#include "AmdaResultParser.h"

#include <QObject>
#include <QtTest>

namespace {

/// Path for the tests
const auto TESTS_RESOURCES_PATH
    = QFileInfo{QString{AMDA_TESTS_RESOURCES_DIR}, "TestAmdaResultParser"}.absoluteFilePath();

QString inputFilePath(const QString &inputFileName)
{
    return QFileInfo{TESTS_RESOURCES_PATH, inputFileName}.absoluteFilePath();
}

struct ExpectedResults {
    explicit ExpectedResults() = default;

    /// Ctor with QVector<QDateTime> as x-axis data. Datetimes are converted to doubles
    explicit ExpectedResults(Unit xAxisUnit, Unit valuesUnit, const QVector<QDateTime> &xAxisData,
                             QVector<double> valuesData)
            : m_ParsingOK{true},
              m_XAxisUnit{xAxisUnit},
              m_ValuesUnit{valuesUnit},
              m_XAxisData{},
              m_ValuesData{std::move(valuesData)}
    {
        // Converts QVector<QDateTime> to QVector<double>
        std::transform(xAxisData.cbegin(), xAxisData.cend(), std::back_inserter(m_XAxisData),
                       [](const auto &dateTime) { return dateTime.toMSecsSinceEpoch() / 1000.; });
    }

    /**
     * Validates a DataSeries compared to the expected results
     * @param results the DataSeries to validate
     */
    void validate(std::shared_ptr<IDataSeries> results)
    {
        if (m_ParsingOK) {
            auto scalarSeries = dynamic_cast<ScalarSeries *>(results.get());
            QVERIFY(scalarSeries != nullptr);

            // Checks units
            QVERIFY(scalarSeries->xAxisUnit() == m_XAxisUnit);
            QVERIFY(scalarSeries->valuesUnit() == m_ValuesUnit);

            // Checks values
            QVERIFY(scalarSeries->xAxisData()->data() == m_XAxisData);
            QVERIFY(scalarSeries->valuesData()->data() == m_ValuesData);
        }
        else {
            QVERIFY(results == nullptr);
        }
    }

    // Parsing was successfully completed
    bool m_ParsingOK{false};
    // Expected x-axis unit
    Unit m_XAxisUnit{};
    // Expected values unit
    Unit m_ValuesUnit{};
    // Expected x-axis data
    QVector<double> m_XAxisData{};
    // Expected values data
    QVector<double> m_ValuesData{};
};

} // namespace

Q_DECLARE_METATYPE(ExpectedResults)

class TestAmdaResultParser : public QObject {
    Q_OBJECT
private slots:
    /// Input test data
    /// @sa testTxtJson()
    void testReadTxt_data();

    /// Tests parsing of a TXT file
    void testReadTxt();
};

void TestAmdaResultParser::testReadTxt_data()
{
    // ////////////// //
    // Test structure //
    // ////////////// //

    // Name of TXT file to read
    QTest::addColumn<QString>("inputFileName");
    // Expected results
    QTest::addColumn<ExpectedResults>("expectedResults");

}

void TestAmdaResultParser::testReadTxt()
{
    QFETCH(QString, inputFileName);
    QFETCH(ExpectedResults, expectedResults);

    // Parses file
    auto filePath = inputFilePath(inputFileName);
    auto results = AmdaResultParser::readTxt(filePath);

    // ///////////////// //
    // Validates results //
    // ///////////////// //
    expectedResults.validate(results);
}

QTEST_MAIN(TestAmdaResultParser)
#include "TestAmdaResultParser.moc"