/**
 * This file is part of the public ComputerCraft API - http://www.computercraft.info
 * Copyright Daniel Ratcliffe, 2011-2015. This API may be redistributed unmodified and in
 * full only. For help using the API, and posting your mods, visit the forums at
 * computercraft.info.
 */

package dan200.computercraft.api.turtle;

public final class TurtleCommandResult {
    private static final TurtleCommandResult s_success
        = new TurtleCommandResult(true, null, null);
    private static final TurtleCommandResult s_emptyFailure
        = new TurtleCommandResult(false, null, null);

    public static TurtleCommandResult success() {
        return success(null);
    }

    public static TurtleCommandResult success(Object[] results) {
        if (results == null || results.length == 0) {
            return s_success;
        } else {
            return new TurtleCommandResult(true, null, results);
        }
    }

    public static TurtleCommandResult failure() {
        return failure(null);
    }

    public static TurtleCommandResult failure(String errorMessage) {
        if (errorMessage == null) {
            return s_emptyFailure;
        } else {
            return new TurtleCommandResult(false, errorMessage, null);
        }
    }

    private final boolean m_success;
    private final String m_errorMessage;
    private final Object[] m_results;

    private TurtleCommandResult(boolean success, String errorMessage, Object[] results) {
        m_success = success;
        m_errorMessage = errorMessage;
        m_results = results;
    }

    public boolean isSuccess() {
        return m_success;
    }

    public String getErrorMessage() {
        return m_errorMessage;
    }

    public Object[] getResults() {
        return m_results;
    }
}