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#ifndef TIM_LAYOUT_INFER_ElEMENTWISE_LAYOUT_INFERENCE_H_
#define TIM_LAYOUT_INFER_ElEMENTWISE_LAYOUT_INFERENCE_H_

#include "tim/vx/ops/elementwise.h"

#include "ops/op_layout_inference.h"
#include "permute_vector.h"
#include "builtin_op_impl.h"

namespace tim {
namespace transform {
template <typename OpType>
class ElementWiseLayoutInfer : public OpLayoutInfer {
 public:
  ElementWiseLayoutInfer(
      const std::shared_ptr<vx::Operation> op,
      std::shared_ptr<layout_inference_impl::LayoutInferContext>& context)
      : OpLayoutInfer(op, context) {}

  void OnInputs(
      std::vector<std::shared_ptr<vx::Tensor>>& next_tensors) override {
    auto in_0 = op_->impl()->InputsTensor()[0];
    auto in_1 = op_->impl()->InputsTensor()[1];
    std::shared_ptr<tim::vx::Tensor> short_tensor =
        in_0->GetShape().size() > in_1->GetShape().size() ? in_1 : in_0;
    std::shared_ptr<tim::vx::Tensor> long_tensor =
        in_0->GetShape().size() < in_1->GetShape().size() ? in_1 : in_0;
    if (in_0->GetSpec().attr_ != tim::vx::CONSTANT &&
        in_1->GetSpec().attr_ != tim::vx::CONSTANT &&
        in_0->GetShape().size() != in_1->GetShape().size()) {
      auto pv_long = context_->GetPermuteVector(long_tensor);
      auto pv_short = context_->GetPermuteVector(short_tensor);
      auto rank_long = pv_long->Rank();
      auto rank_short = pv_short->Rank();
      auto expanded_pv = MakeShared(rank_long);
      // if different size, expand short pv to long pv
      for (uint32_t i = 0; i < rank_short; ++i) {
        expanded_pv->At(i) = pv_short->At(i);  // replace low dims with short pv
      }
      std::vector<uint32_t> expanded_shape(short_tensor->GetShape());
      for (uint32_t i = 0; i < rank_long; ++i) {
        if (i >= rank_short) expanded_shape.push_back(1);
      }
      short_tensor->GetSpec().SetShape(expanded_shape);

      context_->SetPermuteVector(short_tensor, expanded_pv);  // set new expand pv
    }
    auto required_pv = AlignPermuteVectorForElementWise();
    auto elementwise = context_->infer_graph_->CreateOperation<OpType>();
    for (const auto& i_src : op_->impl()->InputsTensor()) {
      (*elementwise).BindInput(context_->GetMappedTensor(i_src));
    }
    auto out_infer = CreateOutputsTensor(required_pv);
    (*elementwise).BindOutput(out_infer[0]);
    context_->SetPermuteVector(op_->impl()->OutputsTensor()[0], required_pv);
    next_tensors.push_back(op_->impl()->OutputsTensor()[0]);
  }
};

class MultiplyLayoutInfer : public OpLayoutInfer {
 public:
  MultiplyLayoutInfer(
      const std::shared_ptr<vx::Operation> op,
      std::shared_ptr<layout_inference_impl::LayoutInferContext>& context)
      : OpLayoutInfer(op, context) {}

  void OnInputs(
      std::vector<std::shared_ptr<vx::Tensor>>& next_tensors) override {
    auto in_0 = op_->impl()->InputsTensor()[0];
    auto in_1 = op_->impl()->InputsTensor()[1];
    std::shared_ptr<tim::vx::Tensor> short_tensor =
        in_0->GetShape().size() > in_1->GetShape().size() ? in_1 : in_0;
    std::shared_ptr<tim::vx::Tensor> long_tensor =
        in_0->GetShape().size() < in_1->GetShape().size() ? in_1 : in_0;
    if (in_0->GetSpec().attr_ != tim::vx::CONSTANT &&
        in_1->GetSpec().attr_ != tim::vx::CONSTANT &&
        in_0->GetShape().size() != in_1->GetShape().size()) {
      auto pv_long = context_->GetPermuteVector(long_tensor);
      auto pv_short = context_->GetPermuteVector(short_tensor);
      auto rank_long = pv_long->Rank();
      auto rank_short = pv_short->Rank();
      auto expanded_pv = MakeShared(rank_long);
      // if different size, expand short pv to long pv
      for (uint32_t i = 0; i < rank_short; ++i) {
        expanded_pv->At(i) = pv_short->At(i);  // replace low dims with short pv
      }
      std::vector<uint32_t> expanded_shape(short_tensor->GetShape());
      for (uint32_t i = 0; i < rank_long; ++i) {
        if (i >= rank_short) expanded_shape.push_back(1);
      }
      short_tensor->GetSpec().SetShape(expanded_shape);

      context_->SetPermuteVector(short_tensor, expanded_pv);  // set new expand pv
    }
    auto required_pv = AlignPermuteVectorForElementWise();
    auto multiply =
        context_->infer_graph_->CreateOperation<tim::vx::ops::Multiply>(
            op_->impl()->node()->nn_param.multiply.scale);
    for (const auto& i_src : op_->impl()->InputsTensor()) {
      (*multiply).BindInput(context_->GetMappedTensor(i_src));
    }
    auto out_infer = CreateOutputsTensor(required_pv);
    (*multiply).BindOutput(out_infer[0]);
    context_->SetPermuteVector(op_->impl()->OutputsTensor()[0], required_pv);
    next_tensors.push_back(op_->impl()->OutputsTensor()[0]);
  }
};

using AddLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Add>;
using SubLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Sub>;
using DivLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Div>;
using PowLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Pow>;
using MinimumLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Minimum>;
using MaximumLayoutInfer = ElementWiseLayoutInfer<tim::vx::ops::Maximum>;

}  // namespace transform
}  // namespace tim

#endif