/*
 *     Copyright 2021-Present Couchbase, 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 "internal/exceptions_internal.hxx"

#include <atomic>
#include <list>
#include <mutex>

namespace couchbase::core::transactions
{

class error_list
{
  private:
    std::list<transaction_operation_failed> list_;
    std::mutex mutex_;
    std::atomic<std::size_t> size_{ 0 };

  public:
    bool empty()
    {
        return size_.load() == 0;
    }
    void push_back(const transaction_operation_failed& ex)
    {
        std::lock_guard<std::mutex> lock(mutex_);
        list_.push_back(ex);
        size_ = list_.size();
    }
    void do_throw(std::optional<external_exception> cause = {})
    {
        assert(size_.load() > 0);
        // merge the errors, throw a composite
        std::lock_guard<std::mutex> lock(mutex_);
        transaction_operation_failed::merge_errors(list_, cause);
    }
};
} // namespace couchbase::core::transactions