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 DeleteRowPage extends WizardPage implements SQLPage {
  TableRow row;
  String[] columnNames;
  Text[] values;
  Button[] whereValues;
  Text query;

  public DeleteRowPage(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);
    layout.numColumns = 3;

    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"); //$NON-NLS-1$
      }
    }
    BookmarkNode bookmark = row.getBookmarkNode();
    TreeNode node = bookmark.find(row.getTable());
    ObjectMetaData metadata = null;
    if (node != null)
      metadata = node.getMetaData();
    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]); //$NON-NLS-1$ //$NON-NLS-2$
      }
    }

    values = new Text[row.getColumnCount()];
    whereValues = new Button[row.getColumnCount()];
    new Label(container, SWT.NULL).setText(Messages.getString("DeleteRowPage.ColumnName")); //$NON-NLS-1$
    new Label(container, SWT.NULL).setText(Messages.getString("DeleteRowPage.Value")); //$NON-NLS-1$
    new Label(container, SWT.NULL).setText(Messages.getString("DeleteRowPage.IncludeIn")); //$NON-NLS-1$
    for (int i = 0; i < row.getColumnCount(); i++) {
      Label label = new Label(container, SWT.NULL);
      label.setText(columnNames[i]);
      values[i] = new Text(container, SWT.BORDER | SWT.SINGLE);
      GridData fullHorizontal = new GridData();
      fullHorizontal.horizontalAlignment = GridData.FILL;
      values[i].setLayoutData(fullHorizontal);
      values[i].setText(data[i]);

      values[i].addModifyListener(new ModifyListener() {
        public void modifyText(ModifyEvent e) {
          updateQuery();
        }
      });

      whereValues[i] = new Button(container, SWT.CHECK);
      whereValues[i].setText(Messages.getString("DeleteRowPage.WhereClause")); //$NON-NLS-1$
      // we check if it's a primary key to select it in the WHERE clause
      if (metadata != null && metadata.getPrimaryKeyOrder(columnNames[i]) > 0)
        whereValues[i].setSelection(true);
      else
        whereValues[i].setSelection(false);
      whereValues[i].addSelectionListener(new SelectionListener() {
        public void widgetDefaultSelected(SelectionEvent e) {
        }
        public void widgetSelected(SelectionEvent e) {
          updateQuery();
        }
      });
    }
    query = new Text(container, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP);
    GridData gridData = new GridData();
    gridData.horizontalSpan = layout.numColumns;
    gridData.verticalSpan = 3;
    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(Messages.getString("DeleteRowPage.UpdatingQuery")); //$NON-NLS-1$
    }

    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 numSelected = 0;
    for (int i = 0; i < columnNames.length; i++) {
      if (whereValues[i].getSelection()) {
        if (numSelected > 0)
          whereClause.append(" AND "); //$NON-NLS-1$
        numSelected++;
        whereClause.append("("); //$NON-NLS-1$
        whereClause.append(columnNames[i]);
        whereClause.append(" = "); //$NON-NLS-1$
        if (adapter != null && metadata != null)
          whereClause.append(adapter.quote(values[i].getText(), metadata.getColumnType(columnNames[i])));
        else
          whereClause.append(values[i].getText());

        whereClause.append(")"); //$NON-NLS-1$
      }
    }
    String query = "DELETE FROM " + row.getTable(); //$NON-NLS-1$
    if (numSelected > 0) {
      query += " WHERE " + whereClause.toString(); //$NON-NLS-1$
    }
    if (numSelected > 0) {
      setMessage(""); //$NON-NLS-1$
    } else {
      setMessage(Messages.getString("DeleteRowPage.WarningNoWhere")); //$NON-NLS-1$
    }
    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;
  }
}