/* -*- C -*-
 *
 * Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2011 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2011      Los Alamos National Security, LLC.
 *                         All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */
/** @file:
 *
 */

/*
 * includes
 */
#include "orte_config.h"

#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#include "opal/mca/mca.h"
#include "opal/dss/dss.h"
#include "opal/threads/threads.h"

#include "orte/constants.h"
#include "orte/types.h"
#include "orte/util/proc_info.h"
#include "orte/util/error_strings.h"
#include "orte/mca/errmgr/errmgr.h"
#include "orte/mca/ess/ess.h"
#include "orte/mca/rml/rml.h"
#include "orte/mca/rml/rml_types.h"
#include "orte/mca/routed/routed.h"
#include "orte/mca/ras/base/base.h"
#include "orte/util/name_fns.h"
#include "orte/mca/state/state.h"
#include "orte/runtime/orte_globals.h"
#include "orte/runtime/orte_quit.h"

#include "orte/mca/plm/plm_types.h"
#include "orte/mca/plm/plm.h"
#include "orte/mca/plm/base/plm_private.h"
#include "orte/mca/plm/base/base.h"

static bool recv_issued=false;

int orte_plm_base_comm_start(void)
{
    if (recv_issued) {
        return ORTE_SUCCESS;
    }
    
    OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                         "%s plm:base:receive start comm",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
    
    orte_rml.recv_buffer_nb(ORTE_NAME_WILDCARD,
                            ORTE_RML_TAG_PLM,
                            ORTE_RML_PERSISTENT,
                            orte_plm_base_recv,
                            NULL);
    if (ORTE_PROC_IS_HNP) {
        orte_rml.recv_buffer_nb(ORTE_NAME_WILDCARD,
                                ORTE_RML_TAG_ORTED_CALLBACK,
                                ORTE_RML_PERSISTENT,
                                orte_plm_base_daemon_callback, NULL);
        orte_rml.recv_buffer_nb(ORTE_NAME_WILDCARD,
                                ORTE_RML_TAG_REPORT_REMOTE_LAUNCH,
                                ORTE_RML_PERSISTENT,
                                orte_plm_base_daemon_failed, NULL);
    }
    recv_issued = true;
    
    return ORTE_SUCCESS;
}


int orte_plm_base_comm_stop(void)
{
    if (!recv_issued) {
        return ORTE_SUCCESS;
    }
    
    OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                         "%s plm:base:receive stop comm",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
    
    orte_rml.recv_cancel(ORTE_NAME_WILDCARD, ORTE_RML_TAG_PLM);
    if (ORTE_PROC_IS_HNP) {
        orte_rml.recv_cancel(ORTE_NAME_WILDCARD, ORTE_RML_TAG_ORTED_CALLBACK);
    }
    recv_issued = false;
    
    return ORTE_SUCCESS;
}


/* process incoming messages in order of receipt */
void orte_plm_base_recv(int status, orte_process_name_t* sender,
                        opal_buffer_t* buffer, orte_rml_tag_t tag,
                        void* cbdata)
{
    orte_plm_cmd_flag_t command;
    orte_std_cntr_t count;
    orte_jobid_t job;
    orte_job_t *jdata, *parent;
    opal_buffer_t *answer;
    orte_vpid_t vpid;
    orte_proc_t *proc;
    orte_proc_state_t state;
    orte_exit_code_t exit_code;
    int32_t rc=ORTE_SUCCESS, ret;
    orte_app_context_t *app, *child_app;
    orte_process_name_t name;
    pid_t pid;
    bool running;
    int8_t flag;
    int i;
    char **env;

    OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                         "%s plm:base:receive processing msg",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));

    count = 1;
    if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &command, &count, ORTE_PLM_CMD))) {
        ORTE_ERROR_LOG(rc);
        goto CLEANUP;
    }
        
    switch (command) {
    case ORTE_PLM_LAUNCH_JOB_CMD:
        OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                             "%s plm:base:receive job launch command from %s",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                             ORTE_NAME_PRINT(sender)));
                
        /* unpack the job object */
        count = 1;
        if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &jdata, &count, ORTE_JOB))) {
            ORTE_ERROR_LOG(rc);
            goto ANSWER_LAUNCH;
        }
            
        /* record the sender so we know who to respond to */
        jdata->originator.jobid = sender->jobid;
        jdata->originator.vpid = sender->vpid;

        /* get the parent's job object */
        if (NULL == (parent = orte_get_job_data_object(sender->jobid))) {
            ORTE_ERROR_LOG(ORTE_ERR_NOT_FOUND);
            goto ANSWER_LAUNCH;
        }
       /* if the prefix was set in the parent's job, we need to transfer
         * that prefix to the child's app_context so any further launch of
         * orteds can find the correct binary. There always has to be at
         * least one app_context in both parent and child, so we don't
         * need to check that here. However, be sure not to overwrite
         * the prefix if the user already provided it!
         */
        app = (orte_app_context_t*)opal_pointer_array_get_item(parent->apps, 0);
        child_app = (orte_app_context_t*)opal_pointer_array_get_item(jdata->apps, 0);
        if (NULL != app->prefix_dir &&
            NULL == child_app->prefix_dir) {
            child_app->prefix_dir = strdup(app->prefix_dir);
        }

        /* if the user asked to forward any envars, cycle through the app contexts
         * in the comm_spawn request and add them
         */
        if (NULL != orte_forwarded_envars) {
            for (i=0; i < jdata->apps->size; i++) {
                if (NULL == (app = (orte_app_context_t*)opal_pointer_array_get_item(jdata->apps, i))) {
                    continue;
                }
                env = opal_environ_merge(orte_forwarded_envars, app->env);
                opal_argv_free(app->env);
                app->env = env;
            }
        }

        OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                             "%s plm:base:receive adding hosts",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));

        /* process any add-hostfile and add-host options that were provided */
        if (ORTE_SUCCESS != (rc = orte_ras_base_add_hosts(jdata))) {
            ORTE_ERROR_LOG(rc);
            goto ANSWER_LAUNCH;
        }

        if( NULL == parent->bookmark ) {
            /* find the sender's node in the job map */
            if (NULL != (proc = (orte_proc_t*)opal_pointer_array_get_item(parent->procs, sender->vpid))) {
                /* set the bookmark so the child starts from that place - this means
                 * that the first child process could be co-located with the proc
                 * that called comm_spawn, assuming slots remain on that node. Otherwise,
                 * the procs will start on the next available node
                 */
                jdata->bookmark = proc->node;
            }
        } else {
            jdata->bookmark = parent->bookmark;
        }
        /* provide the parent's last object */
        jdata->bkmark_obj = parent->bkmark_obj;
        
        /* launch it */
        OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                             "%s plm:base:receive calling spawn",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
        if (ORTE_SUCCESS != (rc = orte_plm.spawn(jdata))) {
            ORTE_ERROR_LOG(rc);
            goto ANSWER_LAUNCH;
        }
        break;
    ANSWER_LAUNCH:
        OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                             "%s plm:base:receive - error on launch: %d",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), rc));

        /* setup the response */
        answer = OBJ_NEW(opal_buffer_t);
        
        /* pack the error code to be returned */
        if (ORTE_SUCCESS != (ret = opal_dss.pack(answer, &rc, 1, OPAL_INT32))) {
            ORTE_ERROR_LOG(ret);
        }
                
        /* send the response back to the sender */
        if (0 > (ret = orte_rml.send_buffer_nb(sender, answer, ORTE_RML_TAG_PLM_PROXY,
                                               orte_rml_send_callback, NULL))) {
            ORTE_ERROR_LOG(ret);
            OBJ_RELEASE(answer);
        }
        break;
                
    case ORTE_PLM_UPDATE_PROC_STATE:
        opal_output_verbose(5, orte_plm_base_framework.framework_output,
                            "%s plm:base:receive update proc state command from %s",
                            ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                            ORTE_NAME_PRINT(sender));
        count = 1;
        while (ORTE_SUCCESS == (rc = opal_dss.unpack(buffer, &job, &count, ORTE_JOBID))) {
                    
            opal_output_verbose(5, orte_plm_base_framework.framework_output,
                                "%s plm:base:receive got update_proc_state for job %s",
                                ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                                ORTE_JOBID_PRINT(job));
                    
            name.jobid = job;
            running = false;
            /* get the job object */
            jdata = orte_get_job_data_object(job);
            count = 1;
            while (ORTE_SUCCESS == (rc = opal_dss.unpack(buffer, &vpid, &count, ORTE_VPID))) {
                if (ORTE_VPID_INVALID == vpid) {
                    /* flag indicates that this job is complete - move on */
                    break;
                }
                name.vpid = vpid;
                /* unpack the pid */
                count = 1;
                if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &pid, &count, OPAL_PID))) {
                    ORTE_ERROR_LOG(rc);
                    goto CLEANUP;
                }
                /* unpack the state */
                count = 1;
                if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &state, &count, ORTE_PROC_STATE))) {
                    ORTE_ERROR_LOG(rc);
                    goto CLEANUP;
                }
                if (ORTE_PROC_STATE_RUNNING == state) {
                    running = true;
                }
                /* unpack the exit code */
                count = 1;
                if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &exit_code, &count, ORTE_EXIT_CODE))) {
                    ORTE_ERROR_LOG(rc);
                    goto CLEANUP;
                }
                        
                OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                                     "%s plm:base:receive got update_proc_state for vpid %lu state %s exit_code %d",
                                     ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                                     (unsigned long)vpid, orte_proc_state_to_str(state), (int)exit_code));

                if (NULL != jdata) {
                    /* get the proc data object */
                    if (NULL == (proc = (orte_proc_t*)opal_pointer_array_get_item(jdata->procs, vpid))) {
                        ORTE_ERROR_LOG(ORTE_ERR_NOT_FOUND);
                        ORTE_FORCED_TERMINATE(ORTE_ERROR_DEFAULT_EXIT_CODE);
                    }
                    /* NEVER update the proc state before activating the state machine - let
                     * the state cbfunc update it as it may need to compare this
                     * state against the prior proc state */
                    proc->pid = pid;
                    proc->exit_code = exit_code;
                    ORTE_ACTIVATE_PROC_STATE(&name, state);
                }
            }
            /* record that we heard back from a daemon during app launch */
            if (running && NULL != jdata) {
                jdata->num_daemons_reported++;
                if (orte_report_launch_progress) {
                    if (0 == jdata->num_daemons_reported % 100 ||
                        jdata->num_daemons_reported == orte_process_info.num_procs) {
                        ORTE_ACTIVATE_JOB_STATE(jdata, ORTE_JOB_STATE_REPORT_PROGRESS);
                    }
                }
            }
            /* prepare for next job */
            count = 1;
        }
        if (ORTE_ERR_UNPACK_READ_PAST_END_OF_BUFFER != rc) {
            ORTE_ERROR_LOG(rc);
        } else {
            rc = ORTE_SUCCESS;
        }
        break;
                
    case ORTE_PLM_INIT_ROUTES_CMD:
        count=1;
        if (ORTE_SUCCESS != (rc = opal_dss.unpack(buffer, &job, &count, ORTE_JOBID))) {
            ORTE_ERROR_LOG(rc);
            goto DEPART;
        }
        name.jobid = job;
        /* get the job object */
        if (NULL == (jdata = orte_get_job_data_object(job))) {
            ORTE_ERROR_LOG(ORTE_ERR_NOT_FOUND);
            rc = ORTE_ERR_NOT_FOUND;
            goto DEPART;
        }
        count=1;
        while (ORTE_SUCCESS == opal_dss.unpack(buffer, &vpid, &count, ORTE_VPID)) {
            if (ORTE_VPID_INVALID == vpid) {
                break;
            }
            name.vpid = vpid;
            /* unpack the mpi proc flag */
            count=1;
            if (OPAL_SUCCESS != (rc = opal_dss.unpack(buffer, &flag, &count, OPAL_INT8))) {
                ORTE_ERROR_LOG(rc);
                goto DEPART;
            }
            /* get the proc data object */
            if (NULL == (proc = (orte_proc_t*)opal_pointer_array_get_item(jdata->procs, vpid))) {
                ORTE_ERROR_LOG(ORTE_ERR_NOT_FOUND);
                rc = ORTE_ERR_NOT_FOUND;
                goto DEPART;
            }
            if (1 == flag) {
                proc->mpi_proc = true;
            } else {
                proc->mpi_proc = false;
            }
            ORTE_ACTIVATE_PROC_STATE(&name, ORTE_PROC_STATE_REGISTERED);
            count=1;
        }
        /* pass the remainder of the buffer to the active module's
         * init_routes API
         */
        if (ORTE_SUCCESS != (rc = orte_routed.init_routes(job, buffer))) {
            ORTE_ERROR_LOG(rc);
            ORTE_FORCED_TERMINATE(ORTE_ERROR_DEFAULT_EXIT_CODE);
        }
        break;

    default:
        ORTE_ERROR_LOG(ORTE_ERR_VALUE_OUT_OF_BOUNDS);
        rc = ORTE_ERR_VALUE_OUT_OF_BOUNDS;
        break;
    }
        
 CLEANUP:
    if (ORTE_SUCCESS != rc) {
        goto DEPART;
    }
        
 DEPART:
    /* see if an error occurred - if so, wakeup the HNP so we can exit */
    if (ORTE_PROC_IS_HNP && ORTE_SUCCESS != rc) {
        jdata = NULL;
        ORTE_FORCED_TERMINATE(ORTE_ERROR_DEFAULT_EXIT_CODE);
    }
    
    OPAL_OUTPUT_VERBOSE((5, orte_plm_base_framework.framework_output,
                         "%s plm:base:receive done processing commands",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
}

/* where HNP messages come */
void orte_plm_base_receive_process_msg(int fd, short event, void *data)
{
    assert(0);
}
