/****************************************************************************
Copyright (c) 2007, 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
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "stdneb.h"
#include "core/debug/corepagehandler.h"
#include "http/html/htmlpagewriter.h"
#include "system/systeminfo.h"
#include "core/refcounted.h"

namespace Debug
{
// TODO: Treat as warring in GCC, resolve it later
__ImplementClass(Debug::CorePageHandler, 'CPGH', Http::HttpRequestHandler);

using namespace IO;
using namespace Http;
using namespace Util;
using namespace Core;
using namespace System;

//------------------------------------------------------------------------------
/**
*/
CorePageHandler::CorePageHandler()
{
    this->SetName("Core");
    this->SetDesc("show debug information about Core subsystem");
    this->SetRootLocation("core");
}

//------------------------------------------------------------------------------
/**
*/
void
CorePageHandler::HandleRequest(const GPtr<HttpRequest>& request) 
{
    n_assert(HttpMethod::Get == request->GetMethod());

    // configure a HTML page writer
    GPtr<HtmlPageWriter> htmlWriter = HtmlPageWriter::Create();
    htmlWriter->SetStream(request->GetResponseContentStream());
    htmlWriter->SetTitle("Nebula3 Core Info");
    if (htmlWriter->Open())
    {
        htmlWriter->Element(HtmlElement::Heading1, "Core Subsystem");
        htmlWriter->AddAttr("href", "/index.html");
        htmlWriter->Element(HtmlElement::Anchor, "Home");

        // write basic system info
        htmlWriter->Element(HtmlElement::Heading3, "System Info");
        SystemInfo systemInfo;
        htmlWriter->Begin(HtmlElement::Table);        
            htmlWriter->Begin(HtmlElement::TableRow);
                htmlWriter->Element(HtmlElement::TableData, "Host Platform:");
                htmlWriter->Element(HtmlElement::TableData, SystemInfo::PlatformAsString(systemInfo.GetPlatform()));
            htmlWriter->End(HtmlElement::TableRow);
            htmlWriter->Begin(HtmlElement::TableRow);
                htmlWriter->Element(HtmlElement::TableData, "CPU Type:");
                htmlWriter->Element(HtmlElement::TableData, SystemInfo::CpuTypeAsString(systemInfo.GetCpuType()));
            htmlWriter->End(HtmlElement::TableRow);
            htmlWriter->Begin(HtmlElement::TableRow);
                htmlWriter->Element(HtmlElement::TableData, "CPU Cores:");
                htmlWriter->Element(HtmlElement::TableData, String::FromInt(systemInfo.GetNumCpuCores()));
            htmlWriter->End(HtmlElement::TableRow);
            htmlWriter->Begin(HtmlElement::TableRow);
                htmlWriter->Element(HtmlElement::TableData, "Page Size:");
                htmlWriter->Element(HtmlElement::TableData, String::FromInt(systemInfo.GetPageSize()));
            htmlWriter->End(HtmlElement::TableRow);
        htmlWriter->End(HtmlElement::Table);
            
        // if not compiled with NEBULA_DEBUG, display a message
        #if (NEBULA3_DEBUG == 0)
        htmlWriter->LineBreak();
        htmlWriter->LineBreak();
        htmlWriter->Text("RefCounted stats not available because application was not compiled with debug information!");
        #else
        htmlWriter->Element(HtmlElement::Heading3, "RefCounted Instances");
        Dictionary<String, RefCounted::Stats> refCountedStats = RefCounted::GetOverallStats();
        /// count overall number of instances
        IndexT i;
        SizeT overallNumInstances = 0;
        for (i = 0; i < refCountedStats.Size(); i++)
        {
            overallNumInstances += refCountedStats.ValueAtIndex(i).numObjects;
        }
        htmlWriter->Text("Number Of Registered Classes: " + String::FromInt(refCountedStats.Size()));
        htmlWriter->LineBreak();
        htmlWriter->Text("Overall Number Of Instances: " + String::FromInt(overallNumInstances));
        htmlWriter->LineBreak();
        htmlWriter->LineBreak();

        htmlWriter->AddAttr("border", "1");
        htmlWriter->AddAttr("rules", "cols");
        htmlWriter->Begin(HtmlElement::Table);
            htmlWriter->AddAttr("bgcolor", "lightsteelblue");
            htmlWriter->Begin(HtmlElement::TableRow);
                htmlWriter->Element(HtmlElement::TableHeader, "ClassName");
                htmlWriter->Element(HtmlElement::TableHeader, "ClassFourCC");
                htmlWriter->Element(HtmlElement::TableHeader, "InstanceSize");
                htmlWriter->Element(HtmlElement::TableHeader, "NumInstances");
                htmlWriter->Element(HtmlElement::TableHeader, "NumReferences");
            htmlWriter->End(HtmlElement::TableRow);

            for (i = 0; i < refCountedStats.Size(); i++)
            {
                const RefCounted::Stats& curStats = refCountedStats.ValueAtIndex(i);
                htmlWriter->Begin(HtmlElement::TableRow);
                    htmlWriter->Element(HtmlElement::TableData, curStats.className);
                    if (curStats.classFourCC.IsValid())
                    {
                        htmlWriter->Element(HtmlElement::TableData, curStats.classFourCC.AsString());
                    }
                    else
                    {
                        // legacy Mangalore classes have no FourCC class code
                        htmlWriter->Element(HtmlElement::TableData, "<NULL>");
                    }
                    htmlWriter->Element(HtmlElement::TableData, String::FromInt(curStats.instanceSize));
                    htmlWriter->Element(HtmlElement::TableData, String::FromInt(curStats.numObjects));
                    htmlWriter->Element(HtmlElement::TableData, String::FromInt(curStats.overallRefCount));
                htmlWriter->End(HtmlElement::TableRow);
            }
        htmlWriter->End(HtmlElement::Table);
        #endif
        htmlWriter->Close();
        request->SetStatus(HttpStatus::OK);
    }
    else
    {
        request->SetStatus(HttpStatus::InternalServerError);
    }
}

} // namespace Debug