#include "IntNode.h"

#include "PackStream.h"
#include "IntDiff.h"
#include "Logs.h"
#include <sstream>
#include <cassert>

IntNode::IntNode(DefinitionNode* parent, const std::string &name, int value):
    DefinitionNode(parent, name, "int"), value(value)
{
}

std::string IntNode::toString(int indent) const
{
    std::ostringstream stream;

    stream << DefinitionNode::toString(indent) << " " << value;

    return stream.str();
}

void IntNode::save(PackStream *stream) const
{
    stream->write(&value);
}

void IntNode::load(PackStream *stream)
{
    stream->read(&value);
}

void IntNode::copy(DefinitionNode *destination) const
{
    if (destination->getTypeName() == getTypeName())
    {
        ((IntNode *)destination)->value = value;
    }
    else
    {
        Logs::error() << "Can't copy from " << getTypeName() << " to " << destination->getTypeName() << std::endl;
    }
}

void IntNode::setValue(int new_value)
{
    addDiff(produceDiff(new_value));
}

const IntDiff *IntNode::produceDiff(int new_value) const
{
    return new IntDiff(this, value, new_value);
}

void IntNode::generateInitDiffs(std::vector<const DefinitionDiff *> *diffs) const
{
    diffs->push_back(produceDiff(value));
}

bool IntNode::applyDiff(const DefinitionDiff *diff, bool backward)
{
    if (!DefinitionNode::applyDiff(diff, backward))
    {
        return false;
    }

    assert(diff->getTypeName() == "int");
    const IntDiff *int_diff = (const IntDiff *)diff;

    double previous = backward ? int_diff->getNewValue() : int_diff->getOldValue();
    double next = backward ? int_diff->getOldValue() : int_diff->getNewValue();

    if (value == previous)
    {
        value = next;
        return true;
    }
    else
    {
        Logs::error() << "Can't apply int diff " << previous << " => " << next << " to " << getName() << std::endl;
        return false;
    }
}