/*
 * Copyright (C) 2010, Chris Aniszczyk <caniszczyk@gmail.com>
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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package org.eclipse.jgit.api;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URISyntaxException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.InvalidRemoteException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.errors.NotSupportedException;
import org.eclipse.jgit.errors.TooLargeObjectInPackException;
import org.eclipse.jgit.errors.TooLargePackException;
import org.eclipse.jgit.errors.TransportException;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.ProgressMonitor;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.PushResult;
import org.eclipse.jgit.transport.RefLeaseSpec;
import org.eclipse.jgit.transport.RefSpec;
import org.eclipse.jgit.transport.RemoteConfig;
import org.eclipse.jgit.transport.RemoteRefUpdate;
import org.eclipse.jgit.transport.Transport;

A class used to execute a Push command. It has setters for all supported options and arguments of this command and a call() method to finally execute the command. 
See Also:
Git documentation about Push/**
 * A class used to execute a {@code Push} command. It has setters for all
 * supported options and arguments of this command and a {@link #call()} method
 * to finally execute the command.
 *
 * @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-push.html"
 *      >Git documentation about Push</a>
 */
public class PushCommand extends
		TransportCommand<PushCommand, Iterable<PushResult>> {

	private String remote = Constants.DEFAULT_REMOTE_NAME;

	private final List<RefSpec> refSpecs;

	private final Map<String, RefLeaseSpec> refLeaseSpecs;

	private ProgressMonitor monitor = NullProgressMonitor.INSTANCE;

	private String receivePack = RemoteConfig.DEFAULT_RECEIVE_PACK;

	private boolean dryRun;
	private boolean atomic;
	private boolean force;
	private boolean thin = Transport.DEFAULT_PUSH_THIN;

	private OutputStream out;

	private List<String> pushOptions;

	

Constructor for PushCommand.

Params:
repo –  the Repository/**
	 * <p>
	 * Constructor for PushCommand.
	 * </p>
	 *
	 * @param repo
	 *            the {@link org.eclipse.jgit.lib.Repository}
	 */
	protected PushCommand(Repository repo) {
		super(repo);
		refSpecs = new ArrayList<>(3);
		refLeaseSpecs = new HashMap<>();
	}

	
{@inheritDoc}
 Execute the push command with all the options and parameters collected by the setter methods of this class. Each instance of this class should only be used for one invocation of the command (means: one call to call()) /**
	 * {@inheritDoc}
	 * <p>
	 * Execute the {@code push} command with all the options and parameters
	 * collected by the setter methods of this class. Each instance of this
	 * class should only be used for one invocation of the command (means: one
	 * call to {@link #call()})
	 */
	@Override
	public Iterable<PushResult> call() throws GitAPIException,
			InvalidRemoteException,
			org.eclipse.jgit.api.errors.TransportException {
		checkCallable();

		ArrayList<PushResult> pushResults = new ArrayList<>(3);

		try {
			if (refSpecs.isEmpty()) {
				RemoteConfig config = new RemoteConfig(repo.getConfig(),
						getRemote());
				refSpecs.addAll(config.getPushRefSpecs());
			}
			if (refSpecs.isEmpty()) {
				Ref head = repo.exactRef(Constants.HEAD);
				if (head != null && head.isSymbolic())
					refSpecs.add(new RefSpec(head.getLeaf().getName()));
			}

			if (force) {
				for (int i = 0; i < refSpecs.size(); i++)
					refSpecs.set(i, refSpecs.get(i).setForceUpdate(true));
			}

			final List<Transport> transports;
			transports = Transport.openAll(repo, remote, Transport.Operation.PUSH);
			for (@SuppressWarnings("resource") // Explicitly closed in finally
					final Transport transport : transports) {
				transport.setPushThin(thin);
				transport.setPushAtomic(atomic);
				if (receivePack != null)
					transport.setOptionReceivePack(receivePack);
				transport.setDryRun(dryRun);
				transport.setPushOptions(pushOptions);
				configure(transport);

				final Collection<RemoteRefUpdate> toPush = transport
						.findRemoteRefUpdatesFor(refSpecs, refLeaseSpecs);

				try {
					PushResult result = transport.push(monitor, toPush, out);
					pushResults.add(result);

				} catch (TooLargePackException e) {
					throw new org.eclipse.jgit.api.errors.TooLargePackException(
							e.getMessage(), e);
				} catch (TooLargeObjectInPackException e) {
					throw new org.eclipse.jgit.api.errors.TooLargeObjectInPackException(
							e.getMessage(), e);
				} catch (TransportException e) {
					throw new org.eclipse.jgit.api.errors.TransportException(
							e.getMessage(), e);
				} finally {
					transport.close();
				}
			}

		} catch (URISyntaxException e) {
			throw new InvalidRemoteException(MessageFormat.format(
					JGitText.get().invalidRemote, remote));
		} catch (TransportException e) {
			throw new org.eclipse.jgit.api.errors.TransportException(
					e.getMessage(), e);
		} catch (NotSupportedException e) {
			throw new JGitInternalException(
					JGitText.get().exceptionCaughtDuringExecutionOfPushCommand,
					e);
		} catch (IOException e) {
			throw new JGitInternalException(
					JGitText.get().exceptionCaughtDuringExecutionOfPushCommand,
					e);
		}

		return pushResults;
	}

	
The remote (uri or name) used for the push operation. If no remote is
set, the default value of Constants.DEFAULT_REMOTE_NAME will
be used.
Params:
remote – 
           the remote name
See Also:
DEFAULT_REMOTE_NAME.DEFAULT_REMOTE_NAME
Returns:
this/**
	 * The remote (uri or name) used for the push operation. If no remote is
	 * set, the default value of <code>Constants.DEFAULT_REMOTE_NAME</code> will
	 * be used.
	 *
	 * @see Constants#DEFAULT_REMOTE_NAME
	 * @param remote
	 *            the remote name
	 * @return {@code this}
	 */
	public PushCommand setRemote(String remote) {
		checkCallable();
		this.remote = remote;
		return this;
	}

	
Get remote name
Returns:
the remote used for the remote operation/**
	 * Get remote name
	 *
	 * @return the remote used for the remote operation
	 */
	public String getRemote() {
		return remote;
	}

	
The remote executable providing receive-pack service for pack transports.
If no receive-pack is set, the default value of
RemoteConfig.DEFAULT_RECEIVE_PACK will be used.
Params:
receivePack – 
           name of the remote executable providing the receive-pack
           service
See Also:
DEFAULT_RECEIVE_PACK.DEFAULT_RECEIVE_PACK
Returns:
this/**
	 * The remote executable providing receive-pack service for pack transports.
	 * If no receive-pack is set, the default value of
	 * <code>RemoteConfig.DEFAULT_RECEIVE_PACK</code> will be used.
	 *
	 * @see RemoteConfig#DEFAULT_RECEIVE_PACK
	 * @param receivePack
	 *            name of the remote executable providing the receive-pack
	 *            service
	 * @return {@code this}
	 */
	public PushCommand setReceivePack(String receivePack) {
		checkCallable();
		this.receivePack = receivePack;
		return this;
	}

	
Get the name of the remote executable providing the receive-pack service
Returns:
the receive-pack used for the remote operation/**
	 * Get the name of the remote executable providing the receive-pack service
	 *
	 * @return the receive-pack used for the remote operation
	 */
	public String getReceivePack() {
		return receivePack;
	}

	
Get timeout used for push operation
Returns:
the timeout used for the push operation/**
	 * Get timeout used for push operation
	 *
	 * @return the timeout used for the push operation
	 */
	public int getTimeout() {
		return timeout;
	}

	
Get the progress monitor
Returns:
the progress monitor for the push operation/**
	 * Get the progress monitor
	 *
	 * @return the progress monitor for the push operation
	 */
	public ProgressMonitor getProgressMonitor() {
		return monitor;
	}

	
The progress monitor associated with the push operation. By default, this
is set to NullProgressMonitor
Params:
monitor –  a ProgressMonitor
See Also:
NullProgressMonitor
Returns:
this/**
	 * The progress monitor associated with the push operation. By default, this
	 * is set to <code>NullProgressMonitor</code>
	 *
	 * @see NullProgressMonitor
	 * @param monitor
	 *            a {@link org.eclipse.jgit.lib.ProgressMonitor}
	 * @return {@code this}
	 */
	public PushCommand setProgressMonitor(ProgressMonitor monitor) {
		checkCallable();
		if (monitor == null) {
			monitor = NullProgressMonitor.INSTANCE;
		}
		this.monitor = monitor;
		return this;
	}

	
Get the RefLeaseSpecs.
Returns:
the RefLeaseSpecs
Since:
4.7/**
	 * Get the <code>RefLeaseSpec</code>s.
	 *
	 * @return the <code>RefLeaseSpec</code>s
	 * @since 4.7
	 */
	public List<RefLeaseSpec> getRefLeaseSpecs() {
		return new ArrayList<>(refLeaseSpecs.values());
	}

	
The ref lease specs to be used in the push operation, for a
force-with-lease push operation.
Params:
specs –  a RefLeaseSpec object.
Returns:
this
Since:
4.7/**
	 * The ref lease specs to be used in the push operation, for a
	 * force-with-lease push operation.
	 *
	 * @param specs
	 *            a {@link org.eclipse.jgit.transport.RefLeaseSpec} object.
	 * @return {@code this}
	 * @since 4.7
	 */
	public PushCommand setRefLeaseSpecs(RefLeaseSpec... specs) {
		return setRefLeaseSpecs(Arrays.asList(specs));
	}

	
The ref lease specs to be used in the push operation, for a
force-with-lease push operation.
Params:
specs –  list of RefLeaseSpecs
Returns:
this
Since:
4.7/**
	 * The ref lease specs to be used in the push operation, for a
	 * force-with-lease push operation.
	 *
	 * @param specs
	 *            list of {@code RefLeaseSpec}s
	 * @return {@code this}
	 * @since 4.7
	 */
	public PushCommand setRefLeaseSpecs(List<RefLeaseSpec> specs) {
		checkCallable();
		this.refLeaseSpecs.clear();
		for (RefLeaseSpec spec : specs) {
			refLeaseSpecs.put(spec.getRef(), spec);
		}
		return this;
	}

	
Get RefSpecs. 
Returns:
the ref specs/**
	 * Get {@code RefSpec}s.
	 *
	 * @return the ref specs
	 */
	public List<RefSpec> getRefSpecs() {
		return refSpecs;
	}

	
The ref specs to be used in the push operation
Params:
specs – a RefSpec object.
Returns:
this/**
	 * The ref specs to be used in the push operation
	 *
	 * @param specs a {@link org.eclipse.jgit.transport.RefSpec} object.
	 * @return {@code this}
	 */
	public PushCommand setRefSpecs(RefSpec... specs) {
		checkCallable();
		this.refSpecs.clear();
		Collections.addAll(refSpecs, specs);
		return this;
	}

	
The ref specs to be used in the push operation
Params:
specs –  list of RefSpecs
Returns:
this/**
	 * The ref specs to be used in the push operation
	 *
	 * @param specs
	 *            list of {@link org.eclipse.jgit.transport.RefSpec}s
	 * @return {@code this}
	 */
	public PushCommand setRefSpecs(List<RefSpec> specs) {
		checkCallable();
		this.refSpecs.clear();
		this.refSpecs.addAll(specs);
		return this;
	}

	
Push all branches under refs/heads/*.
Returns:
{code this}/**
	 * Push all branches under refs/heads/*.
	 *
	 * @return {code this}
	 */
	public PushCommand setPushAll() {
		refSpecs.add(Transport.REFSPEC_PUSH_ALL);
		return this;
	}

	
Push all tags under refs/tags/*.
Returns:
{code this}/**
	 * Push all tags under refs/tags/*.
	 *
	 * @return {code this}
	 */
	public PushCommand setPushTags() {
		refSpecs.add(Transport.REFSPEC_TAGS);
		return this;
	}

	
Add a reference to push.
Params:
ref – 
           the source reference. The remote name will match.
Returns:
this./**
	 * Add a reference to push.
	 *
	 * @param ref
	 *            the source reference. The remote name will match.
	 * @return {@code this}.
	 */
	public PushCommand add(Ref ref) {
		refSpecs.add(new RefSpec(ref.getLeaf().getName()));
		return this;
	}

	
Add a reference to push.
Params:
nameOrSpec – 
           any reference name, or a reference specification.
Throws:
JGitInternalException – 
            the reference name cannot be resolved.
Returns:
this./**
	 * Add a reference to push.
	 *
	 * @param nameOrSpec
	 *            any reference name, or a reference specification.
	 * @return {@code this}.
	 * @throws JGitInternalException
	 *             the reference name cannot be resolved.
	 */
	public PushCommand add(String nameOrSpec) {
		if (0 <= nameOrSpec.indexOf(':')) {
			refSpecs.add(new RefSpec(nameOrSpec));
		} else {
			Ref src;
			try {
				src = repo.findRef(nameOrSpec);
			} catch (IOException e) {
				throw new JGitInternalException(
						JGitText.get().exceptionCaughtDuringExecutionOfPushCommand,
						e);
			}
			if (src != null)
				add(src);
		}
		return this;
	}

	
Whether to run the push operation as a dry run
Returns:
the dry run preference for the push operation/**
	 * Whether to run the push operation as a dry run
	 *
	 * @return the dry run preference for the push operation
	 */
	public boolean isDryRun() {
		return dryRun;
	}

	
Sets whether the push operation should be a dry run
Params:
dryRun – a boolean.
Returns:
this/**
	 * Sets whether the push operation should be a dry run
	 *
	 * @param dryRun a boolean.
	 * @return {@code this}
	 */
	public PushCommand setDryRun(boolean dryRun) {
		checkCallable();
		this.dryRun = dryRun;
		return this;
	}

	
Get the thin-pack preference
Returns:
the thin-pack preference for push operation/**
	 * Get the thin-pack preference
	 *
	 * @return the thin-pack preference for push operation
	 */
	public boolean isThin() {
		return thin;
	}

	
Set the thin-pack preference for push operation.
Default setting is Transport.DEFAULT_PUSH_THIN
Params:
thin – 
           the thin-pack preference value
Returns:
this/**
	 * Set the thin-pack preference for push operation.
	 *
	 * Default setting is Transport.DEFAULT_PUSH_THIN
	 *
	 * @param thin
	 *            the thin-pack preference value
	 * @return {@code this}
	 */
	public PushCommand setThin(boolean thin) {
		checkCallable();
		this.thin = thin;
		return this;
	}

	
Whether this push should be executed atomically (all references updated,
or none)
Returns:
true if all-or-nothing behavior is requested.
Since:
4.2/**
	 * Whether this push should be executed atomically (all references updated,
	 * or none)
	 *
	 * @return true if all-or-nothing behavior is requested.
	 * @since 4.2
	 */
	public boolean isAtomic() {
		return atomic;
	}

	
Requests atomic push (all references updated, or no updates).
Default setting is false.
Params:
atomic – 
           whether to run the push atomically
Returns:
this
Since:
4.2/**
	 * Requests atomic push (all references updated, or no updates).
	 *
	 * Default setting is false.
	 *
	 * @param atomic
	 *            whether to run the push atomically
	 * @return {@code this}
	 * @since 4.2
	 */
	public PushCommand setAtomic(boolean atomic) {
		checkCallable();
		this.atomic = atomic;
		return this;
	}

	
Whether to push forcefully
Returns:
the force preference for push operation/**
	 * Whether to push forcefully
	 *
	 * @return the force preference for push operation
	 */
	public boolean isForce() {
		return force;
	}

	
Sets the force preference for push operation.
Params:
force – 
           whether to push forcefully
Returns:
this/**
	 * Sets the force preference for push operation.
	 *
	 * @param force
	 *            whether to push forcefully
	 * @return {@code this}
	 */
	public PushCommand setForce(boolean force) {
		checkCallable();
		this.force = force;
		return this;
	}

	
Sets the output stream to write sideband messages to
Params:
out –  an OutputStream
Returns:
this
Since:
3.0/**
	 * Sets the output stream to write sideband messages to
	 *
	 * @param out
	 *            an {@link java.io.OutputStream}
	 * @return {@code this}
	 * @since 3.0
	 */
	public PushCommand setOutputStream(OutputStream out) {
		this.out = out;
		return this;
	}

	
Get push options
Returns:
the option strings associated with the push operation
Since:
4.5/**
	 * Get push options
	 *
	 * @return the option strings associated with the push operation
	 * @since 4.5
	 */
	public List<String> getPushOptions() {
		return pushOptions;
	}

	
Set the option strings associated with the push operation.
Params:
pushOptions –  a List of push option strings
Returns:
this
Since:
4.5/**
	 * Set the option strings associated with the push operation.
	 *
	 * @param pushOptions
	 *            a {@link java.util.List} of push option strings
	 * @return {@code this}
	 * @since 4.5
	 */
	public PushCommand setPushOptions(List<String> pushOptions) {
		this.pushOptions = pushOptions;
		return this;
	}
}