// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
// vim: ts=8 sw=2 smarttab
/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software 
 * Foundation.  See file COPYING.
 * 
 */

#ifndef CEPH_LOGENTRY_H
#define CEPH_LOGENTRY_H

#include "include/types.h"
#include "include/utime.h"
#include "include/encoding.h"
#include "msg/msg_types.h" // for entity_inst_t

namespace ceph {
  class Formatter;
}

typedef enum {
  CLOG_DEBUG = 0,
  CLOG_INFO = 1,
  CLOG_SEC = 2,
  CLOG_WARN = 3,
  CLOG_ERROR = 4,
} clog_type;

/*
 * Given a clog log_type, return the equivalent syslog priority
 */
int clog_type_to_syslog_prio(clog_type t);


struct LogEntryKey {
  entity_inst_t who;
  utime_t stamp;
  uint64_t seq;

  LogEntryKey() {}
  LogEntryKey(entity_inst_t w, utime_t t, uint64_t s) : who(w), stamp(t), seq(s) {}

  void encode(bufferlist& bl) const;
  void decode(bufferlist::iterator& bl);
  void dump(Formatter *f) const;
  static void generate_test_instances(list<LogEntryKey*>& o);
};
WRITE_CLASS_ENCODER(LogEntryKey)

static inline bool operator==(const LogEntryKey& l, const LogEntryKey& r) {
  return l.who == r.who && l.stamp == r.stamp && l.seq == r.seq;
}

struct LogEntry {
  entity_inst_t who;
  utime_t stamp;
  uint64_t seq;
  clog_type type;
  string msg;

  LogEntryKey key() const { return LogEntryKey(who, stamp, seq); }

  void encode(bufferlist& bl) const;
  void decode(bufferlist::iterator& bl);
  void dump(Formatter *f) const;
  static void generate_test_instances(list<LogEntry*>& o);
};
WRITE_CLASS_ENCODER(LogEntry)

struct LogSummary {
  version_t version;
  list<LogEntry> tail;

  LogSummary() : version(0) {}

  void add(const LogEntry& e) {
    tail.push_back(e);
    while (tail.size() > 50)
      tail.pop_front();
  }
  bool contains(LogEntryKey k) const {
    for (list<LogEntry>::const_iterator p = tail.begin();
	 p != tail.end();
	 p++)
      if (p->key() == k) return true;
    return false;
  }

  void encode(bufferlist& bl) const;
  void decode(bufferlist::iterator& bl);
  void dump(Formatter *f) const;
  static void generate_test_instances(list<LogSummary*>& o);
};
WRITE_CLASS_ENCODER(LogSummary)

inline ostream& operator<<(ostream& out, clog_type t)
{
  switch (t) {
  case CLOG_DEBUG:
    return out << "[DBG]";
  case CLOG_INFO:
    return out << "[INF]";
  case CLOG_WARN:
    return out << "[WRN]";
  case CLOG_ERROR:
    return out << "[ERR]";
  case CLOG_SEC:
    return out << "[SEC]";
  default:
    return out << "[???]";
  }
}

inline ostream& operator<<(ostream& out, const LogEntry& e)
{
  return out << e.stamp << " " << e.who << " " << e.seq << " : " << e.type << " " << e.msg;
}

#endif