extends SceneTree

# Forgejo #27: gas giants are deterministic animated gas sources, and the
# existing transporter route carries their gas without converting it to ore.

var game_state: Node
var stage: int = 0
var elapsed: float = 0.0


func _initialize() -> void:
	game_state = root.get_node("GameState")
	game_state.buildings.clear()
	game_state.extractors.clear()
	game_state.transporters.clear()
	game_state.gas = 0
	game_state.rocks = 0


func _process(delta: float) -> bool:
	elapsed += delta
	if stage == 0:
		var found_giant: bool = false
		for x in range(-12, 13):
			for y in range(-12, 13):
				var data: Dictionary = WorldGen.planet_data_at_chunk(Vector2i(x, y))
				if String(data.get("planet_type", "")) == "gas_giant":
					found_giant = String(data.get("resource_type", "")) == "gas"
					break
			if found_giant:
				break
		if not found_giant:
			return _fail("world generation produced no deterministic gas giant")
		var giant: Node2D = load("res://Planet.tscn").instantiate()
		giant.planet_type = "gas_giant"
		giant._process(0.5)
		if giant.gas_phase <= 0.0:
			return _fail("gas giant animation did not advance")
		giant.free()

		game_state.add_building(GameState.BUILDING_MOTHERSHIP, Vector2.ZERO)
		game_state.add_building(GameState.BUILDING_TRANSPORT_HUB, Vector2(100, 0))
		game_state.add_extractor("Aurelia", Vector2(400, 0), "gas")
		game_state.extractors[0].stock = game_state.transporter_load_limit()
		game_state.transporters.append({"hub_id": 2, "state": GameState.TRANSPORTER_TO_EXTRACTOR,
			"target_id": 0, "extractor_index": 0, "carrying": 0, "resource_type": "gas",
			"progress": 1.0, "from": Vector2(100, 0), "to": Vector2(400, 0)})
		game_state._arrive(game_state.transporters[0])
		if game_state.transporters[0].state != GameState.TRANSPORTER_TO_MOTHERSHIP_FROM_EXTRACTOR:
			return _fail("transporter did not collect gas from the extractor")
		game_state._arrive(game_state.transporters[0])
		if game_state.gas != game_state.transporter_load_limit() or game_state.rocks != 0:
			return _fail("gas delivery banked gas=%d ore=%d" % [game_state.gas, game_state.rocks])
		print("gas giant animated; transporter banked %d gas without creating ore" % game_state.gas)
		print("TEST_GAS_SYSTEM: PASS")
		quit(0)
		return true
	return false


func _fail(message: String) -> bool:
	print("TEST_GAS_SYSTEM: FAIL (%s)" % message)
	quit(1)
	return true