// Copyright 2023 PingCAP, Inc.
//
// 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.

#pragma once

#include <Common/RedactHelpers.h>
#include <IO/Buffer/WriteBufferFromString.h>
#include <IO/WriteHelpers.h>
#include <Storages/Page/PageDefinesBase.h>
#include <Storages/Page/PageStorageMemorySummary.h>

namespace DB
{
class UniversalPageId final
{
public:
    UniversalPageId() { PS::PageStorageMemorySummary::uni_page_id_bytes.fetch_add(id.size()); }
    UniversalPageId(const UniversalPageId & other);
    UniversalPageId(UniversalPageId && other);
    UniversalPageId(String id_) // NOLINT(google-explicit-constructor)
        : id(std::move(id_))
    {
        PS::PageStorageMemorySummary::uni_page_id_bytes.fetch_add(id.size());
    }
    UniversalPageId(const char * id_) // NOLINT(google-explicit-constructor)
        : id(id_)
    {
        PS::PageStorageMemorySummary::uni_page_id_bytes.fetch_add(id.size());
    }
    UniversalPageId(const char * id_, size_t sz_)
        : id(id_, sz_)
    {
        PS::PageStorageMemorySummary::uni_page_id_bytes.fetch_add(id.size());
    }

    ~UniversalPageId();

    UniversalPageId & operator=(UniversalPageId && other) noexcept;
    UniversalPageId & operator=(const UniversalPageId & other) noexcept;
    UniversalPageId & operator=(String && id_) noexcept;
    bool operator==(const UniversalPageId & rhs) const noexcept { return id == rhs.id; }
    bool operator!=(const UniversalPageId & rhs) const noexcept { return id != rhs.id; }
    bool operator>=(const UniversalPageId & rhs) const noexcept { return id >= rhs.id; }
    size_t rfind(const String & str, size_t pos) const noexcept { return id.rfind(str, pos); }

    const char * data() const { return id.data(); }
    size_t size() const { return id.size(); }
    bool empty() const { return id.empty(); }
    UniversalPageId substr(size_t pos, size_t npos) const { return id.substr(pos, npos); }
    bool operator<(const UniversalPageId & rhs) const { return id < rhs.id; }
    bool hasPrefix(const String & str) const { return startsWith(id, str); }
    bool hasPrefix(const char * str) const { return startsWith(id, str); }

    String toStr() const { return id; }
    const String & asStr() const { return id; }

    friend bool operator==(const String & lhs, const UniversalPageId & rhs);

private:
    String id;
};

using UniversalPageIds = std::vector<UniversalPageId>;

inline bool operator==(const String & lhs, const UniversalPageId & rhs)
{
    return lhs == rhs.id;
}

namespace details
{
struct UniversalPageIdFormatHelper
{
public:
    static String format(const DB::UniversalPageId & value);
};
} // namespace details

} // namespace DB

template <>
struct fmt::formatter<DB::UniversalPageId>
{
    static constexpr auto parse(format_parse_context & ctx) { return ctx.begin(); }

    template <typename FormatContext>
    auto format(const DB::UniversalPageId & value, FormatContext & ctx) const
    {
        return fmt::format_to(ctx.out(), "{}", DB::details::UniversalPageIdFormatHelper::format(value));
    }
};

namespace std
{

template <>
struct hash<DB::UniversalPageId>
{
    std::size_t operator()(const DB::UniversalPageId & k) const { return hash<std::string>()(k.asStr()); }
};

} // namespace std