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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _nsMsgThread_H
#define _nsMsgThread_H

#include "nsIMsgThread.h"
#include "nsString.h"
#include "MailNewsTypes.h"
#include "mdb.h"

class nsIMdbTable;
class nsIMsgDBHdr;
class nsMsgDatabase;

class nsMsgThread : public nsIMsgThread {
 public:
  nsMsgThread();
  nsMsgThread(nsMsgDatabase* db, nsIMdbTable* table);

  friend class nsMsgThreadEnumerator;
  friend class nsMsgDatabase;

  NS_DECL_ISUPPORTS
  NS_DECL_NSIMSGTHREAD

  RefPtr<nsMsgDatabase> m_mdbDB;

 protected:
  virtual ~nsMsgThread();

  void Init();
  void Clear();
  virtual nsresult InitCachedValues();
  nsresult ChangeChildCount(int32_t delta);
  nsresult ChangeUnreadChildCount(int32_t delta);
  nsresult RemoveChild(nsMsgKey msgKey);
  nsresult SetThreadRootKey(nsMsgKey threadRootKey);
  nsresult GetChildHdrForKey(nsMsgKey desiredKey, nsIMsgDBHdr** result,
                             int32_t* resultIndex);
  nsresult RerootThread(nsIMsgDBHdr* newParentOfOldRoot, nsIMsgDBHdr* oldRoot,
                        nsIDBChangeAnnouncer* announcer);
  nsresult ReparentChildrenOf(nsMsgKey oldParent, nsMsgKey newParent,
                              nsIDBChangeAnnouncer* announcer);

  nsresult ReparentNonReferenceChildrenOf(nsIMsgDBHdr* topLevelHdr,
                                          nsMsgKey newParentKey,
                                          nsIDBChangeAnnouncer* announcer);
  nsresult ReparentMsgsWithInvalidParent(uint32_t numChildren,
                                         nsMsgKey threadParentKey);

  nsMsgKey m_threadKey;
  uint32_t m_numChildren;
  uint32_t m_numUnreadChildren;
  uint32_t m_flags;
  nsCOMPtr<nsIMdbTable> m_mdbTable;
  nsCOMPtr<nsIMdbRow> m_metaRow;
  bool m_cachedValuesInitialized;
  nsMsgKey m_threadRootKey;
  uint32_t m_newestMsgDate;
};

#endif