package tf.bug.fancade

object Main {

  def main(args: Array[String]): Unit = {
    import Fanscript._
    import tf.bug.shinji.syntax.all._
    // min, max, start, result, after -> end, index, sum, before
    val sum: (Number × Number × Pull × Number × Pull) → (Pull × Number × Number × Pull) = {
      val getSum: T → Number = Builtin.GetNumber("Sum")
      val setSum: (Number × Pull) → Pull = Builtin.SetNumber("Sum")
      val addToSum: (Number × Pull) → Pull = {
        val add: (Number × Number) → Number = Builtin.AddNumbers
        val sumAsFirstInput: (T × Number) → (Number × Number) = getSum.first[Number]
        val branch: Number → (T × Number) = deunitL(fanscript)
        val justSecondInput: Number → (Number × Number) = branch >>> sumAsFirstInput
        val addSum: Number → Number = add.ldimap(justSecondInput)
        val storeSum: (Number × Pull) → Pull = setSum
        storeSum.ldimap(fanscript.lbimap(addSum))
      }

      val getIndex: T → Number = Builtin.GetNumber("Index")
      val setIndex: (Number × Pull) → Pull = Builtin.SetNumber("Index")
      val indexGreaterThan: Number → Bool = {
        val greaterThan: (Number × Number) → Bool = Builtin.GreaterThan
        val indexAsFirstInput: (T × Number) → (Number × Number) = getIndex.first[Number]
        val branch: Number → (T × Number) = deunitL(fanscript)
        val comparisonAsSecondInput: Number → (Number × Number) = branch >>> indexAsFirstInput
        comparisonAsSecondInput >>> greaterThan
      }
      val indexNotGreaterThan: Number → Bool = indexGreaterThan >>> Builtin.Not
      val checkContinue: (Number × Pull × Pull × Pull) → Pull = {
        val ifBlock: (Bool × Pull × Pull × Pull) → Pull = Builtin.If
        val checkGreater: (Number × Pull × Pull × Pull) → (Bool × Pull × Pull × Pull) = {
          val one: (Number × Pull) → (Bool × Pull) = indexGreaterThan.first[Pull]
          val two: (Number × Pull × Pull) → (Bool × Pull × Pull) = fanscript.first(one)
          val three: (Number × Pull × Pull × Pull) → (Bool × Pull × Pull × Pull) = fanscript.first(two)
          three
        }
        fanscript.andThen(checkGreater, ifBlock)
      }

      // sumToIndex -> before
      val initializeSum: Pull → Pull = {
        val zero: T → Number = Builtin.NumberValue(0.0F)
        val zeroAsInput: (T × Pull) → (Number × Pull) = zero.first[Pull]
        val branch: Pull → (T × Pull) = fanscript.deunitorLeft[Pull]
        branch >>> zeroAsInput >>> setSum
      }

      // min, indexToLoopStart -> sumToIndex
      val initializeIndex: (Number × Pull) → Pull = setIndex

      // max, start, ◌, after -> (indexToLoopStart + incrementToLoop)
      val startLoop: (Number × Pull × Pull × Pull) → Pull = checkContinue

      // result, increaseSum -> end
      val increaseSum: (Number × Pull) → Pull = addToSum

      // incrementToLoop -> increaseSum
      val incrementIndex: Pull → Pull = {
        val get: T → Number = getIndex
        val set: (Number × Pull) → Pull = setIndex
        val one: T → Number = Builtin.NumberValue(1.0F)
        val additionOperands: T → (Number × Number) = get &&& one
        val add: T → Number = additionOperands >>> Builtin.AddNumbers
        val carryPull: (T × Pull) → (Number × Pull) = add.first[Pull]
        val branch: Pull → (T × Pull) = fanscript.deunitorLeft[Pull]
        branch >>> carryPull >>> set
      }

      // min, indexToLoopStart -> before
      val initialize: (Number × Pull) → Pull = initializeIndex >>> initializeSum

      // result, incrementToLoop -> end
      val postLoop: (Number × Pull) → Pull = {
        val carryResult = fanscript.second[Pull, Pull, Number](incrementIndex)
        fanscript.andThen(carryResult, increaseSum)
      }

      // max, start, after -> (indexToLoopStart + incrementToLoop)
      val condition: (Number × Pull × Pull) → Pull = {
        val zThree: (Number × Pull) → (Number × Pull × Pull) =
          fanscript.andThen(fanscript.deunitorRight, fanscript.rbimap(Z))
        val zFour: (Number × Pull × Pull) → (Number × Pull × Pull × Pull) =
          fanscript.lbimap(zThree)
        fanscript.ldimap(zFour)(checkContinue)
      }

      // min, max, start, result, after -> end, index, sum, before
      val result: (Number × Number × Pull × Number × Pull) → (Pull × Number × Number × Pull) = {
        // max, start, after -> indexToLoopStart, incrementToLoop
        val duplicateCondition: (Number × Pull × Pull) → (Pull × Pull) =
          fanscript.andThen(condition, fanscript.duplicate)

        // min, indexToLoopStart, result, incrementToLoop -> before, end
        val conditionPrecursors: (Number × Pull × Number × Pull) → (Pull × Pull) =
          fanscript.andThen(fanscript.associateRight[Number × Pull, Number, Pull], fanscript.split[Number × Pull, Pull, Number × Pull, Pull](initialize, postLoop))

        // min, result, (indexToLoopStart, incrementToLoop) -> end, before
        val orientConditionPrecursors: ((Number × Number) × (Pull × Pull)) → (Pull × Pull) = {
          val flattenAssoc: ((Number × Number) × (Pull × Pull)) → (((Number × Number) × Pull) × Pull) = fanscript.associateLeft
          val assocInside: (((Number × Number) × Pull) × Pull) → ((Number × (Number × Pull)) × Pull) = fanscript.lbimap(fanscript.associateRight)
          val swapInside: ((Number × (Number × Pull)) × Pull) → ((Number × (Pull × Number)) × Pull) = fanscript.lbimap(fanscript.rbimap(fanscript.swap))
          val reassocInside: ((Number × (Pull × Number)) × Pull) → (((Number × Pull) × Number) × Pull) = fanscript.lbimap(fanscript.associateLeft)
          val orientConditionInputs: ((Number × Number) × (Pull × Pull)) → (((Number × Pull) × Number) × Pull) =
            fanscript.andThen(fanscript.andThen(fanscript.andThen(flattenAssoc, assocInside), swapInside), reassocInside)

          val swapEnd: (Pull × Pull) → (Pull × Pull) = fanscript.swap

          fanscript.dimap(orientConditionInputs, swapEnd)(conditionPrecursors)
        }

        // min, max, start, result, after -> end, before
        val nonNumbers: (Number × Number × Pull × Number × Pull) → (Pull × Pull) = {
          val duplicateConditionLeftNumbers: ((Number × Number) × (Number × Pull × Pull)) → ((Number × Number) × (Pull × Pull)) =
            fanscript.second[Number × Pull × Pull, Pull × Pull, Number × Number](duplicateCondition)

          // (min, result), (max, start, after) -> end, before
          val aggregate: ((Number × Number) × (Number × Pull × Pull)) → (Pull × Pull) =
            fanscript.andThen(duplicateConditionLeftNumbers, orientConditionPrecursors)

          // (max, start, after, (min, result)) -> end, before
          val align: (Number × Pull × Pull × (Number × Number)) → (Pull × Pull) =
            fanscript.andThen(fanscript.swap, aggregate)

          // max, start, after, min, result -> end, before
          val assoc: (Number × Pull × Pull × Number × Number) → (Pull × Pull) =
            fanscript.andThen(fanscript.associateRight, align)

          // min, max, start, result, after -> max, start, after, min, result
          val realign: ((((Number × Number) × Pull) × Number) × Pull) → ((((Number × Pull) × Pull) × Number) × Number) = {
            val one: ((((Number × Number) × Pull) × Number) × Pull) → (((Number × (Number × Pull)) × Number) × Pull) =
              fanscript.lbimap(fanscript.lbimap(fanscript.associateRight))
            val two: (((Number × (Number × Pull)) × Number) × Pull) → ((((Number × Pull) × Number) × Number) × Pull) =
              fanscript.lbimap(fanscript.lbimap(fanscript.swap))
            val three: ((((Number × Pull) × Number) × Number) × Pull) → (((Number × Pull) × Number) × (Number × Pull)) =
              fanscript.associateRight
            val four: (((Number × Pull) × Number) × (Number × Pull)) → (((Number × Pull) × Number) × (Pull × Number)) =
              fanscript.rbimap(fanscript.swap)
            val five: (((Number × Pull) × Number) × (Pull × Number)) → ((((Number × Pull) × Number) × Pull) × Number) =
              fanscript.associateLeft
            val six: ((((Number × Pull) × Number) × Pull) × Number) → (((Number × Pull) × (Number × Pull)) × Number) =
              fanscript.lbimap(fanscript.associateRight)
            val seven: (((Number × Pull) × (Number × Pull)) × Number) → (((Number × Pull) × (Pull × Number)) × Number) =
              fanscript.lbimap(fanscript.rbimap(fanscript.swap))
            val eight: (((Number × Pull) × (Pull × Number)) × Number) → ((((Number × Pull) × Pull) × Number) × Number) =
              fanscript.lbimap(fanscript.associateLeft)

            fanscript.andThen(
              fanscript.andThen(
                fanscript.andThen(
                  fanscript.andThen(
                    fanscript.andThen(
                      fanscript.andThen(
                        fanscript.andThen(
                          one,
                          two
                        ),
                        three
                      ),
                      four
                    ),
                    five
                  ),
                  six
                ),
                seven
              ),
              eight
            )
          }

          fanscript.andThen(realign, assoc)
        }

        // end, before -> end, index, sum, before
        val addOutputs: (Pull × Pull) → (Pull × Number × Number × Pull) =
          fanscript.lbimap(fanscript.andThen(
            fanscript.andThen[Pull, Pull × T, Pull × Number](fanscript.deunitorRight[Pull], fanscript.rbimap(getIndex)),
            fanscript.andThen[Pull × Number, Pull × Number × T, Pull × Number × Number](fanscript.deunitorRight[Pull × Number], fanscript.rbimap(getSum))
          ))

        fanscript.andThen(nonNumbers, addOutputs)
      }

      result
    }

    pprint.pprintln(sum)
  }

}