// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// 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

#include "common/SystemProperty.h"
#include "exceptions/EasyAssert.h"
#include <yaml-cpp/yaml.h>
#include "common/Types.h"

namespace milvus {
class SystemPropertyImpl : public SystemProperty {
 public:
    [[nodiscard]] bool
    SystemFieldVerify(const FieldName& field_name, FieldId field_id) const override {
        if (!IsSystem(field_name)) {
            return false;
        }
        if (!IsSystem(field_id)) {
            return false;
        }
        auto left_id = name_to_types_.at(field_name);
        auto right_id = id_to_types_.at(field_id);
        return left_id == right_id;
    }

    SystemFieldType
    GetSystemFieldType(FieldName field_name) const override {
        Assert(IsSystem(field_name));
        return name_to_types_.at(field_name);
    }

    SystemFieldType
    GetSystemFieldType(FieldId field_id) const override {
        Assert(IsSystem(field_id));
        return id_to_types_.at(field_id);
    }

    bool
    IsSystem(FieldId field_id) const override {
        return id_to_types_.count(field_id);
    }

    bool
    IsSystem(FieldName field_name) const override {
        return name_to_types_.count(field_name);
    }

    friend SystemPropertyImpl&
    InstanceImpl();

 private:
    std::map<FieldName, SystemFieldType> name_to_types_;
    std::map<FieldId, SystemFieldType> id_to_types_;
};

SystemPropertyImpl&
InstanceImpl() {
    static auto impl = [] {
        SystemPropertyImpl impl;
        using Type = SystemFieldType;

        impl.name_to_types_.emplace(FieldName("RowID"), Type::RowId);
        impl.id_to_types_.emplace(FieldId(0), Type::RowId);

        impl.name_to_types_.emplace(FieldName("Timestamp"), Type::Timestamp);
        impl.id_to_types_.emplace(FieldId(1), Type::Timestamp);

        return impl;
    }();
    return impl;
}

const SystemProperty&
SystemProperty::Instance() {
    return InstanceImpl();
}

};  // namespace milvus
