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(* Open Source License                                                       *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com>     *)
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(** Manages all the voting related storage in Storage.Vote.  *)

(** Records a protocol proposal with the delegate that proposed it. *)
val record_proposal:
  Raw_context.t -> Protocol_hash.t -> Signature.Public_key_hash.t ->
  Raw_context.t tzresult Lwt.t

val recorded_proposal_count_for_delegate:
  Raw_context.t -> Signature.Public_key_hash.t ->
  int tzresult Lwt.t

(** Computes for each proposal how many delegates proposed it. *)
val get_proposals:
  Raw_context.t -> int32 Protocol_hash.Map.t tzresult Lwt.t

val clear_proposals: Raw_context.t -> Raw_context.t Lwt.t

(** Counts of the votes *)
type ballots = {
  yay: int32 ;
  nay: int32 ;
  pass: int32 ;
}

val ballots_encoding : ballots Data_encoding.t

val has_recorded_ballot : Raw_context.t -> Signature.Public_key_hash.t -> bool Lwt.t

(** Records a vote for a delegate, returns a {!Storage_error Existing_key} if
    the vote was already registered *)
val record_ballot:
  Raw_context.t -> Signature.Public_key_hash.t -> Vote_repr.ballot ->
  Raw_context.t tzresult Lwt.t

(** Computes the sum of the current ballots weighted by stake. *)
val get_ballots: Raw_context.t -> ballots tzresult Lwt.t
val get_ballot_list :
  Raw_context.t -> (Signature.Public_key_hash.t * Vote_repr.ballot) list Lwt.t
val clear_ballots: Raw_context.t -> Raw_context.t Lwt.t

val listings_encoding : (Signature.Public_key_hash.t * int32) list Data_encoding.t

(** Populates [!Storage.Vote.Listings] using the currently existing rolls and
    sets Listings_size. Delegates without rolls are not included in the listing. *)
val freeze_listings: Raw_context.t -> Raw_context.t tzresult Lwt.t
val clear_listings: Raw_context.t -> Raw_context.t tzresult Lwt.t

(** Returns the sum of all rolls of all delegates. *)
val listing_size: Raw_context.t -> int32 tzresult Lwt.t

(** Verifies the presence of a delegate in the listing. *)
val in_listings:
  Raw_context.t -> Signature.Public_key_hash.t -> bool Lwt.t
val get_listings : Raw_context.t -> (Signature.Public_key_hash.t * int32) list Lwt.t

val get_current_quorum: Raw_context.t -> int32 tzresult Lwt.t
val set_current_quorum: Raw_context.t -> int32 -> Raw_context.t tzresult Lwt.t

val get_current_period_kind:
  Raw_context.t -> Voting_period_repr.kind tzresult Lwt.t
val set_current_period_kind:
  Raw_context.t -> Voting_period_repr.kind -> Raw_context.t tzresult Lwt.t

val get_current_proposal:
  Raw_context.t -> Protocol_hash.t tzresult Lwt.t
val init_current_proposal:
  Raw_context.t -> Protocol_hash.t -> Raw_context.t tzresult Lwt.t
val clear_current_proposal: Raw_context.t -> Raw_context.t tzresult Lwt.t

(** Sets the initial quorum to 80% and period kind to proposal. *)
val init: Raw_context.t -> Raw_context.t tzresult Lwt.t