// Licensed to the Apache Software Foundation (ASF) 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 <sys/types.h>

#include "arrow/buffer.h"
#include "arrow/flight/client.h"
#include "arrow/flight/server.h"
#include "common/status.h"
#include "core/data_type/data_type.h"
#include "format/arrow/arrow_row_batch.h"

namespace doris {

enum class PythonUDFLoadType : uint8_t { INLINE = 0, MODULE = 1, UNKNOWN = 2 };

enum class PythonClientType : uint8_t { UDF = 0, UDAF = 1, UDTF = 2, UNKNOWN = 3 };

struct PythonUDFMeta {
    int64_t id;
    std::string name;
    std::string symbol;
    std::string location;
    std::string checksum;
    std::string runtime_version;
    std::string inline_code;
    bool always_nullable;
    DataTypes input_types;
    DataTypePtr return_type;
    PythonUDFLoadType type;
    PythonClientType client_type;

    static Status convert_types_to_schema(const DataTypes& types, const std::string& timezone,
                                          std::shared_ptr<arrow::Schema>* schema);

    static Status serialize_arrow_schema(const std::shared_ptr<arrow::Schema>& schema,
                                         std::shared_ptr<arrow::Buffer>* out);

    Status serialize_to_json(std::string* json_str) const;

    std::string to_string() const;

    Status check() const;

    bool operator==(const PythonUDFMeta& other) const { return id == other.id; }
};

} // namespace doris

namespace std {
template <>
struct hash<doris::PythonUDFMeta> {
    size_t operator()(const doris::PythonUDFMeta& meta) const {
        return std::hash<int64_t>()(meta.id);
    }
};
} // namespace std