/*
  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.
*/

#ifndef COMPOSER_VIEW_BASE_H
#define COMPOSER_VIEW_BASE_H

#include "messagecomposer_export.h"
#include "sender/messagesender.h"
#include "messagecomposer/recipient/recipient.h"

#include <akonadi/collection.h>
#include <KDE/KMime/Message>

#include <QObject>
#include <KUrl>
#include <kleo/enum.h>

#include <QTimer>
class KJob;
#include <QWidget>

namespace SendLater {
class SendLaterInfo;
}


namespace Akonadi {
class CollectionComboBox;
}

namespace MailTransport {
class TransportComboBox;
class MessageQueueJob;
}

namespace KPIMIdentities {
class IdentityCombo;
class Identity;
class IdentityManager;
}

namespace Kleo {
class KeyResolver;
}

namespace MessageComposer {
class RecipientsEditor;
class KMeditor;
class InfoPart;
class GlobalPart;
class Composer;
class AttachmentControllerBase;
class AttachmentModel;
class SignatureController;
/**
 *
 */
class MESSAGECOMPOSER_EXPORT ComposerViewBase : public QObject
{
    Q_OBJECT
public:
    explicit ComposerViewBase ( QObject* parent = 0, QWidget *parentGui = 0 );
    virtual ~ComposerViewBase();

    enum Confirmation { LetUserConfirm, NoConfirmationNeeded };
    enum MissingAttachment { NoMissingAttachmentFound, FoundMissingAttachmentAndSending, FoundMissingAttachmentAndAddedAttachment, FoundMissingAttachmentAndCancel };

    enum FailedType { Sending, AutoSave };

    /**
   * Set the message to be opened in the composer window, and set the internal data structures to
   *  keep track of it.
   */
    void setMessage( const KMime::Message::Ptr& newMsg );

    void updateTemplate ( const KMime::Message::Ptr& msg );

    /**
   * Send the message with the specified method, saving it in the specified folder.
   */
    void send( MessageComposer::MessageSender::SendMethod method, MessageComposer::MessageSender::SaveIn saveIn, bool checkMailDispatcher = true);

    /**
   * Returns true if there is at least one composer job running.
   */
    bool isComposing() const;

    /**
   * Add the given attachment to the message.
   */
    void addAttachment( const KUrl &url, const QString &comment );
    void addAttachmentUrlSync ( const KUrl& url, const QString& comment );
    void addAttachment ( const QString& name, const QString& filename, const QString& charset, const QByteArray& data, const QByteArray& mimeType );
    void addAttachmentPart( KMime::Content* part );

    MessageComposer::Composer* createSimpleComposer();

    /**
    * Header fields in recipients editor.
    */
    QString to() const;
    QString cc() const;
    QString bcc() const;
    QString from() const;
    QString replyTo() const;
    QString subject() const;

    /**
   * The following are for setting the various options and widgets in the
   *  composer.
   */
    void setAttachmentModel( MessageComposer::AttachmentModel* model );
    MessageComposer::AttachmentModel* attachmentModel();

    void setAttachmentController( MessageComposer::AttachmentControllerBase* controller );
    MessageComposer::AttachmentControllerBase* attachmentController();

    void setRecipientsEditor( MessageComposer::RecipientsEditor* recEditor );
    MessageComposer::RecipientsEditor* recipientsEditor();

    void setSignatureController( MessageComposer::SignatureController* sigController );
    MessageComposer::SignatureController* signatureController();

    void setIdentityCombo( KPIMIdentities::IdentityCombo* identCombo );
    KPIMIdentities::IdentityCombo* identityCombo();

    void setIdentityManager( KPIMIdentities::IdentityManager* identMan );
    KPIMIdentities::IdentityManager* identityManager();

    void setEditor( MessageComposer::KMeditor* editor );
    MessageComposer::KMeditor* editor();

    void setTransportCombo( MailTransport::TransportComboBox* transpCombo );
    MailTransport::TransportComboBox* transportComboBox();

    void setFccCombo( Akonadi::CollectionComboBox* fcc );
    Akonadi::CollectionComboBox* fccCombo();
    void setFcc( const Akonadi::Collection& id );

    /**
   * Widgets for editing differ in client classes, so
   *  values are set before sending.
   */
    void setFrom( const QString& from );
    void setReplyTo( const QString& replyTo );
    void setSubject( const QString& subject );

    /**
   * The following are various settings the user can modify when composing a message. If they are not set,
   *  the default values will be used.
   */
    void setCryptoOptions( bool sign, bool encrypt, Kleo::CryptoMessageFormat format, bool neverEncryptDrafts = false );
    void setCharsets( const QList< QByteArray >& charsets );
    void setMDNRequested( bool mdnRequested );
    void setUrgent( bool urgent );

    void setAutoSaveInterval( int interval );
    void setCustomHeader( const QMap<QByteArray, QString>&customHeader );

    /**
   * Enables/disables autosaving depending on the value of the autosave
   * interval.
   */
    void updateAutoSave();

    /**
    * Sets the filename to use when autosaving something. This is used when the client recovers
    * the autosave files: It calls this method, so that the composer uses the same filename again.
    * That way, the recovered autosave file is properly cleaned up in cleanupAutoSave():
    */
    void setAutoSaveFileName( const QString &fileName );

    /**
    * Stop autosaving and delete the autosaved message.
    */
    void cleanupAutoSave();

    void setParentWidgetForGui( QWidget* );

    /**
   * Check if the mail has references to attachments, but no attachments are added to it.
   * If missing attachments are found, a dialog to add new attachments is shown.
   * @param attachmentKeywords a list with the keywords that indicate an attachment should be present
   * @return NoMissingAttachmentFound, if there is attachment in email
   *         FoundMissingAttachmentAndCancelSending, if mail might miss attachment but sending
   *         FoundMissingAttachmentAndAddedAttachment, if mail might miss attachment and we added an attachment
   *         FoundMissingAttachmentAndCancel, if mail might miss attachment and cancel sending
   */
    ComposerViewBase::MissingAttachment checkForMissingAttachments( const QStringList &attachmentKeywords ) ;

    bool hasMissingAttachments( const QStringList& attachmentKeywords );

    void setSendLaterInfo( SendLater::SendLaterInfo *info);
    SendLater::SendLaterInfo *sendLaterInfo() const;

public slots:

    void identityChanged( const KPIMIdentities::Identity &ident, const KPIMIdentities::Identity &oldIdent, bool msgCleared = false);

    /**
   * Save the message.
   */
    void autoSaveMessage();

signals:
    /**
   * Message sending completed successfully.
   */
    void sentSuccessfully(const QString &messageId = QString());
    /**
   * Message sending failed with given error message.
   */
    void failed( const QString& errorMessage, MessageComposer::ComposerViewBase::FailedType type = Sending );

    /**
   * The composer was modified. This can happen behind the users' back
   *  when, for example, and autosaved message was recovered.
   */
    void modified( bool isModified );

    /**
   * Enabling or disabling HTML in the editor is affected
   *  by various client options, so when that would otherwise happen,
   *  hand it off to the client to enact it for real.
   */
    void disableHtml( MessageComposer::ComposerViewBase::Confirmation );
    void enableHtml();

private slots:
    void slotEmailAddressResolved( KJob* );
    void slotSendComposeResult( KJob* );
    void slotQueueResult( KJob *job );
    void slotCreateItemResult( KJob * );
    void slotAutoSaveComposeResult( KJob *job );
    void slotFccCollectionCheckResult( KJob *job );
    void slotSaveMessage( KJob *job );

private:
    Akonadi::Collection defaultSpecialTarget() const;
    /**
  * Searches the mime tree, where root is the root node, for embedded images,
  * extracts them froom the body and adds them to the editor.
  */
    void collectImages( KMime::Content* root );
    bool inlineSigningEncryptionSelected();
    /**
    * Applies the user changes to the message object of the composer
    * and signs/encrypts the message if activated.
    * Disables the controls of the composer window.
    */
    void readyForSending();

    enum RecipientExpansion { UseExpandedRecipients, UseUnExpandedRecipients };
    QList< MessageComposer::Composer* > generateCryptoMessages();
    void fillGlobalPart( MessageComposer::GlobalPart *globalPart );
    void fillInfoPart( MessageComposer::InfoPart *part, RecipientExpansion expansion );
    void queueMessage( KMime::Message::Ptr message, MessageComposer::Composer* composer );
    void saveMessage( KMime::Message::Ptr message, MessageComposer::MessageSender::SaveIn saveIn );
    void fillQueueJobHeaders( MailTransport::MessageQueueJob* qjob, KMime::Message::Ptr message, const MessageComposer::InfoPart* infoPart );
    QStringList cleanEmailList( const QStringList& emails );
    void saveRecentAddresses( KMime::Message::Ptr ptr );
    void updateRecipients( const KPIMIdentities::Identity &ident, const KPIMIdentities::Identity &oldIdent, MessageComposer::Recipient::Type type );

    void markAllAttachmentsForSigning(bool sign);
    void markAllAttachmentsForEncryption(bool encrypt);
    bool determineWhetherToSign(bool doSignCompletely , Kleo::KeyResolver *keyResolver, bool signSomething, bool & result);
    bool determineWhetherToEncrypt(bool doEncryptCompletely , Kleo::KeyResolver *keyResolver, bool encryptSomething, bool signSomething, bool & result);

    /**
  * Writes out autosave data to the disk from the KMime::Message message.
  * Also appends the msgNum to the filename as a message can have a number of
  * KMime::Messages
  */
    void writeAutoSaveToDisk( const KMime::Message::Ptr& message );

    /**
    * Returns the autosave interval in milliseconds (as needed for QTimer).
    */
    int autoSaveInterval() const;

    /**
    * Initialize autosaving (timer and filename).
    */
    void initAutoSave();


    KMime::Message::Ptr m_msg;
    MessageComposer::AttachmentControllerBase* m_attachmentController;
    MessageComposer::AttachmentModel* m_attachmentModel;
    MessageComposer::SignatureController* m_signatureController;
    MessageComposer::RecipientsEditor * m_recipientsEditor;
    KPIMIdentities::IdentityCombo *m_identityCombo;
    KPIMIdentities::IdentityManager* m_identMan;
    MessageComposer::KMeditor* m_editor;
    MailTransport::TransportComboBox* m_transport;
    Akonadi::CollectionComboBox* m_fccCombo;
    Akonadi::Collection m_fccCollection;
    QWidget* m_parentWidget;

    // List of active composer jobs. For example, saving as draft, autosaving and printing
    // all create a composer, which is added to this list as long as it is active.
    // Used mainly to prevent closing the window if a composer is active
    QList< MessageComposer::Composer* > m_composers;

    bool m_sign, m_encrypt, m_neverEncrypt, m_mdnRequested, m_urgent;
    Kleo::CryptoMessageFormat m_cryptoMessageFormat;
    QString mExpandedFrom, m_from, m_replyTo, m_subject;
    QStringList mExpandedTo, mExpandedCc, mExpandedBcc;
    QList< QByteArray > m_charsets;
    QMap<QByteArray, QString> m_customHeader;

    int m_pendingQueueJobs;

    QTimer *m_autoSaveTimer;
    QString m_autoSaveUUID;
    bool m_autoSaveErrorShown; // Stops an error message being shown every time autosave is executed.
    int m_autoSaveInterval;

    MessageComposer::MessageSender::SendMethod mSendMethod;
    MessageComposer::MessageSender::SaveIn mSaveIn;

    SendLater::SendLaterInfo *mSendLaterInfo;
};

} // namespace

#endif