/*
 *  Created by Phil on 5/12/2012.
 *  Copyright 2012 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_CONSOLE_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_REPORTER_CONSOLE_HPP_INCLUDED

#include "catch_reporter_bases.hpp"

#include "../internal/catch_reporter_registrars.hpp"
#include "../internal/catch_console_colour.hpp"

#include <cstring>

namespace Catch {

    struct ConsoleReporter : StreamingReporterBase {
        ConsoleReporter( ReporterConfig const& _config )
        :   StreamingReporterBase( _config ),
            m_headerPrinted( false )
        {}

        virtual ~ConsoleReporter();
        static std::string getDescription() {
            return "Reports test results as plain lines of text";
        }
        virtual ReporterPreferences getPreferences() const {
            ReporterPreferences prefs;
            prefs.shouldRedirectStdOut = false;
            return prefs;
        }

        virtual void noMatchingTestCases( std::string const& spec ) {
            stream << "No test cases matched '" << spec << "'" << std::endl;
        }

        virtual void assertionStarting( AssertionInfo const& ) {
        }

        virtual bool assertionEnded( AssertionStats const& _assertionStats ) {
            AssertionResult const& result = _assertionStats.assertionResult;

            bool printInfoMessages = true;

            // Drop out if result was successful and we're not printing those
            if( !m_config->includeSuccessfulResults() && result.isOk() ) {
                if( result.getResultType() != ResultWas::Warning )
                    return false;
                printInfoMessages = false;
            }

            lazyPrint();

            AssertionPrinter printer( stream, _assertionStats, printInfoMessages );
            printer.print();
            stream << std::endl;
            return true;
        }

        virtual void sectionStarting( SectionInfo const& _sectionInfo ) {
            m_headerPrinted = false;
            StreamingReporterBase::sectionStarting( _sectionInfo );
        }
        virtual void sectionEnded( SectionStats const& _sectionStats ) {
            if( _sectionStats.missingAssertions ) {
                lazyPrint();
                Colour colour( Colour::ResultError );
                if( m_sectionStack.size() > 1 )
                    stream << "\nNo assertions in section";
                else
                    stream << "\nNo assertions in test case";
                stream << " '" << _sectionStats.sectionInfo.name << "'\n" << std::endl;
            }
            if( m_headerPrinted ) {
                if( m_config->showDurations() == ShowDurations::Always )
                    stream << "Completed in " << _sectionStats.durationInSeconds << "s" << std::endl;
                m_headerPrinted = false;
            }
            else {
                if( m_config->showDurations() == ShowDurations::Always )
                    stream << _sectionStats.sectionInfo.name << " completed in " << _sectionStats.durationInSeconds << "s" << std::endl;
            }
            StreamingReporterBase::sectionEnded( _sectionStats );
        }

        virtual void testCaseEnded( TestCaseStats const& _testCaseStats ) {
            StreamingReporterBase::testCaseEnded( _testCaseStats );
            m_headerPrinted = false;
        }
        virtual void testGroupEnded( TestGroupStats const& _testGroupStats ) {
            if( currentGroupInfo.used ) {
                printSummaryDivider();
                stream << "Summary for group '" << _testGroupStats.groupInfo.name << "':\n";
                printTotals( _testGroupStats.totals );
                stream << "\n" << std::endl;
            }
            StreamingReporterBase::testGroupEnded( _testGroupStats );
        }
        virtual void testRunEnded( TestRunStats const& _testRunStats ) {
            printTotalsDivider( _testRunStats.totals );
            printTotals( _testRunStats.totals );
            stream << std::endl;
            StreamingReporterBase::testRunEnded( _testRunStats );
        }

    private:

        class AssertionPrinter {
            void operator= ( AssertionPrinter const& );
        public:
            AssertionPrinter( std::ostream& _stream, AssertionStats const& _stats, bool _printInfoMessages )
            :   stream( _stream ),
                stats( _stats ),
                result( _stats.assertionResult ),
                colour( Colour::None ),
                message( result.getMessage() ),
                messages( _stats.infoMessages ),
                printInfoMessages( _printInfoMessages )
            {
                switch( result.getResultType() ) {
                    case ResultWas::Ok:
                        colour = Colour::Success;
                        passOrFail = "PASSED";
                        //if( result.hasMessage() )
                        if( _stats.infoMessages.size() == 1 )
                            messageLabel = "with message";
                        if( _stats.infoMessages.size() > 1 )
                            messageLabel = "with messages";
                        break;
                    case ResultWas::ExpressionFailed:
                        if( result.isOk() ) {
                            colour = Colour::Success;
                            passOrFail = "FAILED - but was ok";
                        }
                        else {
                            colour = Colour::Error;
                            passOrFail = "FAILED";
                        }
                        if( _stats.infoMessages.size() == 1 )
                            messageLabel = "with message";
                        if( _stats.infoMessages.size() > 1 )
                            messageLabel = "with messages";
                        break;
                    case ResultWas::ThrewException:
                        colour = Colour::Error;
                        passOrFail = "FAILED";
                        messageLabel = "due to unexpected exception with message";
                        break;
                    case ResultWas::DidntThrowException:
                        colour = Colour::Error;
                        passOrFail = "FAILED";
                        messageLabel = "because no exception was thrown where one was expected";
                        break;
                    case ResultWas::Info:
                        messageLabel = "info";
                        break;
                    case ResultWas::Warning:
                        messageLabel = "warning";
                        break;
                    case ResultWas::ExplicitFailure:
                        passOrFail = "FAILED";
                        colour = Colour::Error;
                        if( _stats.infoMessages.size() == 1 )
                            messageLabel = "explicitly with message";
                        if( _stats.infoMessages.size() > 1 )
                            messageLabel = "explicitly with messages";
                        break;
                    // These cases are here to prevent compiler warnings
                    case ResultWas::Unknown:
                    case ResultWas::FailureBit:
                    case ResultWas::Exception:
                        passOrFail = "** internal error **";
                        colour = Colour::Error;
                        break;
                }
            }

            void print() const {
                printSourceInfo();
                if( stats.totals.assertions.total() > 0 ) {
                    if( result.isOk() )
                        stream << "\n";
                    printResultType();
                    printOriginalExpression();
                    printReconstructedExpression();
                }
                else {
                    stream << "\n";
                }
                printMessage();
            }

        private:
            void printResultType() const {
                if( !passOrFail.empty() ) {
                    Colour colourGuard( colour );
                    stream << passOrFail << ":\n";
                }
            }
            void printOriginalExpression() const {
                if( result.hasExpression() ) {
                    Colour colourGuard( Colour::OriginalExpression );
                    stream  << "  ";
                    stream << result.getExpressionInMacro();
                    stream << "\n";
                }
            }
            void printReconstructedExpression() const {
                if( result.hasExpandedExpression() ) {
                    stream << "with expansion:\n";
                    Colour colourGuard( Colour::ReconstructedExpression );
                    stream << Text( result.getExpandedExpression(), TextAttributes().setIndent(2) ) << "\n";
                }
            }
            void printMessage() const {
                if( !messageLabel.empty() )
                    stream << messageLabel << ":" << "\n";
                for( std::vector<MessageInfo>::const_iterator it = messages.begin(), itEnd = messages.end();
                        it != itEnd;
                        ++it ) {
                    // If this assertion is a warning ignore any INFO messages
                    if( printInfoMessages || it->type != ResultWas::Info )
                        stream << Text( it->message, TextAttributes().setIndent(2) ) << "\n";
                }
            }
            void printSourceInfo() const {
                Colour colourGuard( Colour::FileName );
                stream << result.getSourceInfo() << ": ";
            }

            std::ostream& stream;
            AssertionStats const& stats;
            AssertionResult const& result;
            Colour::Code colour;
            std::string passOrFail;
            std::string messageLabel;
            std::string message;
            std::vector<MessageInfo> messages;
            bool printInfoMessages;
        };

        void lazyPrint() {

            if( !currentTestRunInfo.used )
                lazyPrintRunInfo();
            if( !currentGroupInfo.used )
                lazyPrintGroupInfo();

            if( !m_headerPrinted ) {
                printTestCaseAndSectionHeader();
                m_headerPrinted = true;
            }
        }
        void lazyPrintRunInfo() {
            stream  << "\n" << getLineOfChars<'~'>() << "\n";
            Colour colour( Colour::SecondaryText );
            stream  << currentTestRunInfo->name
                    << " is a Catch v"  << libraryVersion.majorVersion << "."
                    << libraryVersion.minorVersion << " b"
                    << libraryVersion.buildNumber;
            if( libraryVersion.branchName != std::string( "master" ) )
                stream << " (" << libraryVersion.branchName << ")";
            stream  << " host application.\n"
                    << "Run with -? for options\n\n";

            currentTestRunInfo.used = true;
        }
        void lazyPrintGroupInfo() {
            if( !currentGroupInfo->name.empty() && currentGroupInfo->groupsCounts > 1 ) {
                printClosedHeader( "Group: " + currentGroupInfo->name );
                currentGroupInfo.used = true;
            }
        }
        void printTestCaseAndSectionHeader() {
            assert( !m_sectionStack.empty() );
            printOpenHeader( currentTestCaseInfo->name );

            if( m_sectionStack.size() > 1 ) {
                Colour colourGuard( Colour::Headers );

                std::vector<SectionInfo>::const_iterator
                    it = m_sectionStack.begin()+1, // Skip first section (test case)
                    itEnd = m_sectionStack.end();
                for( ; it != itEnd; ++it )
                    printHeaderString( it->name, 2 );
            }

            SourceLineInfo lineInfo = m_sectionStack.front().lineInfo;

            if( !lineInfo.empty() ){
                stream << getLineOfChars<'-'>() << "\n";
                Colour colourGuard( Colour::FileName );
                stream << lineInfo << "\n";
            }
            stream << getLineOfChars<'.'>() << "\n" << std::endl;
        }

        void printClosedHeader( std::string const& _name ) {
            printOpenHeader( _name );
            stream << getLineOfChars<'.'>() << "\n";
        }
        void printOpenHeader( std::string const& _name ) {
            stream  << getLineOfChars<'-'>() << "\n";
            {
                Colour colourGuard( Colour::Headers );
                printHeaderString( _name );
            }
        }

        // if string has a : in first line will set indent to follow it on
        // subsequent lines
        void printHeaderString( std::string const& _string, std::size_t indent = 0 ) {
            std::size_t i = _string.find( ": " );
            if( i != std::string::npos )
                i+=2;
            else
                i = 0;
            stream << Text( _string, TextAttributes()
                                        .setIndent( indent+i)
                                        .setInitialIndent( indent ) ) << "\n";
        }

        void printTotals( Totals const& totals ) {
            int cols = 1+(int)log10( (float)std::max( totals.testCases.total(), totals.assertions.total() ) );
            if( totals.testCases.total() == 0 ) {
                stream << Colour( Colour::Warning ) << "No tests ran\n";
            }
            else if( totals.assertions.total() == 0 ) {
                stream << "test cases: ";
                printCounts( totals.testCases, cols );
                stream << "assertions: ";
                stream << Colour( Colour::Warning ) << "- none -\n";
            }
            else if( totals.assertions.failed + totals.assertions.failedButOk ) {
                stream << "test cases: ";
                printCounts( totals.testCases, cols );
                stream << "assertions: ";
                printCounts( totals.assertions, cols );
            }
            else {
                stream << Colour( Colour::ResultSuccess ) << "All tests passed";
                stream << " ("
                        << pluralise( totals.assertions.passed, "assertion" ) << " in "
                        << pluralise( totals.testCases.passed, "test case" ) << ")"
                        << "\n";
            }
        }
        void printCounts( Counts const& counts, int cols ) {
            stream  << Colour( counts.passed > 0 ? Colour::Success : Colour::LightGrey )
                    << std::setw( cols ) << counts.passed << " passed";

            stream << Colour( Colour::LightGrey ) << " | ";

            stream  << Colour( counts.failed > 0 ? Colour::ResultError : Colour::LightGrey )
                    << std::setw( cols ) << counts.failed << " failed";
            if( counts.failedButOk > 0 ) {
                stream  << Colour( Colour::LightGrey ) << " | ";
                stream  << Colour( counts.failedButOk > 0 ? Colour::ResultExpectedFailure : Colour::LightGrey )
                        << std::setw( cols ) << counts.failedButOk << " failed as expected";
            }
            stream  << Colour( Colour::LightGrey ) << " | "
                    << "total: " << counts.total() << "\n";
        }

        static std::size_t makeRatio( std::size_t number, std::size_t total ) {
            std::size_t ratio = total > 0 ? CATCH_CONFIG_CONSOLE_WIDTH * number/ total : 0;
            return ( ratio == 0 && number > 0 ) ? 1 : ratio;
        }
        static std::size_t& findMax( std::size_t& i, std::size_t& j, std::size_t& k ) {
            if( i > j && i > k )
                return i;
            else if( j > k )
                return j;
            else
                return k;
        }

        void printTotalsDivider( Totals const& totals ) {
            if( totals.testCases.total() > 0 ) {
                std::size_t failedRatio = makeRatio( totals.testCases.failed, totals.testCases.total() );
                std::size_t failedButOkRatio = makeRatio( totals.testCases.failedButOk, totals.testCases.total() );
                std::size_t passedRatio = makeRatio( totals.testCases.passed, totals.testCases.total() );
                while( failedRatio + failedButOkRatio + passedRatio < CATCH_CONFIG_CONSOLE_WIDTH-1 )
                    findMax( failedRatio, failedButOkRatio, passedRatio )++;
                while( failedRatio + failedButOkRatio + passedRatio > CATCH_CONFIG_CONSOLE_WIDTH-1 )
                    findMax( failedRatio, failedButOkRatio, passedRatio )--;

                stream << Colour( Colour::ResultSuccess ) << std::string( passedRatio, '=' );
                stream << Colour( Colour::Error ) << std::string( failedRatio, '=' );
                stream << Colour( Colour::ResultExpectedFailure ) << std::string( failedButOkRatio, '=' );
            }
            else {
                stream << Colour( Colour::Warning ) << std::string( CATCH_CONFIG_CONSOLE_WIDTH-1, '=' );
            }
            stream << "\n";
        }
        void printSummaryDivider() {
            stream << getLineOfChars<'-'>() << "\n";
        }
        template<char C>
        static char const* getLineOfChars() {
            static char line[CATCH_CONFIG_CONSOLE_WIDTH] = {0};
            if( !*line ) {
                memset( line, C, CATCH_CONFIG_CONSOLE_WIDTH-1 );
                line[CATCH_CONFIG_CONSOLE_WIDTH-1] = 0;
            }
            return line;
        }

    private:
        bool m_headerPrinted;
    };

    INTERNAL_CATCH_REGISTER_REPORTER( "console", ConsoleReporter )

} // end namespace Catch

#endif // TWOBLUECUBES_CATCH_REPORTER_CONSOLE_HPP_INCLUDED