/*
 * Copyright 2000-2014 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.plugins.groovy.geb;

import com.intellij.psi.*;
import com.intellij.psi.scope.PsiScopeProcessor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrField;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrMethodCall;
import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.ClassUtil;
import org.jetbrains.plugins.groovy.lang.resolve.NonCodeMembersContributor;
import org.jetbrains.plugins.groovy.lang.resolve.ResolveUtil;
import org.jetbrains.plugins.groovy.lang.resolve.processors.ClassHint;

import java.util.Map;

/**
 * @author Sergey Evdokimov
 */
public class GebPageMemberContributor extends NonCodeMembersContributor {

  @Override
  protected String getParentClassName() {
    return "geb.Page";
  }

  @Override
  public void processDynamicElements(@NotNull PsiType qualifierType,
                                     PsiClass aClass,
                                     @NotNull PsiScopeProcessor processor,
                                     @NotNull PsiElement place,
                                     @NotNull ResolveState state) {
    ClassHint classHint = processor.getHint(ClassHint.KEY);
    if (classHint != null && !classHint.shouldProcess(ClassHint.ResolveKind.PROPERTY)) return;

    PsiElement grCall = place.getParent();
    if (grCall instanceof GrMethodCall) {
      PsiElement grClosure = grCall.getParent();
      if (grClosure instanceof GrClosableBlock) {
        PsiElement contentField = grClosure.getParent();
        if (contentField instanceof GrField) {
          GrField f = (GrField)contentField;
          if ("content".equals(f.getName()) && f.hasModifierProperty(PsiModifier.STATIC) && f.getContainingClass() == aClass) {
            Map<String, PsiField> elements = GebUtil.getContentElements(aClass);
            for (PsiField field : elements.values()) {
              if (field.getNavigationElement() == place) {
                return; // Don't resolve variable definition.
              }
            }
          }
        }
      }
    }

    processPageFields(processor, aClass, state);
  }

  public static boolean processPageFields(PsiScopeProcessor processor,
                                          @NotNull PsiClass pageClass,
                                          ResolveState state) {
    Map<String, PsiClass> supers = ClassUtil.getSuperClassesWithCache(pageClass);
    String nameHint = ResolveUtil.getNameHint(processor);

    for (PsiClass psiClass : supers.values()) {
      Map<String, PsiField> contentFields = GebUtil.getContentElements(psiClass);

      if (nameHint == null) {
        for (Map.Entry<String, PsiField> entry : contentFields.entrySet()) {
          if (!processor.execute(entry.getValue(), state)) return false;
        }
      }
      else {
        PsiField field = contentFields.get(nameHint);
        if (field != null) {
          return processor.execute(field, state);
        }
      }
    }

    return true;
  }
}