/*
Copyright (c) 2019 - Advanced Micro Devices, Inc. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include <dirent.h>

#include <string>
#include <vector>
#include <memory>
#include <iostream>
#include <fstream>

#include "gtest/gtest.h"
#include "rdc/rdc_client.h"
#include "rocm_smi/rocm_smi.h"
#include "rdc_tests/test_common.h"
#include "rdc_tests/test_base.h"

#include "functional/id_info_read.h"
#include "functional/temp_read.h"
#include "functional/fan_read.h"

static RDCTstGlobals *sRDCGlvalues = nullptr;

static void SetFlags(TestBase *test) {
  assert(sRDCGlvalues != nullptr);

  test->set_verbosity(sRDCGlvalues->verbosity);
  test->set_dont_fail(sRDCGlvalues->dont_fail);
  test->set_init_options(sRDCGlvalues->init_options);
  test->set_monitor_server_ip(sRDCGlvalues->monitor_server_ip);
  test->set_monitor_server_port(sRDCGlvalues->monitor_server_port);
  test->set_secure(sRDCGlvalues->secure);
}

static void RunCustomTestProlog(TestBase *test) {
  SetFlags(test);

  test->DisplayTestInfo();
  test->SetUp();
  test->Run();
  return;
}
static void RunCustomTestEpilog(TestBase *test) {
  test->DisplayResults();
  test->Close();
  return;
}

// If the test case one big test, you should use RunGenericTest()
// to run the test case. OTOH, if the test case consists of multiple
// functions to be run as separate tests, follow this pattern:
//   * RunCustomTestProlog(test)  // Run() should contain minimal code
//   * <insert call to actual test function within test case>
//   * RunCustomTestEpilog(test)
static void RunGenericTest(TestBase *test) {
  RunCustomTestProlog(test);
  RunCustomTestEpilog(test);
  return;
}

// TEST ENTRY TEMPLATE:
// TEST(rocrtst, Perf_<test name>) {
//  <Test Implementation class> <test_obj>;
//
//  // Copy and modify implementation of RunGenericTest() if you need to deviate
//  // from the standard pattern implemented there.
//  RunGenericTest(&<test_obj>);
// }
TEST(rdctstReadOnly, TestIdInfoRead) {
  TestIdInfoRead tst;
  RunGenericTest(&tst);
}
TEST(rdctstReadOnly, TestTempRead) {
  TestTempRead tst;
  RunGenericTest(&tst);
}
TEST(rdctstReadOnly, FanRead) {
  TestFanRead tst;
  RunGenericTest(&tst);
}


static int getPIDFromName(std::string name) {
    int pid = -1;

    DIR *dir_ptr = opendir("/proc");
    if (dir_ptr != NULL) {
        struct dirent *dentry;
        while (pid < 0 && (dentry = readdir(dir_ptr))) {
            int id = atoi(dentry->d_name);
            if (id > 0) {
                std::string cmdPath = std::string("/proc/") +
                                                  dentry->d_name + "/cmdline";
                std::ifstream cmdFile(cmdPath.c_str());
                std::string cmdLine;
                getline(cmdFile, cmdLine);
                if (!cmdLine.empty()) {
                    // Only first item is the program name; others are CL args
                    size_t pos = cmdLine.find('\0');
                    if (pos != std::string::npos) {
                        cmdLine = cmdLine.substr(0, pos);
                    }
                    // Remove full path
                    pos = cmdLine.rfind('/');
                    if (pos != std::string::npos) {
                        cmdLine = cmdLine.substr(pos + 1);
                    }
                    if (name == cmdLine) {
                        pid = id;
                    }
                }
            }
        }
    }

    closedir(dir_ptr);

    return pid;
}

static int killRDCD(int pid = 0) {
  if (pid == 0) {
    pid = getPIDFromName("rdcd");

    if (pid == -1) {
      // rdcd is apparently not running
      return 0;
    }
  }

  int ret = kill(pid, SIGTERM);

  if (ret != 0) {
    perror("Failed to kill existing rdcd instance. Error: ");
    return errno;
  }

  // Try several times; it may take some time for rdcd to clean up.
  for (int i = 0; i < 20; ++i) {
    sleep(1);

    pid = getPIDFromName("rdcd");

    if (pid == -1) {
      return 0;
    }
  }

  std::cout << "ERROR: Failed to kill existing rdcd instance." << std::endl;
  return -1;
}

static int startRDCD(std::string *rdcd_path) {
  assert(rdcd_path != nullptr);
  const char *rdcd_cl[128] = {rdcd_path->c_str(), NULL};
  int pid = fork();

  if (pid == 0) {
    if (-1 == execve(rdcd_cl[0], (char **)rdcd_cl , NULL)) {  // NOLINT
      perror("child process failed to start rdcd");
      return -1;
    }
  }

  // Give rdcd a second to get to steady state.
  sleep(1);

  return pid;
}
int main(int argc, char** argv) {
  ::testing::InitGoogleTest(&argc, argv);

  RDCTstGlobals settings;
  int ret;
  int rdcd_pid = -1;

  // Set some default values
  settings.verbosity = 1;
  settings.monitor_verbosity = 1;
  settings.num_iterations = 1;
  settings.dont_fail = false;
  settings.init_options = 0;
  settings.rdcd_path = "";
  settings.monitor_server_ip = "";
  settings.monitor_server_port = "";
  settings.secure = true;

  if (ProcessCmdline(&settings, argc, argv)) {
    return 1;
  }

  if (settings.monitor_server_ip == "") {
    if (settings.rdcd_path != "") {
      if (killRDCD()) {
        return -1;
      }

      rdcd_pid = startRDCD(&settings.rdcd_path);
      assert(rdcd_pid == getPIDFromName("rdcd"));
    } else {
      if (getPIDFromName("rdcd") == -1) {
        std::cout <<
         "rdcd is not running. Use -d (--start_rdcd) to have rdcd started."
                                                  " Exiting test." << std::endl;
        return 1;
      }
    }
  }
  sRDCGlvalues = &settings;
  ret = RUN_ALL_TESTS();

  if (ret) {
    return ret;
  }

  std::cout << "****************************************" << std::endl;
  std::cout << "****************************************" << std::endl;
  std::cout << "****************************************" << std::endl;
  std::cout << "Re-running tests with init options: " << std::hex <<
                                    settings.init_options << std::endl;
  std::cout << "****************************************" << std::endl;
  std::cout << "****************************************" << std::endl;
  std::cout << "****************************************" << std::endl;
  settings.init_options = RSMI_INIT_FLAG_ALL_GPUS;
  ret = RUN_ALL_TESTS();

  if (rdcd_pid != -1) {
    if (killRDCD(rdcd_pid)) {
      return -1;
    }
  }
  return ret;
}