/****************************************************************************
Copyright (c) 2008, 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.
****************************************************************************/

#if (__WIN32__||__APPLE__)


#include "stdneb.h"
#include "http/svg/svglinechartwriter.h"

namespace Http
{
__ImplementClass(Http::SvgLineChartWriter, 'SLCW', Http::SvgPageWriter);

using namespace Util;
using namespace Math;

//------------------------------------------------------------------------------
/**
*/
SvgLineChartWriter::SvgLineChartWriter() :
    xAxisMinVal(0),
    xAxisMaxVal(100),
    yAxisMinVal(0.0f),
    yAxisMaxVal(1.0f)
{
    // empty
}    

//------------------------------------------------------------------------------
/**
*/
SvgLineChartWriter::~SvgLineChartWriter()
{
    // empty
}

//------------------------------------------------------------------------------
/**
*/
bool
SvgLineChartWriter::Open()
{
    // always set virtual dimensions to 1000x250
    this->SetUnitDimensions(1200, 250);
    return SvgPageWriter::Open();
}

//------------------------------------------------------------------------------
/**
*/
void
SvgLineChartWriter::SetupXAxis(const String& axisName, const String& unitName, int minVal, int maxVal)
{
    n_assert(maxVal > minVal);
    this->xAxisName = axisName;
    this->xAxisUnitName = unitName;
    this->xAxisMinVal = minVal;
    this->xAxisMaxVal = maxVal;
}

//------------------------------------------------------------------------------
/**
*/
void
SvgLineChartWriter::SetupYAxis(const String& axisName, const String& unitName, float minVal, float maxVal)
{
    n_assert(maxVal > minVal);
    this->yAxisName = axisName;
    this->yAxisUnitName = unitName;
    this->yAxisMinVal = minVal;
    this->yAxisMaxVal = maxVal;
}

//------------------------------------------------------------------------------
/**
*/
void
SvgLineChartWriter::AddTrack(const String& name, const String& color, const Array<float>& values)
{
    n_assert(values.Size() > 0);
    Track newTrack;
    this->tracks.Append(newTrack);
    this->tracks.Back().name = name;
    this->tracks.Back().color = color;
    this->tracks.Back().values = values;
}

//------------------------------------------------------------------------------
/**
*/
void 
SvgLineChartWriter::AddTrack(const Util::String& name, const Util::String& color, const Util::Array<float>& values, const Util::Array<Timing::Tick>& timeStamps)
{    
    n_assert(values.Size() > 0);
    n_assert(values.Size() == timeStamps.Size());
    Track newTrack;
    this->tracks.Append(newTrack);
    this->tracks.Back().name = name;
    this->tracks.Back().color = color;
    this->tracks.Back().values = values;
    this->tracks.Back().times = timeStamps;

}
//------------------------------------------------------------------------------
/**
*/
void
SvgLineChartWriter::Draw()
{
    // establish a transform for the main diagram
    this->BeginTransformGroup(float2(10.0f, 10.0f), 0.0f, float2(1.0f, 1.0f));
    
    // draw light-weight helper lines
    this->BeginPaintGroup("grey", "grey", 1);
    this->Line(0, 0,   1000, 0);
    this->Line(0, 50,  1000, 50);
    this->Line(0, 100, 1000, 100);
    this->Line(0, 150, 1000, 150);
    this->EndGroup();

    // draw the main diagram axis
    this->BeginPaintGroup("black", "black", 2);
    this->Line(0, 0, 0, 200);           // left y-axis
    this->Line(1000, 0, 1000, 200);     // right y-axis
    this->Line(0, 200, 1000, 200);      // x-axis
    this->EndGroup();

    // for each track...
    IndexT trackIndex;
    for (trackIndex = 0; trackIndex < this->tracks.Size(); trackIndex++)
    {
        const Track& curTrack = this->tracks[trackIndex];
        float x = 0.0f;
        float dx = 1.0f / (this->xAxisMaxVal - this->xAxisMinVal);
        float minVal = 1000000.0f;
        float maxVal = -1000000.0f;
        float avgVal = 0.0f;
        IndexT valIndex = 0;
        SizeT batchSize = 100;
        Array<float2> points(batchSize + 1, 0);
        Array<Util::String> timeText(batchSize + 1, 0);
        this->BeginPaintGroup("none", curTrack.color, 2);
        while (valIndex < curTrack.values.Size())
        {
            // need to render points in chunks of 100 due to a limitation
            // in TinyXML(?), XML attribute values are limited to about 4096 characters
            float curValue;
            float curY = 0.0f;
            IndexT i;
            for (i = 0; (i < batchSize) && (valIndex < curTrack.values.Size()); i++)
            {
                curValue = curTrack.values[valIndex++];
                curY = 1.0f - (curValue - this->yAxisMinVal) / (this->yAxisMaxVal - this->yAxisMinVal);
                points.Append(float2(1000.0f * x, 200.0f * curY));
                x += dx;
                minVal = n_min(minVal, curValue);
                maxVal = n_max(maxVal, curValue);
                avgVal += curValue;  
                if (curTrack.times.Size() > 0)
                {           
                    timeText.Append(Util::String::FromFloat((float)Timing::TicksToSeconds(curTrack.times[i])));
                }
            }
            this->PolyLine(points);
            
            if (curTrack.times.Size() > 0)
            {       
                this->EndGroup();
                this->BeginTextGroup(8, "black"); 
                IndexT txtIdx;
                for (txtIdx = 0; txtIdx < timeText.Size(); ++txtIdx)
                {
                    this->Text(points[txtIdx].x(), 210, timeText[txtIdx]);      	
                }
                this->EndGroup();
                this->BeginPaintGroup("none", curTrack.color, 2);
                timeText.Clear();
            }

            // prepare next batch
            points.Clear();
            points.Append(float2(1000.f * (x - dx), 200.0f * curY));
        }
        this->EndGroup();
        // compute average value
        avgVal /= curTrack.values.Size();

        // draw min/max/avg lines
        float minY = 1.0f - (minVal - this->yAxisMinVal) / (this->yAxisMaxVal - this->yAxisMinVal);
        float maxY = 1.0f - (maxVal - this->yAxisMinVal) / (this->yAxisMaxVal - this->yAxisMinVal);
        float avgY = 1.0f - (avgVal - this->yAxisMinVal) / (this->yAxisMaxVal - this->yAxisMinVal);
        this->BeginPaintGroup("none", curTrack.color, 1);
        this->Line(0.0f, 200.0f * minY, 1000.0f, 200.0f * minY);
        this->Line(0.0f, 200.0f * maxY, 1000.0f, 200.0f * maxY);
        this->Line(0.0f, 200.0f * avgY, 1000.0f, 200.0f * avgY);
        this->EndGroup();

        // draw min/max/avg text
        String minText;
        String maxText;
        String avgText;
        maxText.Format("max = %.3f", maxVal);
        if (avgVal != maxVal) avgText.Format("avg = %.3f", avgVal);
        if (maxVal != minVal) minText.Format("min = %.3f", minVal);                              

        this->BeginTextGroup(10, curTrack.color);                                                        
        this->Text(1010.0f, 200.0f * maxY, maxText);
        float curOffset = 0;
        const float minDist = 0.04f;
        if (avgY - maxY < minDist)
        {
            avgY += minDist;
            curOffset = minDist;
        }
        if (avgText.IsValid()) this->Text(1010.0f, 200.0f * avgY, avgText);
        if (minY + curOffset - avgY < minDist) minY += curOffset + minDist;
        if (minText.IsValid()) this->Text(1010.0f, 200.0f * minY, minText);        
        this->EndGroup();
    }
    this->EndGroup();
}

} // namespace Http

#endif