/*
 * Copyright (C) 2019 Intel Corporation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice(s),
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice(s),
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "memkind.h"
#include "include/memkind/internal/memkind_private.h"
#include "include/memkind/internal/memkind_pmem.h"

#include "common.h"

#include <sys/statfs.h>

extern const char  *PMEM_DIR;

class MemkindConfigTests: public ::testing::Test
{

protected:
    struct memkind_config *global_test_cfg;
    void SetUp()
    {
        global_test_cfg = memkind_config_new();
        ASSERT_NE(nullptr, global_test_cfg);
    }

    void TearDown()
    {
        memkind_config_delete(global_test_cfg);
    }
};

TEST_F(MemkindConfigTests, test_TC_MEMKIND_CreateAndDestroyEmptyConfig)
{
    struct memkind_config *tmp_cfg = memkind_config_new();
    ASSERT_NE(nullptr, tmp_cfg);
    memkind_config_delete(tmp_cfg);
}

TEST_F(MemkindConfigTests, test_TC_MEMKIND_PmemConSetConfigSizeZero)
{
    memkind_config_set_size(global_test_cfg, 0U);
    ASSERT_EQ(global_test_cfg->pmem_size, 0U);
}

TEST_F(MemkindConfigTests, test_TC_MEMKIND_PmemSetConfigSizeNotZero)
{
    memkind_config_set_size(global_test_cfg, 100 * MB);
    ASSERT_EQ(global_test_cfg->pmem_size, 100 * MB);
}

TEST_F(MemkindConfigTests, test_TC_MEMKIND_PmemSetConfigPath)
{
    memkind_config_set_path(global_test_cfg, PMEM_DIR);

    ASSERT_STREQ(global_test_cfg->pmem_dir, PMEM_DIR);
}

TEST_F(MemkindConfigTests, test_TC_MEMKIND_PmemSetDefaultMemoryUsagePolicy)
{
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_DEFAULT);

    ASSERT_EQ(global_test_cfg->policy, MEMKIND_MEM_USAGE_POLICY_DEFAULT);
}

TEST_F(MemkindConfigTests, test_TC_MEMKIND_SetConservativeMemoryUsagePolicy)
{
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_CONSERVATIVE);

    ASSERT_EQ(global_test_cfg->policy, MEMKIND_MEM_USAGE_POLICY_CONSERVATIVE);
}

TEST_F(MemkindConfigTests,
       test_TC_MEMKIND_PmemCreatePmemWithParamsFailWrongDirectory)
{
    memkind_t pmem_kind = nullptr;

    memkind_config_set_path(global_test_cfg, "/temp/non_exisitng_directory");
    memkind_config_set_size(global_test_cfg, 0U);
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_DEFAULT);

    int err = memkind_create_pmem_with_config(global_test_cfg, &pmem_kind);
    ASSERT_EQ(err, MEMKIND_ERROR_INVALID);
}

TEST_F(MemkindConfigTests,
       test_TC_MEMKIND_PmemCreatePmemWithParamsFailWrongSize)
{
    memkind_t pmem_kind = nullptr;

    memkind_config_set_path(global_test_cfg, PMEM_DIR);
    memkind_config_set_size(global_test_cfg, MEMKIND_PMEM_MIN_SIZE -1);
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_DEFAULT);

    int err = memkind_create_pmem_with_config(global_test_cfg, &pmem_kind);
    ASSERT_EQ(err, MEMKIND_ERROR_INVALID);
}

TEST_F(MemkindConfigTests,
       test_TC_MEMKIND_PmemCreatePmemWithParamsFailWrongPolicy)
{
    memkind_t pmem_kind = nullptr;

    memkind_config_set_path(global_test_cfg, PMEM_DIR);
    memkind_config_set_size(global_test_cfg, MEMKIND_PMEM_MIN_SIZE -1);
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_MAX_VALUE);

    int err = memkind_create_pmem_with_config(global_test_cfg, &pmem_kind);
    ASSERT_EQ(err, MEMKIND_ERROR_INVALID);
}

TEST_F(MemkindConfigTests,
       test_TC_MEMKIND_PmemCreatePmemWithParamsSuccessCheckConservativePolicy)
{
    memkind_t pmem_kind = nullptr;
    int err = 0;
    double blocksBeforeFree = 0;
    double blocksAfterFree = 0;
    struct memkind_pmem *priv = nullptr;
    void *temp_ptr = nullptr;
    struct stat st;

    memkind_config_set_path(global_test_cfg, PMEM_DIR);
    memkind_config_set_size(global_test_cfg, 0U);
    memkind_config_set_memory_usage_policy(global_test_cfg,
                                           MEMKIND_MEM_USAGE_POLICY_CONSERVATIVE);
    err = memkind_create_pmem_with_config(global_test_cfg, &pmem_kind);
    ASSERT_EQ(err, 0);

    priv = static_cast<memkind_pmem *>(pmem_kind->priv);

    temp_ptr = memkind_malloc(pmem_kind, 1 * KB);

    err = fstat(priv->fd, &st);
    ASSERT_EQ(err, 0);
    blocksBeforeFree = st.st_blocks;

    memkind_free(pmem_kind, temp_ptr);

    err = fstat(priv->fd, &st);
    ASSERT_EQ(err, 0);
    blocksAfterFree = st.st_blocks;

    //if blocksAfterFree is less than blocksBeforeFree, extent was called.
    ASSERT_LT(blocksAfterFree, blocksBeforeFree);

    err = memkind_destroy_kind(pmem_kind);
    ASSERT_EQ(err, 0);
}