// -*- mode: C++; c-file-style: "gnu" -*-

#ifndef _KMKERNEL_H
#define _KMKERNEL_H

#include "interfaces/mailinterfaces.h"

#include <QList>
#include <QObject>
#include <QPointer>
#include <QDBusObjectPath>
#include <Solid/Networking>

#include <kurl.h>

#include "kmail_export.h"
#include "settings/globalsettings.h"
#include <kcomponentdata.h>
#include <akonadi/servermanager.h>
#include "messageviewer/viewer/viewer.h"
#include "progresswidget/progressmanager.h"


#define kmkernel KMKernel::self()
#define kmconfig KMKernel::config()


#include <QAbstractItemModel>
namespace Akonadi {
class Collection;
class ChangeRecorder;
class EntityTreeModel;
class EntityMimeTypeFilterModel;
}

namespace KIO {
class Job;
}


namespace MessageComposer {
class MessageSender;
}
namespace PimCommon {
class AutoCorrection;
class StorageServiceManager;
}

/** The KMail namespace contains classes used for KMail.
* This is to keep them out of the way from all the other
* un-namespaced classes in libs and the rest of PIM.
*/
namespace KMail {
class MailServiceImpl;
class UndoStack;
class KMSystemTray;
}
using KMail::MailServiceImpl;
using KMail::UndoStack;
namespace MessageComposer {
class AkonadiSender;
}

namespace KPIMIdentities {
class Identity;
class IdentityManager;
}

namespace MailCommon {
class Kernel;
class FolderCollection;
class FolderCollectionMonitor;
class JobScheduler;
class KMFilterDialog;
}

class KComponentData;
#include <QTimer>
class KMMainWin;
class KMainWindow;
class KMMainWidget;
class ConfigureDialog;
class FolderArchiveManager;

/**
 * @short Central point of coordination in KMail
 *
 * The KMKernel class represents the core of KMail, where the different parts
 * come together and are coordinated. It is currently also the class which exports
 * KMail's main D-BUS interfaces.
 *
 * The kernel is responsible for creating various
 * (singleton) objects such as the identity manager and the message sender.
 *
 * The kernel also creates an Akonadi Session, Monitor and EntityTreeModel. These
 * are shared so that other objects in KMail have access to it. Having only one EntityTreeModel
 * instead of many reduces the overall communication with the Akonadi server.
 *
 * The kernel also manages some stuff that should be factored out:
 * - default collection handling, like inboxCollectionFolder()
 * - job handling, like jobScheduler()
 * - handling of some config settings, like wrapCol()
 * - various other stuff
 */
class KMAIL_EXPORT KMKernel : public QObject, public MailCommon::IKernel, public MailCommon::ISettings, public MailCommon::IFilter
{
    Q_OBJECT
    Q_CLASSINFO("D-Bus Interface", "org.kde.kmail.kmail")

public:
    explicit KMKernel (QObject *parent=0);
    ~KMKernel ();

    /**
 * Start of D-Bus callable stuff. The D-Bus methods need to be public slots,
 * otherwise they can't be accessed.
 */
public Q_SLOTS:

    Q_SCRIPTABLE void checkMail();
    Q_SCRIPTABLE void openReader() { openReader( false ); }

    /**
   * Enables/disables systray icon changing when mail arrives.
   * With this disabled the systray icon will always be the same.
   */
    Q_SCRIPTABLE void setSystrayIconNotificationsEnabled( bool enabled );

    /**
   * Pauses all background jobs and does not
   * allow new background jobs to be started.
   */
    Q_SCRIPTABLE void pauseBackgroundJobs();

    /**
   * Resumes all background jobs and allows
   * new jobs to be started.
   */
    Q_SCRIPTABLE void resumeBackgroundJobs();

    /**
   * Stops all network related jobs and enter offline mode
   * New network jobs cannot be started.
   */
    Q_SCRIPTABLE void stopNetworkJobs();

    /**
   * Resumes all network related jobs and enter online mode
   * New network jobs can be started.
   */
    Q_SCRIPTABLE void resumeNetworkJobs();

    Q_SCRIPTABLE QStringList accounts();

    Q_SCRIPTABLE void makeResourceOnline(MessageViewer::Viewer::ResourceOnlineMode mode);

    /**
   * Checks the account with the specified name for new mail.
   * If the account name is empty, all accounts not excluded from manual
   * mail check will be checked.
   */
    Q_SCRIPTABLE void checkAccount( const QString & account );

    Q_SCRIPTABLE bool selectFolder( const QString & folder );

    Q_SCRIPTABLE bool canQueryClose();

    Q_SCRIPTABLE bool handleCommandLine( bool noArgsOpensReader );

    /**
   * Opens a composer window and prefills it with different
   * message parts.
   *
   * @returns The id of composer if more are opened.
   *
   * @param to A comma separated list of To addresses.
   * @param cc A comma separated list of CC addresses.
   * @param bcc A comma separated list of BCC addresses.
   * @param subject The message subject.
   * @param body The message body.
   * @param hidden Whether the composer window shall initially be hidden.
   * @param messageFile A message file that will be used as message body.
   * @param attachmentPaths A list of files that will be attached to the message.
   * @param customHeaders A list of custom headers.
   */
    Q_SCRIPTABLE int openComposer(const QString & to,
                                  const QString & cc,
                                  const QString & bcc,
                                  const QString & subject,
                                  const QString & body,
                                  bool hidden,
                                  const QString & messageFile,
                                  const QStringList & attachmentPaths,
                                  const QStringList & customHeaders , const QString &replyTo = QString(), const QString &inReplyTo = QString());

    /**
   * Opens a composer window and prefills it with different
   * message parts.
   *
   * @returns The id of composer if more are opened.
   *
   * @param to A comma separated list of To addresses.
   * @param cc A comma separated list of CC addresses.
   * @param bcc A comma separated list of BCC addresses.
   * @param subject The message subject.
   * @param body The message body.
   * @param hidden Whether the composer window shall initially be hidden.
   * @param attachName The name of the attachment.
   * @param attachCte The content transfer encoding of the attachment.
   * @param attachData The raw data of the attachment.
   * @param attachType The mime type of the attachment.
   * @param attachSubType The sub mime type of the attachment.
   * @param attachParamAttr The parameter attribute of the attachment.
   * @param attachParamValue The parameter value of the attachment.
   * @param attachContDisp The content display type of the attachment.
   * @param attachCharset The charset of the attachment.
   * @param identity The identity identifier which will be used as sender identity.
   */
    Q_SCRIPTABLE int openComposer( const QString & to,
                                   const QString & cc,
                                   const QString & bcc,
                                   const QString & subject,
                                   const QString & body,
                                   bool hidden,
                                   const QString & attachName,
                                   const QByteArray & attachCte,
                                   const QByteArray  &attachData,
                                   const QByteArray & attachType,
                                   const QByteArray & attachSubType,
                                   const QByteArray & attachParamAttr,
                                   const QString & attachParamValue,
                                   const QByteArray & attachContDisp,
                                   const QByteArray & attachCharset,
                                   unsigned int identity );

    /**
   * Opens a composer window and prefills it with different
   * message parts.
   *
   * @returns The DBus object path for the composer.
   *
   * @param to A comma separated list of To addresses.
   * @param cc A comma separated list of CC addresses.
   * @param bcc A comma separated list of BCC addresses.
   * @param subject The message subject.
   * @param body The message body.
   * @param hidden Whether the composer window shall initially be hidden.
   */
    Q_SCRIPTABLE QDBusObjectPath openComposer( const QString & to,
                                               const QString & cc,
                                               const QString & bcc,
                                               const QString & subject,
                                               const QString & body,
                                               bool hidden );

    /**
   * Opens a composer window and prefills it with different
   * message parts.
   *
   * @returns The DBus object path for the composer.
   *
   * @param to A comma separated list of To addresses.
   * @param cc A comma separated list of CC addresses.
   * @param bcc A comma separated list of BCC addresses.
   * @param subject The message subject.
   * @param body The message body.
   * @param hidden Whether the composer window shall initially be hidden.
   * @param useFolderId The id of the folder whose associated identity will be used.
   * @param messageFile A message file that will be used as message body.
   * @param attachURL The URL to the file that will be attached to the message.
   */
    Q_SCRIPTABLE QDBusObjectPath newMessage( const QString & to,
                                             const QString & cc,
                                             const QString & bcc,
                                             bool hidden,
                                             bool useFolderId,
                                             const QString & messageFile,
                                             const QString & attachURL );

    Q_SCRIPTABLE bool showMail( qint64 serialNumber );

    Q_SCRIPTABLE int viewMessage( const QString & messageFile );

    Q_SCRIPTABLE void updateConfig();

    Q_SCRIPTABLE void showFolder(const QString &collectionId);

    Q_SCRIPTABLE void reloadFolderArchiveConfig();

    /**
 * End of D-Bus callable stuff
 */


public:
    void checkMailOnStartup();

    /** A static helper function that asks the user
   * if they want to go online.
   * @return true if the user wants to go online
   * @return false if the user wants to stay offline
   */
    static bool askToGoOnline();

    /** Checks if the current network state is online or offline
   * @return true if the network state is offline
   * @return false if the network state is online
   */
    static bool isOffline();

    /** normal control stuff */

    static KMKernel *self();
    /*reimp*/ KSharedConfig::Ptr config();
    /*reimp*/ void syncConfig();

    void init();
    void setupDBus();

    /*reimp*/ Akonadi::ChangeRecorder *folderCollectionMonitor() const;

    /**
   * Returns the main model, which contains all folders and the items of recently opened folders.
   */
    Akonadi::EntityTreeModel *entityTreeModel() const;

    /**
   * Returns a model of all folders in KMail. This is basically the same as entityTreeModel(),
   * but with items filtered out, the model contains only collections.
   */
    /*reimp*/ Akonadi::EntityMimeTypeFilterModel *collectionModel() const;

    void recoverDeadLetters();
    void closeAllKMailWindows();
    void cleanup(void);
    void quit();
    bool doSessionManagement();
    bool firstInstance() const { return the_firstInstance; }
    void setFirstInstance(bool value) { the_firstInstance = value; }
    void action(bool mailto, bool check, const QString &to, const QString &cc,
                const QString &bcc, const QString &subj, const QString &body,
                const KUrl &messageFile, const KUrl::List &attach,
                const QStringList &customHeaders , const QString &replyTo, const QString &inReplyTo);

    bool isImapFolder(const Akonadi::Collection& , bool &isOnline) const;

    //sets online status for akonadi accounts. true for online, false for offline
    void setAccountStatus(bool);

    const KComponentData &xmlGuiInstance() { return mXmlGuiInstance; }
    void setXmlGuiInstance( const KComponentData &instance ) { mXmlGuiInstance = instance; }

    UndoStack *undoStack() const { return the_undoStack; }
    MessageComposer::MessageSender *msgSender();

    /*reimp*/ void openFilterDialog(bool createDummyFilter = true);
    /*reimp*/ void createFilter(const QByteArray& field, const QString& value);

    /** return the pointer to the identity manager */
    /*reimp*/ KPIMIdentities::IdentityManager *identityManager();

    /*reimp*/ MailCommon::JobScheduler* jobScheduler() const { return mJobScheduler; }

    /** Expire all folders, used for the gui action */
    void expireAllFoldersNow();

    bool firstStart() const { return the_firstStart; }
    QString previousVersion() const { return the_previousVersion; }
    bool shuttingDown() const { return the_shuttingDown; }
    void setShuttingDown(bool flag) { the_shuttingDown = flag; }

    /** Returns the full path of the user's local data directory for KMail.
      The path ends with '/'.
  */
    static QString localDataPath();

    /** Returns true if we have a system tray applet. This is needed in order
   *  to know whether the application should be allowed to exit in case the
   *  last visible composer or separate message window is closed.
   */
    bool haveSystemTrayApplet() const;

    QTextCodec *networkCodec() const { return netCodec; }

    /** returns a reference to the first Mainwin or a temporary Mainwin */
    KMainWindow* mainWin();

    /** Get first mainwidget */
    KMMainWidget *getKMMainWidget();

    /**
   * Returns a list of all currently loaded folders. Since folders are loaded async, this
   * is empty at startup.
   */
    Akonadi::Collection::List allFolders() const;
    //
    void selectCollectionFromId( const Akonadi::Collection::Id id);

    void raise();

    void stopAgentInstance();

    //ISettings
    /*reimp*/ bool showPopupAfterDnD();

    /*reimp*/ bool excludeImportantMailFromExpiry();

    /*reimp*/ qreal closeToQuotaThreshold();

    /*reimp*/ Akonadi::Collection::Id lastSelectedFolder();
    /*reimp*/ void setLastSelectedFolder( const Akonadi::Collection::Id  &col );

    /*reimp*/ QStringList customTemplates();

    void checkFolderFromResources( const Akonadi::Collection::List& collectionList );

    const QAbstractItemModel* treeviewModelSelection();

    void savePaneSelection();

    void updatePaneTagComboBox();


    PimCommon::AutoCorrection* composerAutoCorrection();

    void toggleSystemTray();
    FolderArchiveManager *folderArchiveManager() const;
    PimCommon::StorageServiceManager *storageServiceManager() const;

    bool allowToDebugBalooSupport() const;

protected:
    void agentInstanceBroken( const Akonadi::AgentInstance& instance );


public slots:

    /*reimp*/ void updateSystemTray();

    /** Custom templates have changed, so all windows using them need
      to regenerate their menus */
    void updatedTemplates();

    /// Save contents of all open composer widnows to ~/dead.letter
    void dumpDeadLetters();

    /** Call this slot instead of directly KConfig::sync() to
      minimize the overall config writes. Calling this slot will
      schedule a sync of the application config file using a timer, so
      that many consecutive calls can be condensed into a single
      sync, which is more efficient. */
    void slotRequestConfigSync();

    /**
   * Sync the config immediatley
   */
    void slotSyncConfig();

    void slotShowConfigurationDialog();
    void slotRunBackgroundTasks();

    void slotConfigChanged();

signals:
    void configChanged();
    void onlineStatusChanged( GlobalSettings::EnumNetworkState::type );
    void customTemplatesChanged();

    void startCheckMail();
    void endCheckMail();

private slots:
    /** Updates identities when a transport has been deleted. */
    void transportRemoved( int id, const QString &name );
    /** Updates identities when a transport has been renamed. */
    void transportRenamed( int id, const QString &oldName, const QString &newName );
    void itemDispatchStarted();
    void instanceStatusChanged( const Akonadi::AgentInstance &);

    void akonadiStateChanged( Akonadi::ServerManager::State );
    void slotProgressItemCompletedOrCanceled( KPIM::ProgressItem * item);
    void slotInstanceError(const Akonadi::AgentInstance& instance, const QString & message);
    void slotInstanceWarning(const Akonadi::AgentInstance&instance, const QString& message);
    void slotCollectionRemoved(const Akonadi::Collection& col);
    void slotDeleteIdentity( uint identity);
    void slotInstanceRemoved(const Akonadi::AgentInstance&);
    void slotSystemNetworkStatusChanged( Solid::Networking::Status );
    void slotCollectionChanged(const Akonadi::Collection &, const QSet<QByteArray> &set);

    void slotCheckAccount(Akonadi::ServerManager::State state);
private:
    void verifyAccount();
    void resourceGoOnLine();
    void openReader( bool onlyCheck );
    QSharedPointer<MailCommon::FolderCollection> currentFolderCollection();

    UndoStack *the_undoStack;
    mutable KPIMIdentities::IdentityManager *mIdentityManager;
    MessageComposer::AkonadiSender *the_msgSender;
    /** previous KMail version. If different from current,
      the user has just updated. read from config */
    QString the_previousVersion;
    /** is this the first start?  read from config */
    bool the_firstStart;
    /** are we going down? set from here */
    bool the_shuttingDown;
    /** true unles kmail is closed by session management */
    bool the_firstInstance;

    KSharedConfig::Ptr mConfig;
    QTextCodec *netCodec;
    KComponentData mXmlGuiInstance;
    ConfigureDialog *mConfigureDialog;

    QTimer *mBackgroundTasksTimer;
    MailCommon::JobScheduler* mJobScheduler;
    // temporary mainwin
    KMMainWin *mWin;
    MailServiceImpl *mMailService;

    Solid::Networking::Status mSystemNetworkStatus;

    KMail::KMSystemTray* mSystemTray;
    QHash<QString, KPIM::ProgressItem::CryptoStatus> mResourceCryptoSettingCache;
    MailCommon::FolderCollectionMonitor *mFolderCollectionMonitor;
    Akonadi::EntityTreeModel *mEntityTreeModel;
    Akonadi::EntityMimeTypeFilterModel *mCollectionModel;

    /// List of Akonadi resources that are currently being checked.
    QList<QString> mResourcesBeingChecked;

    QPointer<MailCommon::KMFilterDialog> mFilterEditDialog;
    PimCommon::AutoCorrection *mAutoCorrection;
    FolderArchiveManager *mFolderArchiveManager;
    PimCommon::StorageServiceManager *mStorageManager;
    bool mDebugBaloo;
};

#endif // _KMKERNEL_H