(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
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(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
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(* Software is furnished to do so, subject to the following conditions:      *)
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(* DEALINGS IN THE SOFTWARE.                                                 *)
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(*****************************************************************************)

module Id = P2p_peer_id
module Map = Id.Map
module Set = Id.Set
module Table = Id.Table

module Error_table :
  Tezos_error_monad.TzLwtreslib.Hashtbl.S_ES with type key = Table.key

module Filter : sig
  type t = Accepted | Running | Disconnected

  val rpc_arg : t Tezos_rpc.Arg.t
end

module State : sig
  type t = Accepted | Running | Disconnected

  val pp_digram : Format.formatter -> t -> unit

  val encoding : t Data_encoding.t

  val filter : Filter.t list -> t -> bool
end

module Info : sig
  type ('peer_meta, 'conn_meta) t = {
    score : float;
    trusted : bool;
    conn_metadata : 'conn_meta option;
    peer_metadata : 'peer_meta;
    state : State.t;
    id_point : P2p_connection.Id.t option;
    stat : P2p_stat.t;
    last_failed_connection : (P2p_connection.Id.t * Time.System.t) option;
    last_rejected_connection : (P2p_connection.Id.t * Time.System.t) option;
    last_established_connection : (P2p_connection.Id.t * Time.System.t) option;
    last_disconnection : (P2p_connection.Id.t * Time.System.t) option;
    last_seen : (P2p_connection.Id.t * Time.System.t) option;
    last_miss : (P2p_connection.Id.t * Time.System.t) option;
  }

  val encoding :
    'peer_meta Data_encoding.t ->
    'conn_meta Data_encoding.t ->
    ('peer_meta, 'conn_meta) t Data_encoding.t
end

module Pool_event : sig
  type kind =
    | Accepting_request
        (** We accepted a connection after authentifying the remote peer. *)
    | Rejecting_request
        (** We rejected a connection after authentifying the remote peer. *)
    | Request_rejected  (** The remote peer rejected our connection. *)
    | Connection_established
        (** We successfully established a authentified connection. *)
    | Disconnection  (** We decided to close the connection. *)
    | External_disconnection
        (** The connection was closed for external reason. *)

  type t = {kind : kind; timestamp : Time.System.t; point : P2p_connection.Id.t}

  val encoding : t Data_encoding.t
end