/*

 * Copyright (c) 2022 Huawei Device Co., Ltd.

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



#ifndef ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H

#define ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H

#include "ecmascript/compiler/builtins/builtins_stubs.h"

#include "ecmascript/js_api/js_api_queue.h"



namespace panda::ecmascript::kungfu {

class ContainersQueueStubBuilder : public BuiltinsStubBuilder {

public:

    explicit ContainersQueueStubBuilder(StubBuilder *parent, GateRef globalEnv)

        : BuiltinsStubBuilder(parent, globalEnv) {}

    ~ContainersQueueStubBuilder() override = default;

    NO_MOVE_SEMANTIC(ContainersQueueStubBuilder);

    NO_COPY_SEMANTIC(ContainersQueueStubBuilder);

    void GenerateCircuit() override {}



#define DECLARE_CONTAINERS_QUEUE_STUB_BUILDER(method, ...)           \

    void method(GateRef glue, GateRef thisValue, GateRef numArgs, Variable *result, Label *exit, Label *slowPath);

BUILTINS_WITH_CONTAINERS_QUEUE_STUB_BUILDER(DECLARE_CONTAINERS_QUEUE_STUB_BUILDER)

#undef DECLARE_CONTAINERS_QUEUE_STUB_BUILDER



    GateRef GetArrayLength(GateRef glue, GateRef obj)

    {

        auto env = GetEnvironment();

        Label entry(env);

        env->SubCfgEntry(&entry);

        Label exit(env);

        Label endGreatBeging(env);

        Label endNotGreatBeging(env);

        DEFVARIABLE(length, VariableType::INT32(), Int32(0));

        GateRef begin = LoadPrimitive(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));

        GateRef end = LoadPrimitive(VariableType::INT32(), obj, IntPtr(JSAPIQueue::TAIL_OFFSET));

        BRANCH(Int32GreaterThanOrEqual(end, begin), &endGreatBeging, &endNotGreatBeging);

        Bind(&endGreatBeging);

        {

            length = Int32Sub(end, begin);

            Jump(&exit);

        }

        Bind(&endNotGreatBeging);

        {

            GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);

            GateRef elements = Load(VariableType::JS_POINTER(), glue, obj, elementsOffset);

            GateRef elementsSize = LoadPrimitive(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));

            length = Int32Add(Int32Sub(end, begin), elementsSize);

            Jump(&exit);

        }

        Bind(&exit);

        auto ret = *length;

        env->SubCfgExit();

        return ret;

    }



    GateRef Get(GateRef glue, GateRef obj, GateRef index)

    {

        GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);

        GateRef elements = Load(VariableType::JS_POINTER(), glue, obj, elementsOffset);

        GateRef capacity = LoadPrimitive(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));

        GateRef front = LoadPrimitive(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));

        GateRef curIndex = Int32Mod(Int32Add(front, index), capacity);

        return GetValueFromTaggedArray(glue, elements, curIndex);

    }



    GateRef GetNextPosition(GateRef glue, GateRef obj, GateRef index)

    {

        GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);

        GateRef elements = Load(VariableType::JS_POINTER(), glue, obj, elementsOffset);

        GateRef elementsSize = LoadPrimitive(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));

        return Int32Mod(Int32Add(index, Int32(1)), elementsSize);

    }



    GateRef GetCurrentFront(GateRef obj)

    {

        return LoadPrimitive(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));

    }

};

}  // namespace panda::ecmascript::kungfu

#endif  // ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H