#include "TestLayouts.h"
#include "layout/KeyGeometry.h"
#include "layout/LayoutLoader.h"

#include <QTest>
#include <xkbcommon/xkbcommon-keysyms.h>

using namespace Qt::StringLiterals;

class TestLayoutLoader : public QObject
{
    Q_OBJECT

private Q_SLOTS:
    void parsesStringAndObjectKeys()
    {
        QString error;
        const auto layout = LayoutLoader::parse(R"({
            "id": "t", "layers": [{"name": "letters", "rows": [[
                "q",
                {"label": "e", "flick": "3", "alternates": ["é", "è"]},
                {"type": "backspace", "width": 1.5}
            ]]}]
        })", &error);
        QVERIFY2(layout, qPrintable(error));

        const Row &row = layout->layers.first().rows.first();
        QCOMPARE(row.size(), 3);
        QCOMPARE(row[0].label, u"q");
        QCOMPARE(row[1].flick, u"3");
        QCOMPARE(row[1].alternates, QStringList({u"é"_s, u"è"_s}));
        QCOMPARE(row[2].type, KeyType::Backspace);
        QCOMPARE(row[2].width, 1.5);
    }

    void rejectsUnknownKeyType()
    {
        QString error;
        QVERIFY(!LayoutLoader::parse(R"({"id": "t", "layers": [{"name": "l", "rows": [[{"type": "warp"}]]}]})", &error));
        QVERIFY(error.contains(u"warp"));
    }

    void rejectsMissingId()
    {
        QString error;
        QVERIFY(!LayoutLoader::parse(R"({"layers": []})", &error));
    }

    void validateCatchesUnknownLayerTarget()
    {
        QString error;
        const auto layout = LayoutLoader::parse(
            R"({"id": "t", "layers": [{"name": "l", "rows": [[{"type": "layer", "target": "nope"}]]}]})", &error);
        QVERIFY(layout);
        QVERIFY(!LayoutLoader::validate(*layout, &error));
    }

    void templateIsValid()
    {
        QString error;
        QVERIFY2(LayoutLoader::validate(TestLayouts::builtinTemplate(), &error), qPrintable(error));
    }

    void rejectsLettersWithoutRow()
    {
        QString error;
        QVERIFY(!LayoutLoader::parse(R"({"id": "t", "layers": [{"name": "l", "rows": [[{"type": "letters"}]]}]})",
                                     &error));
    }

    // Stretch keys must even out rows whatever the keymap's letter counts.
    void builtLayersHaveEvenRows_data()
    {
        QTest::addColumn<QString>("xkbLayout");
        QTest::addColumn<KeyboardMode>("mode");
        for (const char *layout : {"us", "sk", "se", "de", "fr", "ru", "gr"}) {
            QTest::addRow("%s compact", layout) << QString::fromLatin1(layout) << KeyboardMode::Compact;
            QTest::addRow("%s full", layout) << QString::fromLatin1(layout) << KeyboardMode::Full;
        }
    }

    void builtLayersHaveEvenRows()
    {
        QFETCH(QString, xkbLayout);
        QFETCH(KeyboardMode, mode);
        const Layout layout = TestLayouts::build(qPrintable(xkbLayout), mode);
        for (const Layer &layer : layout.layers) {
            const QList<QRectF> rects = computeKeyRects(layer, {1000, 300});
            qsizetype i = 0;
            for (const Row &row : layer.rows) {
                const QRectF first = rects[i];
                const QRectF last = rects[i + row.size() - 1];
                QVERIFY2(qAbs(first.left() - rects.first().left()) < 0.01, qPrintable(layer.name));
                QVERIFY2(qAbs(last.right() - rects[layer.rows.first().size() - 1].right()) < 0.01,
                         qPrintable(layer.name));
                i += row.size();
            }
        }
    }

    void templateHasKeySections()
    {
        const Layout layout = TestLayouts::builtinTemplate();
        QStringList ids;
        for (const Section &section : layout.sections)
            ids.append(section.id);
        QCOMPARE(ids, (QStringList{u"function"_s, u"navigation"_s, u"numpad"_s}));
    }

    void parsesKeysymKeys()
    {
        QString error;
        const auto layout = LayoutLoader::parse(
            R"({"id": "t", "layers": [{"name": "l", "rows": [[{"type": "keysym", "keysym": "Home", "repeat": true}]]}]})",
            &error);
        QVERIFY2(layout, qPrintable(error));
        const KeyDef &key = layout->layers[0].rows[0][0];
        QCOMPARE(key.keysym, quint32(XKB_KEY_Home));
        QCOMPARE(key.label, u"Home"); // the keysym name unless labelled
        QVERIFY(key.repeat);
    }

    void rejectsUnknownKeysym()
    {
        QString error;
        QVERIFY(!LayoutLoader::parse(
            R"({"id": "t", "layers": [{"name": "l", "rows": [[{"type": "keysym", "keysym": "Nope"}]]}]})", &error));
    }
};

QTEST_GUILESS_MAIN(TestLayoutLoader)
#include "tst_layoutloader.moc"