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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (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.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001-2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Seth Spitzer <sspitzer@netscape.com>
 *  Dan Mosedale <dmose@netscape.com>
 *  David Bienvenu <bienvenu@mozilla.org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef _nsMsgDBView_H_
#define _nsMsgDBView_H_

#include "nsIMsgDBView.h"
#include "nsIMsgWindow.h"
#include "nsIMessenger.h"
#include "nsIMsgDatabase.h"
#include "nsIMsgHdr.h"
#include "nsMsgLineBuffer.h" // for nsByteArray
#include "nsMsgKeyArray.h"
#include "nsUint8Array.h"
#include "nsIDBChangeListener.h"
#include "nsITreeView.h"
#include "nsITreeBoxObject.h"
#include "nsITreeSelection.h"
#include "nsVoidArray.h"
#include "nsIMsgFolder.h"
#include "nsIDateTimeFormat.h"
#include "nsIMsgHeaderParser.h"
#include "nsIDOMElement.h"
#include "nsIAtom.h"
#include "nsIImapIncomingServer.h"
#include "nsIPref.h"
#include "nsIWeakReference.h"
#include "nsIObserver.h"
#include "nsIMsgFilterPlugin.h"
#include "nsIStringBundle.h"

#define MESSENGER_STRING_URL       "chrome://messenger/locale/messenger.properties"

enum eFieldType {
    kCollationKey,
    kU32
};

// reserve the top 8 bits in the msg flags for the view-only flags.
#define MSG_VIEW_FLAGS 0xEE000000
#define MSG_VIEW_FLAG_HASCHILDREN 0x40000000
#define MSG_VIEW_FLAG_DUMMY 0x20000000
#define MSG_VIEW_FLAG_ISTHREAD 0x8000000

/* There currently only 5 labels defined */
#define PREF_LABELS_MAX 5
#define PREF_LABELS_DESCRIPTION  "mailnews.labels.description."
#define PREF_LABELS_COLOR  "mailnews.labels.color."

#define LABEL_COLOR_STRING "lc-"
#define LABEL_COLOR_WHITE_STRING "#FFFFFF"

// I think this will be an abstract implementation class.
// The classes that implement the tree support will probably
// inherit from this class.
class nsMsgDBView : public nsIMsgDBView, public nsIDBChangeListener,
                    public nsITreeView, public nsIObserver,
                    public nsIJunkMailClassificationListener
{
public:
  nsMsgDBView();
  virtual ~nsMsgDBView();

  NS_DECL_ISUPPORTS
  NS_DECL_NSIMSGDBVIEW
  NS_DECL_NSIDBCHANGELISTENER
  NS_DECL_NSITREEVIEW
  NS_DECL_NSIOBSERVER
  NS_DECL_NSIJUNKMAILCLASSIFICATIONLISTENER

  nsMsgViewIndex GetInsertIndexHelper(nsIMsgDBHdr *msgHdr, nsMsgKeyArray *keys,
                                        nsMsgViewSortOrderValue sortOrder);
protected:
  static nsrefcnt gInstanceCount;
  // atoms used for styling the view. we're going to have a lot of
  // these so i'm going to make them static.
  static nsIAtom* kUnreadMsgAtom;
  static nsIAtom* kNewMsgAtom;
  static nsIAtom* kReadMsgAtom;
  static nsIAtom* kRepliedMsgAtom;
  static nsIAtom* kForwardedMsgAtom;
  static nsIAtom* kOfflineMsgAtom;
  static nsIAtom* kFlaggedMsgAtom;
  static nsIAtom* kImapDeletedMsgAtom;
  static nsIAtom* kAttachMsgAtom;
  static nsIAtom* kHasUnreadAtom;
  static nsIAtom* kWatchThreadAtom;
  static nsIAtom* kIgnoreThreadAtom;
  static nsIAtom* kHasImageAtom;

#ifdef SUPPORT_PRIORITY_COLORS
  static nsIAtom* kHighestPriorityAtom;
  static nsIAtom* kHighPriorityAtom;
  static nsIAtom* kLowestPriorityAtom;
  static nsIAtom* kLowPriorityAtom;
#endif

  static PRUnichar* kHighestPriorityString;
  static PRUnichar* kHighPriorityString;
  static PRUnichar* kLowestPriorityString;
  static PRUnichar* kLowPriorityString;
  static PRUnichar* kNormalPriorityString;

  static nsIAtom* kLabelColorWhiteAtom;
  static nsIAtom* kLabelColorBlackAtom;

  static nsIAtom* kJunkMsgAtom;
  static nsIAtom* kNotJunkMsgAtom;

  static nsIAtom* kDummyMsgAtom;

  static PRUnichar* kReadString;
  static PRUnichar* kRepliedString;
  static PRUnichar* kForwardedString;
  static PRUnichar* kNewString;

  nsCOMPtr<nsITreeBoxObject> mTree;
  nsCOMPtr<nsITreeSelection> mTreeSelection;
  PRUint32 mNumSelectedRows; // we cache this to determine when to push command status notifications.
  PRPackedBool   mSuppressMsgDisplay; // set when the message pane is collapsed
  PRPackedBool   mSuppressCommandUpdating;
  PRPackedBool   mRemovingRow; // set when we're telling the outline a row is being removed. used to suppress msg loading.
                        // during delete/move operations.
  PRPackedBool  mCommandsNeedDisablingBecauseOfSelection;
  PRPackedBool  mSuppressChangeNotification;
  virtual const char * GetViewName(void) {return "MsgDBView"; }
  nsresult FetchAuthor(nsIMsgHdr * aHdr, PRUnichar ** aAuthorString);
  nsresult FetchRecipients(nsIMsgHdr * aHdr, PRUnichar ** aRecipientsString);
  nsresult FetchSubject(nsIMsgHdr * aMsgHdr, PRUint32 aFlags, PRUnichar ** aValue);
  nsresult FetchDate(nsIMsgHdr * aHdr, PRUnichar ** aDateString);
  nsresult FetchStatus(PRUint32 aFlags, PRUnichar ** aStatusString);
  nsresult FetchSize(nsIMsgHdr * aHdr, PRUnichar ** aSizeString);
  nsresult FetchPriority(nsIMsgHdr *aHdr, PRUnichar ** aPriorityString);
  nsresult FetchLabel(nsIMsgHdr *aHdr, PRUnichar ** aLabelString);
  nsresult FetchAccount(nsIMsgHdr * aHdr, PRUnichar ** aAccount);
  nsresult CycleThreadedColumn(nsIDOMElement * aElement);

  // Save and Restore Selection are a pair of routines you should
  // use when performing an operation which is going to change the view
  // and you want to remember the selection. (i.e. for sorting). 
  // Call SaveAndClearSelection and we'll give you an array of msg keys for
  // the current selection. We also freeze and clear the selection. 
  // When you are done changing the view, 
  // call RestoreSelection passing in the same array
  // and we'll restore the selection AND unfreeze selection in the UI.
  nsresult SaveAndClearSelection(nsMsgKeyArray * aMsgKeyArray);
  nsresult RestoreSelection(nsMsgKeyArray * aMsgKeyArray);

  // this is not safe to use when you have a selection
  // RowCountChanged() will call AdjustSelection() 
  // it should be called after SaveAndClearSelection() and before
  // RestoreSelection()
  nsresult AdjustRowCount(PRInt32 rowCountBeforeSort, PRInt32 rowCountAfterSort);

  nsresult GetSelectedIndices(nsUInt32Array *selection);
  nsresult GenerateURIForMsgKey(nsMsgKey aMsgKey, nsIMsgFolder *folder, char ** aURI);
// routines used in building up view
  virtual PRBool WantsThisThread(nsIMsgThread * thread);
  virtual nsresult	AddHdr(nsIMsgDBHdr *msgHdr);
  PRBool GetShowingIgnored() {return (m_viewFlags & nsMsgViewFlagsType::kShowIgnored) != 0;}
  virtual nsresult OnNewHeader(nsIMsgDBHdr *aNewHdr, nsMsgKey parentKey, PRBool ensureListed);
  virtual nsMsgViewIndex GetInsertIndex(nsIMsgDBHdr *msgHdr);
  nsMsgViewIndex GetIndexForThread(nsIMsgDBHdr *hdr);
  virtual nsresult GetThreadContainingIndex(nsMsgViewIndex index, nsIMsgThread **thread);
  virtual nsresult GetMsgHdrForViewIndex(nsMsgViewIndex index, nsIMsgDBHdr **msgHdr);

  nsresult ToggleExpansion(nsMsgViewIndex index, PRUint32 *numChanged);
  nsresult ExpandByIndex(nsMsgViewIndex index, PRUint32 *pNumExpanded);
  nsresult CollapseByIndex(nsMsgViewIndex index, PRUint32 *pNumCollapsed);
  nsresult ExpandAll();
  nsresult CollapseAll();
  nsresult ExpandAndSelectThread();

  // helper routines for thread expanding and collapsing.
  nsresult		GetThreadCount(nsMsgKey messageKey, PRUint32 *pThreadCount);
  nsMsgViewIndex GetIndexOfFirstDisplayedKeyInThread(nsIMsgThread *threadHdr);
  nsresult GetFirstMessageHdrToDisplayInThread(nsIMsgThread *threadHdr, nsIMsgDBHdr **result);
  virtual nsMsgViewIndex ThreadIndexOfMsg(nsMsgKey msgKey, 
				  nsMsgViewIndex msgIndex = nsMsgViewIndex_None,
				  PRInt32 *pThreadCount = nsnull,
				  PRUint32 *pFlags = nsnull);
  virtual nsresult GetThreadContainingMsgHdr(nsIMsgDBHdr *msgHdr, nsIMsgThread **pThread);
  nsMsgKey GetKeyOfFirstMsgInThread(nsMsgKey key);
  PRInt32 CountExpandedThread(nsMsgViewIndex index);
  nsresult ExpansionDelta(nsMsgViewIndex index, PRInt32 *expansionDelta);
  nsresult ReverseSort();
  nsresult ReverseThreads();
  nsresult SaveSortInfo(nsMsgViewSortTypeValue sortType, nsMsgViewSortOrderValue sortOrder);
  nsresult PersistFolderInfo(nsIDBFolderInfo **dbFolderInfo);

  nsMsgKey		GetAt(nsMsgViewIndex index) ;
  nsMsgViewIndex	FindViewIndex(nsMsgKey  key) 
					  {return FindKey(key, PR_FALSE);}
  nsMsgViewIndex        FindHdr(nsIMsgDBHdr *msgHdr);
  virtual nsMsgViewIndex	FindKey(nsMsgKey key, PRBool expand);
  virtual nsresult GetDBForViewIndex(nsMsgViewIndex index, nsIMsgDatabase **db);
  virtual nsresult GetFolders(nsISupportsArray **folders);
  virtual nsresult GetFolderFromMsgURI(const char *aMsgURI, nsIMsgFolder **aFolder);

  nsresult ListIdsInThread(nsIMsgThread *threadHdr, nsMsgViewIndex viewIndex, PRUint32 *pNumListed);
  nsresult ListUnreadIdsInThread(nsIMsgThread *threadHdr, nsMsgViewIndex startOfThreadViewIndex, PRUint32 *pNumListed);
  nsMsgViewIndex FindParentInThread(nsMsgKey parentKey, nsMsgViewIndex startOfThreadViewIndex);
  nsresult ListIdsInThreadOrder(nsIMsgThread *threadHdr, nsMsgKey parentKey, PRInt32 level, nsMsgViewIndex *viewIndex, PRUint32 *pNumListed);
  PRInt32  GetSize(void) {return(m_keys.GetSize());}

  // notification api's
  void	EnableChangeUpdates();
  void	DisableChangeUpdates();
  void	NoteChange(nsMsgViewIndex firstlineChanged, PRInt32 numChanged, 
                    nsMsgViewNotificationCodeValue changeType);
  void	NoteStartChange(nsMsgViewIndex firstlineChanged, PRInt32 numChanged, 
                        nsMsgViewNotificationCodeValue changeType);
  void	NoteEndChange(nsMsgViewIndex firstlineChanged, PRInt32 numChanged, 
                        nsMsgViewNotificationCodeValue changeType);

  // for commands
  nsresult ApplyCommandToIndices(nsMsgViewCommandTypeValue command, nsMsgViewIndex* indices,
					PRInt32 numIndices);
  nsresult ApplyCommandToIndicesWithFolder(nsMsgViewCommandTypeValue command, nsMsgViewIndex* indices, 
                    PRInt32 numIndices, nsIMsgFolder *destFolder);
  virtual nsresult CopyMessages(nsIMsgWindow *window, nsMsgViewIndex *indices, PRInt32 numIndices, PRBool isMove, nsIMsgFolder *destFolder);
  virtual nsresult DeleteMessages(nsIMsgWindow *window, nsMsgViewIndex *indices, PRInt32 numIndices, PRBool deleteStorage);
  nsresult SetStringPropertyByIndex(nsMsgViewIndex index, const char *aProperty, const char *aValue);
  nsresult SetJunkScoreByIndex(nsIJunkMailPlugin *aJunkPlugin, 
                               nsMsgViewIndex aIndex,
                               nsMsgJunkStatus aNewClassification,
                               PRBool aIsLastInBatch);
  nsresult ToggleReadByIndex(nsMsgViewIndex index);
  nsresult SetReadByIndex(nsMsgViewIndex index, PRBool read);
  nsresult SetThreadOfMsgReadByIndex(nsMsgViewIndex index, nsMsgKeyArray &keysMarkedRead, PRBool read);
  nsresult SetFlaggedByIndex(nsMsgViewIndex index, PRBool mark);
  nsresult SetLabelByIndex(nsMsgViewIndex index, nsMsgLabelValue label);
  nsresult OrExtraFlag(nsMsgViewIndex index, PRUint32 orflag);
  nsresult AndExtraFlag(nsMsgViewIndex index, PRUint32 andflag);
  nsresult SetExtraFlag(nsMsgViewIndex index, PRUint32 extraflag);
	virtual nsresult RemoveByIndex(nsMsgViewIndex index);
  virtual void		OnExtraFlagChanged(nsMsgViewIndex /*index*/, PRUint32 /*extraFlag*/) {}
	virtual void		OnHeaderAddedOrDeleted() {}	
  nsresult ToggleThreadIgnored(nsIMsgThread *thread, nsMsgViewIndex threadIndex);
  nsresult ToggleThreadWatched(nsIMsgThread *thread, nsMsgViewIndex index);
  nsresult ToggleWatched( nsMsgViewIndex* indices,	PRInt32 numIndices);
  nsresult SetThreadWatched(nsIMsgThread *thread, nsMsgViewIndex index, PRBool watched);
  nsresult SetThreadIgnored(nsIMsgThread *thread, nsMsgViewIndex threadIndex, PRBool ignored);
  nsresult DownloadForOffline(nsIMsgWindow *window, nsMsgViewIndex *indices, PRInt32 numIndices);
  nsresult DownloadFlaggedForOffline(nsIMsgWindow *window);
  nsMsgViewIndex	GetThreadFromMsgIndex(nsMsgViewIndex index, nsIMsgThread **threadHdr);

  // for sorting
  nsresult GetFieldTypeAndLenForSort(nsMsgViewSortTypeValue sortType, PRUint16 *pMaxLen, eFieldType *pFieldType);
  nsresult GetCollationKey(nsIMsgHdr *msgHdr, nsMsgViewSortTypeValue sortType, PRUint8 **result, PRUint32 *len);
  nsresult GetLongField(nsIMsgDBHdr *msgHdr, nsMsgViewSortTypeValue sortType, PRUint32 *result);
  nsresult GetStatusSortValue(nsIMsgHdr *msgHdr, PRUint32 *result);
  nsresult GetLocationCollationKey(nsIMsgHdr *msgHdr, PRUint8 **result, PRUint32 *len);

  // for view navigation
  nsresult NavigateFromPos(nsMsgNavigationTypeValue motion, nsMsgViewIndex startIndex, nsMsgKey *pResultKey, 
              nsMsgViewIndex *pResultIndex, nsMsgViewIndex *pThreadIndex, PRBool wrap);
  nsresult FindNextFlagged(nsMsgViewIndex startIndex, nsMsgViewIndex *pResultIndex);
  nsresult FindFirstNew(nsMsgViewIndex *pResultIndex);
  nsresult FindNextUnread(nsMsgKey startId, nsMsgKey *pResultKey, nsMsgKey *resultThreadId);
  nsresult FindPrevUnread(nsMsgKey startKey, nsMsgKey *pResultKey, nsMsgKey *resultThreadId);
  nsresult FindFirstFlagged(nsMsgViewIndex *pResultIndex);
  nsresult FindPrevFlagged(nsMsgViewIndex startIndex, nsMsgViewIndex *pResultIndex);
  nsresult MarkThreadOfMsgRead(nsMsgKey msgId, nsMsgViewIndex msgIndex, nsMsgKeyArray &idsMarkedRead, PRBool bRead);
  nsresult MarkThreadRead(nsIMsgThread *threadHdr, nsMsgViewIndex threadIndex, nsMsgKeyArray &idsMarkedRead, PRBool bRead);
  PRBool IsValidIndex(nsMsgViewIndex index);
  nsresult ToggleIgnored(nsMsgViewIndex * indices, PRInt32 numIndices, PRBool *resultToggleState);
  PRBool OfflineMsgSelected(nsMsgViewIndex * indices, PRInt32 numIndices);
  PRBool NonDummyMsgSelected(nsMsgViewIndex * indices, PRInt32 numIndices);
  PRUnichar * GetString(const PRUnichar *aStringName);
  nsresult AddLabelPrefObservers();
  nsresult RemoveLabelPrefObservers();
  nsresult GetPrefLocalizedString(const char *aPrefName, nsString& aResult);
  nsresult GetLabelPrefStringAndAtom(const char *aPrefName, nsString& aColor, nsIAtom** aColorAtom);
  nsresult AppendLabelProperties(nsMsgLabelValue label, nsISupportsArray *aProperties);
  nsresult AppendSelectedTextColorProperties(nsMsgLabelValue label, nsISupportsArray *aProperties);
  nsresult InitLabelPrefs(void);
  nsresult CopyDBView(nsMsgDBView *aNewMsgDBView, nsIMessenger *aMessengerInstance, nsIMsgWindow *aMsgWindow, nsIMsgDBViewCommandUpdater *aCmdUpdater);
  void InitializeAtomsAndLiterals();
  virtual PRInt32 FindLevelInThread(nsIMsgDBHdr *msgHdr, nsMsgViewIndex startOfThread, nsMsgViewIndex viewIndex);
  nsresult GetImapDeleteModel(nsIMsgFolder *folder);
  nsresult UpdateDisplayMessage(nsMsgViewIndex viewPosition);
  nsresult LoadMessageByViewIndexHelper(nsMsgViewIndex aViewIndex, PRBool forceAllParts);
  nsresult ReloadMessageHelper(PRBool forceAllParts);

  PRBool AdjustReadFlag(nsIMsgDBHdr *msgHdr, PRUint32 *msgFlags);
  void FreeAll(nsVoidArray *ptrs);
  void ClearHdrCache();
  nsMsgKeyArray m_keys;
  nsUInt32Array m_flags;
  nsUint8Array   m_levels;
  nsMsgImapDeleteModel mDeleteModel;

  // cache the most recently asked for header and corresponding msgKey.
  nsCOMPtr <nsIMsgDBHdr>  m_cachedHdr;
  nsMsgKey                m_cachedMsgKey;

  // we need to store the message key for the message we are currenty displaying to ensure we
  // don't try to redisplay the same message just because the selection changed (i.e. after a sort)
  nsMsgKey                m_currentlyDisplayedMsgKey;
  nsCString               m_currentlyDisplayedMsgUri;
  nsMsgViewIndex          m_currentlyDisplayedViewIndex;
  // if we're deleting messages, we want to hold off loading messages on selection changed until the delete is done
  // and we want to batch notifications.
  PRPackedBool m_deletingRows;
  // for certain special folders 
  // and decendents of those folders
  // (like the "Sent" folder, "Sent/Old Sent")
  // the Sender column really shows recipients.
  PRPackedBool mIsNews;             // we have special icons for news
  PRPackedBool mShowSizeInLines;    // for news we show lines instead of size when true
  PRPackedBool m_sortValid;
  PRUint8      m_saveRestoreSelectionDepth;

  nsCOMPtr <nsIMsgDatabase> m_db;
  nsCOMPtr <nsIMsgFolder> m_folder;
  nsCOMPtr <nsIMsgFolder> m_viewFolder; // for virtual folders, the VF db.
  nsCOMPtr <nsIAtom> mRedirectorTypeAtom;
  nsCOMPtr <nsIAtom> mMessageTypeAtom; // news, rss, mail, etc. 
  nsMsgViewSortTypeValue  m_sortType;
  nsMsgViewSortOrderValue m_sortOrder;
  nsMsgViewFlagsTypeValue m_viewFlags;

  // I18N date formater service which we'll want to cache locally.
  nsCOMPtr<nsIDateTimeFormat> mDateFormater;
  nsCOMPtr<nsIMsgHeaderParser> mHeaderParser;
  // i'm not sure if we are going to permamently need a nsIMessenger instance or if we'll be able
  // to phase it out eventually....for now we need it though.
  nsCOMPtr<nsIMessenger> mMessengerInstance;
  nsCOMPtr<nsIMsgWindow> mMsgWindow;
  nsCOMPtr<nsIMsgDBViewCommandUpdater> mCommandUpdater; // we push command update notifications to the UI from this.
  nsCOMPtr<nsIStringBundle> mMessengerStringBundle;  

  // used for the preference labels
  nsString mLabelPrefDescriptions[PREF_LABELS_MAX];
  nsString mLabelPrefColors[PREF_LABELS_MAX];
  // used to cache the atoms created for each color to be displayed
  static nsIAtom* mLabelPrefColorAtoms[PREF_LABELS_MAX];

  // used to know to finish out the junk mail classification batch when the 
  // last classification callback happens
  nsCString mLastJunkUriInBatch;
  PRUint8 mOutstandingJunkBatches;
  nsUInt32Array mIndicesToNoteChange;

protected:
  static nsresult   InitDisplayFormats();

private:
  static nsDateFormatSelector  m_dateFormatDefault;
  static nsDateFormatSelector  m_dateFormatThisWeek;
  static nsDateFormatSelector  m_dateFormatToday;
  PRBool ServerSupportsFilterAfterTheFact();

  nsMsgKeyArray	mJunkKeys;
  nsCOMPtr <nsIMsgFolder> mJunkTargetFolder;
  nsresult PerformActionOnJunkMsgs();
  nsresult SaveJunkMsgForAction(nsIMsgIncomingServer *aServer, const char *aMsgURI, nsMsgJunkStatus aClassification);

};

#endif