/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2014-2015 Intel, Inc. All rights reserved.
 * Copyright (c) 2015      Los Alamos National Security, LLC. All rights
 *                         reserved.
 * Copyright (c) 2016-2018 Cisco Systems, Inc.  All rights reserved
 * Copyright (c) 2018      Research Organization for Information Science
 *                         and Technology (RIST).  All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */


#include "opal_config.h"

#include "opal/constants.h"
#include "opal/mca/mca.h"
#include "opal/mca/base/base.h"
#include "opal/mca/pmix/pmix.h"
#include "opal/mca/pmix/base/base.h"
#include "opal/util/opal_environ.h"

/*
 * Globals
 */

int opal_pmix_base_select(void)
{
    opal_pmix_base_component_t *best_component = NULL;
    opal_pmix_base_module_t *best_module = NULL;

    // Set the PMIx component_show_load_errors MCA param based on the
    // value of OPAL's mca_base_component_show_load_errors (i.e., the
    // bool variable behind Open MPI's mca_component_show_load_errors
    // MCA param).
    char *pmix_show_load_errors_env = mca_base_component_show_load_errors ? "1" : "0";
    opal_setenv("PMIX_MCA_mca_base_component_show_load_errors", pmix_show_load_errors_env, true, &environ);

    /*
     * Select the best component
     */
    if( OPAL_SUCCESS != mca_base_select("pmix", opal_pmix_base_framework.framework_output,
					&opal_pmix_base_framework.framework_components,
					(mca_base_module_t **) &best_module,
					(mca_base_component_t **) &best_component, NULL) ) {
	/* notify caller that no available component found */
	return OPAL_ERR_NOT_FOUND;
    }

    /* Save the winner */
    opal_pmix = *best_module;

    /* do not initialize the module here as the type
     * of process determines which init (client or server)
     * should be done */

    return OPAL_SUCCESS;
}