-- SPDX-FileCopyrightText: 2021 Oxhead Alpha
-- SPDX-License-Identifier: LicenseRef-MIT-OA

{-# LANGUAGE UndecidableSuperClasses #-}

-- | Scope-related constraints used in Lorentz.
--
-- This contains constraints from "Morley.Michelson.Typed.Scope" modified for use
-- in Lorentz.
module Lorentz.Constraints.Scopes
  ( -- * Grouped constraints
    NiceComparable
  , NiceConstant
  , Dupable
  , NiceFullPackedValue
  , NicePackedValue
  , NiceParameter
  , NiceUntypedValue
  , NiceStorage
  , NiceStorageFull
  , NiceUnpackedValue
  , NiceViewable
  , NiceNoBigMap

    -- * Individual constraints (internals)
  , CanHaveBigMap
  , KnownValue
  , NoOperation
  , NoContractType
  , NoBigMap

  , -- * Re-exports
    withDict
  ) where

import Lorentz.Annotation (HasAnnotation)
import Morley.Michelson.Typed

-- We write these constraints as class + instance, rather than
-- type aliases, in order to allow their partial application.

-- | Gathers constraints, commonly required for values.
class (IsoValue a, Typeable a) => KnownValue a
instance (IsoValue a, Typeable a) => KnownValue a

-- | Ensure given type does not contain "operation".
class (ForbidOp (ToT a), IsoValue a) => NoOperation a
instance (ForbidOp (ToT a), IsoValue a) => NoOperation a

class (ForbidContract (ToT a), IsoValue a) => NoContractType a
instance (ForbidContract (ToT a), IsoValue a) => NoContractType a

class (ForbidBigMap (ToT a), IsoValue a) => NoBigMap a
instance (ForbidBigMap (ToT a), IsoValue a) => NoBigMap a

class (HasNoNestedBigMaps (ToT a), IsoValue a) => CanHaveBigMap a
instance (HasNoNestedBigMaps (ToT a), IsoValue a) => CanHaveBigMap a

-- | Constraint applied to any part of a parameter type.
--
-- Use t'Lorentz.Constraints.Derivative.NiceParameterFull' instead
-- when you need to know the contract's entrypoints at compile-time.
type NiceParameter a = (ProperParameterBetterErrors (ToT a), KnownValue a)

type NiceStorage a = (ProperStorageBetterErrors (ToT a), KnownValue a)

type NiceStorageFull a = (NiceStorage a, HasAnnotation a)

type NiceConstant a = (ProperConstantBetterErrors (ToT a), KnownValue a)

type Dupable a = (ProperDupableBetterErrors (ToT a), KnownValue a)

type NicePackedValue a = (ProperPackedValBetterErrors (ToT a), KnownValue a)

type NiceUnpackedValue a = (ProperUnpackedValBetterErrors (ToT a), KnownValue a)

type NiceFullPackedValue a = (NicePackedValue a, NiceUnpackedValue a)

type NiceUntypedValue a = (ProperUntypedValBetterErrors (ToT a), KnownValue a)

type NiceViewable a = (ProperViewableBetterErrors (ToT a), KnownValue a)

-- | Constraint applied to any type, to check if Michelson representation (if exists) of this
-- type is Comparable. In case it is not prints human-readable error message
type NiceComparable n = (ProperNonComparableValBetterErrors (ToT n), KnownValue n, Comparable (ToT n))

type NiceNoBigMap n = (KnownValue n, HasNoBigMap (ToT n))