/*
 * 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.repository;

import org.apache.maven.scm.provider.ScmProviderRepository;
import org.apache.maven.scm.provider.ScmProviderRepositoryWithHost;
import org.apache.maven.scm.provider.svn.SvnTagBranchUtils;

/**
 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
 */
public class SvnScmProviderRepository extends ScmProviderRepositoryWithHost {
    private String url;

    private String protocol;

    /**
     * The base directory for any tags. Can be relative to the repository URL or an absolute URL.
     */
    private String tagBase;

    /**
     * The base directory for any branches. Can be relative to the repository URL or an absolute URL.
     */
    private String branchBase;

    public SvnScmProviderRepository(String url) {
        parseUrl(url);

        tagBase = SvnTagBranchUtils.resolveTagBase(url);

        branchBase = SvnTagBranchUtils.resolveBranchBase(url);
    }

    public SvnScmProviderRepository(String url, String user, String password) {
        this(url);

        setUser(user);

        setPassword(password);
    }

    public String getUrl() {
        return url;
    }

    /**
     * Returns the url/directory to be used when tagging this repository.
     */
    public String getTagBase() {
        return tagBase;
    }

    /**
     * Sets the url/directory to be used when tagging this repository.
     * The TagBase is a way to override the default tag location for the
     * repository.  The default tag location is automatically determined
     * for repositories in the standard subversion layout (with /tags /branches /trunk).
     * Specify this value only if the repository is using a directory other than "/tags" for tagging.
     *
     * @param tagBase an absolute or relative url to the base directory to create tags in.
     *                URL should be in a format that svn client understands, not the scm url format.
     */
    public void setTagBase(String tagBase) {
        this.tagBase = tagBase;
    }

    /**
     * Returns the url/directory to be used when tagging this repository.
     */
    public String getBranchBase() {
        return branchBase;
    }

    /**
     * Sets the url/directory to be used when branching this repository.
     * The BranchBase is a way to override the default branch location for the
     * repository.  The default branch location is automatically determined
     * for repositories in the standard subversion layout (with /tags /branches /trunk).
     * Specify this value only if the repository is using a directory other than "/branches" for branching.
     *
     * @param branchBase an absolute or relative url to the base directory to create branch in.
     *                   URL should be in a format that svn client understands, not the scm url format.
     */
    public void setBranchBase(String branchBase) {
        this.branchBase = branchBase;
    }

    private void setProtocol(String protocol) {
        this.protocol = protocol;
    }

    /**
     * Get the protocol used in this repository (file://, http://, https://,...)
     *
     * @return the protocol
     */
    public String getProtocol() {
        return protocol;
    }

    private void parseUrl(String url) {
        if (url.startsWith("file")) {
            setProtocol("file://");
        } else if (url.startsWith("https")) {
            setProtocol("https://");
        } else if (url.startsWith("http")) {
            setProtocol("http://");
        } else if (url.startsWith("svn+")) {
            setProtocol(url.substring(0, url.indexOf("://") + 3));
        } else if (url.startsWith("svn")) {
            setProtocol("svn://");
        }

        if (getProtocol() == null) {
            return;
        }

        String urlPath = url.substring(getProtocol().length());

        int indexAt = urlPath.indexOf('@');

        // a file:// URL may contain userinfo according to RFC 8089, but our implementation is broken
        // extract user information, broken see SCM-909
        if (indexAt > 0 && !getProtocol().startsWith("svn+") && !getProtocol().equals("file://")) {
            String userPassword = urlPath.substring(0, indexAt);
            if (userPassword.indexOf(':') < 0) {
                setUser(userPassword);
            } else {
                setUser(userPassword.substring(0, userPassword.indexOf(':')));
                setPassword(userPassword.substring(userPassword.indexOf(':') + 1));
            }

            urlPath = urlPath.substring(indexAt + 1);

            this.url = getProtocol() + urlPath;
        } else {
            this.url = getProtocol() + urlPath;
        }

        if (!"file://".equals(getProtocol())) {
            int indexSlash = urlPath.indexOf('/');

            String hostPort = urlPath;

            if (indexSlash > 0) {
                hostPort = urlPath.substring(0, indexSlash);
            }

            int indexColon = hostPort.indexOf(':');

            if (indexColon > 0) {
                setHost(hostPort.substring(0, indexColon));
                setPort(Integer.parseInt(hostPort.substring(indexColon + 1)));
            } else {
                setHost(hostPort);
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    public ScmProviderRepository getParent() {
        String newUrl = getUrl().substring(getProtocol().length());

        while (newUrl.endsWith("/.")) {
            newUrl = newUrl.substring(0, newUrl.length() - 2);
        }

        while (newUrl.endsWith("/")) {
            newUrl = newUrl.substring(0, newUrl.length() - 1);
        }

        int i = newUrl.lastIndexOf('/');

        if (i < 0) {
            return null;
        }
        newUrl = newUrl.substring(0, i);

        return new SvnScmProviderRepository(getProtocol() + newUrl, getUser(), getPassword());
    }

    /**
     * {@inheritDoc}
     */
    public String getRelativePath(ScmProviderRepository ancestor) {
        if (ancestor instanceof SvnScmProviderRepository) {
            SvnScmProviderRepository svnAncestor = (SvnScmProviderRepository) ancestor;

            String path = getUrl().replaceFirst(svnAncestor.getUrl() + "/", "");

            if (!path.equals(getUrl())) {
                return path;
            }
        }
        return null;
    }

    /**
     * {@inheritDoc}
     */
    public String toString() {
        return getUrl();
    }
}
