/*
    SPDX-FileCopyrightText: 2020-2022 Volker Krause <vkrause@kde.org>
    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#ifndef KANDROIDEXTRAS_MOCK_JNIOBJECT_H
#define KANDROIDEXTRAS_MOCK_JNIOBJECT_H

#include "jni.h"
#include "kandroidextras_export.h"

#include "kandroidextras/jnisignature.h"
#include "kandroidextras/jnitypes.h"

#include <QExplicitlySharedDataPointer>
#include <QStringList>
#include <QVariant>

class MockJniObjectBasePrivate;

namespace KAndroidExtras
{
namespace Internal
{
template<typename T>
constexpr inline const char *argTypeToString()
{
    return KAndroidExtras::Jni::signature<T>();
}
template<>
constexpr inline const char *argTypeToString<jobject>()
{
    return "o";
}

class KANDROIDEXTRAS_EXPORT MockJniObjectBase
{
public:
    MockJniObjectBase();
    MockJniObjectBase(const MockJniObjectBase &);
    ~MockJniObjectBase();
    MockJniObjectBase &operator=(const MockJniObjectBase &);

    MockJniObjectBase(const char *className);

    inline MockJniObjectBase(const char *className, const char *signature)
        : MockJniObjectBase()
    {
        addToProtocol(QLatin1StringView("ctor: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(signature));
    }
    template<typename... Args>
    inline MockJniObjectBase(const char *className, const char *signature, Args...)
        : MockJniObjectBase()
    {
        addToProtocol(QLatin1StringView("ctor: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" (")
                      + (... + QLatin1StringView(KAndroidExtras::Internal::argTypeToString<Args>())) + QLatin1Char(')'));
    }

    MockJniObjectBase(jobject object);

    bool isValid() const
    {
        return true;
    }

    static QStringList m_staticProtocol;

    QStringList protocol() const;
    void addToProtocol(const QString &line) const;

protected:
    QVariant property(const QByteArray &name) const;
    void setProperty(const QByteArray &name, const QVariant &value);
    QVariant value() const;
    void setValue(const QVariant &value);
    void setData(jobject object);

    void setProtocol(const QStringList &protocol);
    QExplicitlySharedDataPointer<MockJniObjectBasePrivate> d;
};

template<typename JniObjectT>
class MockJniObject : public MockJniObjectBase
{
public:
    using MockJniObjectBase::MockJniObjectBase;
    static inline JniObjectT fromString(const QString &s)
    {
        JniObjectT o;
        o.setValue(s);
        return o;
    }
    static inline JniObjectT fromLocalRef(jobject o)
    {
        JniObjectT obj;
        obj.addToProtocol(QLatin1StringView("ctor: ") + QString::number((qulonglong)o));
        return obj;
    }
    inline QString toString() const
    {
        return value().userType() == QMetaType::QString ? value().toString() : protocol().join(QLatin1Char('\n'));
    }

    inline jobject object() const
    {
        return d.data();
    }
    template<typename T>
    inline T object() const
    {
        return {};
    }

    template<typename T, typename... Args>
    inline T callMethod(const char *methodName, const char *signature, Args...) const
    {
        const QString s = QLatin1StringView("callMethod: ") + QLatin1StringView(methodName) + QLatin1Char(' ') + QLatin1StringView(signature)
            + QLatin1StringView(" (") + (... + QLatin1StringView(KAndroidExtras::Internal::argTypeToString<Args>())) + QLatin1Char(')');
        addToProtocol(s);
        if constexpr (!std::is_same_v<T, void>) {
            return {};
        }
    }
    template<typename T>
    inline T callMethod(const char *methodName, const char *signature) const
    {
        const QString s =
            QLatin1StringView("callMethod: ") + QLatin1StringView(methodName) + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" ()");
        addToProtocol(s);
        if constexpr (!std::is_same_v<T, void>) {
            return {};
        }
    }

    template<typename... Args>
    inline JniObjectT callObjectMethod(const char *methodName, const char *signature, Args...) const
    {
        const QString s = QLatin1StringView("callObjectMethod: ") + QLatin1StringView(methodName) + QLatin1Char(' ') + QLatin1StringView(signature)
            + QLatin1StringView(" (") + (... + QLatin1StringView(KAndroidExtras::Internal::argTypeToString<Args>())) + QLatin1Char(')');
        addToProtocol(s);

        JniObjectT obj;
        obj.setProtocol(protocol());
        return obj;
    }
    inline JniObjectT callObjectMethod(const char *methodName, const char *signature) const
    {
        addToProtocol(QLatin1StringView("callObjectMethod: ") + QLatin1StringView(methodName) + QLatin1Char(' ') + QLatin1StringView(signature)
                      + QLatin1StringView(" ()"));

        JniObjectT obj;
        obj.setProtocol(protocol());
        return obj;
    }

    template<typename T>
    inline T getField(const char *fieldName) const
    {
        addToProtocol(QLatin1StringView("getField: ") + QLatin1StringView(fieldName) + QLatin1Char(' ')
                      + QLatin1StringView(KAndroidExtras::Jni::signature<T>()));
        return property(fieldName).template value<T>();
    }

    inline JniObjectT getObjectField(const char *fieldName, const char *signature) const
    {
        addToProtocol(QLatin1StringView("getObjectField: ") + QLatin1StringView(fieldName) + QLatin1Char(' ') + QLatin1StringView(signature));
        return property(fieldName).template value<JniObjectT>();
    }

    template<typename T>
    inline void setField(const char *fieldName, const char *signature, T value)
    {
        Q_UNUSED(value);
        addToProtocol(QLatin1StringView("setField: ") + QLatin1StringView(fieldName) + QLatin1Char(' ') + QLatin1StringView(signature));
        if constexpr (std::is_same_v<jobject, T>) {
            setObjectProperty(fieldName, value);
        } else {
            setProperty(fieldName, QVariant::fromValue(value));
        }
    }
    template<typename T>
    inline void setField(const char *fieldName, T value)
    {
        setField(fieldName, KAndroidExtras::Jni::signature<T>(), value);
    }

    template<typename T, typename... Args>
    static inline T callStaticMethod(const char *className, const char *methodName, const char *signature, Args...)
    {
        const QString s = QLatin1StringView("callStaticMethod: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(methodName)
            + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" (")
            + (... + QLatin1StringView(KAndroidExtras::Internal::argTypeToString<Args>())) + QLatin1Char(')');
        m_staticProtocol.push_back(s);
        if constexpr (!std::is_same_v<T, void>) {
            return {};
        }
    }
    template<typename T>
    static inline T callStaticMethod(const char *className, const char *methodName, const char *signature)
    {
        const QString s = QLatin1StringView("callStaticMethod: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(methodName)
            + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" ()");
        m_staticProtocol.push_back(s);
        if constexpr (!std::is_same_v<T, void>) {
            return {};
        }
    }

    template<typename... Args>
    static inline JniObjectT callStaticObjectMethod(const char *className, const char *methodName, const char *signature, Args...)
    {
        const QString s = QLatin1StringView("callStaticObjectMethod: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(methodName)
            + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" (")
            + (... + QLatin1StringView(KAndroidExtras::Internal::argTypeToString<Args>())) + QLatin1Char(')');
        JniObjectT obj;
        obj.addToProtocol(s);
        return obj;
    }

    static inline JniObjectT callStaticObjectMethod(const char *className, const char *methodName, const char *signature)
    {
        JniObjectT obj;
        obj.addToProtocol(QLatin1StringView("callStaticObjectMethod: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(methodName)
                          + QLatin1Char(' ') + QLatin1StringView(signature) + QLatin1StringView(" ()"));
        return obj;
    }

    static inline JniObjectT getStaticObjectField(const char *className, const char *fieldName, const char *signature)
    {
        m_staticProtocol.push_back(QLatin1StringView("getStaticObjectField: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(fieldName)
                                   + QLatin1Char(' ') + QLatin1StringView(signature));
        return {};
    }

    template<typename T>
    static inline JniObjectT getStaticObjectField(const char *className, const char *fieldName)
    {
        m_staticProtocol.push_back(QLatin1StringView("getStaticObjectField<>: ") + QLatin1StringView(className) + QLatin1Char(' ')
                                   + QLatin1StringView(fieldName));
        return {};
    }

    template<typename T>
    static inline T getStaticField(const char *className, const char *fieldName)
    {
        m_staticProtocol.push_back(QLatin1StringView("getStaticField<>: ") + QLatin1StringView(className) + QLatin1Char(' ') + QLatin1StringView(fieldName)
                                   + QLatin1Char(' ') + QLatin1StringView(KAndroidExtras::Jni::signature<T>()));
        return {};
    }

    inline void setObjectProperty(const QByteArray &name, jobject value)
    {
        JniObjectT o;
        o.setData(value);
        setProperty(name, QVariant::fromValue(o));
    }
};

}
}

#endif