import LSpec
import Pantograph.Serial
import Pantograph.Environment
import Test.Common

namespace Pantograph.Test.Environment

open Pantograph
open Lean

deriving instance DecidableEq, Repr for Protocol.InductInfo
deriving instance DecidableEq, Repr for Protocol.ConstructorInfo
deriving instance DecidableEq, Repr for Protocol.RecursorInfo
deriving instance DecidableEq, Repr for Protocol.EnvInspectResult

def test_symbol_visibility (env: Environment): IO LSpec.TestSeq := do
  let entries: List (Name × Bool) := [
    ("Nat.add_comm".toName, false),
    ("Lean.Name".toName, true)
  ]
  let suite := entries.foldl (λ suites (symbol, target) =>
    let constant := env.constants.find! symbol
    let test := LSpec.check symbol.toString ((Environment.is_symbol_unsafe_or_internal symbol constant) == target)
    LSpec.TestSeq.append suites test) LSpec.TestSeq.done
  return suite

inductive ConstantCat where
  | induct (info: Protocol.InductInfo)
  | ctor (info: Protocol.ConstructorInfo)
  | recursor (info: Protocol.RecursorInfo)

def test_inspect (env: Environment): IO LSpec.TestSeq := do
  let testCases: List (String × ConstantCat) := [
    ("Or", ConstantCat.induct {
      numParams := 2,
      numIndices := 0,
      all := ["Or"],
      ctors := ["Or.inl", "Or.inr"],
    }),
    ("Except.ok", ConstantCat.ctor {
      induct := "Except",
      cidx := 1,
      numParams := 2,
      numFields := 1,
    }),
    ("Eq.rec", ConstantCat.recursor {
      all := ["Eq"],
      numParams := 2,
      numIndices := 1,
      numMotives := 1,
      numMinors := 1,
      k := true,
    }),
    ("ForM.rec", ConstantCat.recursor {
      all := ["ForM"],
      numParams := 3,
      numIndices := 0,
      numMotives := 1,
      numMinors := 1,
      k := false,
    })
  ]
  let inner: CoreM LSpec.TestSeq := do
    testCases.foldlM (λ acc (name, cat) => do
      let args: Protocol.EnvInspect := { name := name }
      let result ← match ← Environment.inspect args (options := {}) with
        | .ok result => pure $ result
        | .error e => panic! s!"Error: {e.desc}"
      let p := match cat with
        | .induct info => LSpec.test name (result.inductInfo? == .some info)
        | .ctor info => LSpec.test name (result.constructorInfo? == .some info)
        | .recursor info => LSpec.test name (result.recursorInfo? == .some info)
      return LSpec.TestSeq.append acc p
    ) LSpec.TestSeq.done
  runCoreMSeq env inner

def suite: IO LSpec.TestSeq := do
  let env: Environment ← importModules
    (imports := #["Init"].map (λ str => { module := str.toName, runtimeOnly := false }))
    (opts := {})
    (trustLevel := 1)

  return LSpec.group "Environment" $
    (LSpec.group "Symbol visibility" (← test_symbol_visibility env)) ++
    (LSpec.group "Inspect" (← test_inspect env))

end Pantograph.Test.Environment