/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.eclipse.aether.deployment;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import org.eclipse.aether.RequestTrace;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.metadata.Metadata;
import org.eclipse.aether.repository.RemoteRepository;

/**
 * A request to deploy artifacts and their accompanying metadata into the a remote repository.
 *
 * @see org.eclipse.aether.RepositorySystem#deploy(org.eclipse.aether.RepositorySystemSession, DeployRequest)
 */
public final class DeployRequest {

    private Collection<Artifact> artifacts = Collections.emptyList();

    private Collection<Metadata> metadata = Collections.emptyList();

    private RemoteRepository repository;

    private RequestTrace trace;

    /**
     * Creates an uninitialized request.
     */
    public DeployRequest() {}

    /**
     * Gets the artifact to deploy.
     *
     * @return The artifacts to deploy, never {@code null}.
     */
    public Collection<Artifact> getArtifacts() {
        return artifacts;
    }

    /**
     * Sets the artifacts to deploy.
     *
     * @param artifacts The artifacts to deploy, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest setArtifacts(Collection<Artifact> artifacts) {
        if (artifacts == null) {
            this.artifacts = Collections.emptyList();
        } else {
            this.artifacts = artifacts;
        }
        return this;
    }

    /**
     * Adds the specified artifacts for deployment.
     *
     * @param artifact The artifact to add, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest addArtifact(Artifact artifact) {
        if (artifact != null) {
            if (artifacts.isEmpty()) {
                artifacts = new ArrayList<>();
            }
            artifacts.add(artifact);
        }
        return this;
    }

    /**
     * Gets the metadata to deploy.
     *
     * @return The metadata to deploy, never {@code null}.
     */
    public Collection<Metadata> getMetadata() {
        return metadata;
    }

    /**
     * Sets the metadata to deploy.
     *
     * @param metadata The metadata to deploy, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest setMetadata(Collection<Metadata> metadata) {
        if (metadata == null) {
            this.metadata = Collections.emptyList();
        } else {
            this.metadata = metadata;
        }
        return this;
    }

    /**
     * Adds the specified metadata for deployment.
     *
     * @param metadata The metadata to add, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest addMetadata(Metadata metadata) {
        if (metadata != null) {
            if (this.metadata.isEmpty()) {
                this.metadata = new ArrayList<>();
            }
            this.metadata.add(metadata);
        }
        return this;
    }

    /**
     * Gets the repository to deploy to.
     *
     * @return The repository to deploy to or {@code null} if not set.
     */
    public RemoteRepository getRepository() {
        return repository;
    }

    /**
     * Sets the repository to deploy to.
     *
     * @param repository The repository to deploy to, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest setRepository(RemoteRepository repository) {
        this.repository = repository;
        return this;
    }

    /**
     * Gets the trace information that describes the higher level request/operation in which this request is issued.
     *
     * @return The trace information about the higher level operation or {@code null} if none.
     */
    public RequestTrace getTrace() {
        return trace;
    }

    /**
     * Sets the trace information that describes the higher level request/operation in which this request is issued.
     *
     * @param trace The trace information about the higher level operation, may be {@code null}.
     * @return This request for chaining, never {@code null}.
     */
    public DeployRequest setTrace(RequestTrace trace) {
        this.trace = trace;
        return this;
    }

    @Override
    public String toString() {
        return getArtifacts() + ", " + getMetadata() + " > " + getRepository();
    }
}
