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/*

 *

 *  Copyright (C) 2010  Mattias Runge

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License along

 *  with this program; if not, write to the Free Software Foundation, Inc.,

 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

#include "Protocol.h"

#include <stdexcept>

#include <string.h>

#include <boost/lexical_cast.hpp>

namespace atom {

namespace can {

Protocol::Pointer Protocol::instance_;

Protocol::Protocol() : LOG("can::Protocol")

{

}

Protocol::~Protocol()

{

}

void Protocol::Create()

{

    Protocol::instance_ = Protocol::Pointer(new Protocol());

}

Protocol::Pointer Protocol::Instance()

{

    return Protocol::instance_;

}

void Protocol::Delete()

{

    Protocol::instance_.reset();

}

bool Protocol::Load(std::string filename)

{

    try

    {

        this->root_node_.LoadFile(filename);

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        return false;

    }

    LOG.Info("Protocol loaded successfully.");

    return true;

}

std::string Protocol::LookupClassName(unsigned int class_id)

{

    try

    {

        return this->root_node_.FindChild("classes").SelectChild("id", boost::lexical_cast<std::string>(class_id)).GetAttributeValue("name");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such class_id found, " + boost::lexical_cast<std::string>(class_id));

    }

}

unsigned int Protocol::ResolveClassId(std::string class_name)

{

    try

    {

        return boost::lexical_cast<unsigned int>(this->root_node_.FindChild("classes").SelectChild("name", class_name).GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such class_name found, " + class_name);

    }

}

std::string Protocol::LookupCommandName(unsigned int command_id, std::string module_name)

{

    try

    {

        if (command_id >= 128)

        {

            return this->root_node_.FindChild("commands").SelectChild("id", boost::lexical_cast<std::string>(command_id), "module", module_name).GetAttributeValue("name");

        }

        return this->root_node_.FindChild("commands").SelectChild("id", boost::lexical_cast<std::string>(command_id)).GetAttributeValue("name");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such command found, id = " + boost::lexical_cast<std::string>(command_id) + ", module = " + module_name);

    }

}

unsigned int Protocol::ResolveCommandId(std::string command_name, std::string module_name)

{

    try

    {

        return boost::lexical_cast<unsigned int >(this->root_node_.FindChild("commands").SelectChild("name", command_name, "module", module_name).GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

    }

    try

    {

        return boost::lexical_cast<unsigned int >(this->root_node_.FindChild("commands").SelectChild("name", command_name).GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such command found, name = " + command_name + ", module = " + module_name);

    }

}

std::string Protocol::LookupNMTCommandName(unsigned int command_id)

{

    try

    {

        return this->root_node_.FindChild("nmt_messages").SelectChild("id", boost::lexical_cast<std::string>(command_id)).GetAttributeValue("name");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such nmt command found, id = " + boost::lexical_cast<std::string>(command_id));

    }

}

unsigned int Protocol::ResolveNMTCommandId(std::string command_name)

{

    try

    {

        return boost::lexical_cast<unsigned int >(this->root_node_.FindChild("nmt_messages").SelectChild("name", command_name).GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such nmt command found, name = " + command_name);

    }

}

std::string Protocol::GetDefineId(std::string name, std::string group)

{

    try

    {

        return this->root_node_.FindChild("defines").SelectChild("name", name, "group", group).GetAttributeValue("id");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such define found, name = " + name + ", group = " + group);

    }

}

std::string Protocol::LookupDirectionFlag(unsigned int direction_flag)

{

    try

    {

        return this->root_node_.FindChild("defines").SelectChild("id", boost::lexical_cast<std::string>(direction_flag), "group", "DirectionFlag").GetAttributeValue("name");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such direction flag found, direction_flag = " + boost::lexical_cast<std::string>(direction_flag));

    }

}

unsigned int Protocol::ResolveDirectionFlag(std::string direction_name)

{

    try

    {

        return boost::lexical_cast<unsigned int>(this->root_node_.FindChild("defines").SelectChild("name", direction_name, "group", "DirectionFlag").GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such direction flag found, direction_name = " + direction_name);

    }

}

std::string Protocol::LookupModuleName(unsigned int module_id)

{

    try

    {

        return this->root_node_.FindChild("modules").SelectChild("id", boost::lexical_cast<std::string>(module_id)).GetAttributeValue("name");

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such module id found, " + boost::lexical_cast<std::string>(module_id));

    }

}

unsigned int Protocol::ResolveModuleId(std::string module_name)

{

    if (module_name == "")

    {

        return 0;

    }

    try

    {

        return boost::lexical_cast<unsigned int>(this->root_node_.FindChild("modules").SelectChild("name", module_name).GetAttributeValue("id"));

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("No such module name found, " + module_name);

    }

}

xml::Node::NodeList Protocol::GetCommandVariables(std::string command_name, std::string module_name)

{

    xml::Node node;

    try

    {

        node = this->root_node_.FindChild("commands").SelectChild("name", command_name, "module", module_name);

        try

        {

            return node.FindChild("variables").GetChildren();

        }

        catch (std::runtime_error& e)

        {

            return xml::Node::NodeList();

        }

    }

    catch (std::runtime_error& e)

    {

    }

    try

    {

        node = this->root_node_.FindChild("commands").SelectChild("name", command_name);

        try

        {

            return node.FindChild("variables").GetChildren();

        }

        catch (std::runtime_error& e)

        {

            return xml::Node::NodeList();

        }

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("Could not find variables for command, name = " + command_name + ", module = " + module_name);

    }

    return xml::Node::NodeList();

}

xml::Node::NodeList Protocol::GetNMTCommandVariables(std::string command_name)

{

    xml::Node node;

    try

    {

        node = this->root_node_.FindChild("nmt_messages").SelectChild("name", command_name);

        try

        {

            return node.FindChild("variables").GetChildren();

        }

        catch (std::runtime_error& e)

        {

            return xml::Node::NodeList();

        }

    }

    catch (std::runtime_error& e)

    {

        LOG.Error(e.what());

        throw std::runtime_error("Could not find variables for nmt command, name = " + command_name);

    }

    return xml::Node::NodeList();

}

std::string Protocol::DecodeInt(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length)

{

    bool sign = bitset.Get(start_bit) == 1;

    unsigned long raw_bit_value = bitset.Read(start_bit, bit_length);

    int raw_value = raw_bit_value;

    if (sign)

    {

        long mask = 0;

        for (unsigned int n = 0; n < bit_length; n++)

        {

            mask += (1 << n);

        }

        raw_value = -((~raw_bit_value) & mask);

    }

    return boost::lexical_cast<std::string>(raw_value);

}

void Protocol::EncodeInt(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length, std::string value)

{

    unsigned long raw_bit_value = 0;

    int raw_value = boost::lexical_cast<int>(value);

    raw_bit_value = raw_bit_value;

    if (raw_value < 0)

    {

        long mask = 0;

        for (unsigned int n = 0; n < bit_length; n++)

        {

            mask += (1 << n);

        }

        raw_bit_value = (~(-raw_value)) & mask;

    }

    bitset.Write(start_bit, bit_length, raw_bit_value);

}

std::string Protocol::DecodeUint(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length)

{

    unsigned long raw_bit_value = bitset.Read(start_bit, bit_length);

    //LOG.Debug("DecodeUint: raw_bit_value=" + boost::lexical_cast<std::string>(raw_bit_value));

    return boost::lexical_cast<std::string>((unsigned int)raw_bit_value);

}

void Protocol::EncodeUint(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length, std::string value)

{

    unsigned long raw_bit_value = boost::lexical_cast<unsigned int>(value);

    bitset.Write(start_bit, bit_length, raw_bit_value);

}

std::string Protocol::DecodeFloat(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length)

{

    float float_value = boost::lexical_cast<float>(this->DecodeInt(bitset, start_bit, bit_length));

    LOG.Debug("DecodeFloat::float_value1=" + boost::lexical_cast<std::string>(float_value));

    float_value = float_value / 64.0f;

    LOG.Debug("DecodeFloat::float_value2=" + boost::lexical_cast<std::string>(float_value));

    return boost::lexical_cast<std::string>(float_value);

}

void Protocol::EncodeFloat(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length, std::string value)

{

    int int_value = boost::lexical_cast<float>(value) * 64.0f;

    this->EncodeInt(bitset, start_bit, bit_length, boost::lexical_cast<std::string>(int_value));

}

std::string Protocol::DecodeAscii(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length)

{

    std::string value;

    for (unsigned int n = 0; n < bit_length; n += 8)

    {

        unsigned long raw_value = bitset.Read(start_bit + n, 8);

        value += (char)raw_value;

    }

    return value;

}

void Protocol::EncodeAscii(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length, std::string value)

{

    //LOG.Debug("EncodeAscii: " + value + ", length=" + boost::lexical_cast<std::string>(value.length()) + ", bit_length=" + boost::lexical_cast<std::string>(bit_length));

    for (unsigned int n = 0; n < bit_length; n += 8)

    {

        if (n / 8 >= value.length())

        {

            break;

        }

        //LOG.Debug(boost::lexical_cast<std::string>((unsigned int)value[n / 8]));

        bitset.Write(start_bit + n, 8, value[n / 8]);

    }

}

std::string Protocol::DecodeHexstring(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length)

{

    std::string value;

    char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

    for (unsigned int n = 0; n < bit_length; n += 4)

    {

        unsigned long raw_bit_value = bitset.Read(start_bit + n, 4);

        if (raw_bit_value >= sizeof(hex))

        {

            value += '-';

        }

        else

        {

            value += hex[raw_bit_value];

        }

    }

    return value;

}

void Protocol::EncodeHexstring(common::Bitset& bitset, unsigned int start_bit, unsigned int bit_length, std::string value)

{

    int ascii_value;

    for (unsigned int n = 0; n < bit_length; n += 4)

    {

        ascii_value = boost::lexical_cast<int>((int)std::toupper(value[n / 4]));

        if (48 <= ascii_value && ascii_value <= 57)

        {

            bitset.Write(start_bit + n, 4, ascii_value - 48);

        }

        else if (65 <= ascii_value && ascii_value <= 70)

        {

            bitset.Write(start_bit + n, 4, ascii_value - 65);

        }

        else

        {

            throw std::runtime_error("This is not an hex string, " + value);

        }

    }

}

}; // namespace can

}; // namespace atom