/**
 * @file services/logging/log_consumer.h
 * @brief Dedicated log drain worker for the pipeline logging channel.
 *
 * LogConsumer runs on its own thread, draining LogEntry items from a
 * BoundedChannel<LogEntry> and forwarding them to spdlog. Exits cleanly
 * when the channel is closed.
 */

#ifndef BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_CONSUMER_H_
#define BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_CONSUMER_H_

#include <spdlog/spdlog.h>

#include <string>

#include "concurrency/bounded_channel.h"
#include "services/logging/log_entry.h"

class LogConsumer {
 public:
  explicit LogConsumer(BoundedChannel<LogEntry>& channel);

  LogConsumer(const LogConsumer&) = delete;
  LogConsumer& operator=(const LogConsumer&) = delete;
  LogConsumer(LogConsumer&&) = delete;
  LogConsumer& operator=(LogConsumer&&) = delete;

  /**
   * @brief Drains the channel until it is closed.
   *
   * Intended to be run on a dedicated std::thread. Exits when:
   *   - The channel is closed and the queue is fully drained.
   */
  void Run();

 private:
  BoundedChannel<LogEntry>& channel_;

  static spdlog::level::level_enum ToSpdlogLevel(LogLevel level);
  static std::string ToString(PipelinePhase phase);
};

#endif  // BIERGARTEN_PIPELINE_INCLUDES_SERVICES_LOGGING_LOG_CONSUMER_H_