/**
 * Copyright (c) 2025 Huawei Technologies Co., Ltd.
 * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
 * CANN Open Software License Agreement Version 2.0 (the "License").
 * Please refer to the License for details. You may not use this file except in compliance with the License.
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
 * See LICENSE in the root of the software repository for the full text of the License.
 */

/*!
 * \file auto_cast.h
 * \brief
 */

#ifndef PASS_AUTO_CAST_H_
#define PASS_AUTO_CAST_H_

#include "passes/pass_interface/pass.h"
#include "interface/function/function.h"
#include "interface/tensor/irbuilder.h"

namespace npu {
namespace tile_fwk {
class AutoCast : public Pass {
public:
    AutoCast() : Pass("AutoCast") {}
    ~AutoCast() override = default;
    Status RunOnFunction(Function& function) override;
    bool SupportBF16(Operation* op);
    bool SupportFP16(Operation* op);
    Status InsertBF16Cast(Function& function);
    Status InsertFP16Cast(Function& function);
    Status InsertInt32Fp16Cast(Function& function);
    bool IsLegalCast(DataType ds, DataType dt);
    std::vector<Operation*> GetCastChain(Operation* tailOp);
    Status ShortenChain(Function& function, const std::vector<Operation*>& castChain, Operation* tailOp);
    Status RemoveRedundantCastChain(Function& function);
    Status DefaultEnabledPreCheck(Function& function) override;
    Status PostCheck(Function& function) override;
    void InsertCastOp(
        Function& function, LogicalTensorPtr src, LogicalTensorPtr tgt, const TileShape& tileShape,
        const Operation::ScopeInfo& scopeInfo);
    Status GetInOutConnectedTensor(Function& function);
    std::set<std::pair<DataType, DataType>> legalCastPair{
        {DataType::DT_FP32, DataType::DT_FP16},  {DataType::DT_FP16, DataType::DT_FP32},
        {DataType::DT_FP32, DataType::DT_BF16},  {DataType::DT_BF16, DataType::DT_FP32},
        {DataType::DT_FP32, DataType::DT_BF16},  {DataType::DT_BF16, DataType::DT_FP32},
        {DataType::DT_FP32, DataType::DT_INT16}, {DataType::DT_INT16, DataType::DT_FP32},
        {DataType::DT_FP32, DataType::DT_INT32}, {DataType::DT_INT32, DataType::DT_FP32},
        {DataType::DT_FP16, DataType::DT_INT8},  {DataType::DT_INT8, DataType::DT_FP16},
        {DataType::DT_FP32, DataType::DT_FP32},  {DataType::DT_BF16, DataType::DT_INT32}};
    std::unordered_set<int> inCastConnectedTensors_;
    std::unordered_set<int> outCastConnectedTensors_;
    std::unordered_set<Operation*> addedCast_;

private:
    LogicalTensorPtr CreateFp32TensorLike(const LogicalTensorPtr& tensor);
    IRBuilder irBuilder_;
};
} // namespace tile_fwk
} // namespace npu
#endif // PASS_AUTO_CAST_H_