# dungeon_state_test —— GC_DUNGEON 目的地状态回归。
#   godot --headless --path project --script dungeon_state_test.gd
extends SceneTree

const DungeonState = preload("res://dungeon_state.gd")

class FakeClient extends Node:
	signal dungeon_event(subheader: int, x: int, y: int, has_destination: bool)
	signal world_reset

var _fail := 0

func _ck(condition: bool, message: String) -> void:
	if not condition:
		_fail += 1
		printerr("FAIL: " + message)

func _init() -> void:
	await _run()
	if _fail == 0:
		print("PASS: dungeon_state_test (GC_DUNGEON destination / arrival / reset)")
		quit(0)
	else:
		printerr("%d check(s) failed" % _fail)
		quit(1)

func _run() -> void:
	MapCoord.set_base(Vector2.ZERO)
	var client := FakeClient.new()
	var player := Node3D.new()
	get_root().add_child(client)
	get_root().add_child(player)
	var state := DungeonState.new()
	get_root().add_child(state)
	state.setup(client, func() -> Node3D: return player)
	await process_frame
	var changes: Array = []
	var alarms: Array = []
	state.destination_changed.connect(func(active: bool, pos: Vector3): changes.append([active, pos]))
	state.alarm_requested.connect(func(pos: Vector3): alarms.append(pos))

	client.dungeon_event.emit(state.TIME_ATTACK_START, 0, 0, false)
	_ck(not state.active and state.last_subheader == state.TIME_ATTACK_START,
			"TIME_ATTACK_START is consumed without inventing a timer")
	client.dungeon_event.emit(state.DESTINATION_POSITION, 3210, 6540, true)
	_ck(state.active, "destination packet activates route")
	_ck(state.destination_cm == Vector2(3210, 6540), "destination keeps server cm")
	_ck(state.destination_world.distance_to(Vector3(32.1, 0.0, 65.4)) < 0.01,
			"destination converts global cm through MapCoord")
	_ck(changes.size() == 1 and changes[0][0] == true, "destination_changed opens target")
	_ck(alarms.size() == 1, "destination alarms immediately")

	# Reference uses Manhattan < 10000 cm, so exactly 100m is not complete and
	# 99m is complete. Keep the player in the same global coordinate frame.
	player.global_position = Vector3(32.1, 0.0, 65.4 - 100.0)
	state._process(0.0)
	_ck(state.active, "Manhattan distance exactly 100m remains active")
	player.global_position = Vector3(32.1, 0.0, 65.4 - 99.0)
	state._process(0.0)
	_ck(not state.active, "Manhattan distance below 100m completes route")
	_ck(changes.size() == 2 and changes[1][0] == false, "arrival closes target")

	client.dungeon_event.emit(state.DESTINATION_POSITION, 10000, 20000, true)
	_ck(state.active, "second destination reopens route")
	client.world_reset.emit()
	_ck(not state.active and state.destination_cm == Vector2.ZERO and changes.size() == 4,
			"world reset clears dungeon destination")

	client.queue_free()
	player.queue_free()
	state.queue_free()