# net_world_push_test —— CLIENT-GAP §3.7 受击击退的场景侧：
#   __PushCircle + IncreaseExternalForce -> net_world.push_victim
#   CActorInstance::PhysicsProcess（每帧 AddMovement(GetX/YMovement)）-> 节点偏移
#   GetBlendingPosition（blending 中 = 当前位置 + LastPosition）-> OnHit 的 CG_SYNC_POSITION 坐标
#   godot --headless --path project --script net_world_push_test.gd
extends SceneTree

const NetWorld = preload("res://net_world.gd")
const PhysicsPush = preload("res://physics_push.gd")

class FakeClient extends Node:
	signal entity_spawned(entity: Dictionary)
	signal entity_despawned(vid: int)
	signal entity_moved(vid: int)
	signal entity_main_set(vid: int)
	signal entity_info(vid: int, entity: Dictionary)
	signal chat(type: int, vid: int, text: String)
	signal vitals_changed(vid: int)
	signal entity_dead(vid: int)
	signal damage(vid: int, amount: int, flag: int)
	var ents := {}
	func get_entity(vid: int) -> Dictionary: return ents.get(vid, {})
	func get_entities() -> Array: return ents.values()
	func get_pvp_relations() -> Array: return []
	func get_duel() -> Dictionary: return {}
	func add(vid: int, cm: Vector2, extra := {}) -> Dictionary:
		var d := {"vid": vid, "name": "e%d" % vid, "is_main": false,
			"func": 0, "moving": false, "angle_deg": 0.0,
			"hp": 100, "max_hp": 100, "dead": false, "race": 0,
			"affect_flags": 0, "parts": [0, 0, 0, 0]}
		d.merge(extra, true)
		ents[vid] = d
		place(vid, cm)
		return d
	func place(vid: int, cm: Vector2) -> void:
		ents[vid]["pos"] = Vector3(cm.x * 0.01, 0.0, -cm.y * 0.01)
		ents[vid]["pos_cm"] = Vector3(cm.x, cm.y, 0.0)

var _fail := 0
func _ck(c: bool, m: String) -> void:
	if not c:
		_fail += 1
		printerr("FAIL: " + m)

var _done := false

func _init() -> void:
	await _run()
	_ck(_done, "test body ran to completion (a SCRIPT ERROR aborted _run)")
	if _fail == 0:
		print("PASS: net_world_push_test (push_victim / PhysicsProcess offset / GetBlendingPosition)")
		quit(0)
	else:
		printerr("%d check(s) failed" % _fail)
		quit(1)

func _off(v: Vector2) -> Vector3:
	return Vector3(v.x / 100.0, 0.0, -v.y / 100.0)

func _run() -> void:
	var mount := Node3D.new()
	get_root().add_child(mount)
	var fc := FakeClient.new()
	get_root().add_child(fc)
	var nw: Node = NetWorld.new()
	get_root().add_child(nw)
	nw.setup(fc, mount)

	fc.add(1, Vector2.ZERO, {"is_main": true})
	fc.entity_main_set.emit(1)
	fc.entity_spawned.emit(fc.add(2, Vector2(300, 0)))
	await process_frame
	nw._process(0.02)
	var n: Node3D = nw.node_for(2)
	_ck(n != null, "victim node spawned")
	if n == null:
		return
	_ck(not nw.is_pushing(2), "no push -> not pushing")
	_ck(nw.blending_position(2).is_equal_approx(n.global_position), "not blending -> GetBlendingPosition = current position")

	# 攻击者在西边：victim - attacker = actor-world (+1, 0)
	nw.push_victim(2, Vector2(1, 0), 3.0)
	var ref := PhysicsPush.new()
	ref.set_direction(Vector2(1, 0))
	ref.increase_external_force(3.0)
	var last := ref.get_last_position()
	_ck(last.x > 0.0, "reference push has a positive displacement")
	_ck(nw.is_pushing(2), "push_victim -> is_pushing")
	_ck(nw.blending_position(2).is_equal_approx(n.global_position + _off(last)),
			"blending -> GetBlendingPosition = current + LastPosition, got %s" % nw.blending_position(2))

	var acc := Vector2.ZERO
	for i in 60:
		nw._process(0.02)
		ref.update(0.02)
		acc += ref.get_movement()
	var want: Vector3 = nw._grounded(fc.ents[2]["pos"]) + _off(acc)
	_ck(acc.x > 0.0 and n.position.is_equal_approx(want),
			"PhysicsProcess: node follows the accumulated ease-out movement, got %s want %s" % [n.position, want])

	# blending 中服务器位置变化：偏移叠在新位置上（位移还在进行）
	fc.place(2, Vector2(300, 50))
	nw._process(0.02)
	ref.update(0.02)
	acc += ref.get_movement()
	want = nw._grounded(fc.ents[2]["pos"]) + _off(acc)
	_ck(n.position.is_equal_approx(want), "server move while blending -> offset kept on top, got %s want %s" % [n.position, want])

	for i in 100:
		nw._process(0.02)
		ref.update(0.02)
		acc += ref.get_movement()
	_ck(not nw.is_pushing(2), "blend over -> not pushing")
	want = nw._grounded(fc.ents[2]["pos"]) + _off(acc)
	_ck(n.position.is_equal_approx(want), "blend over -> actor stays where the push left it, got %s want %s" % [n.position, want])

	# blend 结束后服务器位置再变：以服务器位置为准（丢弃本地击退偏移）
	fc.place(2, Vector2(320, 50))
	nw._process(0.02)
	_ck(n.position.is_equal_approx(nw._grounded(fc.ents[2]["pos"])), "server position after the blend supersedes the push offset")

	nw.push_victim(2, Vector2(0, 1), 3.0)
	fc.entity_despawned.emit(2)
	_ck(not nw.is_pushing(2) and not nw._push.has(2), "despawn drops the push state")
	_done = true