package net.sourceforge.phpeclipse.xdebug.ui;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.debug.ui.StringVariableSelectionDialog;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
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.Control;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class MultipleInputDialog extends Dialog {
	protected static final String FIELD_NAME = "FIELD_NAME"; //$NON-NLS-1$

	protected static final int TEXT = 100;

	protected static final int BROWSE = 101;

	protected static final int VARIABLE = 102;

	protected Composite panel;

	protected List fieldList = new ArrayList();

	protected List controlList = new ArrayList();

	protected List validators = new ArrayList();

	protected Map valueMap = new HashMap();

	private String title;

	public MultipleInputDialog(Shell shell, String title) {
		super(shell);
		this.title = title;
		setShellStyle(getShellStyle() | SWT.RESIZE);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
	 */
	protected void configureShell(Shell shell) {
		super.configureShell(shell);
		if (title != null) {
			shell.setText(title);
		}

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#createButtonBar(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createButtonBar(Composite parent) {
		Control bar = super.createButtonBar(parent);
		validateFields();
		return bar;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createDialogArea(Composite parent) {
		Composite container = (Composite) super.createDialogArea(parent);
		container.setLayout(new GridLayout(2, false));
		container.setLayoutData(new GridData(GridData.FILL_BOTH));

		panel = new Composite(container, SWT.NONE);
		GridLayout layout = new GridLayout(2, false);
		panel.setLayout(layout);
		panel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		for (Iterator i = fieldList.iterator(); i.hasNext();) {
			FieldSummary field = (FieldSummary) i.next();
			switch (field.type) {
			case TEXT:
				createTextField(field.name, field.initialValue,
						field.allowsEmpty);
				break;
			case BROWSE:
				createBrowseField(field.name, field.initialValue,
						field.allowsEmpty);
				break;
			case VARIABLE:
				createVariablesField(field.name, field.initialValue,
						field.allowsEmpty);
				break;
			}
		}

		fieldList = null; // allow it to be gc'd
		Dialog.applyDialogFont(container);
		return container;
	}

	public void addBrowseField(String labelText, String initialValue,
			boolean allowsEmpty) {
		fieldList.add(new FieldSummary(BROWSE, labelText, initialValue,
				allowsEmpty));
	}

	public void addTextField(String labelText, String initialValue,
			boolean allowsEmpty) {
		fieldList.add(new FieldSummary(TEXT, labelText, initialValue,
				allowsEmpty));
	}

	public void addVariablesField(String labelText, String initialValue,
			boolean allowsEmpty) {
		fieldList.add(new FieldSummary(VARIABLE, labelText, initialValue,
				allowsEmpty));
	}

	protected void createTextField(String labelText, String initialValue,
			boolean allowEmpty) {
		Label label = new Label(panel, SWT.NONE);
		label.setText(labelText);
		label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING));

		final Text text = new Text(panel, SWT.SINGLE | SWT.BORDER);
		text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		text.setData(FIELD_NAME, labelText);

		// make sure rows are the same height on both panels.
		label.setSize(label.getSize().x, text.getSize().y);

		if (initialValue != null) {
			text.setText(initialValue);
		}

		if (!allowEmpty) {
			validators.add(new Validator() {
				public boolean validate() {
					return !text.getText().equals(""); //$NON-NLS-1$
				}
			});
			text.addModifyListener(new ModifyListener() {
				public void modifyText(ModifyEvent e) {
					validateFields();
				}
			});
		}

		controlList.add(text);
	}

	protected void createBrowseField(String labelText, String initialValue,
			boolean allowEmpty) {
		Label label = new Label(panel, SWT.NONE);
		label.setText(labelText);
		label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING));

		Composite comp = new Composite(panel, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		comp.setLayout(layout);
		comp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		final Text text = new Text(comp, SWT.SINGLE | SWT.BORDER);
		GridData data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = 200;
		text.setLayoutData(data);
		text.setData(FIELD_NAME, labelText);

		// make sure rows are the same height on both panels.
		label.setSize(label.getSize().x, text.getSize().y);

		if (initialValue != null) {
			text.setText(initialValue);
		}

		if (!allowEmpty) {
			validators.add(new Validator() {
				public boolean validate() {
					return !text.getText().equals(""); //$NON-NLS-1$
				}
			});

			text.addModifyListener(new ModifyListener() {
				public void modifyText(ModifyEvent e) {
					validateFields();
				}
			});
		}

		Button button = createButton(comp, IDialogConstants.IGNORE_ID,
				"&Browse...", false);
		button.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				DirectoryDialog dialog = new DirectoryDialog(getShell());
				dialog.setMessage("Select a file:");
				String currentWorkingDir = text.getText();
				if (!currentWorkingDir.trim().equals("")) { //$NON-NLS-1$
					File path = new File(currentWorkingDir);
					if (path.exists()) {
						dialog.setFilterPath(currentWorkingDir);
					}
				}

				String selectedDirectory = dialog.open();
				if (selectedDirectory != null) {
					text.setText(selectedDirectory);
				}
			}
		});

		controlList.add(text);

	}

	public void createVariablesField(String labelText, String initialValue,
			boolean allowEmpty) {
		Label label = new Label(panel, SWT.NONE);
		label.setText(labelText);
		label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING));

		Composite comp = new Composite(panel, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		comp.setLayout(layout);
		comp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		final Text text = new Text(comp, SWT.SINGLE | SWT.BORDER);
		GridData data = new GridData(GridData.FILL_HORIZONTAL);
		data.widthHint = 200;
		text.setLayoutData(data);
		text.setData(FIELD_NAME, labelText);

		// make sure rows are the same height on both panels.
		label.setSize(label.getSize().x, text.getSize().y);

		if (initialValue != null) {
			text.setText(initialValue);
		}

		if (!allowEmpty) {
			validators.add(new Validator() {
				public boolean validate() {
					return !text.getText().equals(""); //$NON-NLS-1$
				}
			});

			text.addModifyListener(new ModifyListener() {
				public void modifyText(ModifyEvent e) {
					validateFields();
				}
			});
		}

		Button button = createButton(comp, IDialogConstants.IGNORE_ID,
				"Varia&bles...", false);
		button.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				StringVariableSelectionDialog dialog = new StringVariableSelectionDialog(
						getShell());
				int code = dialog.open();
				if (code == IDialogConstants.OK_ID) {
					String variable = dialog.getVariableExpression();
					if (variable != null) {
						text.insert(variable);
					}
				}
			}
		});

		controlList.add(text);

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()
	 */
	protected void okPressed() {
		for (Iterator i = controlList.iterator(); i.hasNext();) {
			Control control = (Control) i.next();
			if (control instanceof Text) {
				valueMap.put(control.getData(FIELD_NAME), ((Text) control)
						.getText());
			}
		}
		controlList = null;
		super.okPressed();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.window.Window#open()
	 */
	public int open() {
		applyDialogFont(panel);
		return super.open();
	}

	public Object getValue(String key) {
		return valueMap.get(key);
	}

	public String getStringValue(String key) {
		return (String) getValue(key);
	}

	public void validateFields() {
		for (Iterator i = validators.iterator(); i.hasNext();) {
			Validator validator = (Validator) i.next();
			if (!validator.validate()) {
				getButton(IDialogConstants.OK_ID).setEnabled(false);
				return;
			}
		}
		getButton(IDialogConstants.OK_ID).setEnabled(true);
	}

	// /* (non-Javadoc)
	// * @see
	// org.eclipse.jface.window.Window#getInitialLocation(org.eclipse.swt.graphics.Point)
	// */
	// protected Point getInitialLocation(Point initialSize) {
	// Point initialLocation=
	// DialogSettingsHelper.getInitialLocation(getDialogSettingsSectionName());
	// if (initialLocation != null) {
	// return initialLocation;
	// }
	// return super.getInitialLocation(initialSize);
	// }

	protected String getDialogSettingsSectionName() {
		return IDebugUIConstants.PLUGIN_ID + ".MULTIPLE_INPUT_DIALOG_2"; //$NON-NLS-1$
	}

	// /* (non-Javadoc)
	// * @see org.eclipse.jface.window.Window#getInitialSize()
	// */
	// protected Point getInitialSize() {
	// Point size = super.getInitialSize();
	// return
	// DialogSettingsHelper.getInitialSize(getDialogSettingsSectionName(),
	// size);
	// }

	// /* (non-Javadoc)
	// * @see org.eclipse.jface.window.Window#close()
	// */
	// public boolean close() {
	// DialogSettingsHelper.persistShellGeometry(getShell(),
	// getDialogSettingsSectionName());
	// return super.close();
	// }

	protected class FieldSummary {
		int type;

		String name;

		String initialValue;

		boolean allowsEmpty;

		public FieldSummary(int type, String name, String initialValue,
				boolean allowsEmpty) {
			this.type = type;
			this.name = name;
			this.initialValue = initialValue;
			this.allowsEmpty = allowsEmpty;
		}
	}

	protected class Validator {
		boolean validate() {
			return true;
		}
	}

}