/* -*- C -*-
 * 
 * $HEADER$
 *
 */

#include "ompi_config.h"

#include "pcm_rsh.h"
#include "include/constants.h"
#include "include/types.h"
#include "util/malloc.h"
#include "util/output.h"
#include "class/ompi_list.h"
#include "mca/mca.h"
#include "mca/base/mca_base_param.h"
#include "mca/pcm/pcm.h"
#include "mca/pcm/base/base.h"
#include "mca/llm/llm.h"
#include "mca/llm/base/base.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/*
 * Struct of function pointers and all that to let us be initialized
 */
mca_pcm_base_component_1_0_0_t mca_pcm_rsh_component = {
  {
    MCA_PCM_BASE_VERSION_1_0_0,

    "rsh", /* MCA component name */
    1,  /* MCA component major version */
    0,  /* MCA component minor version */
    0,  /* MCA component release version */
    mca_pcm_rsh_component_open,  /* component open */
    mca_pcm_rsh_component_close /* component close */
  },
  {
    false /* checkpoint / restart */
  },
  mca_pcm_rsh_init,    /* component init */
  NULL                 /* unique name */
};


/* need to create output stream to dump in file */
ompi_output_stream_t mca_pcm_rsh_output_stream = {
    false, /* lds_is_debugging  BWB - change me for release */
    0,     /* lds_verbose_level */
    false, /* lds_want_syslog */
    0,     /* lds_syslog_priority */
    NULL,  /* lds_syslog_ident */
    "pcm: rsh: ", /* lds_prefix */
    true,  /* lds_want_stdout */
    false, /* lds_want_stderr */
    true,  /* lds_want_file */
    true,  /* lds_want_file_append */
    "pcm_rsh" /* lds_file_suffix */
};


/*
 * component variables handles
 */
static int mca_pcm_rsh_param_no_profile;
static int mca_pcm_rsh_param_fast;
static int mca_pcm_rsh_param_ignore_stderr;
static int mca_pcm_rsh_param_priority;
static int mca_pcm_rsh_param_agent;
static int mca_pcm_rsh_param_debug;

/*
 * component variables
 */
/* debugging output stream */
int mca_pcm_rsh_output = -1;


int
mca_pcm_rsh_component_open(void)
{
    mca_pcm_rsh_param_debug =
        mca_base_param_register_int("pcm", "rsh", "debug", NULL, 100);

  mca_pcm_rsh_param_agent = 
      mca_base_param_register_string("pcm", "rsh", "agent", NULL, 
				      "ssh");

  mca_pcm_rsh_param_no_profile =
    mca_base_param_register_int("pcm", "rsh", "no_profile", NULL, 1);
  mca_pcm_rsh_param_fast =
    mca_base_param_register_int("pcm", "rsh", "fast", NULL, 1);
  mca_pcm_rsh_param_ignore_stderr =
    mca_base_param_register_int("pcm", "rsh", "ignore_stderr", NULL, 0);

  mca_pcm_rsh_param_priority =
    mca_base_param_register_int("pcm", "rsh", "priority", NULL, 1);

  mca_pcm_rsh_output = ompi_output_open(&mca_pcm_rsh_output_stream);

  return OMPI_SUCCESS;
}


int
mca_pcm_rsh_component_close(void)
{
    if (mca_pcm_rsh_output > 0) {
        ompi_output_close(mca_pcm_rsh_output);
    }

    return OMPI_SUCCESS;
}


mca_pcm_base_module_t*
mca_pcm_rsh_init(int *priority, 
		  bool *allow_multi_user_threads, 
                 bool *have_hidden_threads,
                 int constraints)
{
    int debug;
    int ret;
    mca_pcm_rsh_module_t *me;

    /* do debugging gorp */
    mca_base_param_lookup_int(mca_pcm_rsh_param_debug, &debug);
    ompi_output_set_verbosity(mca_pcm_rsh_output, debug);

    /* get our priority */
    mca_base_param_lookup_int(mca_pcm_rsh_param_priority, priority);

    me = malloc(sizeof(mca_pcm_rsh_module_t));
    if (NULL == me) return NULL;

    /* fill in params */
    mca_base_param_lookup_int(mca_pcm_rsh_param_no_profile, 
			      &(me->no_profile));
    mca_base_param_lookup_int(mca_pcm_rsh_param_fast, 
                              &(me->fast_boot));
    mca_base_param_lookup_int(mca_pcm_rsh_param_ignore_stderr, 
                              &(me->ignore_stderr));
    mca_base_param_lookup_string(mca_pcm_rsh_param_agent,
                                 &(me->rsh_agent));

    *allow_multi_user_threads = true;
    *have_hidden_threads = false;

    ret = mca_llm_base_select("rsh", &(me->llm),
                              allow_multi_user_threads,
                              have_hidden_threads);
    if (OMPI_SUCCESS != ret) {
        /* well, that can't be good.  guess we can't run */
        ompi_output_verbose(5, mca_pcm_rsh_output, "init: no llm found");
        return NULL;
    }

    /*
     * fill in the function pointers
     */
    me->super.pcm_allocate_resources = mca_pcm_rsh_allocate_resources;
    me->super.pcm_spawn_procs = mca_pcm_rsh_spawn_procs;
    me->super.pcm_kill_proc = mca_pcm_rsh_kill_proc;
    me->super.pcm_kill_job = mca_pcm_rsh_kill_job;
    me->super.pcm_deallocate_resources = mca_pcm_rsh_deallocate_resources;
    me->super.pcm_finalize = mca_pcm_rsh_finalize;

    /* DO SOME PARAM "FIXING" */
    /* BWB - remove param fixing before 1.0 */
    if (0 == me->no_profile) {
        printf("WARNING: reseting mca_pcm_rsh_no_profile to 1\n");
        me->no_profile = 1;
    }
    if (0 == me->fast_boot) {
        printf("WARNING: reseting mca_pcm_rsh_fast to 1\n");
        me->fast_boot = 1;
    }

    return (mca_pcm_base_module_t*) me;
}


int
mca_pcm_rsh_finalize(struct mca_pcm_base_module_1_0_0_t* me_super)
{
    mca_pcm_rsh_module_t *me = (mca_pcm_rsh_module_t*) me_super;

    if (me != NULL) {
        if (NULL != me->rsh_agent) free(me->rsh_agent);
        free(me);
    }

    return OMPI_SUCCESS;
}