/* Copyright (c) 2010-2020. The SimGrid Team. All rights reserved.          */

/* This program is free software; you can redistribute it and/or modify it
 * under the terms of the license (GNU LGPL) which comes with this package. */

#include "simgrid/Exception.hpp"
#include "simgrid/msg.h"

#include <stdio.h> /* sscanf */

XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");

xbt_dynar_t tests;
int tasks_done = 0;

static void task_cleanup_handler(void* task)
{
  MSG_task_destroy(static_cast<msg_task_t>(task));
}

static int process_daemon(int /*argc*/, char** /*argv*/)
{
  msg_process_t self = MSG_process_self();
  XBT_INFO("  Start daemon on %s (%f)", MSG_host_get_name(MSG_host_self()), MSG_host_get_speed(MSG_host_self()));
  for (;;) {
    msg_task_t task = MSG_task_create("daemon", MSG_host_get_speed(MSG_host_self()), 0, NULL);
    MSG_process_set_data(self, task);
    XBT_INFO("  Execute daemon");
    MSG_task_execute(task);
    MSG_task_destroy(task);
    tasks_done++;
  }
  XBT_INFO("  daemon done. See you!");
  return 0;
}

static int commTX(int /*argc*/, char** /*argv*/)
{
  const char* mailbox = "comm";
  XBT_INFO("  Start TX");
  msg_task_t task = MSG_task_create("COMM", 0, 100000000, NULL);
  MSG_task_dsend(task, mailbox, task_cleanup_handler);
  // We should wait a bit (if not the process will end before the communication, hence an exception on the other side).
  int res = MSG_process_sleep(30);
  if (res == MSG_HOST_FAILURE) {
    XBT_INFO("The host has died ... as expected.");
  }
  XBT_INFO("  TX done");
  return 0;
}

static int commRX(int /*argc*/, char** /*argv*/)
{
  msg_task_t task     = NULL;
  const char* mailbox = "comm";
  XBT_INFO("  Start RX");
  msg_error_t error = MSG_task_receive(&(task), mailbox);
  if (error == MSG_OK) {
    XBT_INFO("  Receive message: %s", MSG_task_get_name(task));
    MSG_task_destroy(task);
  } else if (error == MSG_HOST_FAILURE) {
    XBT_INFO("  Receive message: HOST_FAILURE");
  } else if (error == MSG_TRANSFER_FAILURE) {
    XBT_INFO("  Receive message: TRANSFER_FAILURE");
  } else {
    XBT_INFO("  Receive message: %u", static_cast<unsigned int>(error));
  }
  XBT_INFO("  RX Done");
  return 0;
}

static int test_launcher(int /*argc*/, char** /*argv*/)
{
  int test = 0;
  char** argvF;
  msg_host_t jupiter = MSG_host_by_name("Jupiter");

  test = 1;
  // Create a process running a simple task on a host and turn the host off during the execution of the process.
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    XBT_INFO("Test 1:");
    XBT_INFO("  Create a process on Jupiter");
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("process_daemon");
    MSG_process_create_with_arguments("process_daemon", process_daemon, NULL, jupiter, 1, argvF);
    MSG_process_sleep(3);
    XBT_INFO("  Turn off Jupiter");
    MSG_host_off(jupiter);
    MSG_process_sleep(10);
    XBT_INFO("Test 1 seems ok, cool !(#Processes: %d, it should be 1; #tasks: %d)", MSG_process_get_number(),
             tasks_done);
  }

  test = 2;
  // Create a process that on a host that is turned off (this is not allowed)
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    XBT_INFO("Test 2:");
    XBT_INFO("  Turn off Jupiter");
    // adsein: Jupiter is already, hence nothing should happen
    // adsein: This can be one additional test, to check that you cannot shutdown twice a host
    MSG_host_off(jupiter);
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("process_daemon");
    MSG_process_create_with_arguments("process_daemon", process_daemon, NULL, jupiter, 1, argvF);
    MSG_process_sleep(10);
    XBT_INFO("  Test 2 does crash as it should. This message will not be displayed.");
  }

  test = 3;
  // Create a process running successive sleeps on a host and turn the host off during the execution of the process.
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    xbt_die("Test 3 is superseeded by activity-lifecycle");
  }

  test = 4;
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    XBT_INFO("Test 4 (turn off src during a communication) : Create a Process/task to make a communication between "
             "Jupiter and Tremblay and turn off Jupiter during the communication");
    MSG_host_on(jupiter);
    MSG_process_sleep(10);
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("commRX");
    MSG_process_create_with_arguments("commRX", commRX, NULL, MSG_host_by_name("Tremblay"), 1, argvF);
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("commTX");
    MSG_process_create_with_arguments("commTX", commTX, NULL, jupiter, 1, argvF);
    XBT_INFO("  number of processes: %d", MSG_process_get_number());
    MSG_process_sleep(10);
    XBT_INFO("  Turn Jupiter off");
    MSG_host_off(jupiter);
    XBT_INFO("Test 4 is ok.  (number of Process : %d, it should be 1 or 2 if RX has not been satisfied)."
             " An exception is raised when we turn off a node that has a process sleeping",
             MSG_process_get_number());
  }

  test = 5;
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    XBT_INFO("Test 5 (turn off dest during a communication : Create a Process/task to make a communication between "
             "Tremblay and Jupiter and turn off Jupiter during the communication");
    MSG_host_on(jupiter);
    MSG_process_sleep(10);
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("commRX");
    MSG_process_create_with_arguments("commRX", commRX, NULL, jupiter, 1, argvF);
    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("commTX");
    MSG_process_create_with_arguments("commTX", commTX, NULL, MSG_host_by_name("Tremblay"), 1, argvF);
    XBT_INFO("  number of processes: %d", MSG_process_get_number());
    MSG_process_sleep(10);
    XBT_INFO("  Turn Jupiter off");
    MSG_host_off(jupiter);
    XBT_INFO("Test 5 seems ok (number of Process: %d, it should be 2)", MSG_process_get_number());
  }

  test = 6;
  if (xbt_dynar_search_or_negative(tests, &test) != -1) {
    XBT_INFO("Test 6: Turn on Jupiter, assign a VM on Jupiter, launch a process inside the VM, and turn off the node");

    // Create VM0
    msg_vm_t vm0 = MSG_vm_create_core(jupiter, "vm0");
    MSG_vm_start(vm0);

    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("process_daemon");
    msg_process_t daemon =
        MSG_process_create_with_arguments("process_daemon", process_daemon, NULL, (msg_host_t)vm0, 1, argvF);

    argvF    = xbt_new(char*, 2);
    argvF[0] = xbt_strdup("process_daemonJUPI");
    MSG_process_create_with_arguments("process_daemonJUPI", process_daemon, NULL, jupiter, 1, argvF);

    MSG_process_suspend(daemon);
    MSG_vm_set_bound(vm0, 90);
    MSG_process_resume(daemon);

    MSG_process_sleep(10);

    XBT_INFO("  Turn Jupiter off");
    MSG_host_off(jupiter);
    XBT_INFO("  Shutdown vm0");
    MSG_vm_shutdown(vm0);
    XBT_INFO("  Destroy vm0");
    MSG_vm_destroy(vm0);
    XBT_INFO("Test 6 is also weird: when the node Jupiter is turned off once again, the VM and its daemon are not "
             "killed. However, the issue regarding the shutdown of hosted VMs can be seen a feature not a bug ;)");
  }

  XBT_INFO("  Test done. See you!");
  return 0;
}

int main(int argc, char* argv[])
{
  msg_error_t res;

  MSG_init(&argc, argv);
  xbt_assert(argc == 3, "Usage: %s platform_file test_number\n\tExample: %s msg_platform.xml 1\n", argv[0], argv[0]);

  unsigned int iter;
  char* groups;
  xbt_dynar_t s_tests = xbt_str_split(argv[2], ",");
  int tmp_test        = 0;
  tests               = xbt_dynar_new(sizeof(int), NULL);
  xbt_dynar_foreach (s_tests, iter, groups) {
    sscanf(xbt_dynar_get_as(s_tests, iter, char*), "%d", &tmp_test);
    xbt_dynar_set_as(tests, iter, int, tmp_test);
  }
  xbt_dynar_free(&s_tests);

  MSG_create_environment(argv[1]);

  MSG_process_set_data_cleanup(task_cleanup_handler);
  MSG_process_create("test_launcher", test_launcher, NULL, MSG_get_host_by_name("Tremblay"));

  res = MSG_main();

  XBT_INFO("Simulation time %g", MSG_get_clock());
  xbt_dynar_free(&tests);

  return res != MSG_OK;
}
