/*
 * Copyright (c) 2025, 2026, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.jpackage.internal;

import java.nio.file.Path;
import java.util.Objects;
import java.util.stream.Stream;
import jdk.jpackage.internal.util.Result;

interface LinuxDebSystemEnvironmentMixin {
    Path dpkg();
    Path dpkgdeb();
    Path fakeroot();

    record Stub(Path dpkg, Path dpkgdeb, Path fakeroot) implements LinuxDebSystemEnvironmentMixin {
    }

    static Result<LinuxDebSystemEnvironmentMixin> create() {
        final var errors = Stream.of(Internal.TOOL_DPKG_DEB, Internal.TOOL_DPKG, Internal.TOOL_FAKEROOT)
                .map(ToolValidator::new)
                .map(ToolValidator::validate)
                .filter(Objects::nonNull)
                .toList();
        if (errors.isEmpty()) {
            return Result.ofValue(new Stub(Internal.TOOL_DPKG, Internal.TOOL_DPKG_DEB, Internal.TOOL_FAKEROOT));
        } else {
            return Result.ofErrors(errors);
        }
    }

    static final class Internal {

        private static final Path TOOL_DPKG_DEB = Path.of("dpkg-deb");
        private static final Path TOOL_DPKG = Path.of("dpkg");
        private static final Path TOOL_FAKEROOT = Path.of("fakeroot");
    }
}