/* -*- 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) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mark Banner <bugzilla@standard8.demon.co.uk>
 *
 * 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 "nsTextAddress.h"
#include "nsIAddrDatabase.h"
#include "nsNativeCharsetUtils.h"
#include "nsIFile.h"
#include "nsIInputStream.h"
#include "nsILineInputStream.h"
#include "nsNetUtil.h"

#include "TextDebugLog.h"
#include "plstr.h"
#include "msgCore.h"

#define kWhitespace    " \t\b\r\n"

// If we get a line longer than 32K it's just toooooo bad!
#define kTextAddressBufferSz    (64 * 1024)

nsTextAddress::nsTextAddress()
{
    m_database = nsnull;
    m_fieldMap = nsnull;
    m_LFCount = 0;
    m_CRCount = 0;
}

nsTextAddress::~nsTextAddress()
{
    NS_IF_RELEASE(m_database);
    NS_IF_RELEASE(m_fieldMap);
}

nsresult nsTextAddress::ImportAddresses(bool *pAbort, const PRUnichar *pName, nsIFile *pSrc, nsIAddrDatabase *pDb, nsIImportFieldMap *fieldMap, nsString& errors, PRUint32 *pProgress)
{
  // Open the source file for reading, read each line and process it!
  NS_IF_RELEASE(m_database);
  NS_IF_RELEASE(m_fieldMap);
  m_database = pDb;
  m_fieldMap = fieldMap;
  NS_ADDREF(m_fieldMap);
  NS_ADDREF(m_database);

  nsCOMPtr<nsIInputStream> inputStream;
  nsresult rv = NS_NewLocalFileInputStream(getter_AddRefs(inputStream), pSrc);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error opening address file for reading\n");
    return rv;
  }

  // Here we use this to work out the size of the file, so we can update
  // an integer as we go through the file which will update a progress
  // bar if required by the caller.
  PRUint32 bytesLeft = 0;
  rv = inputStream->Available(&bytesLeft);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error checking address file for size\n");
    inputStream->Close();
    return rv;
  }

  PRUint32 totalBytes = bytesLeft;
  bool skipRecord = false;

  rv = m_fieldMap->GetSkipFirstRecord(&skipRecord);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0("*** Error checking to see if we should skip the first record\n");
    return rv;
  }

  nsCOMPtr<nsILineInputStream> lineStream(do_QueryInterface(inputStream, &rv));
  NS_ENSURE_SUCCESS(rv, rv);

  bool more = true;
  nsCString line;

  // Skip the first record if the user has requested it.
  if (skipRecord)
    rv = ReadRecord(lineStream, line, m_delim, &more);

  while (!(*pAbort) && more && NS_SUCCEEDED( rv)) {
    // Read the line in
    rv = ReadRecord(lineStream, line, m_delim, &more);
    if (NS_SUCCEEDED(rv)) {
      // Now proces it to add it to the database
      rv = ProcessLine(line.get(), line.Length(), errors);

      if (NS_FAILED(rv)) {
        IMPORT_LOG0( "*** Error processing text record.\n");
      }
    }
    if (NS_SUCCEEDED(rv) && pProgress) {
      // This won't be totally accurate, but its the best we can do
      // considering that lineStream won't give us how many bytes
      // are actually left.
      bytesLeft -= line.Length();
      *pProgress = totalBytes - bytesLeft;
    }
  }

  inputStream->Close();

  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error reading the address book - probably incorrect ending\n");
    return NS_ERROR_FAILURE;
  }

  return pDb->Commit(nsAddrDBCommitType::kLargeCommit);
}

nsresult nsTextAddress::ReadRecord(nsILineInputStream *aLineStream, nsCString &aLine, char delim, bool *aMore)
{
  bool more = true;
  PRUint32 numQuotes = 0;
  nsresult rv;
  nsCString line;

  // ensure aLine is empty
  aLine.Truncate();

  do {
    if (!more) {
      // No more, so we must have an incorrect file.
      rv = NS_ERROR_FAILURE;
    }
    else {
      // Read the line and append it
      rv = aLineStream->ReadLine(line, &more);
      if (NS_SUCCEEDED(rv)) {
        if (!aLine.IsEmpty())
          aLine.AppendLiteral(MSG_LINEBREAK);
        aLine.Append(line);

#ifdef MOZILLA_INTERNAL_API
        numQuotes += line.CountChar('"');
#else
        const char *begin, *end;
        line.BeginReading(&begin, &end);
        for (const char *current = begin; current < end; ++current) {
          if (*current == '"')
            ++numQuotes;
        }
#endif
      }
    }
    // Continue whilst everything is ok, and we have an odd number of quotes.
  } while (NS_SUCCEEDED(rv) && (numQuotes % 2 != 0));

  *aMore = more;
  return rv;
}

nsresult nsTextAddress::ReadRecordNumber(nsIFile *aSrc, nsCString &aLine, char delim, PRInt32 rNum)
{
  nsCOMPtr<nsIInputStream> inputStream;
  nsresult rv = NS_NewLocalFileInputStream(getter_AddRefs(inputStream), aSrc);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error opening address file for reading\n");
    return rv;
  }

  PRInt32 rIndex = 0;
  PRUint32 bytesLeft = 0;

  rv = inputStream->Available(&bytesLeft);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error checking address file for eof\n");
    inputStream->Close();
    return rv;
  }

  nsCOMPtr<nsILineInputStream> lineStream(do_QueryInterface(inputStream, &rv));
  NS_ENSURE_SUCCESS(rv, rv);

  bool more = true;

  while (more && (rIndex <= rNum)) {
    rv = ReadRecord(lineStream, aLine, delim, &more);
    if (NS_FAILED(rv)) {
      inputStream->Close();
      return rv;
    }
    if (rIndex == rNum) {
      inputStream->Close();
      return NS_OK;
    }

    rIndex++;
  }

  return NS_ERROR_FAILURE;
}

PRInt32 nsTextAddress::CountFields( const char *pLine, PRInt32 maxLen, char delim)
{
    const char *pChar = pLine;
    PRInt32        len = 0;
    PRInt32        count = 0;
    char        tab = 9;

    if (delim == tab)
        tab = 0;

    while (len < maxLen) {
        while (((*pChar == ' ') || (*pChar == tab)) && (len < maxLen)) {
            pChar++;
            len++;
        }
        if ((len < maxLen) && (*pChar == '"')) {
            pChar++;
            len++;
            while ((len < maxLen) && (*pChar != '"')) {
                len++;
                pChar++;
                if (((len + 1) < maxLen) && (*pChar == '"') && (*(pChar + 1) == '"')) {
                    len += 2;
                    pChar += 2;
                }
            }
            if (len < maxLen) {
                pChar++;
                len++;
            }
        }
        while ((len < maxLen) && (*pChar != delim)) {
            len++;
            pChar++;
        }

        count++;
        pChar++;
        len++;
    }

    return( count);
}

bool nsTextAddress::GetField( const char *pLine, PRInt32 maxLen, PRInt32 index, nsCString& field, char delim)
{
    bool result = false;
    const char *pChar = pLine;
    PRInt32        len = 0;
    char        tab = 9;

    field.Truncate();

    if (delim == tab)
        tab = 0;

    while (index && (len < maxLen)) {
        while (((*pChar == ' ') || (*pChar == tab)) && (len < maxLen)) {
            pChar++;
            len++;
        }
        if (len >= maxLen)
            break;
        if (*pChar == '"') {
            len = -1;
            do {
                len++;
                pChar++;
                if (((len + 1) < maxLen) && (*pChar == '"') && (*(pChar + 1) == '"')) {
                    len += 2;
                    pChar += 2;
                }
            } while ((len < maxLen) && (*pChar != '"'));
            if (len < maxLen) {
                pChar++;
                len++;
            }
        }
        if (len >= maxLen)
            break;

        while ((len < maxLen) && (*pChar != delim)) {
            len++;
            pChar++;
        }

        if (len >= maxLen)
            break;

        index--;
        pChar++;
        len++;
    }

    if (len >= maxLen) {
        return( result);
    }

    result = PR_TRUE;

    while ((len < maxLen) && ((*pChar == ' ') || (*pChar == tab))) {
        len++;
        pChar++;
    }

    const char *pStart = pChar;
    PRInt32        fLen = 0;
    bool          quoted = false;
    if (*pChar == '"') {
        pStart++;
        fLen = -1;
        do {
            pChar++;
            len++;
            fLen++;
            if (((len + 1) < maxLen) && (*pChar == '"') && (*(pChar + 1) == '"')) {
                quoted = PR_TRUE;
                len += 2;
                pChar += 2;
                fLen += 2;
            }
        } while ((len < maxLen) && (*pChar != '"'));
    }
    else {
        while ((len < maxLen) && (*pChar != delim)) {
            pChar++;
            len++;
            fLen++;
        }
    }

    if (!fLen) {
        return( result);
    }

    field.Append( pStart, fLen);
    field.Trim( kWhitespace);

    if (quoted) {
      PRInt32 offset = field.Find(NS_LITERAL_CSTRING("\"\""));
      while (offset != -1) {
        field.Cut(offset, 1);
        offset = field.Find(NS_LITERAL_CSTRING("\"\""), offset + 1);
      }
    }

    return( result);
}

nsresult nsTextAddress::DetermineDelim(nsIFile *aSrc)
{
  nsCOMPtr<nsIInputStream> inputStream;
  nsresult rv = NS_NewLocalFileInputStream(getter_AddRefs(inputStream), aSrc);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error opening address file for reading\n");
    return rv;
  }

  char *pLine = new char[kTextAddressBufferSz];
  if (!pLine)
    return NS_ERROR_OUT_OF_MEMORY;

  PRUint32 bytesLeft = 0;
  rv = inputStream->Available(&bytesLeft);
  if (NS_FAILED(rv)) {
    IMPORT_LOG0( "*** Error checking address file for eof\n");
    inputStream->Close();
    delete [] pLine;
    return rv;
  }

  PRUint32 left;
  PRInt32 lineLen = 0;
  PRInt32 lineCount = 0;
  PRInt32 tabCount = 0;
  PRInt32 commaCount = 0;
  PRInt32 tabLines = 0;
  PRInt32 commaLines = 0;

  while (bytesLeft && NS_SUCCEEDED(rv) && (lineCount < 100)) {
    left = 0;
    rv = inputStream->Read(pLine, kTextAddressBufferSz, &left);
    if (left)
      pLine[kTextAddressBufferSz - 1] = 0;

    if (NS_SUCCEEDED(rv)) {
      lineLen = strlen(pLine);
      tabCount = CountFields(pLine, lineLen, 9);
      commaCount = CountFields(pLine, lineLen, ',');
      if (tabCount > commaCount)
        tabLines++;
      else if (commaCount)
        commaLines++;
      rv = inputStream->Available(&bytesLeft);
    }
    lineCount++;
  }

  rv = inputStream->Close();

  delete [] pLine;

  if (tabLines > commaLines)
    m_delim = 9;
  else
    m_delim = ',';

  return rv;
}

/*
    This is where the real work happens!
    Go through the field map and set the data in a new database row
*/
nsresult nsTextAddress::ProcessLine( const char *pLine, PRInt32 len, nsString& errors)
{
    if (!m_fieldMap) {
        IMPORT_LOG0( "*** Error, text import needs a field map\n");
        return( NS_ERROR_FAILURE);
    }

    nsresult rv;

    // Wait until we get our first non-empty field, then create a new row,
    // fill in the data, then add the row to the database.


    nsIMdbRow *    newRow = nsnull;
    nsString    uVal;
    nsCString    fieldVal;
    PRInt32        fieldNum;
    PRInt32        numFields = 0;
    bool          active;
    rv = m_fieldMap->GetMapSize( &numFields);
    for (PRInt32 i = 0; (i < numFields) && NS_SUCCEEDED( rv); i++) {
        active = PR_FALSE;
        rv = m_fieldMap->GetFieldMap( i, &fieldNum);
        if (NS_SUCCEEDED( rv))
            rv = m_fieldMap->GetFieldActive( i, &active);
        if (NS_SUCCEEDED( rv) && active) {
            if (GetField( pLine, len, i, fieldVal, m_delim)) {
                if (!fieldVal.IsEmpty()) {
                    if (!newRow) {
                        rv = m_database->GetNewRow( &newRow);
                        if (NS_FAILED( rv)) {
                            IMPORT_LOG0( "*** Error getting new address database row\n");
                        }
                    }
                    if (newRow) {
                        NS_CopyNativeToUnicode( fieldVal, uVal);
                        rv = m_fieldMap->SetFieldValue( m_database, newRow, fieldNum, uVal.get());
                    }
                }
            }
            else
                break;

        }
        else {
            if (active) {
                IMPORT_LOG1( "*** Error getting field map for index %ld\n", (long) i);
            }
        }

    }

    if (NS_SUCCEEDED( rv)) {
        if (newRow) {
            rv = m_database->AddCardRowToDB( newRow);
            // Release newRow????
        }
    }
    else {
        // Release newRow??
    }

    return( rv);
}

