class_name BattleSingleton extends Node
const BattleCutsceneAction = preload("res://battle/cutscene/BattleCutsceneAction.gd")

enum BattlePosition {
  LEFT_TOP_BACK,
  LEFT_TOP_FRONT,
  LEFT_MIDDLE_BACK,
  LEFT_MIDDLE_FRONT,
  LEFT_BOTTOM_BACK,
  LEFT_BOTTOM_FRONT,

  RIGHT_TOP_BACK,
  RIGHT_TOP_FRONT,
  RIGHT_MIDDLE_BACK,
  RIGHT_MIDDLE_FRONT,
  RIGHT_BOTTOM_BACK,
  RIGHT_BOTTOM_FRONT
}

# Battle State
var active:bool = false
var fighterMap:Dictionary[BattlePosition, BattleFighter] = {}
var battleCutscene:Cutscene = null

# Non-guarantees
var battleScene:BattleScene = null

# Signals
signal battleStarted
signal battleFightersChanged

func startBattle(params) -> void:
  assert(params.has('fighters'))
  assert(!active)

  # Get the cutscene (or create a default one).
  battleCutscene = params.get('cutscene', Cutscene.new())

  # Update fighters for each fighter scene.
  for pos in BattlePosition.values():
    var fighterOrNull = params['fighters'].get(pos, null)
    fighterMap[pos] = fighterOrNull

  # Initial cutscene elements. In future I may need to make this editable
  # somehow?
  for fighter:BattleFighter in params['fighters'].values():
    battleCutscene.addCallable(BattleCutsceneAction.getPlayerDecisionCallable(fighter))

  # Emit signals
  active = true
  battleStarted.emit()
  battleFightersChanged.emit()

  # Start running the battle cutscene.
  if !battleCutscene.running:
    battleCutscene.start()

  # Wait 3 seconds then simulate damage for testing
  var fighter = fighterMap[BattlePosition.RIGHT_TOP_FRONT]
  while true:
    await get_tree().create_timer(0.3).timeout
    fighter.damage(10, false)

func getFighterAtPosition(battlePos:BattlePosition) -> BattleFighter:
  return fighterMap.get(battlePos, null)