{-# LANGUAGE TypeFamilies  #-}
{-# LANGUAGE TypeOperators #-}
module PlutusLedgerApi.Test.V3.EvaluationContext
    ( costModelParamsForTesting
    , mCostModel
    , clearMachineCostModel
    , clearBuiltinCostModel
    ) where

import PlutusCore.Evaluation.Machine.BuiltinCostModel
import PlutusCore.Evaluation.Machine.ExBudgetingDefaults
import PlutusCore.Evaluation.Machine.MachineParameters
import PlutusLedgerApi.Test.Common.EvaluationContext as Common
import PlutusLedgerApi.V3 qualified as V3
import PlutusPrelude
import UntypedPlutusCore.Evaluation.Machine.Cek.CekMachineCosts


import Data.Int (Int64)
import Data.Map qualified as Map
import Data.Maybe

-- | Example values of costs for @PlutusV3@, in expected ledger order.
-- Suitable to be used in testing.
costModelParamsForTesting :: [(V3.ParamName, Int64)]
costModelParamsForTesting :: [(ParamName, Int64)]
costModelParamsForTesting = Map ParamName Int64 -> [(ParamName, Int64)]
forall k a. Map k a -> [(k, a)]
Map.toList (Map ParamName Int64 -> [(ParamName, Int64)])
-> Map ParamName Int64 -> [(ParamName, Int64)]
forall a b. (a -> b) -> a -> b
$ Maybe (Map ParamName Int64) -> Map ParamName Int64
forall a. HasCallStack => Maybe a -> a
fromJust (Maybe (Map ParamName Int64) -> Map ParamName Int64)
-> Maybe (Map ParamName Int64) -> Map ParamName Int64
forall a b. (a -> b) -> a -> b
$
    MCostModel -> Maybe (Map ParamName Int64)
forall p.
(IsParamName p, Ord p) =>
MCostModel -> Maybe (Map p Int64)
Common.extractCostModelParamsLedgerOrder MCostModel
mCostModel

-- | The PlutusV3 "cost model" is constructed by the v4 "cost model", by clearing v4 introductions.
mCostModel :: MCostModel
mCostModel :: MCostModel
mCostModel =
    -- nothing to clear because v4 does not exist (yet).
    (CostModel CekMachineCosts BuiltinCostModel -> MCostModel
toMCostModel CostModel CekMachineCosts BuiltinCostModel
defaultCekCostModelForTesting) MCostModel -> (MCostModel -> MCostModel) -> MCostModel
forall a b. a -> (a -> b) -> b
& (MBuiltinCostModel -> Identity MBuiltinCostModel)
-> MCostModel -> Identity MCostModel
forall machinecosts builtincosts1 builtincosts2 (f :: * -> *).
Functor f =>
(builtincosts1 -> f builtincosts2)
-> CostModel machinecosts builtincosts1
-> f (CostModel machinecosts builtincosts2)
builtinCostModel ((MBuiltinCostModel -> Identity MBuiltinCostModel)
 -> MCostModel -> Identity MCostModel)
-> (MBuiltinCostModel -> MBuiltinCostModel)
-> MCostModel
-> MCostModel
forall s t a b. ASetter s t a b -> (a -> b) -> s -> t
%~ MBuiltinCostModel -> MBuiltinCostModel
forall m. (m ~ MBuiltinCostModel) => m -> m
clearBuiltinCostModel'

{- | Assign to `mempty` those CEK constructs that @PlutusV3@ introduces (indirectly by introducing
a ledger language version with those CEK constructs).

This can be used to generate a (machine) cost model of the previous plutus version,
by omitting the generation of the costs concerning the missing @PlutusV3@ CEK constructs.
-}
clearMachineCostModel :: (m ~ MCekMachineCosts) => m -> m
clearMachineCostModel :: forall m. (m ~ MCekMachineCosts) => m -> m
clearMachineCostModel m
r = m
r
    { cekConstrCost  = mempty
    , cekCaseCost    = mempty
    }

{- | Assign to `mempty` those builtins that the @PlutusV3@ introduces.

This can be used to generate a (builtin) cost model of the previous version
by omitting the generation of the costs concerning the missing @PlutusV3@ builtins.
-}
clearBuiltinCostModel :: (m ~ MBuiltinCostModel) => m -> m
clearBuiltinCostModel :: forall m. (m ~ MBuiltinCostModel) => m -> m
clearBuiltinCostModel m
r = m
r
               { paramBls12_381_G1_add = mempty
               , paramBls12_381_G1_neg = mempty
               , paramBls12_381_G1_scalarMul = mempty
               , paramBls12_381_G1_equal = mempty
               , paramBls12_381_G1_hashToGroup = mempty
               , paramBls12_381_G1_compress = mempty
               , paramBls12_381_G1_uncompress = mempty
               , paramBls12_381_G2_add = mempty
               , paramBls12_381_G2_neg = mempty
               , paramBls12_381_G2_scalarMul = mempty
               , paramBls12_381_G2_equal = mempty
               , paramBls12_381_G2_hashToGroup = mempty
               , paramBls12_381_G2_compress = mempty
               , paramBls12_381_G2_uncompress = mempty
               , paramBls12_381_millerLoop = mempty
               , paramBls12_381_mulMlResult = mempty
               , paramBls12_381_finalVerify = mempty
               , paramKeccak_256 = mempty
               , paramBlake2b_224 = mempty
               -- , paramIntegerToByteString = mempty -- Required for V2
               -- , paramByteStringToInteger = mempty -- Required for V2
               , paramAndByteString = mempty
               , paramOrByteString = mempty
               , paramXorByteString = mempty
               , paramComplementByteString = mempty
               , paramReadBit = mempty
               , paramWriteBits = mempty
               , paramReplicateByte = mempty
               , paramShiftByteString = mempty
               , paramRotateByteString = mempty
               , paramCountSetBits = mempty
               , paramFindFirstSetBit = mempty
               , paramRipemd_160 = mempty
               , paramExpModInteger = mempty
               }


-- *** FIXME!!! ***
-- This is temporary to get the tests to pass
clearBuiltinCostModel' :: (m ~ MBuiltinCostModel) => m -> m
clearBuiltinCostModel' :: forall m. (m ~ MBuiltinCostModel) => m -> m
clearBuiltinCostModel' m
r = m
r
               { -- , paramIntegerToByteString = mempty -- Required for V2
               -- , paramByteStringToInteger = mempty -- Required for V2
                 paramExpModInteger = mempty
               }