmark.BookmarkNode;
import net.sourceforge.phpdt.sql.view.bookmark.TreeNode;
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"); //$NON-NLS-1$
    }

    Composite container = new Composite(parent, SWT.NULL);
    GridLayout layout = new GridLayout();
    container.setLayout(layout);
    BookmarkNode bookmark = row.getBookmarkNode();
    TreeNode node = bookmark.find(row.getTable());
    ObjectMetaData metadata = null;
    if (node != null)
      metadata = node.getMetaData();

    int layoutColumns = 5;
    layout.numColumns = layoutColumns;

    if (DEBUG) {
      if (row == null) {
        System.out.println("Row is null"); //$NON-NLS-1$
      }
      if (row.getColumnNames() == null) {
        System.out.println("Columns are null"); //$NON-NLS-1$
      }
      if (row.getTableData() == null) {
        System.out.println("Data is null"); //$NON-NLS-1$
      }
    }

    columnNames = row.getColumnNames();
    String[] data = row.getTableData();

    if (DEBUG) {
      for (int i = 0; i < row.getColumnCount(); i++) {
        System.out.println("data = " + i + "=" + data[i]); //$NON-NLS-1$ //$NON-NLS-2$
        System.out.println("column = " + i + "=" + columnNames[i]); //$NON-NLS-1$ //$NON-NLS-2$
      }
    }

    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(Messages.getString("UpdateRowPage.ColumnName")); //$NON-NLS-1$
    temp = new Label(container, SWT.NULL);
    temp.setText(Messages.getString("UpdateRowPage.OldValue")); //$NON-NLS-1$
    temp = new Label(container, SWT.NULL);
    temp.setText(""); //$NON-NLS-1$
    temp = new Label(container, SWT.NULL);
    temp.setText(Messages.getString("UpdateRowPage.NewValue")); //$NON-NLS-1$
    temp = new Label(container, SWT.NULL);
    temp.setText(Messages.getString("UpdateRowPage._13")); //$NON-NLS-1$
    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("Where"); //$NON-NLS-1$
      if (metadata != null && metadata.getPrimaryKeyOrder(columnNames[i]) > 0)
        primaryKeys[i].setSelection(true);
      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(Messages.getString("UpdateRowPage.SetValue")); //$NON-NLS-1$
      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"); //$NON-NLS-1$
    }

    StringBuffer setClause = new StringBuffer();
    StringBuffer whereClause = new StringBuffer();
    BookmarkNode bookmark = row.getBookmarkNode();
    TreeNode node = bookmark.find(row.getTable());
    ObjectMetaData metadata = null;
    if (node != null)
      metadata = node.getMetaData();
    DatabaseAdapter adapter = AdapterFactory.getInstance().getAdapter(bookmark.getType());

    int numValuesSet = 0;
    int numValuesWhere = 0;
    for (int i = 0; i < columnNames.length; i++) {
      if (primaryKeys[i].getSelection()) {
        String value = oldValues[i].getText();
        if (numValuesWhere > 0)
          whereClause.append(" AND "); //$NON-NLS-1$
        whereClause.append("("); //$NON-NLS-1$
        whereClause.append(columnNames[i]);
        whereClause.append(" = "); //$NON-NLS-1$
        if (adapter != null && metadata != null && value != "") //$NON-NLS-1$
          whereClause.append(adapter.quote(value, metadata.getColumnType(columnNames[i])));
        else
          whereClause.append(value);
        whereClause.append(")"); //$NON-NLS-1$
        numValuesWhere++;
      }
      if (setValues[i].getSelection()) {
        String value = newValues[i].getText();
        if (numValuesSet > 0)
          setClause.append(", "); //$NON-NLS-1$
        setClause.append(columnNames[i]);
        setClause.append(" = "); //$NON-NLS-1$
        if (adapter != null && metadata != null && value != "") //$NON-NLS-1$
          setClause.append(adapter.quote(value, metadata.getColumnType(columnNames[i])));
        else
          setClause.append(value);
        numValuesSet++;

      }
    }
    String query = "UPDATE " + row.getTable(); //$NON-NLS-1$
    query += " SET " + setClause.toString(); //$NON-NLS-1$
    query += " WHERE " + whereClause.toString(); //$NON-NLS-1$
    this.query.setText(query);
  }
  public boolean performFinish() {
    MultiSQLServer server = MultiSQLServer.getInstance();
    BookmarkView bookmarkView = BookmarkView.getInstance();
    BookmarkNode bookmark = bookmarkView.getCurrentBookmark();
    server.execute(bookmark.getConnection(), query.getText());
    return true;
  }
}