/****************************************************************************
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtQml module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/
#ifndef QV4FUNCTIONOBJECT_H
#define QV4FUNCTIONOBJECT_H

#include "qv4global_p.h"
#include "qv4runtime_p.h"
#include "qv4engine_p.h"
#include "qv4context_p.h"
#include "qv4object_p.h"
#include "qv4string_p.h"
#include "qv4managed_p.h"
#include "qv4property_p.h"
#include "qv4objectiterator_p.h"

#include <QtCore/QString>
#include <QtCore/QHash>
#include <QtCore/QScopedPointer>
#include <cstdio>
#include <cassert>

QT_BEGIN_NAMESPACE

namespace QV4 {

struct Function;
struct Object;
struct BooleanObject;
struct NumberObject;
struct StringObject;
struct ArrayObject;
struct DateObject;
struct FunctionObject;
struct ErrorObject;
struct ArgumentsObject;
struct ExecutionContext;
struct ExecutionEngine;
class MemoryManager;

struct ObjectPrototype;
struct StringPrototype;
struct NumberPrototype;
struct BooleanPrototype;
struct ArrayPrototype;
struct FunctionPrototype;
struct DatePrototype;
struct ErrorPrototype;
struct EvalErrorPrototype;
struct RangeErrorPrototype;
struct ReferenceErrorPrototype;
struct SyntaxErrorPrototype;
struct TypeErrorPrototype;
struct URIErrorPrototype;
struct InternalClass;
struct Lookup;

struct Q_QML_EXPORT FunctionObject: Object {
    Q_MANAGED
    // Used with Managed::subType
    enum FunctionType {
        RegularFunction = 0,
        WrappedQtMethod = 1,
        BoundFunction
    };

    enum {
        Index_Prototype = 0,
        Index_ProtoConstructor = 0
    };

    ExecutionContext *scope;
    SafeString name;
    unsigned int formalParameterCount;
    unsigned int varCount;
    Function *function;
    InternalClass *protoCacheClass;
    uint protoCacheIndex;
    ReturnedValue protoValue;
    InternalClass *classForConstructor;

    FunctionObject(ExecutionContext *scope, const StringRef name, bool createProto = false);
    FunctionObject(ExecutionContext *scope, const QString &name = QString(), bool createProto = false);
    ~FunctionObject();

    void init(const StringRef name, bool createProto);

    ReturnedValue newInstance();

    static ReturnedValue construct(Managed *that, CallData *);
    static ReturnedValue call(Managed *that, CallData *d);
    inline ReturnedValue construct(CallData *callData) {
        return internalClass->vtable->construct(this, callData);
    }
    inline ReturnedValue call(CallData *callData) {
        return internalClass->vtable->call(this, callData);
    }

    static FunctionObject *cast(const Value &v) {
        return v.asFunctionObject();
    }

    static FunctionObject *creatScriptFunction(ExecutionContext *scope, Function *function);

    ReturnedValue protoProperty();
    InternalClass *internalClassForConstructor();

protected:
    FunctionObject(InternalClass *ic);

    static void markObjects(Managed *that, ExecutionEngine *e);
    static void destroy(Managed *that)
    { static_cast<FunctionObject*>(that)->~FunctionObject(); }
};

template<>
inline FunctionObject *value_cast(const Value &v) {
    return v.asFunctionObject();
}

struct FunctionCtor: FunctionObject
{
    Q_MANAGED
    FunctionCtor(ExecutionContext *scope);

    static ReturnedValue construct(Managed *that, CallData *callData);
    static ReturnedValue call(Managed *that, CallData *callData);
};

struct FunctionPrototype: FunctionObject
{
    FunctionPrototype(InternalClass *ic);
    void init(ExecutionEngine *engine, ObjectRef ctor);

    static ReturnedValue method_toString(CallContext *ctx);
    static ReturnedValue method_apply(CallContext *ctx);
    static ReturnedValue method_call(CallContext *ctx);
    static ReturnedValue method_bind(CallContext *ctx);
};

struct BuiltinFunction: FunctionObject {
    Q_MANAGED
    ReturnedValue (*code)(CallContext *);

    BuiltinFunction(ExecutionContext *scope, const StringRef name, ReturnedValue (*code)(CallContext *));

    static ReturnedValue construct(Managed *, CallData *);
    static ReturnedValue call(Managed *that, CallData *callData);
};

struct IndexedBuiltinFunction: FunctionObject
{
    Q_MANAGED

    ReturnedValue (*code)(CallContext *ctx, uint index);
    uint index;

    IndexedBuiltinFunction(ExecutionContext *scope, uint index, ReturnedValue (*code)(CallContext *ctx, uint index))
        : FunctionObject(scope)
        , code(code)
        , index(index)
    {
        setVTable(&static_vtbl);
    }

    static ReturnedValue construct(Managed *m, CallData *)
    {
        return m->engine()->currentContext()->throwTypeError();
    }

    static ReturnedValue call(Managed *that, CallData *callData);
};


struct ScriptFunction: FunctionObject {
    Q_MANAGED
    ScriptFunction(ExecutionContext *scope, Function *function);

    static ReturnedValue construct(Managed *, CallData *callData);
    static ReturnedValue call(Managed *that, CallData *callData);
};

struct SimpleScriptFunction: FunctionObject {
    Q_MANAGED
    SimpleScriptFunction(ExecutionContext *scope, Function *function);

    static ReturnedValue construct(Managed *, CallData *callData);
    static ReturnedValue call(Managed *that, CallData *callData);
};

struct BoundFunction: FunctionObject {
    Q_MANAGED
    FunctionObject *target;
    SafeValue boundThis;
    QVector<SafeValue> boundArgs;

    BoundFunction(ExecutionContext *scope, FunctionObjectRef target, const ValueRef boundThis, const QVector<SafeValue> &boundArgs);
    ~BoundFunction() {}


    static ReturnedValue construct(Managed *, CallData *d);
    static ReturnedValue call(Managed *that, CallData *dd);

    static void destroy(Managed *);
    static void markObjects(Managed *that, ExecutionEngine *e);
};

}

QT_END_NAMESPACE

#endif // QMLJS_OBJECTS_H