/* mbed Microcontroller Library
 * Copyright (c) 2016 ARM Limited
 *
 * 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.
 */

#include "mbed.h"
#include "greentea-client/test_env.h"
#include "unity.h"
#include "utest.h"
#include <stdlib.h>
#include <errno.h>

using namespace utest::v1;

// test configuration
#ifndef MBED_TEST_FILESYSTEM
#define MBED_TEST_FILESYSTEM FATFileSystem
#endif

#ifndef MBED_TEST_FILESYSTEM_DECL
#define MBED_TEST_FILESYSTEM_DECL MBED_TEST_FILESYSTEM fs("fs")
#endif

#ifndef MBED_TEST_BLOCKDEVICE
#define MBED_TEST_BLOCKDEVICE SDBlockDevice
#define MBED_TEST_BLOCKDEVICE_DECL SDBlockDevice bd(MBED_CONF_SD_SPI_MOSI, MBED_CONF_SD_SPI_MISO, MBED_CONF_SD_SPI_CLK, MBED_CONF_SD_SPI_CS);
#endif

#ifndef MBED_TEST_BLOCKDEVICE_DECL
#define MBED_TEST_BLOCKDEVICE_DECL MBED_TEST_BLOCKDEVICE bd
#endif

#ifndef MBED_TEST_FILES
#define MBED_TEST_FILES 4
#endif

#ifndef MBED_TEST_DIRS
#define MBED_TEST_DIRS 4
#endif

#ifndef MBED_TEST_BUFFER
#define MBED_TEST_BUFFER 8192
#endif

#ifndef MBED_TEST_TIMEOUT
#define MBED_TEST_TIMEOUT 120
#endif


// declarations
#define STRINGIZE(x) STRINGIZE2(x)
#define STRINGIZE2(x) #x
#define INCLUDE(x) STRINGIZE(x.h)

#include INCLUDE(MBED_TEST_FILESYSTEM)
#include INCLUDE(MBED_TEST_BLOCKDEVICE)

MBED_TEST_FILESYSTEM_DECL;
MBED_TEST_BLOCKDEVICE_DECL;

Dir dir[MBED_TEST_DIRS];
File file[MBED_TEST_FILES];
DIR *dd[MBED_TEST_DIRS];
FILE *fd[MBED_TEST_FILES];
struct dirent ent;
struct dirent *ed;
size_t size;
uint8_t buffer[MBED_TEST_BUFFER];
uint8_t rbuffer[MBED_TEST_BUFFER];
uint8_t wbuffer[MBED_TEST_BUFFER];


// tests

void test_seek_tests()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = MBED_TEST_FILESYSTEM::format(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = fs.mkdir("hello", 0777);
        TEST_ASSERT_EQUAL(0, res);
        for (int i = 0; i < 132; i++) {
            sprintf((char *)buffer, "hello/kitty%d", i);
            res = file[0].open(&fs, (char *)buffer,
                               O_WRONLY | O_CREAT | O_APPEND);
            TEST_ASSERT_EQUAL(0, res);

            size = strlen("kittycatcat");
            memcpy(buffer, "kittycatcat", size);
            for (int j = 0; j < 132; j++) {
                file[0].write(buffer, size);
            }
            res = file[0].close();
            TEST_ASSERT_EQUAL(0, res);
        }
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_simple_dir_seek()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].open(&fs, "hello");
        TEST_ASSERT_EQUAL(0, res);
#if (MBED_TEST_FILESYSTEM != FATFileSystem)
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, ".");
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, "..");
        TEST_ASSERT_EQUAL(0, res);
#endif

        off_t pos;
        int i;
        for (i = 0; i < 4; i++) {
            sprintf((char *)buffer, "kitty%d", i);
            res = dir[0].read(&ent);
            TEST_ASSERT_EQUAL(1, res);
            res = strcmp(ent.d_name, (char *)buffer);
            TEST_ASSERT_EQUAL(0, res);
            pos = dir[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);

        dir[0].seek(pos);
        sprintf((char *)buffer, "kitty%d", i);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);

        dir[0].rewind();
        sprintf((char *)buffer, "kitty%d", 0);
#if (MBED_TEST_FILESYSTEM != FATFileSystem)
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, ".");
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, "..");
        TEST_ASSERT_EQUAL(0, res);
#endif
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);

        dir[0].seek(pos);
        sprintf((char *)buffer, "kitty%d", i);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_large_dir_seek()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].open(&fs, "hello");
        TEST_ASSERT_EQUAL(0, res);
#if (MBED_TEST_FILESYSTEM != FATFileSystem)
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, ".");
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, "..");
        TEST_ASSERT_EQUAL(0, res);
#endif

        off_t pos;
        int i;
        for (i = 0; i < 128; i++) {
            sprintf((char *)buffer, "kitty%d", i);
            res = dir[0].read(&ent);
            TEST_ASSERT_EQUAL(1, res);
            res = strcmp(ent.d_name, (char *)buffer);
            TEST_ASSERT_EQUAL(0, res);
            pos = dir[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);

        dir[0].seek(pos);
        sprintf((char *)buffer, "kitty%d", i);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);

        dir[0].rewind();
        sprintf((char *)buffer, "kitty%d", 0);
#if (MBED_TEST_FILESYSTEM != FATFileSystem)
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, ".");
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, "..");
        TEST_ASSERT_EQUAL(0, res);
#endif
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);

        dir[0].seek(pos);
        sprintf((char *)buffer, "kitty%d", i);
        res = dir[0].read(&ent);
        TEST_ASSERT_EQUAL(1, res);
        res = strcmp(ent.d_name, (char *)buffer);
        TEST_ASSERT_EQUAL(0, res);
        res = dir[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_simple_file_seek()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDONLY);
        TEST_ASSERT_EQUAL(0, res);

        off_t pos;
        size = strlen("kittycatcat");
        for (int i = 0; i < 4; i++) {
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = memcmp(buffer, "kittycatcat", size);
            TEST_ASSERT_EQUAL(0, res);
            pos = file[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        file[0].rewind();
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_CUR);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_END) >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        size_t size = file[0].size();
        res = file[0].seek(0, SEEK_CUR);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_large_file_seek()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDONLY);
        TEST_ASSERT_EQUAL(0, res);

        off_t pos;
        size = strlen("kittycatcat");
        for (int i = 0; i < 128; i++) {
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = memcmp(buffer, "kittycatcat", size);
            TEST_ASSERT_EQUAL(0, res);
            pos = file[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        file[0].rewind();
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_CUR);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_END) >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        size_t size = file[0].size();
        res = file[0].seek(0, SEEK_CUR);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_simple_file_seek_and_write()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDWR);
        TEST_ASSERT_EQUAL(0, res);

        off_t pos;
        size = strlen("kittycatcat");
        for (int i = 0; i < 4; i++) {
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = memcmp(buffer, "kittycatcat", size);
            TEST_ASSERT_EQUAL(0, res);
            pos = file[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);

        memcpy(buffer, "doggodogdog", size);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].write(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "doggodogdog", size);
        TEST_ASSERT_EQUAL(0, res);

        file[0].rewind();
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "doggodogdog", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_END) >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        size_t size = file[0].size();
        res = file[0].seek(0, SEEK_CUR);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_large_file_seek_and_write()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDWR);
        TEST_ASSERT_EQUAL(0, res);

        off_t pos;
        size = strlen("kittycatcat");
        for (int i = 0; i < 128; i++) {
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            if (i != 4) {
                res = memcmp(buffer, "kittycatcat", size);
                TEST_ASSERT_EQUAL(0, res);
            }
            pos = file[0].tell();
        }
        res = pos >= 0;
        TEST_ASSERT_EQUAL(1, res);

        memcpy(buffer, "doggodogdog", size);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].write(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "doggodogdog", size);
        TEST_ASSERT_EQUAL(0, res);

        file[0].rewind();
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(pos, SEEK_SET);
        TEST_ASSERT_EQUAL(pos, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "doggodogdog", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(-size, SEEK_END) >= 0;
        TEST_ASSERT_EQUAL(1, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "kittycatcat", size);
        TEST_ASSERT_EQUAL(0, res);

        size_t size = file[0].size();
        res = file[0].seek(0, SEEK_CUR);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_boundary_seek_and_write()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDWR);
        TEST_ASSERT_EQUAL(0, res);

        size = strlen("hedgehoghog");
        const off_t offsets[] = {512, 1020, 513, 1021, 511, 1019};

        for (int i = 0; i < sizeof(offsets) / sizeof(offsets[0]); i++) {
            off_t off = offsets[i];
            memcpy(buffer, "hedgehoghog", size);
            res = file[0].seek(off, SEEK_SET);
            TEST_ASSERT_EQUAL(off, res);
            res = file[0].write(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = file[0].seek(off, SEEK_SET);
            TEST_ASSERT_EQUAL(off, res);
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = memcmp(buffer, "hedgehoghog", size);
            TEST_ASSERT_EQUAL(0, res);
            res = file[0].seek(0, SEEK_SET);
            TEST_ASSERT_EQUAL(0, res);
            res = file[0].read(buffer, size);
            TEST_ASSERT_EQUAL(size, res);
            res = memcmp(buffer, "kittycatcat", size);
            TEST_ASSERT_EQUAL(0, res);
            res = file[0].sync();
            TEST_ASSERT_EQUAL(0, res);
        }
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}

void test_out_of_bounds_seek()
{
    int res = bd.init();
    TEST_ASSERT_EQUAL(0, res);

    {
        res = fs.mount(&bd);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].open(&fs, "hello/kitty42", O_RDWR);
        TEST_ASSERT_EQUAL(0, res);

        size = strlen("kittycatcat");
        res = file[0].size();
        TEST_ASSERT_EQUAL(132 * size, res);
        res = file[0].seek((132 + 4) * size,
                           SEEK_SET);
        TEST_ASSERT_EQUAL((132 + 4)*size, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(0, res);

        memcpy(buffer, "porcupineee", size);
        res = file[0].write(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = file[0].seek((132 + 4) * size,
                           SEEK_SET);
        TEST_ASSERT_EQUAL((132 + 4)*size, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
        res = memcmp(buffer, "porcupineee", size);
        TEST_ASSERT_EQUAL(0, res);
        res = file[0].seek(132 * size,
                           SEEK_SET);
        TEST_ASSERT_EQUAL(132 * size, res);
        res = file[0].read(buffer, size);
        TEST_ASSERT_EQUAL(size, res);
#if (MBED_TEST_FILESYSTEM != FATFileSystem)
        // FatFs does not guarantee empty expanded buffer
        res = memcmp(buffer, "\0\0\0\0\0\0\0\0\0\0\0", size);
        TEST_ASSERT_EQUAL(0, res);
#endif
        res = file[0].close();
        TEST_ASSERT_EQUAL(0, res);
        res = fs.unmount();
        TEST_ASSERT_EQUAL(0, res);
    }

    res = bd.deinit();
    TEST_ASSERT_EQUAL(0, res);
}



// test setup
utest::v1::status_t test_setup(const size_t number_of_cases)
{
    GREENTEA_SETUP(MBED_TEST_TIMEOUT, "default_auto");
    return verbose_test_setup_handler(number_of_cases);
}

Case cases[] = {
    Case("Seek tests", test_seek_tests),
    Case("Simple dir seek", test_simple_dir_seek),
    Case("Large dir seek", test_large_dir_seek),
    Case("Simple file seek", test_simple_file_seek),
    Case("Large file seek", test_large_file_seek),
    Case("Simple file seek and write", test_simple_file_seek_and_write),
    Case("Large file seek and write", test_large_file_seek_and_write),
    Case("Boundary seek and write", test_boundary_seek_and_write),
    Case("Out-of-bounds seek", test_out_of_bounds_seek),
};

Specification specification(test_setup, cases);

int main()
{
    return !Harness::run(specification);
}
