/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 MPL, 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 MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "msgCore.h"
#include "nsImapUtils.h"
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsIServiceManager.h"
#include "prsystem.h"
#include "prprf.h"
#include "nsEscape.h"
#include "nsNetCID.h"

// stuff for temporary root folder hack
#include "nsIMsgAccountManager.h"
#include "nsIMsgIncomingServer.h"
#include "nsIImapIncomingServer.h"
#include "nsMsgBaseCID.h"
#include "nsImapCore.h"
#include "nsMsgUtils.h"
#include "nsImapFlagAndUidState.h"
#include "nsISupportsObsolete.h"
#include "nsIMAPNamespace.h"
#include "nsIImapFlagAndUidState.h"

nsresult
nsImapURI2Path(const char* rootURI, const char* uriStr, nsILocalFile **pathResult)
{
  nsresult rv;
  
  nsCOMPtr<nsIURL> url;
 
  url = do_CreateInstance(NS_STANDARDURL_CONTRACTID, &rv);
  if (NS_FAILED(rv)) return rv;
  
  nsCAutoString uri(uriStr);
  if (uri.Find(rootURI) != 0)     // if doesn't start with rootURI
    return NS_ERROR_FAILURE;
  
  if ((PL_strcmp(rootURI, kImapRootURI) != 0) &&
      (PL_strcmp(rootURI, kImapMessageRootURI) != 0)) 
  {
    *pathResult = nsnull;
    rv = NS_ERROR_FAILURE; 
  }
  
  // Set our url to the string given
  rv = url->SetSpec(nsDependentCString(uriStr));
  if (NS_FAILED(rv)) return rv;

  // Set the folder to the url path
  nsCAutoString folder;
  rv = url->GetPath(folder);
  // can't have leading '/' in path
  if (folder.CharAt(0) == '/')
    folder.Cut(0, 1);

  const char *curPos = uriStr + PL_strlen(rootURI);
  nsCAutoString newPath("");
  if (curPos) 
  {
    // advance past hostname
    while (*curPos && (*curPos)!='/') 
      curPos++;

    char *unescaped = NS_strdup(curPos);  
    if (unescaped) 
    {
      nsUnescape(unescaped);
      NS_MsgCreatePathStringFromFolderURI(unescaped, newPath);
      NS_Free(unescaped);
    }
    else
      NS_MsgCreatePathStringFromFolderURI(curPos, newPath);
  }
  // Now find the server from the URL
  nsCOMPtr<nsIMsgIncomingServer> server;
  nsCOMPtr<nsIMsgAccountManager> accountManager = 
    do_GetService(NS_MSGACCOUNTMANAGER_CONTRACTID, &rv);
  if(NS_FAILED(rv)) return rv;
  
  rv = accountManager->FindServerByURI(url, PR_FALSE,
    getter_AddRefs(server));

  if (NS_FAILED(rv)) return rv;
  
  nsCOMPtr<nsILocalFile> localPath;
  if (server) 
  {
    rv = server->GetLocalPath(getter_AddRefs(localPath));
    NS_ENSURE_SUCCESS(rv, rv);
    
    // This forces the creation of the parent server directory
    // so that we don't get imapservername.sbd instead
    // when the host directory has been deleted. See bug 210683
    localPath->Create(nsIFile::DIRECTORY_TYPE, 0700);
  }
  if (NS_FAILED(rv)) 
  {
    pathResult = nsnull;
    return rv;
  }
  localPath->AppendRelativeNativePath(newPath);
  NS_IF_ADDREF(*pathResult = localPath);
  return NS_OK;
}

nsresult
nsImapURI2FullName(const char* rootURI, const char* hostName, const char* uriStr,
                   char **name)
{
    nsAutoString uri;
    CopyASCIItoUTF16(uriStr, uri);
    nsAutoString fullName;
    if (uri.Find(rootURI) != 0)
      return NS_ERROR_FAILURE;
    uri.Right(fullName, uri.Length() - strlen(rootURI));
    uri = fullName;
    PRInt32 hostStart = uri.Find(hostName);
    if (hostStart <= 0) 
      return NS_ERROR_FAILURE;
    uri.Right(fullName, uri.Length() - hostStart);
    uri = fullName;
    PRInt32 hostEnd = uri.FindChar('/');
    if (hostEnd <= 0) 
      return NS_ERROR_FAILURE;
    uri.Right(fullName, uri.Length() - hostEnd - 1);
    if (fullName.IsEmpty())
      return NS_ERROR_FAILURE;
    *name = ToNewCString(fullName);
    return NS_OK;
}

/* parses ImapMessageURI */
nsresult nsParseImapMessageURI(const char* uri, nsCString& folderURI, PRUint32 *key, char **part)
{
  if(!key)
    return NS_ERROR_NULL_POINTER;
  
  nsCAutoString uriStr(uri);
  PRInt32 keySeparator = uriStr.RFindChar('#');
  if(keySeparator != -1)
  {
    PRInt32 keyEndSeparator = uriStr.FindCharInSet("/?&", 
      keySeparator); 
    nsAutoString folderPath;
    uriStr.Left(folderURI, keySeparator);
    folderURI.Cut(4, 8);	// cut out the _message part of imap-message:
    nsCAutoString keyStr;
    if (keyEndSeparator != -1)
      uriStr.Mid(keyStr, keySeparator+1, 
      keyEndSeparator-(keySeparator+1));
    else
      uriStr.Right(keyStr, uriStr.Length() - (keySeparator + 1));
    PRInt32 errorCode;
    *key = keyStr.ToInteger(&errorCode);
    
    if (part && keyEndSeparator != -1)
    {
      PRInt32 partPos = uriStr.Find("part=", PR_FALSE, keyEndSeparator);
      if (partPos != -1)
      {
        nsCString partSubStr;
        uriStr.Right(partSubStr, uriStr.Length() - keyEndSeparator);
        *part = ToNewCString(partSubStr);
        
      }
    }
  }
  return NS_OK;
  
}

nsresult nsBuildImapMessageURI(const char *baseURI, PRUint32 key, nsCString& uri)
{
  uri.Append(baseURI);
  uri.Append('#');
  uri.AppendInt(key);
  return NS_OK;
}

nsresult nsCreateImapBaseMessageURI(const nsACString& baseURI, nsCString &baseMessageURI)
{
  nsCAutoString tailURI(baseURI);
  // chop off imap:/
  if (tailURI.Find(kImapRootURI) == 0)
    tailURI.Cut(0, PL_strlen(kImapRootURI));
  baseMessageURI = kImapMessageRootURI;
  baseMessageURI += tailURI;
  return NS_OK;
}

// nsImapMailboxSpec definition
NS_IMPL_THREADSAFE_ISUPPORTS1(nsImapMailboxSpec, nsIMailboxSpec)

nsImapMailboxSpec::nsImapMailboxSpec()
{
  mFolder_UIDVALIDITY = 0;
  mHighestModSeq = 0;
  mNumOfMessages = 0;
  mNumOfUnseenMessages = 0;
  mNumOfRecentMessages = 0;
  
  mBoxFlags = 0;
  mSupportedUserFlags = 0;
  
  mHierarchySeparator = '\0';
  
  mFolderSelected = PR_FALSE;
  mDiscoveredFromLsub = PR_FALSE;
  
  mOnlineVerified = PR_FALSE;
  mNamespaceForFolder = nsnull;
}

nsImapMailboxSpec::~nsImapMailboxSpec()
{
}

NS_IMPL_GETSET(nsImapMailboxSpec, Folder_UIDVALIDITY, PRInt32, mFolder_UIDVALIDITY)
NS_IMPL_GETSET(nsImapMailboxSpec, HighestModSeq, PRUint64, mHighestModSeq)
NS_IMPL_GETSET(nsImapMailboxSpec, NumMessages, PRInt32, mNumOfMessages)
NS_IMPL_GETSET(nsImapMailboxSpec, NumUnseenMessages, PRInt32, mNumOfUnseenMessages)
NS_IMPL_GETSET(nsImapMailboxSpec, NumRecentMessages, PRInt32, mNumOfRecentMessages)
NS_IMPL_GETSET(nsImapMailboxSpec, HierarchySeparator, char, mHierarchySeparator)
NS_IMPL_GETSET(nsImapMailboxSpec, FolderSelected, PRBool, mFolderSelected)
NS_IMPL_GETSET(nsImapMailboxSpec, DiscoveredFromLsub, PRBool, mDiscoveredFromLsub)
NS_IMPL_GETSET(nsImapMailboxSpec, OnlineVerified, PRBool, mOnlineVerified)
NS_IMPL_GETSET(nsImapMailboxSpec, SupportedUserFlags, PRUint32, mSupportedUserFlags)
NS_IMPL_GETSET(nsImapMailboxSpec, Box_flags, PRUint32, mBoxFlags)
NS_IMPL_GETSET(nsImapMailboxSpec, NamespaceForFolder, nsIMAPNamespace *, mNamespaceForFolder)

NS_IMETHODIMP nsImapMailboxSpec::GetAllocatedPathName(nsACString &aAllocatedPathName)
{
  aAllocatedPathName = mAllocatedPathName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::SetAllocatedPathName(const nsACString &aAllocatedPathName)
{
  mAllocatedPathName = aAllocatedPathName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::GetUnicharPathName(nsAString &aUnicharPathName)
{
  aUnicharPathName = aUnicharPathName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::SetUnicharPathName(const nsAString &aUnicharPathName)
{
  mUnicharPathName = aUnicharPathName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::GetHostName(nsACString &aHostName)
{
  aHostName = mHostName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::SetHostName(const nsACString &aHostName)
{
  mHostName = aHostName;
  return NS_OK;
} 

NS_IMETHODIMP nsImapMailboxSpec::GetFlagState(nsIImapFlagAndUidState ** aFlagState)
{
  NS_ENSURE_ARG_POINTER(aFlagState);
  NS_IF_ADDREF(*aFlagState = mFlagState);
  return NS_OK;
}

NS_IMETHODIMP nsImapMailboxSpec::SetFlagState(nsIImapFlagAndUidState * aFlagState)
{
  NS_ENSURE_ARG_POINTER(aFlagState);
  mFlagState = aFlagState;
  return NS_OK;
}

nsImapMailboxSpec& nsImapMailboxSpec::operator= (const nsImapMailboxSpec& aCopy) 
{
  mFolder_UIDVALIDITY = aCopy.mFolder_UIDVALIDITY;
  mHighestModSeq = aCopy.mHighestModSeq;
  mNumOfMessages = aCopy.mNumOfMessages;
  mNumOfUnseenMessages = aCopy.mNumOfUnseenMessages;
  mNumOfRecentMessages = aCopy.mNumOfRecentMessages;
	
  mBoxFlags = aCopy.mBoxFlags;
  mSupportedUserFlags = aCopy.mSupportedUserFlags;
  
  mAllocatedPathName.Assign(aCopy.mAllocatedPathName);
  mUnicharPathName.Assign(aCopy.mUnicharPathName);
  mHierarchySeparator = mHierarchySeparator;
  mHostName.Assign(aCopy.mHostName);
	
  mFlagState = aCopy.mFlagState;
  mNamespaceForFolder = aCopy.mNamespaceForFolder;
	
  mFolderSelected = aCopy.mFolderSelected;
  mDiscoveredFromLsub = aCopy.mDiscoveredFromLsub;

  mOnlineVerified = aCopy.mOnlineVerified;
  
  return *this;
}

// use the flagState to determine if the gaps in the msgUids correspond to gaps in the mailbox,
// in which case we can still use ranges. If flagState is null, we won't do this.
void AllocateImapUidString(PRUint32 *msgUids, PRUint32 &msgCount, 
                           nsImapFlagAndUidState *flagState, nsCString &returnString)
{
  PRUint32 startSequence = (msgCount > 0) ? msgUids[0] : 0xFFFFFFFF;
  PRUint32 curSequenceEnd = startSequence;
  PRUint32 total = msgCount;
  PRInt32  curFlagStateIndex = -1;

  // a partial fetch flag state doesn't help us, so don't use it.
  if (flagState && flagState->GetPartialUIDFetch())
    flagState = nsnull;

  for (PRUint32 keyIndex=0; keyIndex < total; keyIndex++)
  {
    PRUint32 curKey = msgUids[keyIndex];
    PRUint32 nextKey = (keyIndex + 1 < total) ? msgUids[keyIndex + 1] : 0xFFFFFFFF;
    PRBool lastKey = (nextKey == 0xFFFFFFFF);

    if (lastKey)
      curSequenceEnd = curKey;

    if (!lastKey)
    {
      if (nextKey == curSequenceEnd + 1)
      {
        curSequenceEnd = nextKey;
        curFlagStateIndex++;
        continue;
      }
      if (flagState)
      {
        if (curFlagStateIndex == -1)
        {
          PRBool foundIt;
          flagState->GetMessageFlagsFromUID(curSequenceEnd, &foundIt, &curFlagStateIndex);
          NS_ASSERTION(foundIt, "flag state missing key");
        }
        curFlagStateIndex++;
        PRUint32 nextUidInFlagState;
        nsresult rv = flagState->GetUidOfMessage(curFlagStateIndex, &nextUidInFlagState);
        if (NS_SUCCEEDED(rv) && nextUidInFlagState == nextKey)
        {
          curSequenceEnd = nextKey;
          continue;
        }
      }
    }
    if (curSequenceEnd > startSequence)
    {
      returnString.AppendInt(startSequence);
      returnString += ':';
      returnString.AppendInt(curSequenceEnd);
      startSequence = nextKey;
      curSequenceEnd = startSequence;
      curFlagStateIndex = -1;
    }
    else
    {
      startSequence = nextKey;
      curSequenceEnd = startSequence;
      returnString.AppendInt(msgUids[keyIndex]);
      curFlagStateIndex = -1;
    }
    // check if we've generated too long a string - if there's no flag state,
    // it means we just need to go ahead and generate a too long string
    // because the calling code won't handle breaking up the strings.
    if (flagState && returnString.Length() > 950) 
    {
      msgCount = keyIndex;
      break;
    }
    // If we are not the last item then we need to add the comma 
    // but it's important we do it here, after the length check 
    if (!lastKey) 
      returnString += ','; 
  }
}

void ParseUidString(const char *uidString, nsTArray<nsMsgKey> &keys)
{
  // This is in the form <id>,<id>, or <id1>:<id2>
  char curChar = *uidString;
  PRBool isRange = PR_FALSE;
  int32 curToken;
  int32 saveStartToken=0;

  for (const char *curCharPtr = uidString; curChar && *curCharPtr;)
  {
    const char *currentKeyToken = curCharPtr;
    curChar = *curCharPtr;
    while (curChar != ':' && curChar != ',' && curChar != '\0')
      curChar = *curCharPtr++;

    // we don't need to null terminate currentKeyToken because atoi 
    // stops at non-numeric chars.
    curToken = atoi(currentKeyToken); 
    if (isRange)
    {
      while (saveStartToken < curToken)
        keys.AppendElement(saveStartToken++);
    }
    keys.AppendElement(curToken);
    isRange = (curChar == ':');
    if (isRange)
      saveStartToken = curToken + 1;
  }
}

void AppendUid(nsCString &msgIds, PRUint32 uid)
{
  char buf[20];
  PR_snprintf(buf, sizeof(buf), "%u", uid);
  msgIds.Append(buf);
}

PRUint64 ParseUint64Str(const char *str)
{
#ifdef XP_WIN
  {
    char *endPtr;
    return _strtoui64(str, &endPtr, 10);
  }
#else
  return strtoull(str, nsnull, 10);
#endif
}