/*
 * 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.apache.maven.scm.provider.svn.svnexe.command.update;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.apache.maven.scm.ChangeFile;
import org.apache.maven.scm.ChangeSet;
import org.apache.maven.scm.ScmFile;
import org.apache.maven.scm.ScmFileStatus;
import org.apache.maven.scm.provider.svn.svnexe.command.AbstractFileCheckingConsumer;

/**
 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
 */
public class SvnUpdateConsumer extends AbstractFileCheckingConsumer {
    private static final String UPDATED_TO_REVISION_TOKEN = "Updated to revision";

    private static final String AT_REVISION_TOKEN = "At revision";

    private static final String EXPORTED_REVISION_TOKEN = "Exported revision";

    private static final String RESTORED_TOKEN = "Restored";

    private List<ChangeSet> changeSets = new ArrayList<>();

    // ----------------------------------------------------------------------
    //
    // ----------------------------------------------------------------------

    public SvnUpdateConsumer(File workingDirectory) {
        super(workingDirectory);
    }

    // ----------------------------------------------------------------------
    // StreamConsumer Implementation
    // ----------------------------------------------------------------------

    /**
     * {@inheritDoc}
     */
    protected void parseLine(String line) {
        line = line.trim();

        String statusString = line.substring(0, 1);

        String file = line.substring(3).trim();
        // [SCM-368]
        if (file.startsWith(workingDirectory.getAbsolutePath())) {
            if (file.length() == workingDirectory.getAbsolutePath().length()) {
                file = ".";
            } else {
                file = file.substring(this.workingDirectory.getAbsolutePath().length() + 1);
            }
        }

        ScmFileStatus status;

        if (line.startsWith(UPDATED_TO_REVISION_TOKEN)) {
            String revisionString = line.substring(UPDATED_TO_REVISION_TOKEN.length() + 1, line.length() - 1);

            revision = parseInt(revisionString);

            return;
        } else if (line.startsWith(AT_REVISION_TOKEN)) {
            String revisionString = line.substring(AT_REVISION_TOKEN.length() + 1, line.length() - 1);

            revision = parseInt(revisionString);

            return;
        } else if (line.startsWith(EXPORTED_REVISION_TOKEN)) {
            String revisionString = line.substring(EXPORTED_REVISION_TOKEN.length() + 1, line.length() - 1);

            revision = parseInt(revisionString);

            return;
        } else if (line.startsWith(RESTORED_TOKEN)) {
            return;
        } else if (statusString.equals("A")) {
            status = ScmFileStatus.ADDED;
        } else if (statusString.equals("U") || statusString.equals("M")) {
            status = ScmFileStatus.UPDATED;
        } else if (statusString.equals("D")) {
            status = ScmFileStatus.DELETED;
        } else {
            // Do nothing

            return;
        }

        addFile(new ScmFile(file, status));

        List<ChangeFile> changeFiles = Arrays.asList(
                new ChangeFile[] {new ChangeFile(line, Integer.valueOf(revision).toString())});

        ChangeSet changeSet = new ChangeSet(null, null, null, changeFiles);
        changeSets.add(changeSet);
    }

    public List<ScmFile> getUpdatedFiles() {
        return getFiles();
    }

    public List<ChangeSet> getChangeSets() {
        return changeSets;
    }

    public void setChangeSets(List<ChangeSet> changeSets) {
        this.changeSets = changeSets;
    }
}
