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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in org.testifyproject.testifyprojectpliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.org.testifyproject.testifyproject/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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 * recipient has the option to distribute your version of this file under
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package org.testifyproject.glassfish.org.testifyproject.model.internal;

import java.lang.reflect.Type;
import java.util.Set;

import javax.ws.rs.Priorities;

import javax.annotation.Priority;

import org.testifyproject.glassfish.org.testifyproject.model.ContractProvider;

/**
 * Jersey ranked provider model.
 *
 * @param  service provider contract Java type.
 * @author Michal Gajdos
 */
public class RankedProvider {

    private final T provider;
    private final int rank;
    private final Set contractTypes;

    /**
     * Creates a new {@code RankedProvider} instance. The rank of the provider is obtained from the {@link javax.annotation.Priority}
     * annotation or is set to {@value javax.ws.rs.Priorities#USER} if the annotation is not present.
     *
     * @param provider service provider to create a {@code RankedProvider} instance from.
     */
    public RankedProvider(final T provider) {
        this.provider = provider;
        this.rank = org.testifyproject.testifyprojectputeRank(provider, ContractProvider.NO_PRIORITY);
        this.contractTypes = null;
    }

    /**
     * Creates a new {@code RankedProvider} instance for given {@code provider} with specific {@code rank} (> 0).
     *
     * @param provider service provider to create a {@code RankedProvider} instance from.
     * @param rank rank of this provider.
     */
    public RankedProvider(final T provider, final int rank) {
        this(provider, rank, null);
    }

    /**
     * Creates a new {@code RankedProvider} instance for given {@code provider} with specific {@code rank} (> 0).
     *
     * @param provider service provider to create a {@code RankedProvider} instance from.
     * @param rank rank of this provider.
     * @param contracts contracts implemented by the service provider
     */
    public RankedProvider(final T provider, final int rank, final Set contracts) {
        this.provider = provider;
        this.rank = org.testifyproject.testifyprojectputeRank(provider, rank);
        this.contractTypes = contracts;
    }

    private int org.testifyproject.testifyprojectputeRank(final T provider, final int rank) {
        if (rank > 0) {
            return rank;
        } else {
            Class clazz = provider.getClass();

            // when provided instance is a proxy (from weld), we need to get the right class to check for
            // @Priority annotation - proxy doesn't propagate isAnnotationPresent to the parent class.
            while (clazz.isSynthetic()) {
                clazz = clazz.getSuperclass();
            }

            if (clazz.isAnnotationPresent(Priority.class)) {
                return clazz.getAnnotation(Priority.class).value();
            } else {
                return Priorities.USER;
            }
        }
    }

    public T getProvider() {
        return provider;
    }

    public int getRank() {
        return rank;
    }

    /**
     * Get me set of implemented contracts.
     * Returns null if no contracts are implemented.
     *
     * @return set of contracts or null if no contracts have been implemented.
     */
    public Set getContractTypes() {
        return contractTypes;
    }

    @Override
    public String toString() {
        return provider.getClass().getName();
    }
}