#include <QtTest/QtTest>
#include <QtCore/QThread>

#include <TelepathyQt/SharedPtr>

using namespace Tp;

class TestSharedPtr : public QObject
{
    Q_OBJECT

private Q_SLOTS:
    void testSharedPtrDict();
    void testSharedPtrBoolConversion();
    void testWeakPtrBoolConversion();
    void testThreadSafety();
};

class Data;
typedef SharedPtr<Data> DataPtr;

class Data : public QObject,
             public RefCounted
{
    Q_OBJECT
    Q_DISABLE_COPY(Data);

public:
    static DataPtr create() { return DataPtr(new Data()); }
    static DataPtr createNull() { return DataPtr(0); }

private:
    Data() {}
};

void TestSharedPtr::testSharedPtrDict()
{
    QHash<DataPtr, int> dict;
    DataPtr nullPtr = Data::createNull();
    dict[nullPtr] = 1;
    QCOMPARE(dict.size(), 1);
    QCOMPARE(dict[nullPtr], 1);

    DataPtr validPtr1 = Data::create();
    QCOMPARE(qHash(validPtr1.data()), qHash(validPtr1));
    dict[validPtr1] = 2;
    QCOMPARE(dict.size(), 2);
    QCOMPARE(dict[nullPtr], 1);
    QCOMPARE(dict[validPtr1], 2);

    DataPtr validPtr2 = validPtr1;
    QCOMPARE(validPtr1.data(), validPtr2.data());
    QCOMPARE(qHash(validPtr1), qHash(validPtr2));
    dict[validPtr2] = 3;
    QCOMPARE(dict.size(), 2);
    QCOMPARE(dict[nullPtr], 1);
    QCOMPARE(dict[validPtr1], 3);
    QCOMPARE(dict[validPtr2], 3);

    DataPtr validPtrAlternative = Data::create();
    QVERIFY(validPtr1.data() != validPtrAlternative.data());
    QVERIFY(validPtr1 != validPtrAlternative);
    QVERIFY(qHash(validPtr1) != qHash(validPtrAlternative));
    dict[validPtrAlternative] = 4;
    QCOMPARE(dict.size(), 3);
    QCOMPARE(dict[nullPtr], 1);
    QCOMPARE(dict[validPtr1], 3);
    QCOMPARE(dict[validPtr2], 3);
    QCOMPARE(dict[validPtrAlternative], 4);
}

void TestSharedPtr::testSharedPtrBoolConversion()
{
    DataPtr nullPtr1;
    DataPtr nullPtr2 = Data::createNull();
    DataPtr validPtr1 = Data::create();
    DataPtr validPtr2 = validPtr1;
    DataPtr validPtrAlternative = Data::create();

    // Boolean conditions
    QVERIFY(!validPtr1.isNull());
    QVERIFY(nullPtr1.isNull());
    QVERIFY(validPtr1 ? true : false);
    QVERIFY(!validPtr1 ? false : true);
    QVERIFY(nullPtr1 ? false : true);
    QVERIFY(!nullPtr1 ? true : false);
    QVERIFY(validPtr1);
    QVERIFY(!!validPtr1);
    QVERIFY(!nullPtr1);

    // Supported operators
    QVERIFY(nullPtr1 == nullPtr1);
    QVERIFY(nullPtr1 == nullPtr2);

    QVERIFY(validPtr1 == validPtr1);
    QVERIFY(validPtr1 == validPtr2);
    QVERIFY(validPtr1 != validPtrAlternative);
    QCOMPARE(validPtr1 == validPtrAlternative, false);

    QVERIFY(validPtr1 != nullPtr1);
    QCOMPARE(validPtr1 == nullPtr1, false);

    // Supported conversions, constructors and copy operators
    bool trueBool1 = validPtr1;
    QVERIFY(trueBool1);
    bool trueBool2(validPtr2);
    QVERIFY(trueBool2);
    trueBool1 = validPtrAlternative;
    QVERIFY(trueBool1);

    bool falseBool1 = nullPtr1;
    QVERIFY(!falseBool1);
    bool falseBool2(nullPtr2);
    QVERIFY(!falseBool2);
    falseBool1 = nullPtr1;
    QVERIFY(!falseBool1);

#if 0
    // Unsupported operators, this should not compile
    bool condition;
    condition = validPtr1 > nullPtr1;
    condition = validPtr1 + nullPtr1;

    // Unsupported conversions, this should not compile
    int validInt1 = validPtr1;
    int validInt2(validPtr1);
    validInt1 = validPtr1;

    int nullInt1 = nullPtr1;
    int nullInt2(nullPtr1);
    nullInt1 = nullPtr1;

    float validFloat1 = validPtr1;
    float validFloat2(validPtr1);
    validFloat1 = validPtr1;

    float nullFloat1 = nullPtr1;
    float nullFloat2(nullPtr1);
    nullFloat1 = nullPtr1;

    Q_UNUSED(validInt1);
    Q_UNUSED(validInt2);
    Q_UNUSED(nullInt1);
    Q_UNUSED(nullInt2);
    Q_UNUSED(validFloat1);
    Q_UNUSED(validFloat2);
    Q_UNUSED(nullFloat1);
    Q_UNUSED(nullFloat2);
#endif
}

void TestSharedPtr::testWeakPtrBoolConversion()
{
    WeakPtr<Data> nullPtr1;
    DataPtr strongNullPtr2 = Data::createNull();
    WeakPtr<Data> nullPtr2 = strongNullPtr2;
    DataPtr strongValidPtr1 = Data::create();
    WeakPtr<Data> validPtr1 = strongValidPtr1;
    WeakPtr<Data> validPtr2 = validPtr1;
    DataPtr strongValidPtrAlternative = Data::create();
    WeakPtr<Data> validPtrAlternative = strongValidPtrAlternative;

    // Boolean conditions
    QVERIFY(!validPtr1.isNull());
    QVERIFY(nullPtr1.isNull());
    QVERIFY(validPtr1 ? true : false);
    QVERIFY(!validPtr1 ? false : true);
    QVERIFY(nullPtr1 ? false : true);
    QVERIFY(!nullPtr1 ? true : false);
    QVERIFY(validPtr1);
    QVERIFY(!!validPtr1);
    QVERIFY(!nullPtr1);

    // Supported operators
    QVERIFY(nullPtr1 == nullPtr1);
    QVERIFY(nullPtr1 == nullPtr2);

    QVERIFY(validPtr1 == validPtr1);
    QVERIFY(validPtr1 == validPtr2);
    // XXX why not comparison operator?
    //QVERIFY(validPtr1 != validPtrAlternative);
    //QCOMPARE(validPtr1 == validPtrAlternative, false);

    QVERIFY(validPtr1 != nullPtr1);
    QCOMPARE(validPtr1 == nullPtr1, false);

    // Supported conversions, constructors and copy operators
    bool trueBool1 = validPtr1;
    QVERIFY(trueBool1);
    bool trueBool2(validPtr2);
    QVERIFY(trueBool2);
    trueBool1 = validPtrAlternative;
    QVERIFY(trueBool1);

    bool falseBool1 = nullPtr1;
    QVERIFY(!falseBool1);
    bool falseBool2(nullPtr2);
    QVERIFY(!falseBool2);
    falseBool1 = nullPtr1;
    QVERIFY(!falseBool1);

#if 0
    // Unsupported operators, this should not compile
    bool condition;
    condition = validPtr1 > nullPtr1;
    condition = validPtr1 + nullPtr1;

    // Unsupported conversions, this should not compile
    int validInt1 = validPtr1;
    int validInt2(validPtr1);
    validInt1 = validPtr1;

    int nullInt1 = nullPtr1;
    int nullInt2(nullPtr1);
    nullInt1 = nullPtr1;

    float validFloat1 = validPtr1;
    float validFloat2(validPtr1);
    validFloat1 = validPtr1;

    float nullFloat1 = nullPtr1;
    float nullFloat2(nullPtr1);
    nullFloat1 = nullPtr1;

    Q_UNUSED(validInt1);
    Q_UNUSED(validInt2);
    Q_UNUSED(nullInt1);
    Q_UNUSED(nullInt2);
    Q_UNUSED(validFloat1);
    Q_UNUSED(validFloat2);
    Q_UNUSED(nullFloat1);
    Q_UNUSED(nullFloat2);
#endif

    // Test the boolean operations after the main SharedPtr is gone
    strongValidPtrAlternative.reset();
    QVERIFY(validPtrAlternative.isNull());
    QVERIFY(validPtrAlternative ? false : true);
    QVERIFY(!validPtrAlternative ? true : false);
}

class Thread : public QThread
{
public:
    Thread(const DataPtr &ptr, QObject *parent = 0) : QThread(parent), mPtr(ptr) {}

    void run()
    {
        QVERIFY(!mPtr.isNull());
        for (int i = 0; i < 200; ++i) {
            WeakPtr<Data> wptrtmp(mPtr);
            QVERIFY(!wptrtmp.isNull());
            DataPtr ptrtmp(wptrtmp);
            wptrtmp = WeakPtr<Data>();
            QVERIFY(!ptrtmp.isNull());

            DataPtr ptrtmp2(ptrtmp);
            ptrtmp.reset();
            QVERIFY(!ptrtmp2.isNull());
            WeakPtr<Data> wptrtmp2 = ptrtmp2;
            ptrtmp2.reset();
            QVERIFY(!wptrtmp2.isNull());

            WeakPtr<Data> wptrtmp3(wptrtmp2);
            QVERIFY(!wptrtmp3.isNull());
            wptrtmp3 = wptrtmp2;
            wptrtmp2 = WeakPtr<Data>();
            QVERIFY(!wptrtmp3.isNull());

            DataPtr ptrtmp3(wptrtmp3);
            wptrtmp3 = WeakPtr<Data>();
            QCOMPARE(ptrtmp3.data(), mPtr.data());
            QVERIFY(!ptrtmp3.isNull());

            WeakPtr<Data> wptrtmp4(ptrtmp3.data());
            ptrtmp3.reset();
            QVERIFY(!wptrtmp4.isNull());
        }
    }

private:
    DataPtr mPtr;
};

void TestSharedPtr::testThreadSafety()
{
    DataPtr ptr = Data::create();
    WeakPtr<Data> weakPtr(ptr);
    Data *savedData = ptr.data();
    QVERIFY(savedData != NULL);
    QVERIFY(!ptr.isNull());
    QVERIFY(!weakPtr.isNull());

    Thread *t[5];
    for (int i = 0; i < 5; ++i) {
        t[i] = new Thread(ptr, this);
        t[i]->start();
    }

    for (int i = 0; i < 5; ++i) {
        t[i]->wait();
        delete t[i];
    }

    QCOMPARE(ptr.data(), savedData);
    QVERIFY(!ptr.isNull());

    QVERIFY(!weakPtr.isNull());

    for (int i = 0; i < 5; ++i) {
        t[i] = new Thread(ptr, this);
        t[i]->start();
    }

    QVERIFY(!ptr.isNull());
    QVERIFY(!weakPtr.isNull());
    ptr.reset();
    QVERIFY(ptr.isNull());

    for (int i = 0; i < 5; ++i) {
        t[i]->wait();
        delete t[i];
    }

    QVERIFY(!ptr.data());
    QVERIFY(ptr.isNull());
    QVERIFY(weakPtr.isNull());

    DataPtr promotedPtr(weakPtr);
    QVERIFY(!promotedPtr.data());
    QVERIFY(promotedPtr.isNull());
}

QTEST_MAIN(TestSharedPtr)

#include "_gen/ptr.cpp.moc.hpp"