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#ifndef __ST__UTIL__
#define __ST__UTIL__

#include "configreader.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"

/* Foward declarations */
class TreeServer;
class TreeSocket;
class Link;
class ModuleSpanningTree;

/* This hash_map holds the hash equivalent of the server
 * tree, used for rapid linear lookups.
 */
typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;

typedef std::map<TreeServer*,TreeServer*> TreeServerList;

/** A group of modules that implement InspSocketHook
 * that we can use to hook our server to server connections.
 */
typedef std::map<irc::string, Module*> hookmodules;

/** Contains helper functions and variables for this module,
 * and keeps them out of the global namespace
 */
class SpanningTreeUtilities
{
 private:
        /** Creator server
         */
        InspIRCd* ServerInstance;
 public:
        /** Creator module
         */
        ModuleSpanningTree* Creator;
        /** Flatten links and /MAP for non-opers
         */
        bool FlatLinks;
        /** Hide U-Lined servers in /MAP and /LINKS
         */
        bool HideULines;
        /** Announce TS changes to channels on merge
         */
        bool AnnounceTSChange;
        /** Synchronize timestamps between servers
         */
        bool EnableTimeSync;
        /** Socket bindings for listening sockets
         */
        std::vector<TreeSocket*> Bindings;
        /** This variable represents the root of the server tree
         */
        TreeServer *TreeRoot;
        /** IPs allowed to link to us
         */
        std::vector<std::string> ValidIPs;
        /** Hash of currently connected servers by name
         */
        server_hash serverlist;
        /** Holds the data from the <link> tags in the conf
         */
        std::vector<Link> LinkBlocks;
        /** Holds a bitmask of queued xline types waiting to be applied.
         * Will be a mask containing values APPLY_GLINES, APPLY_KLINES,
         * APPLY_QLINES and APPLY_ZLINES.
         */
        int lines_to_apply;

        hookmodules hooks;
        std::vector<std::string> hooknames;

        /** Initialise utility class
         */
        SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
        /** Destroy class and free listeners etc
         */
        ~SpanningTreeUtilities();
        /** Send a message from this server to one other local or remote
         */
        bool DoOneToOne(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string target);
        /** Send a message from this server to all but one other, local or remote
         */
        bool DoOneToAllButSender(const std::string &prefix, const std::string &command, std::deque<std::string> &params, std::string omit);
        /** Send a message from this server to all but one other, local or remote
         */
        bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
        /** Send a message from this server to all others
         */
        bool DoOneToMany(const std::string &prefix, const std::string &command, std::deque<std::string> &params);
        /** Send a message from this server to all others
         */
        bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
        /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
         */
        bool DoOneToAllButSenderRaw(const std::string &data, const std::string &omit, const std::string &prefix, const irc::string &command, std::deque<std::string> &params);
        /** Read the spanningtree module's tags from the config file
         */
        void ReadConfiguration(bool rebind);
        /** Add a server to the server list for GetListOfServersForChannel
         */
        void AddThisServer(TreeServer* server, TreeServerList &list);
        /** Compile a list of servers which contain members of channel c
         */
        void GetListOfServersForChannel(chanrec* c, TreeServerList &list, char status, const CUList &exempt_list);
        /** Find a server by name
         */
        TreeServer* FindServer(const std::string &ServerName);
        /** Find a route to a server by name
         */
        TreeServer* BestRouteTo(const std::string &ServerName);
        /** Find a server by glob mask
         */
        TreeServer* FindServerMask(const std::string &ServerName);
        /** Returns true if this is a server name we recognise
         */
        bool IsServer(const std::string &ServerName);
        /** Attempt to connect to the failover link of link x
         */
        void DoFailOver(Link* x);
        /** Find a link tag from a server name
         */
        Link* FindLink(const std::string& name);
};

#endif