/*
 * Copyright (c) 2011, 2012 Roberto Tyley
 *
 * This file is part of 'Agit' - an Android Git client.
 *
 * Agit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Agit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/ .
 */

package com.madgag.agit;

import static java.util.Arrays.asList;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.MatcherAssert.assertThat;
import android.os.Environment;
import android.util.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.InetAddress;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.util.Properties;

import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryCache;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
import org.eclipse.jgit.transport.URIish;
import org.eclipse.jgit.util.FS;

public class GitTestUtils {
    public static final String RSA_USER = "rsa_user", DSA_USER = "dsa_user";
    private static final String TAG = "GitTestUtils";

    public static String gitServerHostAddress() throws IOException, UnknownHostException {
        File hostAddressFile = new File(Environment.getExternalStorageDirectory(), "agit-integration-test.properties");
        Properties properties = new Properties();
        if (hostAddressFile.exists()) {
            properties.load(new FileInputStream(hostAddressFile));
        }
        String[] hostAddresses = properties.getProperty("gitserver.host.address", "10.0.2.2").split(",");
        for (String hostAddress : hostAddresses) {
            if (InetAddress.getByName(hostAddress).isReachable(1000)) {
                Log.d(TAG, "Using git server host : " + hostAddress);
                return hostAddress;
            }
        }
        throw new RuntimeException("No reachable addresses in " + asList(hostAddresses));
    }

    public static URIish integrationGitServerURIFor(String repoPath)
            throws URISyntaxException, IOException, FileNotFoundException,
            UnknownHostException {
        return new URIish()
                .setScheme("ssh")
                .setUser(RSA_USER) // use RSA user by default - mini-git-server currently requires publickey auth
                .setHost(gitServerHostAddress())
                .setPort(29418)
                .setPath(repoPath);
    }

    public static Repository repoFor(File folder) throws IOException {
        File resolvedGitDir = resolveGitDirFor(folder);
        assertThat("gitdir " + resolvedGitDir + " exists", resolvedGitDir, notNullValue());
        return FileRepositoryBuilder.create(resolvedGitDir);
    }

    private static File resolveGitDirFor(File folder) {
        return RepositoryCache.FileKey.resolve(folder, FS.detect());
    }
}