/*
 *
 *    Copyright (c) 2016-2017 Nest Labs, Inc.
 *    All rights reserved.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/**
 *    @file
 *      Unit tests for the Weave Persisted Storage API.
 *
 */

#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif

#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#define WEAVE_CONFIG_BDX_NAMESPACE kWeaveManagedNamespace_Development

#include <new>
#include <stdint.h>
#include <string.h>
#include <unistd.h>

#include <nlunit-test.h>

#include <Weave/Support/PersistedCounter.h>
#include <Weave/Support/platform/PersistedStorage.h>

#include "ToolCommon.h"

#include "TestPersistedStorageImplementation.h"

#define TOOL_NAME "TestPersistedCounter"

struct TestPersistedCounterContext
{
    TestPersistedCounterContext();
    bool mVerbose;
};

TestPersistedCounterContext::TestPersistedCounterContext() :
    mVerbose(false)
{
}

static void InitializePersistedStorage(TestPersistedCounterContext *context)
{
    sPersistentStore.clear();
}

static int TestSetup(void *inContext)
{
    return SUCCESS;
}

static int TestTeardown(void *inContext)
{
    sPersistentStore.clear();
    return SUCCESS;
}

static void CheckOOB(nlTestSuite *inSuite, void *inContext)
{
    TestPersistedCounterContext *context = static_cast<TestPersistedCounterContext *>(inContext);
    WEAVE_ERROR err = WEAVE_NO_ERROR;
    nl::Weave::PersistedCounter counter;
    const char *testKey = "testcounter";
    char testValue[WEAVE_CONFIG_PERSISTED_STORAGE_MAX_VALUE_LENGTH];
    uint64_t value = 0;

    memset(testValue, 0, sizeof(testValue));

    InitializePersistedStorage(context);

    // When initializing the first time out of the box, we should have
    // a count of 0 and a value of 0x10000 for the next starting value
    // in persistent storage.

    err = counter.Init(testKey, 0x10000);
    NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);

    value = counter.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0);
}

static void CheckReboot(nlTestSuite *inSuite, void *inContext)
{
    TestPersistedCounterContext *context = static_cast<TestPersistedCounterContext *>(inContext);
    WEAVE_ERROR err = WEAVE_NO_ERROR;
    nl::Weave::PersistedCounter counter, counter2;
    const char *testKey = "testcounter";
    char testValue[WEAVE_CONFIG_PERSISTED_STORAGE_MAX_VALUE_LENGTH];
    uint64_t value = 0;

    memset(testValue, 0, sizeof(testValue));

    InitializePersistedStorage(context);

    // When initializing the first time out of the box, we should have
    // a count of 0.

    err = counter.Init(testKey, 0x10000);
    NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);

    value = counter.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0);

    // Now we "reboot", and we should get a count of 0x10000.

    err = counter2.Init(testKey, 0x10000);
    NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);

    value = counter2.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0x10000);
}

static void CheckWriteNextCounterStart(nlTestSuite *inSuite, void *inContext)
{
    TestPersistedCounterContext *context = static_cast<TestPersistedCounterContext *>(inContext);
    WEAVE_ERROR err = WEAVE_NO_ERROR;
    nl::Weave::PersistedCounter counter;
    const char *testKey = "testcounter";
    char testValue[WEAVE_CONFIG_PERSISTED_STORAGE_MAX_VALUE_LENGTH];
    uint64_t value = 0;

    memset(testValue, 0, sizeof(testValue));

    InitializePersistedStorage(context);

    // When initializing the first time out of the box, we should have
    // a count of 0.

    err = counter.Init(testKey, 0x10000);
    NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);

    value = counter.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0);

    // Verify that we write out the next starting counter value after
    // we've exhausted the counter's range.

    for (int32_t i = 0; i < 0x10000; i++)
    {
        err = counter.Advance();
        NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);
    }

    value = counter.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0x10000);

    for (int32_t i = 0; i < 0x10000; i++)
    {
        err = counter.Advance();
        NL_TEST_ASSERT(inSuite, err == WEAVE_NO_ERROR);
    }

    value = counter.GetValue();
    NL_TEST_ASSERT(inSuite, value == 0x20000);
}

// Test Suite

/**
 *  Test Suite that lists all the test functions.
 */
static const nlTest sTests[] = {
    NL_TEST_DEF("Out of box Test", CheckOOB),
    NL_TEST_DEF("Reboot Test", CheckReboot),
    NL_TEST_DEF("Write Next Counter Start Test", CheckWriteNextCounterStart),

    NL_TEST_SENTINEL()
};


static HelpOptions gHelpOptions(
    TOOL_NAME,
    "Usage: " TOOL_NAME " [<options...>]\n",
    WEAVE_VERSION_STRING "\n" WEAVE_TOOL_COPYRIGHT,
    "Test persisted counter API.  Without any options, the program invokes a suite of local tests.\n"
);

static OptionSet *gOptionSets[] =
{
    &gHelpOptions,
    NULL
};

int main(int argc, char *argv[])
{
    TestPersistedCounterContext context;

    if (!ParseArgsFromEnvVar(TOOL_NAME, TOOL_OPTIONS_ENV_VAR_NAME, gOptionSets, NULL, true) ||
        !ParseArgs(TOOL_NAME, argc, argv, gOptionSets))
    {
        exit(EXIT_FAILURE);
    }

    nlTestSuite theSuite = {
        "weave-persisted-storage",
        &sTests[0],
        TestSetup,
        TestTeardown
    };

    // Generate machine-readable, comma-separated value (CSV) output.
    nl_test_set_output_style(OUTPUT_CSV);

    // Run test suit against one context
    nlTestRunner(&theSuite, &context);

    return nlTestRunnerStats(&theSuite);
}