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open Liquidity_baking_repr

let get_cpmm_address = Storage.Liquidity_baking.Cpmm_address.get

let get_toggle_ema ctxt =
  Storage.Liquidity_baking.Toggle_ema.get ctxt >>=? fun ema ->
  Toggle_EMA.of_int32 ema

let on_cpmm_exists ctxt f =
  get_cpmm_address ctxt >>=? fun cpmm_contract ->
  Contract_storage.exists ctxt (Contract_repr.Originated cpmm_contract)
  >>= function
  | false ->
      (* do nothing if the cpmm is not found *)
      return (ctxt, [])
  | true -> f ctxt cpmm_contract

let update_toggle_ema ctxt ~toggle_vote =
  get_toggle_ema ctxt >>=? fun old_ema ->
  let new_ema = compute_new_ema ~toggle_vote old_ema in
  Storage.Liquidity_baking.Toggle_ema.update ctxt (Toggle_EMA.to_int32 new_ema)
  >|=? fun ctxt -> (ctxt, new_ema)

let check_ema_below_threshold ctxt ema =
  Toggle_EMA.(
    ema < Constants_storage.liquidity_baking_toggle_ema_threshold ctxt)

let on_subsidy_allowed ctxt ~toggle_vote f =
  update_toggle_ema ctxt ~toggle_vote >>=? fun (ctxt, toggle_ema) ->
  if check_ema_below_threshold ctxt toggle_ema then
    on_cpmm_exists ctxt f >|=? fun (ctxt, operation_results) ->
    (ctxt, operation_results, toggle_ema)
  else return (ctxt, [], toggle_ema)