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#ifndef IMAPCLIENT_H
#define IMAPCLIENT_H

#include <QObject>
#include <QString>
#include <QStringList>
#include <QList>
#include <QTimer>

#include "imapprotocol.h"

#include <qmailfolder.h>
#include <qmailmessage.h>
#include <qmailmessageclassifier.h>
#include <qmailmessageserver.h>


class ImapStrategy;
class ImapStrategyContext;
class IdleProtocol;
class QMailMessageBufferFlushCallback;

class ImapClient : public QObject
{
    Q_OBJECT

public:
    ImapClient(const QMailAccountId& accountId, QObject* parent);
    ~ImapClient();

    QMailAccountId account() const;
    void requestRapidClose() { _requestRapidClose = true; } // Close connection ASAP, unless interactive checking occurred recently

    void newConnection();
    void cancelTransfer(QMailServiceAction::Status::ErrorCode code, const QString &text);
    void closeConnection();

    ImapStrategyContext *strategyContext();

    ImapStrategy *strategy() const;
    void setStrategy(ImapStrategy *strategy);

    QMailFolderId mailboxId(const QString &path) const;
    QMailFolderIdList mailboxIds() const;

    QStringList serverUids(const QMailFolderId &folderId) const;
    QStringList serverUids(const QMailFolderId &folderId, quint64 messageStatusFilter, bool set = true) const;
    QStringList serverUids(QMailMessageKey key) const;
    QMailMessageKey messagesKey(const QMailFolderId &folderId) const;
    QMailMessageKey trashKey(const QMailFolderId &folderId) const;
    QStringList deletedMessages(const QMailFolderId &folderId) const;

    bool isPushEmailEstablished();
    void stopIdleConnections() { monitor(QMailFolderIdList()); }
    QMailFolderIdList configurationIdleFolderIds();
    void removeAllFromBuffer(QMailMessage *message);
    int pushConnectionsReserved() { return _pushConnectionsReserved; }
    void setPushConnectionsReserved(int reserved) { _pushConnectionsReserved = reserved; }
    void setIdlingForFolder(const QMailFolderId &id); // internal

signals:
    void errorOccurred(int, const QString &);
    void errorOccurred(QMailServiceAction::Status::ErrorCode, const QString &);
    void updateStatus(const QString &);
    void pushEmailError();
    void renewPushEmail();

    void progressChanged(uint, uint);
    void retrievalCompleted();

    void messageCopyCompleted(QMailMessage &message, const QMailMessage &original);

    void messageActionCompleted(const QString &uid);

    void matchingMessageIds(const QMailMessageIdList &messages);
    void remainingMessagesCount(uint);
    void messagesCount(uint);

    void allMessagesReceived();
    void idleNewMailNotification(QMailFolderId);
    void idleFlagsChangedNotification(QMailFolderId);
    void sessionError();

public slots:
    void transportError(int, const QString &msg);
    void transportError(QMailServiceAction::Status::ErrorCode, const QString &msg);

    void mailboxListed(const QString &, const QString &);
    void messageFetched(QMailMessage& mail, const QString &detachedFilename, bool structureOnly);
    void dataFetched(const QString &uid, const QString &section, const QString &fileName, int size);
    void partHeaderFetched(const QString &uid, const QString &section, const QString &fileName, int size);
    void nonexistentUid(const QString &uid);
    void messageStored(const QString &);
    void messageCopied(const QString &, const QString &);
    void messageCreated(const QMailMessageId &, const QString &);
    void downloadSize(const QString &uid, int);
    void urlAuthorized(const QString &url);
    void folderDeleted(const QMailFolder &folder, bool success);
    void folderCreated(const QString &folder, bool success);
    void folderRenamed(const QMailFolder &folder, const QString &newName, bool success);
    void folderMoved(const QMailFolder &folder, const QString &newName, const QMailFolderId &newParentId, bool success);

protected slots:
    void connectionInactive();
    void commandCompleted(const ImapCommand, const OperationStatus);
    void checkCommandResponse(const ImapCommand, const OperationStatus);
    void commandTransition(const ImapCommand, const OperationStatus);
    void transportStatus(const QString& status);
    void messageBufferFlushed();
    void onCredentialsStatusChanged();

private:
    friend class ImapStrategyContextBase;

    void setupAccount() const;
    void deactivateConnection();
    void retrieveOperationCompleted();

    void logIn();
    void monitor(const QMailFolderIdList &mailboxIds);

    void operationFailed(int code, const QString &text);
    void operationFailed(QMailServiceAction::Status::ErrorCode code, const QString &text);

    void updateFolderCountStatus(QMailFolder *folder);

    static const int MaxTimeBeforeNoop = 60 * 1000; // 1 minute (this must be >= 1ms)
    QMailAccountId _accountId;

    ImapProtocol _protocol;
    QTimer _inactiveTimer;
    int _closeCount;

    QMailFolderIdList _waitingForIdleFolderIds;
    bool _qresyncEnabled;
    bool _requestRapidClose;
    bool _rapidClosing;
    QTimer _idleTimer;

    QMailMessageClassifier _classifier;
    ImapStrategyContext *_strategyContext;

    QMap<QMailFolderId, IdleProtocol*> _monitored;
    QList<QMailMessageBufferFlushCallback*> callbacks;
    QVector<QMailMessage*> _bufferedMessages;
    int _pushConnectionsReserved;

    QMultiMap<QMailMessageId,QString> detachedTempFiles;

    QMailCredentialsInterface *_credentials;
    bool _loginFailed;
};

#endif