/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
Copyright (c) 2017-2020 c4games.com.

http://www.cocos2d-x.org

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.
****************************************************************************/
#if defined(_WIN32)
#include <io.h>
#include <direct.h>
#else
#include <unistd.h>
#include <errno.h>
#endif
#include <fcntl.h>
#include <sys/stat.h>

#include "base/CCUserDefault.h"
#include "platform/CCCommon.h"
#include "platform/CCFileUtils.h"
#include "pugixml/pugixml_imp.hpp"
#include "base/base64.h"
#include "base/ccUtils.h"

#include "yasio/ibstream.hpp"
#include "yasio/obstream.hpp"
#include "yasio/detail/sz.hpp"

#if defined(_WIN32)
#define O_READ_FLAGS O_BINARY | O_RDONLY, S_IREAD
#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD
#define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD
#define posix_open ::_open
#define posix_close ::_close
#define posix_lseek ::_lseek
#define posix_read ::_read
#define posix_write ::_write
#define posix_fd2fh(fd) reinterpret_cast<HANDLE>(_get_osfhandle(fd))
#define posix_fsetsize(fd, size) ::_chsize(fd, size)
#else
#define O_READ_FLAGS O_RDONLY, S_IRUSR
#define O_WRITE_FLAGS O_CREAT | O_RDWR, S_IRWXU
#define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR, S_IRWXU
#define posix_open ::open
#define posix_close ::close
#define posix_lseek ::lseek
#define posix_read ::read
#define posix_write ::write
#define posix_fd2fh(fd) (fd)
#define posix_fsetsize(fd, size) ::ftruncate(fd, size), ::lseek(fd, 0, SEEK_SET)
#endif

#define USER_DEFAULT_FILENAME "UserDefault.bin"

NS_CC_BEGIN

/**
 * implements of UserDefault
 */

UserDefault* UserDefault::_userDefault = nullptr;

UserDefault::~UserDefault()
{
    _rwmmap.reset();
    if (_fd != -1)
        posix_close(_fd);
}

UserDefault::UserDefault()
{
}

bool UserDefault::getBoolForKey(const char* pKey)
{
 return getBoolForKey(pKey, false);
}

bool UserDefault::getBoolForKey(const char* pKey, bool defaultValue)
{
    auto it = this->_values.find(pKey);
    if (it != this->_values.end())
        return it->second == "1";

    return defaultValue;
}

int UserDefault::getIntegerForKey(const char* pKey)
{
    return getIntegerForKey(pKey, 0);
}

int UserDefault::getIntegerForKey(const char* pKey, int defaultValue)
{
    auto it = this->_values.find(pKey);
    if (it != this->_values.end())
        return atoi(it->second.c_str());

    return defaultValue;
}

float UserDefault::getFloatForKey(const char* pKey)
{
    return getFloatForKey(pKey, 0.0f);
}

float UserDefault::getFloatForKey(const char* pKey, float defaultValue)
{
    float ret = (float)getDoubleForKey(pKey, (double)defaultValue);
 
    return ret;
}

double  UserDefault::getDoubleForKey(const char* pKey)
{
    return getDoubleForKey(pKey, 0.0);
}

double UserDefault::getDoubleForKey(const char* pKey, double defaultValue)
{
    auto it = this->_values.find(pKey);
    if (it != this->_values.end())
        return utils::atof(it->second.c_str());

    return defaultValue;
}

std::string UserDefault::getStringForKey(const char* pKey)
{
    return getStringForKey(pKey, "");
}

std::string UserDefault::getStringForKey(const char* pKey, const std::string & defaultValue)
{
    auto it = this->_values.find(pKey);
    if (it != this->_values.end())
        return it->second;

    return defaultValue;
}

void UserDefault::setBoolForKey(const char* pKey, bool value)
{
    // save bool value as string
    setStringForKey(pKey, value ? "true" : "false");
}

void UserDefault::setIntegerForKey(const char* pKey, int value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%d", value);

    setStringForKey(pKey, tmp);
}

void UserDefault::setFloatForKey(const char* pKey, float value)
{
    setDoubleForKey(pKey, value);
}

void UserDefault::setDoubleForKey(const char* pKey, double value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    // format the value
    char tmp[50];
    memset(tmp, 0, 50);
    sprintf(tmp, "%f", value);

    setStringForKey(pKey, tmp);
}

void UserDefault::setStringForKey(const char* pKey, const std::string & value)
{
    // check key
    if (! pKey)
    {
        return;
    }

    auto it = this->_values.find(pKey);

    if (it != this->_values.end())
        it->second = value;
    else
        this->_values.emplace(pKey, value);

    flush();
}

UserDefault* UserDefault::getInstance()
{
    if (!_userDefault)
    {
        _userDefault = new (std::nothrow) UserDefault();
        _userDefault->init();
    }

    return _userDefault;
}

void UserDefault::destroyInstance()
{
    CC_SAFE_DELETE(_userDefault);
}

void UserDefault::setDelegate(UserDefault *delegate)
{
    if (_userDefault)
        delete _userDefault;

    _userDefault = delegate;
}

void UserDefault::init()
{
    if (! _initialized)
    {
        _filePath = FileUtils::getInstance()->getWritablePath() + USER_DEFAULT_FILENAME;

        // construct file mapping
        _fd = posix_open(_filePath.c_str(), O_WRITE_FLAGS);
        if (_fd == -1) {
            log("[Warnning] UserDefault::init open storage file '%s' failed!", _filePath.c_str());
            return;
        }

        int filesize = posix_lseek(_fd, 0, SEEK_END);
        posix_lseek(_fd, 0, SEEK_SET);

        if (filesize < _curMapSize) {
            posix_fsetsize(_fd, _curMapSize);
        }
        /// load to memory _values
        _rwmmap = std::make_shared<mio::mmap_sink>(posix_fd2fh(_fd), 0, _curMapSize);
        if (_rwmmap->is_mapped()) { // no error
            yasio::ibstream_view ibs(_rwmmap->data(), _rwmmap->length());

            if (ibs.length() > 0) {
                // count
                // key/value --> string/string
                int count = ibs.read_i7();
                for (auto i = 0; i < count; ++i) {
                    auto key = ibs.read_v();
                    auto value = ibs.read_v();
                    this->_values.emplace(key, value);
                }
            }
        }

        _initialized = true;
    }    
}

void UserDefault::flush()
{
    // TODO: Win32 store to UserDefault.plain file?
    yasio::obstream obs;
    obs.write_i7(this->_values.size());
    for (auto& item : this->_values) {
        obs.write_v(item.first);
        obs.write_v(item.second);
    }

    if (obs.length() > _curMapSize) {
        _rwmmap->unmap();
        std::error_code error;
        _curMapSize <<= 1; // X2
        _rwmmap->map(posix_fd2fh(_fd), 0, _curMapSize, error);
    }

    if (_rwmmap->is_mapped())
        memcpy(_rwmmap->data(), obs.data(), obs.length());
}

void UserDefault::deleteValueForKey(const char* key)
{
    if(this->_values.erase(key) > 0)
        flush();
}

NS_CC_END