/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the  "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Base header file.  Must be first.
#include <xalanc/Include/PlatformDefinitions.hpp>



#include <cstdio>
#include <ctime>

#include <iostream>



#include <xercesc/util/PlatformUtils.hpp>

#include <xalanc/PlatformSupport/DOMStringHelper.hpp>
#include <xalanc/XalanTransformer/XalanTransformer.hpp>

#include <xalanc/Harness/XalanXMLFileReporter.hpp>
#include <xalanc/Harness/XalanFileUtility.hpp>


// This is here for memory leak testing.
#if !defined(NDEBUG) && defined(_MSC_VER)
#include <crtdbg.h>
#endif



using std::cerr;
using std::cout;
using std::endl;



const char* const   excludeStylesheets[] =
{
    "large-evans_large.xsl",
    0
};




inline bool
checkForExclusion(const xalanc::XalanDOMString&   currentFile)
{
    for (int i=0; excludeStylesheets[i] != 0; i++)
    {   
        if (currentFile == xalanc::XalanDOMString(excludeStylesheets[i]))
        {
            return true;
        }
    }
    return false;
}

inline double
calculateElapsedTime(
            clock_t     theStartTime,
            clock_t     theEndTime)
{
    return double(theEndTime - theStartTime) / CLOCKS_PER_SEC * 1000.0;
}


inline double
calculateAvgTime(
            clock_t     accTime,
            long        theIterationCount)
{
    assert(theIterationCount > 1);

    return double(accTime) / theIterationCount;
}



void
setHelp(xalanc::XalanFileUtility& h)
{
    h.args.getHelpStream() << endl
         << "Perft dir [-out -sub -i -iter]"
         << endl
         << endl
         << "dir        ( base directory for testcases)"
         << endl
         << "-out dir   ( base directory for output)"
         << endl
         << "-sub dir   ( run files only from a specific directory)"
         << endl
         << "-i     ( include all testcases )"
         << endl
         << "-iter num  (specifies number of iterations; must be > 0)"
         << endl;
}



int
runTests(
            int     argc,
            char*   argv[])
{
    // Just hoist everything...
    using namespace xalanc;

    MemoryManager& theManager = XalanMemMgrs::getDefaultXercesMemMgr();

    XalanFileUtility    h(theManager);

    // Set the program help string,  then get the command line parameters.
    //
    setHelp(h);

    bool setGold = false;

    const XalanDOMString    processorType("XalanC");

    if (h.getParams(argc, argv, "PERFT-RESULTS", setGold) == true)
    {
        XalanTransformer xalan;

        // Generate Unique Run id and processor info
        XalanDOMString UniqRunid;
        h.generateUniqRunid(UniqRunid);


        // Defined basic constants for file manipulation and open results file
        const XalanDOMString  resultFilePrefix("cpp");
        XalanDOMString  resultsFile= h.args.output;
        resultsFile += resultFilePrefix;
        resultsFile += UniqRunid;
        resultsFile += XalanFileUtility::s_xmlSuffix;


        XalanXMLFileReporter    logFile(theManager, resultsFile);
        logFile.logTestFileInit("Performance Testing - Reports various performance metrics using the Transformer");

        // Get the list of sub-directories below "base" and iterate through them
        bool foundDir = false;      // Flag indicates directory found. Used in conjunction with -sub cmd-line arg.

        typedef XalanFileUtility::FileNameVectorType        FileNameVectorType;

        FileNameVectorType dirs;
        h.getDirectoryNames(h.args.base, dirs);

        for(FileNameVectorType::size_type   j = 0; j < dirs.size(); j++)
        {
            // Run specific category of files from given directory
            if (length(h.args.sub) > 0 && !equals(dirs[j], h.args.sub))
            {
                continue;
            }

            cout << "Processing files in Directory: " << dirs[j] << endl;

            // Check that output directory is there.
            XalanDOMString  theOutputDir = h.args.output;
            theOutputDir += dirs[j];
            h.checkAndCreateDir(theOutputDir);

                    
            // Indicate that directory was processed and get test files from the directory
            foundDir = true;
            FileNameVectorType files;
            h.getTestFileNames(h.args.base, dirs[j], false, files);
            XalanDOMString logEntry;
            logEntry = "Performance Directory: ";
            logEntry += dirs[j];
            logFile.logTestCaseInit(logEntry);

            const long  iterCount = h.args.iters;

            for(FileNameVectorType::size_type i = 0; i < files.size(); i++)
            {
                // Define  variables used for timing and reporting ...
                clock_t startTime, endTime, accmTime, avgEtoe;
                double timeinMilliseconds = 0, theAverage =0;
                int transformResult = 0;

                typedef XalanXMLFileReporter::Hashtable Hashtable;

                Hashtable attrs(theManager);

                attrs.insert(Hashtable::value_type(XalanDOMString("idref"), files[i]));
                attrs.insert(Hashtable::value_type(XalanDOMString("UniqRunid"),UniqRunid));
                attrs.insert(Hashtable::value_type(XalanDOMString("processor"),processorType));
                logFile.addMetricToAttrs("Iterations",iterCount, attrs);
                                
                if (h.args.skip)
                {
                    if (checkForExclusion(files[i]))
                        continue;
                }

                XalanDOMString  theXSLFile = h.args.base;
                theXSLFile += dirs[j];
                theXSLFile += XalanFileUtility::s_pathSep;
                theXSLFile += files[i];

                XalanDOMString  theXMLFile; 
                h.generateFileName(theXSLFile,"xml", theXMLFile);

                XalanDOMString  outbase = h.args.output;
                outbase += dirs[j];
                outbase += XalanFileUtility::s_pathSep;
                outbase += files[i]; 
                XalanDOMString  theOutputFile;
                h.generateFileName(outbase, "out", theOutputFile);

                const XSLTInputSource   xslInputSource(theXSLFile);
                const XSLTInputSource   xmlInputSource(theXMLFile);
                const XSLTResultTarget  theResultTarget(theOutputFile);

                attrs.insert(Hashtable::value_type(XalanDOMString("href"), theXSLFile));
                cout << endl << files[i] << endl;

                // Time the parsing(compile) of the XSL stylesheet and report the results..
                //
                startTime = clock();
                const XalanCompiledStylesheet*  compiledSS = 0;
                xalan.compileStylesheet(xslInputSource, compiledSS);
                endTime = clock();

                if (compiledSS == 0)
                {
                    continue;
                }

                timeinMilliseconds = calculateElapsedTime(startTime, endTime);
                cout << "   XSL: " << timeinMilliseconds << " milliseconds, Parse" << endl;
                logFile.addMetricToAttrs("parsexsl",timeinMilliseconds, attrs); 

                // Time the parsing of the input XML and report the results..
                //
                startTime = clock();
                const XalanParsedSource*    parsedSource = 0;
                xalan.parseSource(xmlInputSource, parsedSource);
                endTime = clock();

                if (parsedSource == 0)
                {
                    continue;
                }

                timeinMilliseconds = calculateElapsedTime(startTime, endTime);
                cout << "   XML: " << timeinMilliseconds << " milliseconds, Parse" <<endl;
                logFile.addMetricToAttrs("parsexml",timeinMilliseconds, attrs);

                // Perform One transform using parsed stylesheet and unparsed xml source, report results...
                // 
                startTime = clock();
                    transformResult = xalan.transform(xmlInputSource, compiledSS, theResultTarget);
                endTime = clock();
                if(!transformResult)
                {
                    timeinMilliseconds = calculateElapsedTime(startTime, endTime);
                    cout << endl << "   One: " << timeinMilliseconds << " w/Parsed XSL." << endl;
                    logFile.addMetricToAttrs("single", timeinMilliseconds, attrs);  
                }
                else
                {
                    cout << xalan.getLastError();
                    return -1;
                }

                // Do One eTOe transform with no pre parsing of either xsl or xml files.
                // And output metrics to console and result log
                startTime = clock();
                    transformResult = xalan.transform(xmlInputSource, xslInputSource, theResultTarget);
                endTime = clock();
                if(!transformResult)
                {
                    timeinMilliseconds = calculateElapsedTime(startTime, endTime);
                    cout << "   One: " << timeinMilliseconds << " eTOe." << endl;
                    logFile.addMetricToAttrs("etoe", timeinMilliseconds, attrs);    
                }
                else
                {
                    cout << xalan.getLastError();
                    return -1;
                }


                // Perform multiple transforms and calculate the average time ..
                // These are done 3 different ways.
                //
                // FIRST: Parsed XSL Stylesheet and Parsed XML Source.
                //
                accmTime = 0;
                for(int j = 0; j < iterCount; ++j)
                {   
                    startTime = clock();
                        transformResult = xalan.transform(*parsedSource, compiledSS, theResultTarget);
                    endTime = clock();
                    
                    accmTime += endTime - startTime;
                }

                theAverage = calculateAvgTime(accmTime, iterCount); 
                cout << endl << "   Avg: " << theAverage << " for " << iterCount << " iter's w/Parsed files" << endl;
                logFile.addMetricToAttrs("avgparsedxml",theAverage, attrs);
                

                // SECOND: Parsed Stylesheet and UnParsed XML Source.
                // This is currently how the XalanJ 2.0 is performing transforms
                //
                accmTime = 0;
                for(int k = 0; k < iterCount; ++k)
                {
                    startTime = clock();
                        transformResult = xalan.transform(xmlInputSource, compiledSS, theResultTarget);
                    endTime = clock();
                    
                    accmTime += endTime - startTime;                        
                }
                theAverage = calculateAvgTime(accmTime, iterCount);
                cout << "   Avg: " << theAverage << " for " << iterCount << " iter's w/UnParsed XML" << endl;
                logFile.addMetricToAttrs("avgunparsedxml",theAverage, attrs);


                // THIRD: Neither Stylesheet nor XML Source are parsed.
                // Perform multiple etoe transforms and calculate the average ...
                //
                avgEtoe = 0;
                for(int jj = 0; jj < iterCount; ++jj)
                {   
                    startTime = clock();
                        transformResult = xalan.transform(xmlInputSource, xslInputSource, theResultTarget);
                    endTime = clock();
                    
                    avgEtoe += endTime - startTime;                     
                }
                theAverage = calculateAvgTime(avgEtoe,iterCount);

                // Output average transform time to console and result log
                cout << "   Avg: " << theAverage << " for " << iterCount << " iter's of eToe" << endl;
                logFile.addMetricToAttrs("avgetoe",theAverage, attrs);

                logFile.logElementWAttrs(10, "perf", attrs, "xxx");

                xalan.destroyParsedSource(parsedSource);
                xalan.destroyStylesheet(compiledSS);

            }

            logEntry = "Performance Directory: ";
            logEntry += dirs[j];
            logFile.logTestCaseClose(logEntry, XalanDOMString("Done"));
        }

        // Check to see if -sub cmd-line directory was processed correctly.
        if (!foundDir)
        {
            cout << "Specified test directory: \"" << c_str(TranscodeToLocalCodePage(h.args.sub)) << "\" not found" << endl;
        }

        h.reportPassFail(logFile, UniqRunid);
        logFile.logTestFileClose("Performance", "Done");
        logFile.close();
    }

    return 0;
}



int
main(
            int     argc,
            char*   argv[])
{
#if !defined(NDEBUG) && defined(_MSC_VER)
    _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_LEAK_CHECK_DF);
    _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
    _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
#endif

    int theResult = 0;

    try
    {
        using xercesc::XMLPlatformUtils;
        using xalanc::XalanTransformer;

        // Call the static initializers for xerces and xalan, and create a transformer
        //
        XMLPlatformUtils::Initialize();

        XalanTransformer::initialize();

        theResult = runTests(argc, argv);

        XalanTransformer::terminate();

        XMLPlatformUtils::Terminate();

        XalanTransformer::ICUCleanUp();
    }
    catch(...)
    {
        cerr << "Initialization failed!" << endl << endl;

        theResult = -1;
    }

    return theResult;
}