# ports.ludic - what crafting asks the game: the pack, and the stations
# the pack. `leaves` is what an item leaves behind once used (water leaves its bottle), -1 nothing.
export port CraftPack {
  count: fn(int) -> int
  take: fn(int, int) -> bool
  add: fn(int, int) -> int
  room: fn(int) -> int = fn craft_no_limit
  leaves: fn(int) -> int = fn craft_leaves_nothing
}
function craft_no_limit(it: int) -> int { return 2147483647 }
function craft_leaves_nothing(it: int) -> int { return -1 }

# the stations. Unbound, there are none: only the hands are ready, and nothing can be started.
# `start(station, recipe)` puts a timed recipe in; false gives the makings back.
export port CraftStations {
  ready: fn(int) -> bool = fn craft_hands_only
  start: fn(int, int) -> bool = fn craft_no_start
}
function craft_hands_only(station: int) -> bool { return station == CRAFT_HANDS }
function craft_no_start(station: int, recipe: int) -> bool { return false }