/*
 *  Created by Martin on 2017-11-14.
 *
 *  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)
 */

#include "catch_reporter_compact.h"

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

namespace {

#ifdef CATCH_PLATFORM_MAC
    const char* failedString() { return "FAILED"; }
    const char* passedString() { return "PASSED"; }
#else
    const char* failedString() { return "failed"; }
    const char* passedString() { return "passed"; }
#endif

    // Colour::LightGrey
    Catch::Colour::Code dimColour() { return Catch::Colour::FileName; }

    std::string bothOrAll( std::size_t count ) {
        return count == 1 ? std::string() :
               count == 2 ? "both " : "all " ;
    }

} // anon namespace


namespace Catch {
namespace {
// Colour, message variants:
// - white: No tests ran.
// -   red: Failed [both/all] N test cases, failed [both/all] M assertions.
// - white: Passed [both/all] N test cases (no assertions).
// -   red: Failed N tests cases, failed M assertions.
// - green: Passed [both/all] N tests cases with M assertions.
void printTotals(std::ostream& out, const Totals& totals) {
    if (totals.testCases.total() == 0) {
        out << "No tests ran.";
    } else if (totals.testCases.failed == totals.testCases.total()) {
        Colour colour(Colour::ResultError);
        const std::string qualify_assertions_failed =
            totals.assertions.failed == totals.assertions.total() ?
            bothOrAll(totals.assertions.failed) : std::string();
        out <<
            "Failed " << bothOrAll(totals.testCases.failed)
            << pluralise(totals.testCases.failed, "test case") << ", "
            "failed " << qualify_assertions_failed <<
            pluralise(totals.assertions.failed, "assertion") << '.';
    } else if (totals.assertions.total() == 0) {
        out <<
            "Passed " << bothOrAll(totals.testCases.total())
            << pluralise(totals.testCases.total(), "test case")
            << " (no assertions).";
    } else if (totals.assertions.failed) {
        Colour colour(Colour::ResultError);
        out <<
            "Failed " << pluralise(totals.testCases.failed, "test case") << ", "
            "failed " << pluralise(totals.assertions.failed, "assertion") << '.';
    } else {
        Colour colour(Colour::ResultSuccess);
        out <<
            "Passed " << bothOrAll(totals.testCases.passed)
            << pluralise(totals.testCases.passed, "test case") <<
            " with " << pluralise(totals.assertions.passed, "assertion") << '.';
    }
}

// Implementation of CompactReporter formatting
class AssertionPrinter {
public:
    AssertionPrinter& operator= (AssertionPrinter const&) = delete;
    AssertionPrinter(AssertionPrinter const&) = delete;
    AssertionPrinter(std::ostream& _stream, AssertionStats const& _stats, bool _printInfoMessages)
        : stream(_stream)
        , result(_stats.assertionResult)
        , messages(_stats.infoMessages)
        , itMessage(_stats.infoMessages.begin())
        , printInfoMessages(_printInfoMessages) {}

    void print() {
        printSourceInfo();

        itMessage = messages.begin();

        switch (result.getResultType()) {
        case ResultWas::Ok:
            printResultType(Colour::ResultSuccess, passedString());
            printOriginalExpression();
            printReconstructedExpression();
            if (!result.hasExpression())
                printRemainingMessages(Colour::None);
            else
                printRemainingMessages();
            break;
        case ResultWas::ExpressionFailed:
            if (result.isOk())
                printResultType(Colour::ResultSuccess, failedString() + std::string(" - but was ok"));
            else
                printResultType(Colour::Error, failedString());
            printOriginalExpression();
            printReconstructedExpression();
            printRemainingMessages();
            break;
        case ResultWas::ThrewException:
            printResultType(Colour::Error, failedString());
            printIssue("unexpected exception with message:");
            printMessage();
            printExpressionWas();
            printRemainingMessages();
            break;
        case ResultWas::FatalErrorCondition:
            printResultType(Colour::Error, failedString());
            printIssue("fatal error condition with message:");
            printMessage();
            printExpressionWas();
            printRemainingMessages();
            break;
        case ResultWas::DidntThrowException:
            printResultType(Colour::Error, failedString());
            printIssue("expected exception, got none");
            printExpressionWas();
            printRemainingMessages();
            break;
        case ResultWas::Info:
            printResultType(Colour::None, "info");
            printMessage();
            printRemainingMessages();
            break;
        case ResultWas::Warning:
            printResultType(Colour::None, "warning");
            printMessage();
            printRemainingMessages();
            break;
        case ResultWas::ExplicitFailure:
            printResultType(Colour::Error, failedString());
            printIssue("explicitly");
            printRemainingMessages(Colour::None);
            break;
            // These cases are here to prevent compiler warnings
        case ResultWas::Unknown:
        case ResultWas::FailureBit:
        case ResultWas::Exception:
            printResultType(Colour::Error, "** internal error **");
            break;
        }
    }

private:
    void printSourceInfo() const {
        Colour colourGuard(Colour::FileName);
        stream << result.getSourceInfo() << ':';
    }

    void printResultType(Colour::Code colour, std::string const& passOrFail) const {
        if (!passOrFail.empty()) {
            {
                Colour colourGuard(colour);
                stream << ' ' << passOrFail;
            }
            stream << ':';
        }
    }

    void printIssue(std::string const& issue) const {
        stream << ' ' << issue;
    }

    void printExpressionWas() {
        if (result.hasExpression()) {
            stream << ';';
            {
                Colour colour(dimColour());
                stream << " expression was:";
            }
            printOriginalExpression();
        }
    }

    void printOriginalExpression() const {
        if (result.hasExpression()) {
            stream << ' ' << result.getExpression();
        }
    }

    void printReconstructedExpression() const {
        if (result.hasExpandedExpression()) {
            {
                Colour colour(dimColour());
                stream << " for: ";
            }
            stream << result.getExpandedExpression();
        }
    }

    void printMessage() {
        if (itMessage != messages.end()) {
            stream << " '" << itMessage->message << '\'';
            ++itMessage;
        }
    }

    void printRemainingMessages(Colour::Code colour = dimColour()) {
        if (itMessage == messages.end())
            return;

        // using messages.end() directly yields (or auto) compilation error:
        std::vector<MessageInfo>::const_iterator itEnd = messages.end();
        const std::size_t N = static_cast<std::size_t>(std::distance(itMessage, itEnd));

        {
            Colour colourGuard(colour);
            stream << " with " << pluralise(N, "message") << ':';
        }

        for (; itMessage != itEnd; ) {
            // If this assertion is a warning ignore any INFO messages
            if (printInfoMessages || itMessage->type != ResultWas::Info) {
                stream << " '" << itMessage->message << '\'';
                if (++itMessage != itEnd) {
                    Colour colourGuard(dimColour());
                    stream << " and";
                }
            }
        }
    }

private:
    std::ostream& stream;
    AssertionResult const& result;
    std::vector<MessageInfo> messages;
    std::vector<MessageInfo>::const_iterator itMessage;
    bool printInfoMessages;
};

} // anon namespace

        std::string CompactReporter::getDescription() {
            return "Reports test results on a single line, suitable for IDEs";
        }

        ReporterPreferences CompactReporter::getPreferences() const {
            return m_reporterPrefs;
        }

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

        void CompactReporter::assertionStarting( AssertionInfo const& ) {}

        bool CompactReporter::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;
            }

            AssertionPrinter printer( stream, _assertionStats, printInfoMessages );
            printer.print();

            stream << std::endl;
            return true;
        }

        void CompactReporter::sectionEnded(SectionStats const& _sectionStats) {
            if (m_config->showDurations() == ShowDurations::Always) {
                stream << getFormattedDuration(_sectionStats.durationInSeconds) << " s: " << _sectionStats.sectionInfo.name << std::endl;
            }
        }

        void CompactReporter::testRunEnded( TestRunStats const& _testRunStats ) {
            printTotals( stream, _testRunStats.totals );
            stream << '\n' << std::endl;
            StreamingReporterBase::testRunEnded( _testRunStats );
        }

        CompactReporter::~CompactReporter() {}

    CATCH_REGISTER_REPORTER( "compact", CompactReporter )

} // end namespace Catch
