/*********************************************************************
 *        _       _         _
 *  _ __ | |_  _ | |  __ _ | |__   ___
 * | '__|| __|(_)| | / _` || '_ \ / __|
 * | |   | |_  _ | || (_| || |_) |\__ \
 * |_|    \__|(_)|_| \__,_||_.__/ |___/
 *
 * www.rt-labs.com
 * Copyright 2018 rt-labs AB, Sweden.
 *
 * This software is dual-licensed under GPLv3 and a commercial
 * license. See the file LICENSE.md distributed with this software for
 * full license information.
 ********************************************************************/

/**
 * @file
 * @brief Unit tests of features from the CMDEV state machine.
 *
 */

#include "utils_for_testing.h"
#include "mocks.h"

#include "pf_includes.h"

#include <gtest/gtest.h>

class CmdevUnitTest : public PnetUnitTest
{
};

TEST_F (CmdevUnitTest, CmdevCalculateDatadirectionInDescriptor)
{
   pf_data_direction_values_t resulting_direction;
   int ret;

   /* Module with no cyclic data */
   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_NO_IO,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_NO_IO,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_NO_IO,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_NO_IO,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   /* Input module */
   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_INPUT,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_INPUT,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_INPUT,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_INPUT,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   /* Output module */
   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_OUTPUT,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_OUTPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_OUTPUT,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_OUTPUT,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (-1, ret);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_OUTPUT,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_OUTPUT, resulting_direction);

   /* Input and output module */
   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_IO,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_OUTPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_IO,
      PF_DIRECTION_INPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_IO,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOCS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_INPUT, resulting_direction);

   ret = pf_cmdev_calculate_exp_sub_data_descriptor_direction (
      PNET_DIR_IO,
      PF_DIRECTION_OUTPUT,
      PF_DEV_STATUS_TYPE_IOPS,
      &resulting_direction);
   EXPECT_EQ (0, ret);
   EXPECT_EQ (PF_DIRECTION_OUTPUT, resulting_direction);
}

TEST_F (CmdevUnitTest, CmdevCheckZero)
{
   int ret;
   int ix;

   /* Shortest buffer */
   uint8_t buffer_1[1] = {0};
   ret = pf_cmdev_check_zero (buffer_1, 1);
   EXPECT_EQ (0, ret);
   for (ix = 1; ix < 0x100; ix++)
   {
      buffer_1[0] = ix;
      ret = pf_cmdev_check_zero (buffer_1, 1);
      EXPECT_EQ (-1, ret);
   }

   /* Small buffer */
   uint8_t buffer_5[5] = {0};
   ret = pf_cmdev_check_zero (buffer_5, 5);
   EXPECT_EQ (0, ret);
   for (ix = 1; ix < 0x100; ix++)
   {
      buffer_5[3] = ix;
      ret = pf_cmdev_check_zero (buffer_5, 5);
      EXPECT_EQ (-1, ret);
   }

   /* Buffer size larger than uint8_t */
   uint8_t buffer_500[500] = {0};
   ret = pf_cmdev_check_zero (buffer_500, 500);
   EXPECT_EQ (0, ret);
   for (ix = 1; ix < 0x100; ix++)
   {
      buffer_500[260] = ix;
      ret = pf_cmdev_check_zero (buffer_500, 500);
      EXPECT_EQ (-1, ret);
   }
   memset (buffer_500, 0, sizeof (buffer_500));
   ret = pf_cmdev_check_zero (buffer_500, 500);
   EXPECT_EQ (0, ret);
   memset (buffer_500, 9, sizeof (buffer_500));
   ret = pf_cmdev_check_zero (buffer_500, 500);
   EXPECT_EQ (-1, ret);

   /* Pass in length zero */
   ret = pf_cmdev_check_zero (buffer_500, 0);
   EXPECT_EQ (0, ret);
}

TEST_F (CmdevUnitTest, CmdevCheckVisibleString)
{
   int ix;
   int ret;

   ret = pf_cmdev_check_visible_string ("");
   EXPECT_EQ (-1, ret);

   ret = pf_cmdev_check_visible_string ("abc");
   EXPECT_EQ (0, ret);

   /* Short string */
   char buffer_20[20] = {0};
   ret = pf_cmdev_check_visible_string (buffer_20);
   EXPECT_EQ (-1, ret);

   buffer_20[0] = "A"[0];
   ret = pf_cmdev_check_visible_string (buffer_20);
   EXPECT_EQ (0, ret);

   memset (buffer_20, "A"[0], sizeof (buffer_20) - 1);
   ret = pf_cmdev_check_visible_string (buffer_20);
   EXPECT_EQ (0, ret);

   /* Test all character values */
   for (ix = 0x01; ix <= 0x1F; ix++)
   {
      buffer_20[10] = ix;
      ret = pf_cmdev_check_visible_string (buffer_20);
      EXPECT_EQ (-1, ret);
   }
   for (ix = 0x20; ix <= 0x7E; ix++)
   {
      buffer_20[10] = ix;
      ret = pf_cmdev_check_visible_string (buffer_20);
      EXPECT_EQ (0, ret);
   }
   for (ix = 0x7F; ix <= 0xFF; ix++)
   {
      buffer_20[10] = ix;
      ret = pf_cmdev_check_visible_string (buffer_20);
      EXPECT_EQ (-1, ret);
   }

   /* String length larger than uint8_t */
   char buffer_500[500] = {0};
   memset (buffer_500, "A"[0], sizeof (buffer_500) - 1);

   ret = pf_cmdev_check_visible_string (buffer_500);
   EXPECT_EQ (0, ret);

   buffer_500[300] = 0x07;
   ret = pf_cmdev_check_visible_string (buffer_500);
   EXPECT_EQ (-1, ret);
}

TEST_F (CmdevUnitTest, CmdevCheckNoStraddle)
{
   uint16_t start_a;
   uint16_t length_a;
   uint16_t start_b;
   uint16_t length_b;

   /*   x                      Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*   x                      Area B, initial position */
   start_a = 0;
   length_a = 1;
   length_b = 1;
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));

   /*                          Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*   x                      Area B, initial position */
   start_a = 0;
   length_a = 0;
   length_b = 1;
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));

   /*                          Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*                          Area B, initial position */
   start_a = 0;
   length_a = 0;
   length_b = 0;
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));

   /*       x                  Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*   x                      Area B, initial position */
   start_a = 2;
   length_a = 1;
   length_b = 1;
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 3, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 4, length_b));

   /*       x x                Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*   x                      Area B, initial position */
   start_a = 2;
   length_a = 2;
   length_b = 1;
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 3, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 4, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 5, length_b));

   /*           x x x          Area A                   */
   /*   0 1 2 3 4 5 6 7 8 9                             */
   /*   x x                    Area B, initial position */
   start_a = 4;
   length_a = 3;
   length_b = 2;
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 0, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 1, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 2, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 3, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 4, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 5, length_b));
   EXPECT_EQ (-1, pf_cmdev_check_no_straddle (start_a, length_a, 6, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 7, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 8, length_b));
   EXPECT_EQ (0, pf_cmdev_check_no_straddle (start_a, length_a, 9, length_b));

   /* Values larger than uint8_t */
   start_a = 1000;
   length_a = 500;
   length_b = 300;
   for (start_b = 0; start_b <= 700; start_b++)
   {
      EXPECT_EQ (
         0,
         pf_cmdev_check_no_straddle (start_a, length_a, start_b, length_b));
      EXPECT_EQ (
         0,
         pf_cmdev_check_no_straddle (start_b, length_b, start_a, length_a));
   }
   for (start_b = 701; start_b <= 1499; start_b++)
   {
      EXPECT_EQ (
         -1,
         pf_cmdev_check_no_straddle (start_a, length_a, start_b, length_b));
      EXPECT_EQ (
         -1,
         pf_cmdev_check_no_straddle (start_b, length_b, start_a, length_a));
   }
   for (start_b = 1500; start_b < 0xFFFF; start_b++)
   {
      EXPECT_EQ (
         0,
         pf_cmdev_check_no_straddle (start_a, length_a, start_b, length_b));
      EXPECT_EQ (
         0,
         pf_cmdev_check_no_straddle (start_b, length_b, start_a, length_a));
   }
   EXPECT_EQ (
      0,
      pf_cmdev_check_no_straddle (start_a, length_a, 0xFFFF, length_b));
   EXPECT_EQ (
      0,
      pf_cmdev_check_no_straddle (0xFFFF, length_b, start_a, length_a));
}

TEST_F (CmdevUnitTest, CmdevCheckArType)
{
   int ret;

   for (uint16_t ar_type = 0; ar_type < 0xFF; ar_type++)
   {
      ret = pf_cmdev_check_ar_type (ar_type);

      if (ar_type == PF_ART_IOCAR_SINGLE)
      {
         EXPECT_EQ (0, ret);
      }
      else
      {
         EXPECT_EQ (-1, ret);
      }
   }

   ret = pf_cmdev_check_ar_type (0xFFFF);
   EXPECT_EQ (-1, ret);
}