/*
 *  Created by Phil on 26/11/2010.
 *  Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
 *
 *  Distributed under the Boost Software License, Version 1.0. (See accompanying
 *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 */
#ifndef TWOBLUECUBES_CATCH_REPORTER_JUNIT_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_REPORTER_JUNIT_HPP_INCLUDED

#include "../internal/catch_capture.hpp"
#include "../internal/catch_interfaces_reporter.h"
#include "../internal/catch_reporter_registrars.hpp"
#include "../internal/catch_xmlwriter.hpp"

#include <assert.h>

namespace Catch {

    class JunitReporter : public SharedImpl<IReporter> {

        // C++11 specific start => needs to be adjusted for pre-C++11-compilers
        typedef decltype(std::chrono::high_resolution_clock::now()) time_point;
        static time_point time_now() { return std::chrono::high_resolution_clock::now(); }
        static double time_diff(const time_point& end, const time_point& start) { return (1e-6 * std::chrono::duration_cast<std::chrono::microseconds>(end - start).count()); }
        // C++11 specific end

        struct TestStats {
            std::string m_element;
            std::string m_resultType;
            std::string m_message;
            std::string m_content;
        };

        struct TestCaseStats {

            TestCaseStats( const std::string& className, const std::string& name )
            :   m_className( className ),
                m_name( name ),
                m_startTime( time_now() ), m_endTime( m_startTime )
            {}

            std::string m_status;
            std::string m_className;
            std::string m_name;
            std::string m_stdOut;
            std::string m_stdErr;
            time_point m_startTime, m_endTime;
            std::vector<TestStats> m_testStats;
            std::vector<TestCaseStats> m_sections;
        };

        struct Stats {

            Stats( const std::string& name = std::string() )
            :   m_testsCount( 0 ),
                m_failuresCount( 0 ),
                m_disabledCount( 0 ),
                m_errorsCount( 0 ),
                m_name( name ),
                m_startTime( time_now() ), m_endTime( m_startTime )
            {}

            std::size_t m_testsCount;
            std::size_t m_failuresCount;
            std::size_t m_disabledCount;
            std::size_t m_errorsCount;
            std::string m_name;
            time_point m_startTime, m_endTime;
            std::vector<TestCaseStats> m_testCaseStats;
        };

    public:
        JunitReporter( ReporterConfig const& config )
        :   m_config( config ),
            m_testSuiteStats( "AllTests" ),
            m_currentStats( &m_testSuiteStats )
        {}
        virtual ~JunitReporter();

        static std::string getDescription() {
            return "Reports test results in an XML format that looks like Ant's junitreport target";
        }

    private: // IReporter

        virtual bool shouldRedirectStdout() const {
            return true;
        }

        virtual void StartTesting(){}

        virtual void StartGroup( const std::string& groupName ) {
            if( groupName.empty() )
                m_statsForSuites.push_back( Stats( m_config.fullConfig()->name() ) );
            else
                m_statsForSuites.push_back( Stats( groupName ) );
            m_currentStats = &m_statsForSuites.back();
        }

        virtual void EndGroup( const std::string&, const Totals& totals ) {
            m_currentStats->m_testsCount = totals.assertions.total();
            m_currentStats->m_endTime = time_now();
            m_currentStats = &m_testSuiteStats;
        }

        virtual void StartSection( const std::string&, const std::string& ){}

        virtual void NoAssertionsInSection( const std::string& ) {}
        virtual void NoAssertionsInTestCase( const std::string& ) {}

        virtual void EndSection( const std::string&, const Counts& ) {}

        virtual void StartTestCase( const Catch::TestCaseInfo& testInfo ) {
            m_currentStats->m_testCaseStats.push_back( TestCaseStats( testInfo.className, testInfo.name ) );
            m_currentTestCaseStats.push_back( &m_currentStats->m_testCaseStats.back() );
        }

        virtual void Result( const Catch::AssertionResult& assertionResult ) {
            if( assertionResult.getResultType() != ResultWas::Ok || m_config.fullConfig()->includeSuccessfulResults() ) {
                TestCaseStats& testCaseStats = m_currentStats->m_testCaseStats.back();
                TestStats stats;
                std::ostringstream oss;
                if( !assertionResult.getMessage().empty() )
                    oss << assertionResult.getMessage() << " at ";
                oss << assertionResult.getSourceInfo();
                stats.m_content = oss.str();
                stats.m_message = assertionResult.getExpandedExpression();
                stats.m_resultType = assertionResult.getTestMacroName();

                switch( assertionResult.getResultType() ) {
                    case ResultWas::ThrewException:
                        stats.m_element = "error";
                        m_currentStats->m_errorsCount++;
                        break;
                    case ResultWas::Info:
                        stats.m_element = "info"; // !TBD ?
                        break;
                    case ResultWas::Warning:
                        stats.m_element = "warning"; // !TBD ?
                        break;
                    case ResultWas::ExplicitFailure:
                        stats.m_element = "failure";
                        m_currentStats->m_failuresCount++;
                        break;
                    case ResultWas::ExpressionFailed:
                        stats.m_element = "failure";
                        m_currentStats->m_failuresCount++;
                        break;
                    case ResultWas::Ok:
                        stats.m_element = "success";
                        break;
                    case ResultWas::DidntThrowException:
                        stats.m_element = "failure";
                        m_currentStats->m_failuresCount++;
                        break;
                    case ResultWas::Unknown:
                    case ResultWas::FailureBit:
                    case ResultWas::Exception:
                        stats.m_element = "* internal error *";
                        break;
                }
                testCaseStats.m_testStats.push_back( stats );
            }
        }

        virtual void EndTestCase( const Catch::TestCaseInfo&, const Totals&, const std::string& stdOut, const std::string& stdErr ) {
            m_currentTestCaseStats.pop_back();
            assert( m_currentTestCaseStats.empty() );
            TestCaseStats& testCaseStats = m_currentStats->m_testCaseStats.back();
            testCaseStats.m_stdOut = stdOut;
            testCaseStats.m_stdErr = stdErr;
            testCaseStats.m_endTime = time_now();
            if( !stdOut.empty() )
                m_stdOut << stdOut << "\n";
            if( !stdErr.empty() )
                m_stdErr << stdErr << "\n";
        }

        virtual void Aborted() {
            // !TBD
        }

        virtual void EndTesting( const Totals& ) {
            m_testSuiteStats.m_endTime = time_now();

            XmlWriter xml( m_config.stream() );

            if( m_statsForSuites.size() > 0 )
                xml.startElement( "testsuites" );

            std::vector<Stats>::const_iterator it = m_statsForSuites.begin();
            std::vector<Stats>::const_iterator itEnd = m_statsForSuites.end();

            for(; it != itEnd; ++it ) {
                XmlWriter::ScopedElement e = xml.scopedElement( "testsuite" );
                xml.writeAttribute( "name", it->m_name );
                xml.writeAttribute( "errors", it->m_errorsCount );
                xml.writeAttribute( "failures", it->m_failuresCount );
                xml.writeAttribute( "tests", it->m_testsCount );
                xml.writeAttribute( "hostname", "tbd" );
                xml.writeAttribute( "time", time_diff(it->m_endTime, it->m_startTime) );
                xml.writeAttribute( "timestamp", "tbd" );

                OutputTestCases( xml, *it );
            }

            xml.scopedElement( "system-out" ).writeText( trim( m_stdOut.str() ), false );
            xml.scopedElement( "system-err" ).writeText( trim( m_stdErr.str() ), false );
        }

        void OutputTestCases( XmlWriter& xml, const Stats& stats ) {
            std::vector<TestCaseStats>::const_iterator it = stats.m_testCaseStats.begin();
            std::vector<TestCaseStats>::const_iterator itEnd = stats.m_testCaseStats.end();
            for(; it != itEnd; ++it ) {
                XmlWriter::ScopedElement e = xml.scopedElement( "testcase" );
                xml.writeAttribute( "classname", it->m_className );
                xml.writeAttribute( "name", it->m_name );
                xml.writeAttribute( "time", time_diff(it->m_endTime, it->m_startTime) );

                OutputTestResult( xml, *it );

                std::string stdOut = trim( it->m_stdOut );
                if( !stdOut.empty() )
                    xml.scopedElement( "system-out" ).writeText( stdOut, false );
                std::string stdErr = trim( it->m_stdErr );
                if( !stdErr.empty() )
                    xml.scopedElement( "system-err" ).writeText( stdErr, false );
            }
        }


        void OutputTestResult( XmlWriter& xml, const TestCaseStats& stats ) {
            std::vector<TestStats>::const_iterator it = stats.m_testStats.begin();
            std::vector<TestStats>::const_iterator itEnd = stats.m_testStats.end();
            for(; it != itEnd; ++it ) {
                if( it->m_element != "success" ) {
                    XmlWriter::ScopedElement e = xml.scopedElement( it->m_element );

                    xml.writeAttribute( "message", it->m_message );
                    xml.writeAttribute( "type", it->m_resultType );
                    if( !it->m_content.empty() )
                        xml.writeText( it->m_content );
                }
            }
        }

    private:
        ReporterConfig m_config;

        Stats m_testSuiteStats;
        Stats* m_currentStats;
        std::vector<Stats> m_statsForSuites;
        std::vector<const TestCaseStats*> m_currentTestCaseStats;
        std::ostringstream m_stdOut;
        std::ostringstream m_stdErr;
    };

} // end namespace Catch

#endif // TWOBLUECUBES_CATCH_REPORTER_JUNIT_HPP_INCLUDED