/*
 * Copyright 2013, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Ingo Weinhold <ingo_weinhold@gmx.de>
 */


#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>

#include "Command.h"
#include "pkgman.h"
#include "PackageManager.h"


// TODO: internationalization!


using namespace BPackageKit;
using namespace BPackageKit::BPrivate;


static const char* const kShortUsage =
        "  %command% <package> ...\n"
        "    Uninstalls one or more packages.\n";

static const char* const kLongUsage =
        "Usage: %program% %command% <package> ...\n"
        "Uninstalls the specified packages.\n"
        "\n"
        "Options:\n"
        "  --debug <level>\n"
        "    Print debug output. <level> should be between 0 (no debug output,\n"
        "    the default) and 10 (most debug output).\n"
        "  -H, --home\n"
        "    Uninstall the packages from the user's home directory. Default is to\n"
        "    uninstall from the system directory.\n"
        "  -y\n"
        "    Non-interactive mode. Automatically confirm changes, but fail when\n"
        "    encountering problems.\n"
        "\n";


DEFINE_COMMAND(UninstallCommand, "uninstall", kShortUsage, kLongUsage,
        COMMAND_CATEGORY_PACKAGES)


int
UninstallCommand::Execute(int argc, const char* const* argv)
{
        BPackageInstallationLocation location
                = B_PACKAGE_INSTALLATION_LOCATION_SYSTEM;
        bool interactive = true;

        while (true) {
                static struct option sLongOptions[] = {
                        { "debug", required_argument, 0, OPTION_DEBUG },
                        { "help", no_argument, 0, 'h' },
                        { "home", no_argument, 0, 'H' },
                        { 0, 0, 0, 0 }
                };

                opterr = 0; // don't print errors
                int c = getopt_long(argc, (char**)argv, "hHy", sLongOptions, NULL);
                if (c == -1)
                        break;

                if (fCommonOptions.HandleOption(c))
                        continue;

                switch (c) {
                        case 'h':
                                PrintUsageAndExit(false);
                                break;

                        case 'H':
                                location = B_PACKAGE_INSTALLATION_LOCATION_HOME;
                                break;

                        case 'y':
                                interactive = false;
                                break;

                        default:
                                PrintUsageAndExit(true);
                                break;
                }
        }

        // The remaining arguments are the packages to be uninstalled.
        if (argc < optind + 1)
                PrintUsageAndExit(true);

        int packageCount = argc - optind;
        const char* const* packages = argv + optind;

        // perform the installation
        PackageManager packageManager(location, interactive);
        packageManager.SetDebugLevel(fCommonOptions.DebugLevel());
        packageManager.Uninstall(packages, packageCount);

        return 0;
}