/*
  GRANITE DATA SERVICES
  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.

  This file is part of Granite Data Services.

  Granite Data Services is free software; you can redistribute it and/or modify
  it under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  Granite Data Services 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 Library General Public License
  for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; if not, see <http://www.gnu.org/licenses/>.
*/

package org.granite.generator.as3.reflect;

import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.granite.generator.as3.ClientType;
import org.granite.generator.as3.PropertyType;
import org.granite.messaging.annotations.Include;
import org.granite.util.ClassUtil;

/**
 * @author Franck WOLFF
 */
public class JavaMethodProperty implements JavaProperty {

    private final String name;
    private final JavaMethod readMethod;
    private final JavaMethod writeMethod;
    private final Class<?> type;
    private final Type genericType;
    private final ClientType clientType;
    private final boolean externalizedProperty;

    public JavaMethodProperty(JavaTypeFactory provider, String name, JavaMethod readMethod, JavaMethod writeMethod) {
        this(provider, name, readMethod, writeMethod, null);
    }
    
    public JavaMethodProperty(JavaTypeFactory provider, String name, JavaMethod readMethod, JavaMethod writeMethod, ParameterizedType declaringType) {
        if (name == null || (readMethod == null && writeMethod == null))
            throw new NullPointerException("Invalid parameters");
        this.name = name;
        this.readMethod = readMethod;
        this.writeMethod = writeMethod;
        Type genericType = (
            readMethod != null ?
            readMethod.getMember().getGenericReturnType() :
            writeMethod.getMember().getGenericParameterTypes()[0]
        );
        Class<?> declaringClass = readMethod != null ? readMethod.getMember().getDeclaringClass() : writeMethod.getMember().getDeclaringClass();
        if (genericType instanceof TypeVariable && declaringType != null) {
                int index = -1;
                for (int i = 0; i < declaringClass.getTypeParameters().length; i++) {
                        if (declaringClass.getTypeParameters()[i] == genericType) {
                                index = i;
                                break;
                        }
                }
                if (index >= 0 && index < declaringType.getActualTypeArguments().length)
                        genericType = declaringType.getActualTypeArguments()[index];
        }
        this.type = ClassUtil.classOfType(genericType);
        this.genericType = genericType;
        ClientType clientType = provider.getClientType(genericType, null, null, isWritable() ? PropertyType.PROPERTY : PropertyType.READONLY_PROPERTY);
        if (clientType == null)
                clientType = provider.getAs3Type(type);
        this.clientType = clientType;
        this.externalizedProperty = (
                readMethod != null &&
                ClassUtil.isAnnotationPresent(readMethod.getMember(), Include.class)
        );
    }

    @Override
        public String getName() {
        return name;
    }
    
    @Override
        public String getCapitalizedName() {
        return getName().substring(0, 1).toUpperCase() + getName().substring(1);
    }

    @Override
        public Class<?> getType() {
        return type;
    }
    
    public Type getGenericType() {
        return genericType;
    }
    
    @Override
        public Type[] getGenericTypes() {
                Type type = readMethod != null ? readMethod.getMember().getGenericReturnType() : writeMethod.getMember().getGenericParameterTypes()[0];
                if (!(type instanceof ParameterizedType))
                        return null;
                return ((ParameterizedType)type).getActualTypeArguments();
    }

    @Override
        public boolean isReadable() {
        return (readMethod != null);
    }

    @Override
        public boolean isWritable() {
        return (writeMethod != null);
    }

    @Override
        public boolean isExternalizedProperty() {
        return externalizedProperty;
    }

    @Override
        public boolean isEnum() {
                return (type.isEnum() || Enum.class.getName().equals(type.getName()));
        }

        @Override
        public boolean isAnnotationPresent(Class<? extends Annotation> annotationClass) {
        return (
            (readMethod != null && readMethod.getMember().isAnnotationPresent(annotationClass)) ||
            (writeMethod != null && writeMethod.getMember().isAnnotationPresent(annotationClass))
        );
    }

    @Override
        public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
        T annotation = null;
        if (readMethod != null) {
                annotation = readMethod.getMember().getAnnotation(annotationClass);
                if (annotation != null)
                        return annotation;
        }
        if (writeMethod != null) {
                annotation = writeMethod.getMember().getAnnotation(annotationClass);
                if (annotation != null)
                        return annotation;
        }
        return null;
    }
    
    @Override
        public Annotation[] getDeclaredAnnotations() {
        List<Annotation> annos = new ArrayList<Annotation>();
        if (readMethod != null)
                annos.addAll(Arrays.asList(readMethod.getMember().getDeclaredAnnotations()));
        if (writeMethod != null)
                annos.addAll(Arrays.asList(writeMethod.getMember().getDeclaredAnnotations()));
        return annos.toArray(new Annotation[0]);
    }

    @Override
        public boolean isReadOverride() {
        return (readMethod != null && readMethod.isOverride());
    }

    @Override
        public boolean isWriteOverride() {
        return (writeMethod != null && writeMethod.isOverride());
    }

    @Override
        public JavaMethod getReadMethod() {
        return readMethod;
    }

    @Override
        public JavaMethod getWriteMethod() {
        return writeMethod;
    }

    public ClientType getAs3Type() {
        return clientType;
    }

    @Override
        public ClientType getClientType() {
        return clientType;
    }

    @Override
        public int compareTo(JavaProperty o) {
        return name.compareTo(o.getName());
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj instanceof JavaMethodProperty)
            return ((JavaMethodProperty)obj).name.equals(name);
        return false;
    }

    @Override
    public int hashCode() {
        return name.hashCode();
    }
}