/****************************************************************************
Copyright (c) 2009, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

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.
****************************************************************************/
#include "stdneb.h"
#include "exception/exceptions.h"
#include "bxmlreader.h"

namespace IO
{
__ImplementClass(IO::BXmlReader, 'BXLR', IO::StreamReader);

using namespace Util;
#if !__OSX__    
using namespace Math;
#endif
    
//------------------------------------------------------------------------------
/**
*/
BXmlReader::BXmlReader()
{
    // empty
}

//------------------------------------------------------------------------------
/**
*/
BXmlReader::~BXmlReader()
{
    if (this->IsOpen())
    {
        this->Close();
    }
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::Open()
{
    n_assert(!this->loaderUtil.IsValid());
    n_assert(this->stream->CanBeMapped());
    if (StreamReader::Open())
    {
        // map the stream content into memory
        void* buf = this->stream->Map();
        SizeT bufSize = this->stream->GetSize();

        // setup the loader util
        this->loaderUtil.SetupFromFileInMemory(buf, bufSize);
        
        return true;
    }
    // fallthrough: some error occured
    return false;
}

//------------------------------------------------------------------------------
/**
*/
void
BXmlReader::Close()
{
    n_assert(this->loaderUtil.IsValid());
    this->loaderUtil.Discard();
    this->stream->Unmap();
    StreamReader::Close();
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::HasNode(const String& path) const
{
    n_assert(this->IsOpen());
    return (BXmlLoaderUtil::InvalidNodeIndex != this->loaderUtil.FindNodeIndex(path.AsCharPtr()));
}

//------------------------------------------------------------------------------
/**
*/
String
BXmlReader::GetCurrentNodeName() const
{
    n_assert(this->IsOpen());
    return String(this->loaderUtil.GetCurrentNodeName());
}

//------------------------------------------------------------------------------
/**
*/
String
BXmlReader::GetCurrentNodePath() const
{
    n_assert(this->IsOpen());

    // build bottom-up array of node names
    Array<String> components;
    ushort nodeIndex = this->loaderUtil.GetCurrentNodeIndex();
    while (BXmlLoaderUtil::InvalidNodeIndex != nodeIndex)
    {
        components.Append(this->loaderUtil.GetNodeName(nodeIndex));
        nodeIndex = this->loaderUtil.GetParentNodeIndex(nodeIndex);
    }

    // build top down path
    String path = "/";
    int i;
    for (i = components.Size() - 1; i >= 0; --i)
    {
        path.Append(components[i]);
        if (i > 0)
        {
            path.Append("/");
        }
    }
    return path;
}

//------------------------------------------------------------------------------
/**
*/
void
BXmlReader::SetToNode(const String& path)
{
    n_assert(this->IsOpen());
    ushort nodeIndex = this->loaderUtil.FindNodeIndex(path.AsCharPtr());
    if (BXmlLoaderUtil::InvalidNodeIndex == nodeIndex)
    {
		SYS_EXCEPT(Exceptions::SerializeException, 
			STRING_FORMAT("node not found: '%s'\n", path.AsCharPtr()),
			GET_FUNCTION_NAME()
			);
    }
    else
    {
        this->loaderUtil.SetCurrentNodeIndex(nodeIndex);
    }
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::SetToFirstChild(const String& name)
{
    n_assert(this->IsOpen());
    return this->loaderUtil.SetToFirstChild(name.AsCharPtr());
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::SetToNextChild(const String& name)
{
    n_assert(this->IsOpen());
    return this->loaderUtil.SetToNextChild(name.AsCharPtr());
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::SetToParent()
{
    n_assert(this->IsOpen());
    return this->loaderUtil.SetToParent();
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::HasAttr(const char* attr) const
{
    n_assert(this->IsOpen());
    return (BXmlLoaderUtil::InvalidAttrIndex != this->loaderUtil.FindAttrIndex(attr));
}

//------------------------------------------------------------------------------
/**
*/
Array<String>
BXmlReader::GetAttrs() const
{
    n_assert(this->IsOpen());
    Array<String> result;
    uint numAttrs = this->loaderUtil.GetNumAttrs();
    if (numAttrs > 0)
    {
        result.Reserve(numAttrs);
        uint i;
        for (i = 0; i < numAttrs; i++)
        {
            result.Append(String(this->loaderUtil.GetAttrName(i)));
        }
    }
    return result;
}

//------------------------------------------------------------------------------
/**
*/
String
BXmlReader::GetString(const char* attr) const
{
    n_assert(this->IsOpen());
    uint attrIndex = this->loaderUtil.FindAttrIndex(attr);
    if (BXmlLoaderUtil::InvalidAttrIndex == attrIndex)
    {
		SYS_EXCEPT(Exceptions::SerializeException, 
			STRING_FORMAT("attribute '%s' doesn't exist on node '%s'!", attr, this->loaderUtil.GetCurrentNodeName()),
			GET_FUNCTION_NAME()
			);
        return "";
    }
    else
    {
        return String(this->loaderUtil.GetAttrValue(attrIndex));
    }
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::GetBool(const char* attr) const
{
    return this->GetString(attr).AsBool();
}

//------------------------------------------------------------------------------
/**
*/
int
BXmlReader::GetInt(const char* attr) const
{
    return this->GetString(attr).AsInt();
}

//------------------------------------------------------------------------------
/**
*/
float
BXmlReader::GetFloat(const char* attr) const
{
    return this->GetString(attr).AsFloat();
}

#if !__OSX__
//------------------------------------------------------------------------------
/**
*/
Math::float2
BXmlReader::GetFloat2(const char* attr) const
{
    return this->GetString(attr).AsFloat2();
}

//------------------------------------------------------------------------------
/**
*/
Math::float4
BXmlReader::GetFloat4(const char* attr) const
{
#if NEBULA3_XMLREADER_LEGACY_VECTORS
    const String& float4String = this->GetString(attr);
    Array<String> tokens = float4String.Tokenize(", \t");
    if (tokens.Size() == 3)
    {
        return float4(tokens[0].AsFloat(), tokens[1].AsFloat(), tokens[2].AsFloat(), 0);
    }    
#endif
    return this->GetString(attr).AsFloat4();
}

//------------------------------------------------------------------------------
/**
*/
Math::matrix44
BXmlReader::GetMatrix44(const char* attr) const
{
    return this->GetString(attr).AsMatrix44();
}
#endif
    
//------------------------------------------------------------------------------
/**
*/
String
BXmlReader::GetOptString(const char* attr, const String& defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetString(attr);
    }
    else
    {
        return defaultValue;
    }
}

//------------------------------------------------------------------------------
/**
*/
bool
BXmlReader::GetOptBool(const char* attr, bool defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetBool(attr);
    }
    else
    {
        return defaultValue;
    }
}

//------------------------------------------------------------------------------
/**
*/
int
BXmlReader::GetOptInt(const char* attr, int defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetInt(attr);
    }
    else
    {
        return defaultValue;
    }
}

//------------------------------------------------------------------------------
/**
*/
float
BXmlReader::GetOptFloat(const char* attr, float defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetFloat(attr);
    }
    else
    {
        return defaultValue;
    }
}

#if !__OSX__    
//------------------------------------------------------------------------------
/**
*/
Math::float2
BXmlReader::GetOptFloat2(const char* attr, const Math::float2& defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetFloat2(attr);
    }
    else
    {
        return defaultValue;
    }
}

//------------------------------------------------------------------------------
/**
*/
Math::float4
BXmlReader::GetOptFloat4(const char* attr, const Math::float4& defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetFloat4(attr);
    }
    else
    {
        return defaultValue;
    }
}

//------------------------------------------------------------------------------
/**
*/
Math::matrix44
BXmlReader::GetOptMatrix44(const char* attr, const Math::matrix44& defaultValue) const
{
    if (this->HasAttr(attr))
    {
        return this->GetMatrix44(attr);
    }
    else
    {
        return defaultValue;
    }
}
#endif
    
} // namespace IO