/*
 * Copyright 2010 Jon S Akhtar (Sylvanaar)
 *
 * 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.sylvanaar.idea.Lua.editor;

import com.intellij.navigation.ChooseByNameContributor;
import com.intellij.navigation.ItemPresentation;
import com.intellij.navigation.NavigationItem;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.impl.FakePsiElement;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.stubs.StubIndex;
import com.sylvanaar.idea.Lua.lang.psi.stubs.index.LuaGlobalDeclarationIndex;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by IntelliJ IDEA.
 * User: Jon S Akhtar
 * Date: 11/23/10
 * Time: 3:38 PM
 */
public class LuaGotoSymbolContributor implements ChooseByNameContributor {
    @Override
    public String[] getNames(Project project, boolean b) {
        final List<String> names = new ArrayList<String>();

        names.addAll(StubIndex.getInstance().getAllKeys(LuaGlobalDeclarationIndex.KEY, project));

        return names.toArray(new String[names.size()]);
    }


    @Override 
    public NavigationItem[] getItemsByName(String name, String pattern, Project project, boolean includeNonProjectItems) {
        GlobalSearchScope scope = includeNonProjectItems ? GlobalSearchScope.allScope(project) : GlobalSearchScope.projectScope(project);

        List<NavigationItem> symbols = new ArrayList<NavigationItem>();
        symbols.addAll(StubIndex.getInstance().get(LuaGlobalDeclarationIndex.KEY, name, project, scope));

        return symbols.toArray(new NavigationItem[symbols.size()]);
    }

    /**
     * Wraps one entry to display in "Go To Symbol" dialog.
     */
    public static class BaseNavigationItem extends FakePsiElement {

        private final PsiElement myPsiElement;
        private final String myText;
        private final Icon myIcon;

        /**
         * Creates a new display item.
         *
         * @param psiElement The PsiElement to navigate to.
         * @param text       Text to show for this element.
         * @param icon       Icon to show for this element.
         */
        public BaseNavigationItem(@NotNull PsiElement psiElement, @NotNull @NonNls String text, @Nullable Icon icon) {
            myPsiElement = psiElement;
            myText = text;
            myIcon = icon;
        }

        public PsiElement getNavigationElement() {
            return myPsiElement;
        }

        public Icon getIcon(boolean flags) {
            return myIcon;
        }

        public ItemPresentation getPresentation() {
            return new ItemPresentation() {

                public String getPresentableText() {
                    return myText;
                }

                @Nullable
                public String getLocationString() {
                    return '(' + myPsiElement.getContainingFile().getName() + ')';
                }

                @Nullable
                public Icon getIcon(boolean open) {
                    return myIcon;
                }

                @Nullable
                public TextAttributesKey getTextAttributesKey() {
                    return null;
                }
            };
        }

        public PsiElement getParent() {
            return myPsiElement.getParent();
        }

        public boolean equals(final Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;

            final BaseNavigationItem that = (BaseNavigationItem) o;

            if (myPsiElement != null ? !myPsiElement.equals(that.myPsiElement) : that.myPsiElement != null)
                return false;
            if (myText != null ? !myText.equals(that.myText) : that.myText != null) return false;

            return true;
        }

        public int hashCode() {
            int result;
            result = (myPsiElement != null ? myPsiElement.hashCode() : 0);
            result = 31 * result + (myText != null ? myText.hashCode() : 0);
            return result;
        }
    }


}