/*
 * Copyright (C) 2003-2011 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.etk.model.plugins.entity.type;

import java.util.HashMap;
import java.util.Map;

import org.etk.model.plugins.vt2.PropertyMetaType;
import org.etk.orm.plugins.bean.type.SimpleTypeProvider;
import org.etk.reflect.api.ClassTypeInfo;
import org.etk.reflect.api.TypeInfo;
import org.etk.reflect.api.TypeVariableInfo;

/**
 * Created by The eXo Platform SAS
 * Author : eXoPlatform
 *          exo@exoplatform.com
 * Jul 15, 2011  
 */
class SimpleTypeMappingImpl<I> implements SimpleTypeBinding {

  /** . */
  private static final Map<ClassTypeInfo, PropertyMetaType<?>> propertyMetaTypes;
  
  static {
    //
    Map<ClassTypeInfo, PropertyMetaType<?>> _jcrTypes = new HashMap<ClassTypeInfo, PropertyMetaType<?>>();
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.STRING.class), PropertyMetaType.STRING);
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.NAME.class), PropertyMetaType.NAME);
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.LONG.class), PropertyMetaType.LONG);
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.DOUBLE.class), PropertyMetaType.DOUBLE);
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.BOOLEAN.class), PropertyMetaType.BOOLEAN);
    _jcrTypes.put((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.DATE.class), PropertyMetaType.DATE);
    propertyMetaTypes = _jcrTypes;
  }

  /** . */
  private SimpleTypeProvider<I, ?> instance;

  /** . */
  private final PropertyMetaType<I> propertyMetaType;

  /** . */
  final ClassTypeInfo typeInfo;

  /** . */
  final TypeInfo external;

  SimpleTypeMappingImpl(ClassTypeInfo typeInfo) {
    
    // Find the right subclass
    ClassTypeInfo current = typeInfo;
    while (!current.getSuperClass().getName().equals(SimpleTypeProvider.class.getName())) {
      current = current.getSuperClass();
    }

    //
    ClassTypeInfo stp = (ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.class);
    TypeVariableInfo tvi = stp.getTypeParameters().get(1); // <E>
    TypeInfo aaa = typeInfo.resolve(tvi);
//    if (!aaa.equals(typeInfo)) {
//      throw new AssertionError(aaa + " should be equals to " + typeInfo);
//    }

    //
    PropertyMetaType aaaaa = propertyMetaTypes.get(current);

    //
    this.propertyMetaType = aaaaa;
    this.typeInfo = typeInfo;
    this.external = aaa;
  }

  SimpleTypeMappingImpl(ClassTypeInfo typeInfo, PropertyMetaType<I> propertyMetaType) {

    ClassTypeInfo stp = (ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(SimpleTypeProvider.class);
    TypeVariableInfo tvi = stp.getTypeParameters().get(1); // <E>
    TypeInfo aaa = typeInfo.resolve(tvi);

    //
    this.propertyMetaType = propertyMetaType;
    this.typeInfo = typeInfo;
    this.external = aaa;
  }

  SimpleTypeMappingImpl(Class<? extends SimpleTypeProvider<I, ?>> type, PropertyMetaType<I> propertyMetaType) {
    this((ClassTypeInfo)SimpleTypeResolver.typeDomain.resolve(type), propertyMetaType);
  }

  public PropertyMetaType<I> getPropertyMetaType() {
    return propertyMetaType;
  }

  public SimpleTypeProvider<I, ?> create() {
    if (instance == null) {
      Class type = (Class)typeInfo.unwrap();
      try {
        instance = (SimpleTypeProvider<I,?>)type.newInstance();
      }
      catch (InstantiationException e) {
        throw new AssertionError(e);
      }
      catch (IllegalAccessException e) {
        throw new AssertionError(e);
      }
    }
    return instance;
  }
}