// A guided tour of Wren running on calog. Wren reaches natives only through
// Calog.call(name, [args]), so print, crypto, and exit all go through it.
// Demonstrates: a class with a method, a List transformed with map, and the
// cryptoUuid / cryptoBase64Encode / calogPrint natives. Synchronous only.
// Run: bin/calog examples/scripts/languages/wren.wren

// A small class with a constructor and a method.
class Square {
  construct new(n) {
    _n = n
  }

  value { _n * _n }
}

// Build a List, then transform it with map (a Sequence) and materialize it.
var numbers = [1, 2, 3, 4, 5, 6]
var squares = numbers.map {|n| Square.new(n).value }.toList

// Reduce to a sum to show more of the List API.
var total = squares.reduce(0) {|acc, v| acc + v }

// Natives are reached via Calog.call(name, [args]).
Calog.call("calogPrint", ["squares 1..6 =", squares.join(", ")])
Calog.call("calogPrint", ["sum of squares =", total])

// A generated UUID, then base64-encoded through two more natives.
var id = Calog.call("cryptoUuid", [])
var encoded = Calog.call("cryptoBase64Encode", [id])
Calog.call("calogPrint", ["uuid    =", id])
Calog.call("calogPrint", ["base64  =", encoded])

// String interpolation works too; pass the finished string to the native.
Calog.call("calogPrint", ["Wren squared %(numbers.count) numbers, total %(total)."])

// Tear down and exit cleanly (required -- calog does not auto-exit).
Calog.call("calogExit", [0])