#ifndef UA_CHANNEL_MANAGER_H_
#define UA_CHANNEL_MANAGER_H_

#include "ua_util.h"
#include "ua_server.h"
#include "ua_securechannel.h"
#include "queue.h"

typedef struct channel_list_entry {
    UA_SecureChannel channel;
    LIST_ENTRY(channel_list_entry) pointers;
} channel_list_entry;

typedef struct UA_SecureChannelManager {
    LIST_HEAD(channel_list, channel_list_entry) channels; // doubly-linked list of channels
    size_t maxChannelCount;
    size_t currentChannelCount;
    UA_UInt32 maxChannelLifetime;
    UA_MessageSecurityMode securityMode;
    UA_DateTime channelLifeTime;
    UA_UInt32 lastChannelId;
    UA_UInt32 lastTokenId;
    UA_Server *server;
} UA_SecureChannelManager;

UA_StatusCode
UA_SecureChannelManager_init(UA_SecureChannelManager *cm, size_t maxChannelCount,
                             UA_UInt32 tokenLifetime, UA_UInt32 startChannelId,
                             UA_UInt32 startTokenId, UA_Server *server);

void UA_SecureChannelManager_deleteMembers(UA_SecureChannelManager *cm);

void UA_SecureChannelManager_cleanupTimedOut(UA_SecureChannelManager *cm, UA_DateTime now);

UA_StatusCode
UA_SecureChannelManager_open(UA_SecureChannelManager *cm, UA_Connection *conn,
                             const UA_OpenSecureChannelRequest *request,
                             UA_OpenSecureChannelResponse *response);

UA_StatusCode
UA_SecureChannelManager_renew(UA_SecureChannelManager *cm, UA_Connection *conn,
                              const UA_OpenSecureChannelRequest *request,
                              UA_OpenSecureChannelResponse *response);

UA_SecureChannel *
UA_SecureChannelManager_get(UA_SecureChannelManager *cm, UA_UInt32 channelId);

UA_StatusCode
UA_SecureChannelManager_close(UA_SecureChannelManager *cm, UA_UInt32 channelId);

#endif /* UA_CHANNEL_MANAGER_H_ */