extends SceneTree

const NetWorld = preload("res://net_world.gd")
const GroundItems = preload("res://ui/ground_items.gd")
const PlayerController = preload("res://player_controller.gd")

class MockClient extends Node:
	signal entity_spawned(e: Dictionary)
	signal entity_despawned(vid: int)
	signal entity_dead(vid: int)
	signal entity_moved(vid: int)
	signal entity_main_set(vid: int)
	signal vitals_updated(vid: int)
	signal vitals_changed(vid: int)
	signal warp_requested(x: float, y: float)
	signal ground_item_added(item: Dictionary)
	signal ground_item_removed(vid: int)
	signal chat(mode: int, text: String)
	signal chat_bubble(vid: int, text: String)
	signal damage(target_vid: int, attacker_vid: int, damage_val: int, flag: int)
	signal whisper_received(author: String, text: String)

	var _main_vid := 1
	var picked_vids: Array[int] = []

	func get_main_vid() -> int:
		return _main_vid

	func get_entity(vid: int) -> Dictionary:
		return {"vid": vid, "pos": Vector3.ZERO, "race": 101, "name": "Wild Dog", "hp": 100, "max_hp": 100}

	func get_ground_items() -> Array:
		return []

	func pickup_item(vid: int) -> bool:
		picked_vids.append(vid)
		return true

class MockWorld extends Node:
	func sample_height(x: float, z: float) -> float:
		return 5.5

func _init() -> void:
	print("--- Running mob_death_drop_test ---")
	test_mob_death_and_despawn()
	test_player_controller_ignores_dead()
	test_ground_items_coordinate_mapping()
	print("mob_death_drop_test passed with 0 failures!")
	quit(0)

func test_mob_death_and_despawn() -> void:
	var client = MockClient.new()
	var mount = Node3D.new()
	root.add_child(mount)

	var net_world = NetWorld.new()
	root.add_child(net_world)
	net_world.setup(client, mount)

	# Spawn a mob with tags
	var mob_vid := 100
	var mob_node := Node3D.new()
	mob_node.name = "entity_%d" % mob_vid
	var name_tag := Label3D.new()
	name_tag.name = "NameTag"
	name_tag.text = "Wild Dog"
	mob_node.add_child(name_tag)
	var shadow := Decal.new()
	shadow.name = "Shadow"
	mob_node.add_child(shadow)
	mount.add_child(mob_node)

	net_world._by_vid[mob_vid] = mob_node
	net_world._make_hp_bar(mob_vid, {"hp": 100, "max_hp": 100, "name": "Wild Dog"})
	net_world.set_target_vid(mob_vid)
	net_world.set_hover_vid(mob_vid)

	assert(net_world._hp_bars.has(mob_vid), "HP bar should exist initially")
	assert(net_world._target_vid == mob_vid, "Target should be mob_vid")
	assert(net_world._hover_vid == mob_vid, "Hover should be mob_vid")
	assert(name_tag.visible == true, "NameTag should be visible initially")

	# Trigger death
	net_world._on_dead(mob_vid)

	assert(not net_world._hp_bars.has(mob_vid), "HP bar should be removed immediately on death")
	assert(name_tag.visible == false, "NameTag should be detached/hidden on death")
	assert(shadow.visible == false, "Shadow should be hidden on death")
	assert(bool(mob_node.get_meta("dead", false)) == true, "Mob should have dead meta")
	assert(net_world._target_vid == 0, "Target should be cleared on death")
	assert(net_world._hover_vid == 0, "Hover should be cleared on death")

	# Trigger despawn
	net_world._on_despawn(mob_vid)
	assert(not net_world._by_vid.has(mob_vid), "Mob should be erased from _by_vid on despawn")
	print("OK: Mob death detach & despawn lifecycle verified")

	net_world.queue_free()
	mount.queue_free()
	client.queue_free()

func test_player_controller_ignores_dead() -> void:
	var pc = PlayerController.new()
	var player = Node3D.new()
	player.position = Vector3(0, 0, 0)
	root.add_child(player)
	pc.player = player

	var dead_mob = Node3D.new()
	dead_mob.position = Vector3(0, 0, 2)
	dead_mob.set_meta("dead", true)
	root.add_child(dead_mob)

	pc.pickables.clear()
	pc.pickables.append(dead_mob)

	# Test collision check (line 317)
	var blocked: bool = pc._actor_blocked(Vector3(0, 0, 1.8))
	assert(not blocked, "Dead mob should not block player movement")

	print("OK: PlayerController ignores dead mobs for collision and picking")
	pc.queue_free()
	player.queue_free()
	dead_mob.queue_free()

func test_ground_items_coordinate_mapping() -> void:
	# Set map base position (e.g. Map 1: 400000 cm X, 300000 cm Y)
	MapCoord.set_base(Vector2(400000, 300000))

	var client = MockClient.new()
	var mount = Node3D.new()
	root.add_child(mount)

	var world = MockWorld.new()
	root.add_child(world)

	var player = Node3D.new()
	player.position = Vector3(100, 5.5, 200) # Player is at world (100, 5.5, 200)
	root.add_child(player)

	var gi = GroundItems.new()
	root.add_child(gi)

	gi.setup(client, mount, func() -> Node: return player, null, null,
			Callable(), "", func() -> Node: return world)

	# Net position from server:
	# Metin2 global: X = 410000 cm, Y = 320000 cm (local world should be: X = 100m, Z = 200m)
	# M2Client position_to_godot produces:
	# net.x = 4100.0, net.y = 0.0, net.z = -3200.0
	var net_drop_pos := Vector3(4100.0, 0.0, -3200.0)
	var drop_vid := 9999
	var drop_dict := {
		"vid": drop_vid,
		"vnum": 1, # Yang / Gold
		"owner": "Hero",
		"pos": net_drop_pos
	}

	gi._on_added(drop_dict)

	assert(gi._by_vid.has(drop_vid), "Ground item should be registered in _by_vid")
	var drop_node: Node3D = gi._by_vid[drop_vid]
	assert(drop_node != null, "Drop node should exist")

	# Check world coordinate translation
	assert(is_equal_approx(drop_node.position.x, 100.0), "X should be translated to 100m")
	assert(is_equal_approx(drop_node.position.z, 200.0), "Z should be translated to 200m")
	# Check terrain height snapping (+0.1m above 5.5m = 5.6m)
	assert(is_equal_approx(drop_node.position.y, 5.6), "Y should be snapped to terrain height + 0.1m")

	# Check item name for vnum 1
	var tag := drop_node.get_node("tag") as Label3D
	assert(tag != null and tag.text == "Yang", "Vnum 1 name should be Yang")

	# Test pickup with player near (distance = 0.1m < PICKUP_RANGE 3.0m)
	var picked_vid := gi.try_pickup()
	assert(picked_vid == drop_vid, "try_pickup should pick nearby item")
	assert(client.picked_vids.has(drop_vid), "client.pickup_item should be called")

	# Test remove
	gi._on_removed(drop_vid)
	assert(not gi._by_vid.has(drop_vid), "Item should be removed from _by_vid")

	print("OK: Ground items coordinate mapping, height snapping, Yang naming, and pickup verified")

	# Reset MapCoord base
	MapCoord.set_base(Vector2.ZERO)

	gi.queue_free()
	world.queue_free()
	player.queue_free()
	mount.queue_free()
	client.queue_free()