// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.

#pragma once
#include "Types.h"
#include <string>
#include <type_traits>
#include "Array.h"

namespace milvus {

class VectorTrait {};

class FloatVector : public VectorTrait {
 public:
    using embedded_type = float;
    static constexpr auto metric_type = DataType::VECTOR_FLOAT;
};

class BinaryVector : public VectorTrait {
 public:
    using embedded_type = uint8_t;
    static constexpr auto metric_type = DataType::VECTOR_BINARY;
};

class Float16Vector : public VectorTrait {
 public:
    using embedded_type = float16;
    static constexpr auto metric_type = DataType::VECTOR_FLOAT16;
};

class BFloat16Vector : public VectorTrait {
 public:
    using embedded_type = bfloat16;
    static constexpr auto metric_type = DataType::VECTOR_BFLOAT16;
};

class SparseFloatVector : public VectorTrait {
 public:
    using embedded_type = float;
    static constexpr auto metric_type = DataType::VECTOR_SPARSE_FLOAT;
};

template <typename T>
constexpr bool IsVector = std::is_base_of_v<VectorTrait, T>;

template <typename T>
constexpr bool IsScalar =
    std::is_fundamental_v<T> || std::is_same_v<T, std::string> ||
    std::is_same_v<T, Json> || std::is_same_v<T, std::string_view> ||
    std::is_same_v<T, Array> || std::is_same_v<T, ArrayView> ||
    std::is_same_v<T, proto::plan::Array>;

template <typename T>
constexpr bool IsSparse = std::is_same_v<T, SparseFloatVector> ||
                          std::is_same_v<T, knowhere::sparse::SparseRow<float>>;

template <typename T>
constexpr bool IsVariableType =
    std::is_same_v<T, std::string> || std::is_same_v<T, std::string_view> ||
    std::is_same_v<T, Array> || std::is_same_v<T, ArrayView> ||
    std::is_same_v<T, proto::plan::Array> || std::is_same_v<T, Json> ||
    IsSparse<T>;

template <typename T>
constexpr bool IsVariableTypeSupportInChunk =
    std::is_same_v<T, std::string> || std::is_same_v<T, Array> ||
    std::is_same_v<T, Json>;

template <typename T>
using ChunkViewType = std::conditional_t<
    std::is_same_v<T, std::string>,
    std::string_view,
    std::conditional_t<std::is_same_v<T, Array>, ArrayView, T>>;

struct FundamentalTag {};
struct StringTag {};

template <class T>
struct TagDispatchTrait {
    using Tag = FundamentalTag;
};

template <>
struct TagDispatchTrait<std::string> {
    using Tag = StringTag;
};

}  // namespace milvus