extends GdUnitTestSuite

## NEO-97: windup interpolation between npc-runtime polls.

const NpcRuntimeHudState := preload("res://scripts/npc_runtime_hud_state.gd")


static func _telegraph_snapshot(remaining: float) -> Dictionary:
	return {
		"npcInstances":
		[
			{
				"npcInstanceId": "prototype_npc_elite",
				"state": "telegraph_windup",
				"activeTelegraph":
				{
					"telegraphId": "prototype_elite_slam",
					"windupRemainingSeconds": remaining,
					"archetypeKind": "elite",
				},
			}
		]
	}


func test_display_windup_remaining_decreases_over_time() -> void:
	# Arrange
	var state: RefCounted = NpcRuntimeHudState.new()
	state.call("apply_snapshot", _telegraph_snapshot(2.0))
	var first: float = float(state.call("display_windup_remaining", "prototype_npc_elite"))
	# Act
	for _i in 3:
		await get_tree().process_frame
	await (Engine.get_main_loop() as SceneTree).create_timer(0.1).timeout
	var second: float = float(state.call("display_windup_remaining", "prototype_npc_elite"))
	# Assert
	assert_that(second).is_less(first)
	assert_that(second).is_greater(1.85)


func test_new_snapshot_reconciles_windup_anchor() -> void:
	# Arrange
	var state: RefCounted = NpcRuntimeHudState.new()
	state.call("apply_snapshot", _telegraph_snapshot(2.5))
	await (Engine.get_main_loop() as SceneTree).create_timer(0.05).timeout
	# Act
	state.call("apply_snapshot", _telegraph_snapshot(1.8))
	var remaining: float = float(state.call("display_windup_remaining", "prototype_npc_elite"))
	# Assert
	assert_that(remaining).is_less_equal(1.81)
	assert_that(remaining).is_greater_equal(1.79)