/*
 * Copyright 2000-2010 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 org.jetbrains.android.dom.converters;

import com.android.SdkConstants;
import com.android.resources.ResourceType;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.PsiElement;
import com.intellij.util.ArrayUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.xml.*;
import com.intellij.util.xml.impl.ConvertContextFactory;
import com.intellij.util.xml.impl.DomCompletionContributor;
import org.jetbrains.android.dom.AndroidDomUtil;
import org.jetbrains.android.dom.resources.ResourceValue;
import org.jetbrains.android.facet.AndroidFacet;
import org.jetbrains.android.util.AndroidCommonUtils;
import org.jetbrains.android.util.AndroidResourceUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;

/**
 * @author coyote
 */
public class AndroidResourceReference extends AndroidResourceReferenceBase {
  private final GenericDomValue<ResourceValue> myValue;

  public AndroidResourceReference(@NotNull GenericDomValue<ResourceValue> value,
                                  @NotNull AndroidFacet facet,
                                  @NotNull ResourceValue resourceValue,
                                  @Nullable TextRange range) {
    super(value, range, resourceValue, facet);
    myValue = value;
  }

  @Override
  @NotNull
  public Object[] getVariants() {
    final Converter converter = WrappingConverter.getDeepestConverter(myValue.getConverter(), myValue);
    if (converter instanceof EnumConverter || converter == AndroidDomUtil.BOOLEAN_CONVERTER) {
      if (DomCompletionContributor.isSchemaEnumerated(getElement())) return ArrayUtil.EMPTY_OBJECT_ARRAY;
    }
    if (converter instanceof ResolvingConverter) {
      final ResolvingConverter resolvingConverter = (ResolvingConverter)converter;
      ArrayList<Object> result = new ArrayList<Object>();
      final ConvertContext convertContext = ConvertContextFactory.createConvertContext(myValue);
      for (Object variant : resolvingConverter.getVariants(convertContext)) {
        String name = converter.toString(variant, convertContext);
        if (name != null) {
          result.add(ElementPresentationManager.getInstance().createVariant(variant, name, resolvingConverter.getPsiElement(variant)));
        }
      }
      return result.toArray();
    }
    return ArrayUtil.EMPTY_OBJECT_ARRAY;
  }

  @Override
  public PsiElement handleElementRename(String newElementName) throws IncorrectOperationException {
    if (newElementName.startsWith(SdkConstants.NEW_ID_PREFIX)) {
      newElementName = AndroidResourceUtil.getResourceNameByReferenceText(newElementName);
    }
    ResourceValue value = myValue.getValue();
    assert value != null;
    final ResourceType resType = value.getType();
    if (resType != null && newElementName != null) {
      // todo: do not allow new value resource name to contain dot, because it is impossible to check if it file or value otherwise
      final String newResName = AndroidResourceUtil.XML_FILE_RESOURCE_TYPES.contains(resType) &&
                                newElementName.contains(".") // it is file
                                ? AndroidCommonUtils.getResourceName(resType.getName(), newElementName)
                                : newElementName;
      // Note: We're using value.getResourceType(), not resType.getName() here, because we want the "+" in the new name
      myValue.setValue(ResourceValue.referenceTo(value.getPrefix(), value.getPackage(), value.getResourceType(), newResName));
    }
    return myValue.getXmlTag();
  }
}