#pragma once
/*
* Copyright Onix Solutions Limited [OnixS]. All rights reserved.
*
* This software owned by Onix Solutions Limited [OnixS] and is protected by copyright law
* and international copyright treaties.
*
* Access to and use of the software is governed by the terms of the applicable OnixS Software
* Services Agreement (the Agreement) and Customer end user license agreements granting
* a non-assignable, non-transferable and non-exclusive license to use the software
* for it's own data processing purposes under the terms defined in the Agreement.
*
* Except as otherwise granted within the terms of the Agreement, copying or reproduction of any part
* of this source code or associated reference material to any other location for further reproduction
* or redistribution, and any amendments to this copyright notice, are expressly prohibited.
*
* Any reproduction or redistribution for sale or hiring of the Software not in accordance with
* the terms of the Agreement is a violation of copyright law.
*/

#include <string>
#include <set>
#include <vector>

#include <OnixS/FIXEngine/Compiler.h>
#include <OnixS/FIXEngine/FIX/Timestamp.h>
#include <OnixS/FIXEngine/FIX/Dictionary.h>

namespace OnixS {
namespace FIX {
ONIXS_FIXENGINE_API_DECL(class, IEngineListener);
ONIXS_FIXENGINE_API_DECL(class, ISessionReactor);
ONIXS_FIXENGINE_API_DECL(class, EngineSettings);

typedef std::vector<OnixS::FIX::Dictionary> Dictionaries;
typedef std::vector<int> ListenPorts;

/// The FIX Engine.
class ONIXS_FIXENGINE_API Engine
{
public:
    /// Initializes the FIX Engine.
    ///
    /// @param listenPort The engine listens on this port for incoming connections.
    /// If '0' then only session-initiators can be created.
    /// If '-1' then the telecommunication level is disabled and only the message parsing/assembling can be used.
    /// @param stack An instance of an externally managed reactor for acceptor sessions.
    ///
    /// @note This call is thread-safe.
    static Engine * init(int listenPort = 0, ISessionReactor * stack = ONIXS_FIXENGINE_NULLPTR);

    /// Initializes the FIX Engine.
    ///
    /// @param configFile The configuration file.
    /// @param stack An instance of an externally managed reactor for acceptor sessions.
    ///
    /// @note This call is thread-safe.
    static Engine * init(const std::string & configFile, ISessionReactor * stack = ONIXS_FIXENGINE_NULLPTR);

    /// Initializes the FIX Engine.
    ///
    /// @param configuration The configuration string.
    /// @param stack An instance of an externally managed reactor for acceptor sessions.
    ///
    /// @note This call is thread-safe.
    static Engine * initFromString(const std::string & configuration, ISessionReactor * stack = ONIXS_FIXENGINE_NULLPTR);

    /// Initializes the FIX Engine.
    ///
    /// @param settings Engine settings.
    /// @param stack An instance of an externally managed reactor for acceptor sessions.
    ///
    /// @note This call is thread-safe.
    static Engine * init(const EngineSettings & settings, ISessionReactor * stack = ONIXS_FIXENGINE_NULLPTR);

    /// Logs the given user's message to FIX Engine's log file.
    ///
    /// @note This call is thread-safe.
    void log(const std::string & message);

    /// Shutdowns the FIX Engine and releases all resources.
    ///
    /// @note This call is thread-safe.
    static void shutdown();

    /// Returns the Engine instance.
    ///
    /// @throw The OnixS::DomainException if the FIX Engine has not been initialized yet.
    ///
    /// @note This call is thread-safe.
    static Engine * instance();

    /// Returns 'true' if the FIX Engine has been initialized, otherwise - 'false'.
    ///
    /// @note This call is thread-safe.
    static bool initialized();

    /// Returns the listen port.
    ///
    /// The FIX Engine listens on this port for incoming connections.
    int listenPort() const;

    /// Returns the Engine log directory.
    ///
    /// Inbound and outbound FIX messages, session's state data,
    /// and the FIX Engine log file are stored in this directory.
    const std::string & logDirectory() const;

    /// Returns the Engine's license expiration date.
    Timestamp licenseExpirationDate() const;

    /// Returns the array of loaded dictionaries.
    Dictionaries dictionaries() const;

    /// Adds the session level dictionary(s) from the XML file(s) with the description of the FIX Dictionary(s).
    /// @note More than one file could be specified. The symbol '|' is used as the file name delimiter.
    /// @param dictionaryFile Specifies the path(s) to the XML file(s) with the description of the FIX Dictionary(s).
    /// @throw The OnixS::DomainException if there are standard dictionary(s) in the XML file(s).
    ///
    /// @note This call is thread-safe.
    void addSessionDictionary(const std::string & dictionaryFile);

    /// Adds the session level dictionary(s) from the plain text string with the description of the FIX Dictionary(s).
    /// @param dialectString Specifies the plain text string with the description of the FIX Dictionary(s).
    /// @throw The OnixS::DomainException if there are standard dictionary(s) in the dialect string.
    ///
    /// @note This call is thread-safe.
    void addSessionDictionaryFromString(const std::string & dialectString);

    /// Adds the listen port(s) for incoming connections.
    /// @throw An exception if the FIX Engine cannot start listening on the specified port(s) or the telecommunication level is disabled (the Listen Port is -1 or 0).
    ///
    /// @note This call is thread-safe.
    void addListenPort(int port);
    void addListenPorts(const ListenPorts & ports);

    /// Removes the listen port(s) for incoming connections.
    /// @throw An exception if the telecommunication level is disabled (the Listen Port is -1 or 0).
    ///
    /// @note This call is thread-safe.
    void removeListenPort(int port);
    void removeListenPorts(const ListenPorts & ports);

    /// Adds the ssl listen port(s) for incoming ssl connections.
    /// @throw An exception if the FIX Engine cannot start listening on the specified ssl port(s) or the telecommunication level is disabled (the Listen Port is -1 or 0).
    ///
    /// @note This call is thread-safe.
    void addSslListenPort(int port);
    void addSslListenPorts(const ListenPorts & ports);

    /// Removes the ssl listen port(s) for incoming ssl connections.
    /// @throw An exception if the telecommunication level is disabled (the Listen Port is -1 or 0).
    ///
    /// @note This call is thread-safe.
    void removeSslListenPort(int port);
    void removeSslListenPorts(const ListenPorts & ports);

    /// Registers the Engine listener.
    ///  @throw An exception if the listener is already registered.
    ///
    /// @note This call is thread-safe.
    void registerListener(IEngineListener * listener);

    /// Unregisters the Engine listener.
    ///
    /// @note This call is thread-safe.
    void unregisterListener();

    /// Performs the synchronization of the high-resolution internal time service with the system time on the Windows OS.
    /// On OSes less than Windows 8 and Windows Server 2012, the internal high-resolution time service, is based on the QueryPerformanceCounter API.
    /// This service is synchronized with the system time only once when an application is started, as a result, a time difference can occur in time.
    /// Therefore, for such old windows versions, it makes sense to synchronize the internal time service periodically (e.g. once per day) with the system time to avoid time drift issues.
    ///
    /// @throw An exception if there is a session in the non-disconnected state.
    ///
    /// @note This call is thread-safe.
    /// @note The method should be called when all sessions are disconnected to avoid time resynchronization side effects.
    void synchronizeHighResolutionTimeServiceWithSystemTime();

    /// Returns the current Engine-level settings.
    const EngineSettings & settings() const;

    class Impl;

private:
    Engine();
    ~Engine();
};

}
}