/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.refactoring.rename.naming;

import com.intellij.ide.IdeBundle;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.refactoring.RefactoringBundle;
import com.intellij.ui.*;
import com.intellij.ui.components.panels.ValidatingComponent;
import com.intellij.ui.table.JBTable;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.List;

/**
 * @author dsl
 */
public class AutomaticUsageRenamingDialog<T> extends DialogWrapper {
  private static final Logger LOG = Logger.getInstance("#com.intellij.refactoring.rename.AutomaticRenamingDialog");
  private static final int CHECK_COLUMN = 0;
  private static final int OLD_NAME_COLUMN = 1;
  private static final int NEW_NAME_COLUMN = 2;
  private final AutomaticUsageRenamer<T> myRenamer;
  private boolean[] myShouldRename;
  private String[] myNewNames;
  private MyTableModel myTableModel;
  private JBTable myTable;
  private DocumentAdapter myCellEditorListener;
  private ValidatingComponent myValidatingComponent;

  public AutomaticUsageRenamingDialog(Project project, AutomaticUsageRenamer<T> renamer) {
    super(project, true);
    myRenamer = renamer;
    populateData();
    setTitle(myRenamer.getDialogTitle());
    setOKButtonText(IdeBundle.message("button.ok"));
    init();
  }

  private void populateData() {
    myNewNames = new String[getElementCount()];
    myShouldRename = new boolean[getElementCount()];
    for (int i = 0; i < getElementCount(); i++) {
      myNewNames[i] = myRenamer.getNewElementName(getElements().get(i));
      myShouldRename[i] = myRenamer.isCheckedInitially(getElements().get(i));
    }
  }

  @Override
  protected String getDimensionServiceKey() {
    return "#com.intellij.refactoring.rename.AutomaticRenamingDialog";
  }

  private int getElementCount() {
    return getElements().size();
  }

  @Override
  protected JComponent createNorthPanel() {
    final Box box = Box.createHorizontalBox();
    box.add(new JLabel(myRenamer.getDialogDescription()));
    box.add(Box.createHorizontalGlue());
    return box;
  }

  @Override
  public void show() {
    if (ApplicationManager.getApplication().isUnitTestMode()) return;
    super.show();
  }

  protected void handleChanges() {
    updateRenamer();

    boolean okActionEnabled = true;
    for (T element : getElements()) {
      final String errorText = getErrorText(element);
      if (errorText != null) {
        okActionEnabled = false;
      }
    }
    setOKActionEnabled(okActionEnabled);

    refreshValidatingComponent();
  }

  private void refreshValidatingComponent() {
    int selectedRow = myTable.getSelectedRow();
    if (selectedRow >= 0) {
      myValidatingComponent.setErrorText(getErrorText(getElements().get(selectedRow)));
    }
  }

  @Nullable
  private String getErrorText(T element) {
    return isChecked(element) ? myRenamer.getErrorText(element) : null;
  }

  private static SimpleTextAttributes highlightIfNeeded(SimpleTextAttributes attributes, String errorText) {
    if (errorText != null) {
      Color errorColor = SimpleTextAttributes.ERROR_ATTRIBUTES.getFgColor();
      int style = attributes.getStyle() | SimpleTextAttributes.STYLE_ITALIC | SimpleTextAttributes.STYLE_WAVED;
      return new SimpleTextAttributes(style, errorColor, errorColor);
    }
    return attributes;
  }

  @Override
  public JComponent getPreferredFocusedComponent() {
    return myTable;
  }

  @Override
  protected JComponent createCenterPanel() {
    final Box box = Box.createVerticalBox();
    setupTable();

    myTableModel.addTableModelListener(new TableModelListener() {
      @Override
      public void tableChanged(TableModelEvent e) {
        handleChanges();
      }
    });

    TableUtil.setupCheckboxColumn(myTable, CHECK_COLUMN);
    setupOldNameColumn();
    setupNewNameColumn();

    myValidatingComponent = new ValidatingComponent() {
      @Override
      protected JComponent createMainComponent() {
        return ScrollPaneFactory.createScrollPane(myTable);
      }
    };
    
    myValidatingComponent.doInitialize();

    box.add(myValidatingComponent);
    final Box buttonBox = Box.createHorizontalBox();
    buttonBox.add(Box.createHorizontalGlue());
    final JButton selectAllButton = new JButton(RefactoringBundle.message("select.all.button"));
    buttonBox.add(selectAllButton);
    buttonBox.add(Box.createHorizontalStrut(4));
    final JButton deselectAllButton = new JButton(RefactoringBundle.message("unselect.all.button"));
    buttonBox.add(deselectAllButton);
    selectAllButton.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        for (int i = 0; i < getElementCount(); i++) {
          myShouldRename[i] = true;
        }
        myTableModel.fireTableDataChanged();
      }
    });
    selectAllButton.setMnemonic('S');

    deselectAllButton.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        for (int i = 0; i < getElementCount(); i++) {
          myShouldRename[i] = false;
        }
        myTableModel.fireTableDataChanged();
      }
    });
    deselectAllButton.setMnemonic('U');
    box.add(Box.createVerticalStrut(4));
    box.add(buttonBox);
    box.add(Box.createVerticalStrut(4));

    return box;
  }

  private void setupTable() {
    myTable = new JBTable();
    myTableModel = new MyTableModel();
    myTable.setModel(myTableModel);

    myTable.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
      @Override
      public void valueChanged(ListSelectionEvent e) {
        refreshValidatingComponent();
      }
    });
    myTable.setCellSelectionEnabled(false);
    myTable.setColumnSelectionAllowed(false);
    myTable.setRowSelectionAllowed(false);
    myTable.getTableHeader().setReorderingAllowed(false);
  }

  private void setupNewNameColumn() {
    myTable.getColumnModel().getColumn(NEW_NAME_COLUMN).setCellRenderer(new ColoredTableCellRenderer() {
      @Override
      protected void customizeCellRenderer(JTable table, Object value, boolean selected, boolean hasFocus, int row, int column) {
        T element = getElements().get(row);
        String errorText = getErrorText(element);
        setToolTipText(errorText);
        append(String.valueOf(value), highlightIfNeeded(SimpleTextAttributes.REGULAR_ATTRIBUTES, errorText));
      }
    });

    final JTextField textField = new JTextField("");
    textField.setBorder(new EmptyBorder(0, 0, 0, 0));
    myTable.getColumnModel().getColumn(NEW_NAME_COLUMN).setCellEditor(new DefaultCellEditor(textField) {
      @Override
      public boolean stopCellEditing() {
        removeListener(textField);
        return super.stopCellEditing();
      }

      @Override
      public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, final int row, final int column) {
        super.getTableCellEditorComponent(table, value, isSelected, row, column);
        removeListener(textField);

        myCellEditorListener = new DocumentAdapter() {
          @Override
          protected void textChanged(DocumentEvent e) {
            myTableModel.setValueAt(getCellEditorValue(), row, column);
            setChecked(row, true);
            String errorText = myRenamer.getErrorText(getElements().get(row));
            textField.setToolTipText(errorText);
            Font font = textField.getFont();
            if (errorText != null) {
              textField.setForeground(SimpleTextAttributes.ERROR_ATTRIBUTES.getFgColor());
              textField.setFont(font.deriveFont(font.getStyle() | Font.ITALIC));
            } else {
              textField.setForeground(SimpleTextAttributes.REGULAR_ATTRIBUTES.getFgColor());
              textField.setFont(font.deriveFont(font.getStyle() & (~Font.ITALIC)));
            }
            repaintTable();
          }
        };
        textField.getDocument().addDocumentListener(myCellEditorListener);
        return textField;
      }

    });
  }

  private void repaintTable() {
    myTable.invalidate();
    myTable.repaint();
  }

  private void setupOldNameColumn() {
    myTable.getColumnModel().getColumn(OLD_NAME_COLUMN).setCellRenderer(new ColoredTableCellRenderer() {
      @Override
      protected void customizeCellRenderer(JTable table, Object value, boolean selected, boolean hasFocus, int row, int column) {
        //noinspection unchecked
        T element = (T) value;
        setToolTipText(getErrorText(element));
        append(myRenamer.getName(element), SimpleTextAttributes.REGULAR_ATTRIBUTES);
        String sourceName = myRenamer.getSourceName(element);
        if (sourceName != null) {
          append(" (" + sourceName + ")", makeItalic(SimpleTextAttributes.GRAYED_ATTRIBUTES));
        }
      }
    });
  }

  private void removeListener(JTextField textField) {
    if (myCellEditorListener != null) {
      textField.getDocument().removeDocumentListener(myCellEditorListener);
    }
  }

  private static SimpleTextAttributes makeItalic(SimpleTextAttributes attributes) {
    return new SimpleTextAttributes(SimpleTextAttributes.STYLE_ITALIC | attributes.getStyle(), attributes.getFgColor(), attributes.getWaveColor());
  }

  @Override
  protected void doOKAction() {
    TableUtil.stopEditing(myTable);
    handleChanges();
    super.doOKAction();
  }

  private void updateRenamer() {
    for (int i = 0; i < getElementCount(); i++) {
      T element = getElements().get(i);
      if (myShouldRename[i]) {
        myRenamer.setRename(element, myNewNames[i]);
      }
      else {
        myRenamer.doNotRename(element);
      }
    }
  }

  protected void setChecked(int rowIndex, boolean checked) {
    myTableModel.setValueAt(checked, rowIndex, CHECK_COLUMN);
  }

  protected String[] getNewNames() {
    return myNewNames;
  }

  protected void setChecked(T element, boolean checked) {
    setChecked(getElements().indexOf(element), checked);
  }

  private List<? extends T> getElements() {
    return myRenamer.getElements();
  }

  protected boolean isChecked(T element) {
    return myShouldRename[getElements().indexOf(element)];
  }

  private class MyTableModel extends AbstractTableModel {
    public MyTableModel() {
      InputMap inputMap = myTable.getInputMap();
      inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), "enable_disable");
      myTable.getActionMap().put("enable_disable", new MySpaceAction());
      inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "enter");
      myTable.getActionMap().put("enter", new EnterAction());
    }

    @Override
    public int getColumnCount() {
      return 3;
    }

    @Override
    public int getRowCount() {
      return getElementCount();
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
      switch(columnIndex) {
        case CHECK_COLUMN:
          return myShouldRename[rowIndex];
        case OLD_NAME_COLUMN:
          return getElements().get(rowIndex);
        case NEW_NAME_COLUMN:
          return myNewNames[rowIndex];
        default:
          LOG.assertTrue(false);
          return null;
      }
    }

    @Override
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
      switch(columnIndex) {
        case CHECK_COLUMN:
          myShouldRename[rowIndex] = (Boolean) aValue;
          break;
        case NEW_NAME_COLUMN:
          myNewNames[rowIndex] = (String) aValue;
          break;
        default:
          LOG.assertTrue(false);
      }
      handleChanges();
      repaintTable();
    }

    @Override
    public boolean isCellEditable(int rowIndex, int columnIndex) {
      return columnIndex != OLD_NAME_COLUMN;
    }

    @Override
    @Nullable
    public Class getColumnClass(int columnIndex) {
      switch(columnIndex) {
        case CHECK_COLUMN: return Boolean.class;
        case OLD_NAME_COLUMN: return String.class;
        case NEW_NAME_COLUMN: return String.class;
        default: return null;
      }
    }

    @Override
    public String getColumnName(int column) {
      switch(column) {
        case OLD_NAME_COLUMN:
          return RefactoringBundle.message("automatic.renamer.enity.name.column", myRenamer.getEntityName());
        case NEW_NAME_COLUMN:
          return RefactoringBundle.message("automatic.renamer.rename.to.column");
        default:
          return " ";
      }
    }

    private class MySpaceAction extends AbstractAction {
      @Override
      public void actionPerformed(ActionEvent e) {
        if (myTable.isEditing()) return;

        int row = myTable.getSelectionModel().getAnchorSelectionIndex();
        if (row >= 0 && row < getElementCount()) {
          myShouldRename[row] = !myShouldRename[row];
          fireTableDataChanged();
          repaintTable();
          myTable.requestFocus();
        }
      }
    }

    private class EnterAction extends AbstractAction {
      @Override
      public void actionPerformed(ActionEvent e) {
        if (!myTable.isEditing()) {
          doOKAction();
        }
      }
    }
  }


}