/*
  Copyright (C) 2010 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Copyright (c) 2010 Leo Franchi <lfranchi@kde.org>

  This library is free software; you can redistribute it and/or modify it
  under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This library is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
  License for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; see the file COPYING.LIB.  If not, write to the
  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301, USA.
*/

#include "messagefactorytest.h"

#include "cryptofunctions.h"

#include <messagecore/utils/stringutil.h>
#include <messagecore/helpers/nodehelper.h>

#include "messagecomposer/composer/composer.h"
#include "messagecomposer/helper/messagefactory.h"
#include "messagecomposer/part/globalpart.h"
#include "messagecomposer/settings/messagecomposersettings.h"

#include "messagecomposer/part/infopart.h"
#include "messagecomposer/part/textpart.h"

#include "testhtmlwriter.h"
#include "testcsshelper.h"
#include <messageviewer/viewer/nodehelper.h>
#include <messagecore/tests/util.h>

#include <messageviewer/viewer/objecttreeparser.h>

#include "qtest_messagecomposer.h"
#include <kmime/kmime_dateformatter.h>

#include <kpimidentities/identitymanager.h>
#include <kpimidentities/identity.h>
#include <qtest_kde.h>
#include <QDateTime>
#include <KCharsets>
#include <QtCore/QDir>
#include "templateparser/globalsettings_base.h"
#include "templateparser/templateparser_export.h"

using namespace MessageComposer;
using namespace MessageComposer;


namespace {
    template <typename String>
    String very_simplistic_diff( const String & a, const String & b ) {
        const QList<String> al = a.split( '\n' );
        const QList<String> bl = b.split( '\n' );
        String result;
        int ai = 0, bi = 0;
        while ( ai < al.size() && bi < bl.size() )
            if ( al[ai] == bl[bi] ) {
                //qDebug( "found   equal line a@%d x b@%d", ai, bi );
                result += "  " + al[ai] + '\n';
                ++ai;
                ++bi;
            } else {
                //qDebug( "found unequal line a@%d x b@%d", ai, bi );
                const int b_in_a = al.indexOf( bl[bi], ai );
                const int a_in_b = bl.indexOf( al[ai], bi );
                //qDebug( "   b_in_a == %d", b_in_a );
                //qDebug( "   a_in_b == %d", a_in_b );
                if ( b_in_a == -1 ) {
                    if ( a_in_b == -1 )
                        // (at least) one line changed:
                        result += "- " + al[ai++] + '\n'
                               +  "+ " + bl[bi++] + '\n';
                    else
                        // some lines added:
                        while ( bi < a_in_b )
                            result += "+ " + bl[bi++] + '\n';
                } else {
                    // some lines removed:
                    while ( ai < b_in_a )
                        result += "- " + al[ai++] + '\n';
                    // some lines added:
                    while ( bi < a_in_b )
                        result += "+ " + bl[bi++] + '\n';
                }
                //qDebug( "result ( a@%d b@%d ):\n%s\n--end", ai, bi, result.constData() );
            }

        for ( int i = ai ; i < al.size() ; ++i  )
            result += "- " + al[i] + '\n';
        for ( int i = bi ; i < bl.size() ; ++i )
            result += "+ " + bl[i] + '\n';
        return result;
    }
}

#define QCOMPARE_OR_DIFF( a, b )                                        \
    if ( a != b )                                                       \
        qDebug( "diff:\n--begin--\n%s\n--end--", very_simplistic_diff( a, b ).constData() ); \
    QVERIFY( a == b )



QTEST_KDEMAIN( MessageFactoryTest, GUI )

void MessageFactoryTest::testCreateReply()
{
  KMime::Message::Ptr msg = createPlainTestMessage();
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;

  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  MessageFactory::MessageReply reply =  factory.createReply();
  QVERIFY( reply.replyAll = true );
  kDebug() << reply.msg->body();

  QDateTime date = msg->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime += QLatin1String( " " ) + KGlobal::locale()->formatTime( date.time(), true );
  QString replyStr = QString::fromLatin1( QByteArray(QByteArray("On ") + datetime.toLatin1() + QByteArray(" you wrote:\n> All happy families are alike; each unhappy family is unhappy in its own way.\n\n")) );
  QVERIFY( reply.msg->subject()->asUnicodeString() == QLatin1String( "Re: Test Email Subject" ) );
  QCOMPARE_OR_DIFF( reply.msg->body(), replyStr.toLatin1() );
  
}

void MessageFactoryTest::testCreateReplyHtml()
{
  KMime::Message::Ptr msg = loadMessageFromFile( QLatin1String("html_utf8_encoded.mbox") );
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;

  kDebug() << "html message:" << msg->encodedContent();

  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  MessageFactory::MessageReply reply =  factory.createReply();
  QVERIFY( reply.replyAll = true );
  kDebug() << "html reply" << reply.msg->encodedContent();

  QDateTime date = msg->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime += QLatin1String( " " ) + KGlobal::locale()->formatTime( date.time(), true );
  QString replyStr = QString::fromLatin1( QByteArray(QByteArray("On ") + datetime.toLatin1() + QByteArray(" you wrote:\n> encoded?\n")) );
  QSKIP("This test has been failing for a long time, please someone fix it", SkipSingle);
  QVERIFY( reply.msg->contentType()->mimeType() == "multipart/alternative" );
  QVERIFY( reply.msg->subject()->asUnicodeString() == QLatin1String( "Re: reply to please" ) );
  QCOMPARE_OR_DIFF( reply.msg->contents().at(0)->body(), replyStr.toLatin1() );

}

void MessageFactoryTest::testCreateReplyUTF16Base64()
{
  KMime::Message::Ptr msg = loadMessageFromFile( QLatin1String("plain_utf16.mbox") );
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;

//   kDebug() << "plain base64 msg message:" << msg->encodedContent();

  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  MessageFactory::MessageReply reply =  factory.createReply();
  QVERIFY( reply.replyAll = true );
//   kDebug() << "html reply" << reply.msg->encodedContent();

  QDateTime date = msg->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime += QLatin1String( " " ) + KGlobal::locale()->formatTime( date.time(), true );
  QString replyStr = QString::fromLatin1( QByteArray(QByteArray("On ") + datetime.toLatin1() + QByteArray(" you wrote:\n> quote me please.\n")) );
  QSKIP("This test has been failing for a long time, please someone fix it", SkipSingle);
  QVERIFY( reply.msg->contentType()->mimeType() == "multipart/alternative" );
  QVERIFY( reply.msg->subject()->asUnicodeString() == QLatin1String( "Re: asking for reply" ) );
  QCOMPARE_OR_DIFF( reply.msg->contents().at(0)->body(), replyStr.toLatin1() );

}

void MessageFactoryTest::testCreateForward()
{
  KMime::Message::Ptr msg = createPlainTestMessage();
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;
  KPIMIdentities::Identity &ident = identMan->modifyIdentityForUoid( identMan->identityForUoidOrDefault( 0 ).uoid() );
  ident.setFullName( QLatin1String( "another" ) );
  ident.setPrimaryEmailAddress( QLatin1String( "another@another.com" ) );
  identMan->commit();

  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  KMime::Message::Ptr fw =  factory.createForward();

  QDateTime date = msg->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime += QLatin1String( ", " ) + KGlobal::locale()->formatTime( date.time(), true );

  QString fwdMsg = QString::fromLatin1(
                      "From: another <another@another.com>\n"
                      "Subject: Fwd: Test Email Subject\n"
                      "Date: %2\n"
                      "User-Agent: %3\n"
                      "X-KMail-Transport: 0\n"
                      "MIME-Version: 1.0\n"
                      "Content-Type: text/plain; charset=\"ISO-8859-1\"\n"
                      "Content-Transfer-Encoding: 8Bit\n"
                      "X-KMail-Link-Message: 0\n"
                      "X-KMail-Link-Type: forward\n"
                      "\n"
                      "\n"
                      "----------  Forwarded Message  ----------\n"
                      "\n"
                      "Subject: Test Email Subject\n"
                      "Date: %1\n"
                      "From: me@me.me\n"
                      "To: you@you.you\n"
                      "CC: cc@cc.cc\n"
                      "\n"
                      "All happy families are alike; each unhappy family is unhappy in its own way.\n"
                      "-----------------------------------------" );
  fwdMsg = fwdMsg.arg( datetime ).arg( fw->date()->asUnicodeString() ).arg( fw->userAgent()->asUnicodeString() );

  
//   kDebug() << "got:" << fw->encodedContent() << "against" << fwdMsg.toLatin1();
  QCOMPARE( fw->subject()->asUnicodeString(), QLatin1String( "Fwd: Test Email Subject" ) );
  QCOMPARE_OR_DIFF( fw->encodedContent(), fwdMsg.toLatin1() );
}

void MessageFactoryTest::testCreateRedirect()
{
  KMime::Message::Ptr msg = createPlainTestMessage();
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;
  KPIMIdentities::Identity &ident = identMan->modifyIdentityForUoid( identMan->identityForUoidOrDefault( 0 ).uoid() );
  ident.setFullName( QLatin1String( "another" ) );
  ident.setPrimaryEmailAddress( QLatin1String( "another@another.com" ) );
  identMan->commit();
  
  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  QString redirectTo = QLatin1String("redir@redir.com");
  KMime::Message::Ptr rdir =  factory.createRedirect( redirectTo );

  QDateTime date = rdir->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime = rdir->date()->asUnicodeString();

//   kDebug() << rdir->encodedContent();
  
  QString msgId = MessageCore::StringUtil::generateMessageId( msg->sender()->asUnicodeString(), QString() );

  QRegExp rx( QString::fromLatin1( "Resent-Message-ID: ([^\n]*)" ) );
  rx.indexIn( QString::fromLatin1( rdir->head() ) );

  QRegExp rxmessageid( QString::fromLatin1( "Message-ID: ([^\n]+)" ) );
  rxmessageid.indexIn( QString::fromLatin1( rdir->head() ) );
  kWarning() << "messageid:" << rxmessageid.cap(1) << "(" << rdir->head() << ")";
  QString baseline = QString::fromLatin1( "From: me@me.me\n"
                                          "Cc: cc@cc.cc\n"
                                          "Bcc: bcc@bcc.bcc\n"
                                          "Subject: Test Email Subject\n"
                                          "Date: %1\n"
                                          "X-KMail-Transport: 0\n"
                                          "Message-ID: %2\n"
                                          "Disposition-Notification-To: me@me.me\n"
                                          "MIME-Version: 1.0\n"
                                          "Content-Transfer-Encoding: 7Bit\n"
                                          "Content-Type: text/plain; charset=\"us-ascii\"\n"
                                          "Resent-Message-ID: %3\n"
                                          "Resent-Date: %4\n"
                                          "Resent-From: %5\n"
                                          "To: you@you.you\n"
                                          "Resent-To: redir@redir.com\n"
                                          "X-KMail-Redirect-From: me@me.me (by way of another <another@another.com>)\n"
                                          "\n"
                                          "All happy families are alike; each unhappy family is unhappy in its own way." );
  baseline = baseline.arg( datetime ).arg( rxmessageid.cap(1) ).arg( rx.cap(1) ).arg( datetime ).arg( QLatin1String( "another <another@another.com>" ) );

//   kDebug() << baseline.toLatin1();
//   kDebug() << "instead:" << rdir->encodedContent();

//   QString fwdStr = QString::fromLatin1( "On " + datetime.toLatin1() + " you wrote:\n> All happy families are alike; each unhappy family is unhappy in its own way.\n" );
  QCOMPARE( rdir->subject()->asUnicodeString(), QLatin1String( "Test Email Subject" ) );
  QCOMPARE_OR_DIFF( rdir->encodedContent(), baseline.toLatin1() );
}

void MessageFactoryTest::testCreateResend()
{
  KMime::Message::Ptr msg = createPlainTestMessage();
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;
  KPIMIdentities::Identity &ident = identMan->modifyIdentityForUoid( identMan->identityForUoidOrDefault( 0 ).uoid() );
  ident.setFullName( QLatin1String( "another" ) );
  ident.setPrimaryEmailAddress( QLatin1String( "another@another.com" ) );
  identMan->commit();

  MessageFactory factory( msg, 0 );
  factory.setIdentityManager( identMan );

  KMime::Message::Ptr rdir =  factory.createResend();

  QDateTime date = rdir->date()->dateTime().dateTime();
  QString datetime = KGlobal::locale()->formatDate( date.date(), KLocale::LongDate );
  datetime = rdir->date()->asUnicodeString();

//   kDebug() << msg->encodedContent();

  QString msgId = MessageCore::StringUtil::generateMessageId( msg->sender()->asUnicodeString(), QString() );

  QRegExp rx( QString::fromLatin1( "Resent-Message-ID: ([^\n]*)" ) );
  rx.indexIn( QString::fromLatin1( rdir->head() ) );

  QRegExp rxmessageid( QString::fromLatin1( "Message-ID: ([^\n]+)" ) );
  rxmessageid.indexIn( QString::fromLatin1( rdir->head() ) );
  
  QString baseline = QString::fromLatin1( "From: me@me.me\n"
                                          "To: %1\n"
                                          "Cc: cc@cc.cc\n"
                                          "Bcc: bcc@bcc.bcc\n"
                                          "Subject: Test Email Subject\n"
                                          "Date: %2\n"
                                          "X-KMail-Transport: 0\n"
                                          "Message-ID: %3\n"
                                          "Disposition-Notification-To: me@me.me\n"
                                          "MIME-Version: 1.0\n"
                                          "Content-Transfer-Encoding: 7Bit\n"
                                          "Content-Type: text/plain; charset=\"us-ascii\"\n"
                                          "\n"
                                          "All happy families are alike; each unhappy family is unhappy in its own way." );
  baseline = baseline.arg( msg->to()->asUnicodeString() ).arg( datetime ).arg( rxmessageid.cap(1) );

  kDebug() << baseline.toLatin1();
  kDebug() << "instead:" << rdir->encodedContent();

//   QString fwdStr = QString::fromLatin1( "On " + datetime.toLatin1() + " you wrote:\n> All happy families are alike; each unhappy family is unhappy in its own way.\n" );
  QCOMPARE( rdir->subject()->asUnicodeString(), QLatin1String( "Test Email Subject" ) );
  QCOMPARE_OR_DIFF( rdir->encodedContent(), baseline.toLatin1() );
}

void MessageFactoryTest::testCreateMDN()
{
  KMime::Message::Ptr msg = createPlainTestMessage();
  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;

  MessageFactory factory( msg, 0 );
  
  factory.setIdentityManager( identMan );

  KMime::Message::Ptr mdn = factory.createMDN( KMime::MDN::AutomaticAction, KMime::MDN::Displayed, KMime::MDN::SentAutomatically );

  QVERIFY( mdn.get() );
  kDebug() << "mdn" << mdn->encodedContent();
/*
  // parse the result and make sure it is valid in various ways
  TestHtmlWriter testWriter;
  TestCSSHelper testCSSHelper;
  TestObjectTreeSource testSource( &testWriter, &testCSSHelper );
  MessageViewer::NodeHelper* nh = new MessageViewer::NodeHelper;
  MessageViewer::ObjectTreeParser otp( &testSource, nh, 0, false, true, 0 );
  MessageViewer::ProcessResult pResult( nh ); */

//   kDebug() << MessageCore::NodeHelper::firstChild( mdn->mainBodyPart() )->encodedContent();
//   kDebug() << MessageCore::NodeHelper::next(  MessageViewer::ObjectTreeParser::findType( mdn.get(), "multipart", "report", true, true ) )->body();


  QString mdnContent = QString::fromLatin1( "The message sent on %1 to %2 with subject \"%3\" has been displayed. "
                                "This is no guarantee that the message has been read or understood." );
  mdnContent = mdnContent.arg( KMime::DateFormatter::formatDate( KMime::DateFormatter::Localized, msg->date()->dateTime().dateTime().toTime_t() ) )
                         .arg( msg->to()->asUnicodeString() ).arg( msg->subject()->asUnicodeString() );

  kDebug() << "comparing with:" << mdnContent;

  QCOMPARE_OR_DIFF( MessageCore::NodeHelper::next(  MessageViewer::ObjectTreeParser::findType( mdn.get(), "multipart", "report", true, true ) )->body(),
                    mdnContent.toLatin1() );
}

KMime::Message::Ptr MessageFactoryTest::createPlainTestMessage()
{
  Composer *composer = new Composer;
  composer->globalPart()->setFallbackCharsetEnabled( true );
  composer->infoPart()->setFrom( QString::fromLatin1( "me@me.me" ) );
  composer->infoPart()->setTo( QStringList( QString::fromLatin1( "you@you.you" ) ) );
  composer->infoPart()->setCc( QStringList( QString::fromLatin1( "cc@cc.cc" ) ) );
  composer->infoPart()->setBcc( QStringList( QString::fromLatin1( "bcc@bcc.bcc" ) ) );
  composer->textPart()->setWrappedPlainText( QString::fromLatin1( "All happy families are alike; each unhappy family is unhappy in its own way." ) );
  composer->infoPart()->setSubject( QLatin1String( "Test Email Subject" ) );
  composer->globalPart()->setMDNRequested( true );
  composer->exec();
  
  KMime::Message::Ptr message = KMime::Message::Ptr( composer->resultMessages().first() );
  delete composer;

  MessageComposerSettings::self()->setPreferredCharsets( QStringList() << QLatin1String( "us-ascii" ) << QLatin1String( "iso-8859-1" ) << QLatin1String( "utf-8" ) );

  return message;
}

KMime::Message::Ptr MessageFactoryTest::loadMessageFromFile(QString filename)
{
  QFile file( QLatin1String( QByteArray(MAIL_DATA_DIR "/" + filename.toLatin1()) ) );
  const bool opened = file.open( QIODevice::ReadOnly );
  Q_ASSERT( opened );
  Q_UNUSED( opened );
  const QByteArray data = KMime::CRLFtoLF( file.readAll() );
  Q_ASSERT( !data.isEmpty() );
  KMime::Message::Ptr msg( new KMime::Message );
  msg->setContent( data );
  msg->parse();
  return msg;
}

void MessageFactoryTest::test_multipartAlternative_data()
{
  QTest::addColumn<QString>( "mailFileName" );
  QTest::addColumn<int>( "contentAt" );
  QTest::addColumn<QString>( "selection" );
  QTest::addColumn<QString>( "expected" );

  QDir dir( QLatin1String( MAIL_DATA_DIR ) );
  foreach ( const QString &file, dir.entryList( QStringList( QLatin1String("plain_message.mbox") ), QDir::Files | QDir::Readable | QDir::NoSymLinks  ) ) {
     QTest::newRow( file.toLatin1() ) << QString( dir.path() + QLatin1Char( '/' ) + file ) << 0 << "" <<
     "> This *is* the *message* text *from* Sudhendu Kumar<dontspamme@yoohoo.com>\n"
     "> \n"
     "> --\n"
     "> Thanks & Regards\n"
     "> Sudhendu Kumar";
     QTest::newRow( file.toLatin1() ) << QString( dir.path() + QLatin1Char( '/' ) + file ) << 1 << "" << "<html><head></head><body>"
     "<blockquote>This <i>is</i> the <b>message</b> text <u>from</u> Sudhendu Kumar&lt;dontspamme@yoohoo.com&gt;<br>"
     "<br>-- <br>Thanks &amp; Regards<br>Sudhendu Kumar<br>\n</blockquote><br/></body></html>";
   }
}

void MessageFactoryTest::test_multipartAlternative()
{
  QFETCH( QString, mailFileName );
  QFETCH( int, contentAt );
  QFETCH( QString, selection );
  QFETCH( QString, expected );

  QFile mailFile( mailFileName );
  QVERIFY( mailFile.open( QIODevice::ReadOnly ) );
  const QByteArray mailData = KMime::CRLFtoLF( mailFile.readAll() );
  QVERIFY( !mailData.isEmpty() );
  KMime::Message::Ptr origMsg( new KMime::Message );
  origMsg->setContent( mailData );
  origMsg->parse();

  KPIMIdentities::IdentityManager* identMan = new KPIMIdentities::IdentityManager;

  MessageFactory factory( origMsg, 0 );
  factory.setIdentityManager( identMan );
  factory.setSelection( selection );
  factory.setQuote( true );
  factory.setReplyStrategy( ReplyAll );
  TemplateParser::GlobalSettings::self()->setTemplateReplyAll( QLatin1String( "%QUOTE" ) );

  QString str;
  str = TemplateParser::GlobalSettings::self()->templateReplyAll();
  factory.setTemplate( str );

  MessageFactory::MessageReply reply =  factory.createReply();
  QVERIFY( reply.replyAll = true );
  QSKIP("This tests has been failing for a long time, please someone fix it", SkipSingle);
  QVERIFY( reply.msg->contentType()->mimeType() == "multipart/alternative" );
  QVERIFY( reply.msg->subject()->asUnicodeString() == QLatin1String( "Re: Plain Message Test" ) );
  QCOMPARE( reply.msg->contents().at( contentAt )->encodedBody().data(), expected.toLatin1().data() );
}