#ifndef SMTPCLIENT_H
#define SMTPCLIENT_H

#include <QObject>
#include <QtNetwork/QSslSocket>

#include "mimemessage.h"


class SmtpClient : public QObject
{
    Q_OBJECT
public:

    /* [0] Enumerations */

    enum AuthMethod
    {
        AuthPlain,
        AuthLogin
    };

    enum SmtpError
    {
        ConnectionTimeoutError,
        ResponseTimeoutError,
        AuthentificationFailedError,
        ServerError,    // 4xx smtp error
        ClientError     // 5xx smtp error
    };

    enum ConnectionType
    {
        TcpConnection,
        SslConnection
    };

    /* [0] --- */


    /* [1] Constructors and Destructors */

    SmtpClient(QString host = "locahost", int port = 25, ConnectionType ct = TcpConnection);

    ~SmtpClient();

    /* [1] --- */


    /* [2] Getters and Setters */

    const QString& getHost() const;
    void setHost(QString &host);

    int getPort() const;
    void setPort(int port);

    ConnectionType getConnectionType() const;
    void setConnectionType(ConnectionType ct);

    const QString & getUser() const;
    void setUser(const QString &host);

    const QString & getPassword() const;
    void setPassword(const QString &password);

    SmtpClient::AuthMethod getAuthMethod() const;
    void setAuthMethod(AuthMethod method);

    /* [2] --- */


    /* [3] Public methods */

    bool connectToHost();

    bool login();
    bool login(const QString &user, const QString &password, AuthMethod method = AuthLogin);

    bool sendMail(MimeMessage& email);

    void quit();

    /* [3] --- */

protected:

    /* [4] Protected members */

    QTcpSocket *socket;

    QString host;
    int port;
    bool useSsl;

    QString user;
    QString password;
    AuthMethod authMethod;

    int connectionTimeout;
    int responseTimeout;

    QString responseText;
    int responseCode;

    class ResponseTimeoutException {};

    /* [4] --- */


    /* [5] Protected methods */

    void waitForResponse() throw (ResponseTimeoutException);

    void sendMessage(const QString &text);

    /* [5] --- */

protected slots:

    /* [6] Protected slots */

    void socketStateChanged(QAbstractSocket::SocketState state);
    void socketError(QAbstractSocket::SocketError error);
    void socketReadyRead();

    /* [6] --- */


signals:

    /* [7] Signals */

    void smtpError(SmtpError e);

    /* [7] --- */

};

#endif // SMTPCLIENT_H