# W6 —— 玩家 / NPC / 第三人称相机。SHINSOO §9-W6。
#   交互：godot --path project --script world_demo.gd -- --play
#     左键点地走过去 / 左键点 NPC 选中 · WASD 直接走 · 右键拖拽转视角 · 滚轮缩放 · Shift 跑
#   截图：默认（无 --play）跑脚本化「前进」并存 test/golden/world-a1-r2.png
extends SceneTree

const GameCamera = preload("res://game_camera.gd")
const PlayerCtl = preload("res://player_controller.gd")

var _world: Node
var _player: Node3D
var _model: Node3D
var _anim: Node
var _npc_anim: Node
var _npc: Node3D
var _cam: Camera3D
var _pc: Node                # PlayerController
var _target: Node3D          # 当前选中实体
var _anim_state := ""
var _audio: Node
var _assets := ""
var _t := 0.0
var _shot_mode := false
var _shot_done := false

func _init() -> void:
	_assets = AssetRoot.path()
	_shot_mode = "--play" not in OS.get_cmdline_user_args()  # 默认脚本化截图；`-- --play` 进交互

	_world = ClassDB.instantiate("Metin2World")
	_world.set("assets_root", _assets)
	_world.set("map_path", "OutdoorA1/metin2_map_a1")
	_world.set("auto_load", false)
	_world.set("load_radius_tiles", 1)   # W8: 3×3 流式
	_world.set("stream_budget", 3)
	get_root().add_child(_world)
	var ok: bool = _world.call("load_map")
	print("load ok=", ok, "  ", _world.call("get_load_report"))

	# 出生点：村庄一带（全局 cm）
	var spawn_cm := Vector3(45000.0, -38000.0, 17800.0)
	var gx := spawn_cm.x * 0.01
	var gz := -spawn_cm.y * 0.01
	var gy: float = _world.call("sample_height", gx, gz)
	_world.call("set_focus_position", gx, gz)  # 流式对准出生点

	_player = Node3D.new()
	_player.name = "Player"
	_player.position = Vector3(gx, gy, gz)
	get_root().add_child(_player)

	_model = ClassDB.instantiate("Metin2Model")
	_model.name = "Metin2Model"
	_model.set("texture_dir", _assets.path_join("PC/ymir work/pc/warrior"))
	_model.set("gr2_path", _assets.path_join("PC/ymir work/pc/warrior/warrior_cheongrin.gr2"))
	_model.set("hair_gr2", _assets.path_join("PC/ymir work/pc/warrior/hair/hair_1_1.gr2"))
	# SourceSkin(hair_1_1.dds) -> TargetSkin 换色（PARITY §2.4）
	_model.set("hair_skin", _assets.path_join("PC/ymir work/pc/warrior/warrior_hair_01_red.dds"))
	# 一手剑挂 equip_right_hand（PARITY §2.1；无物品系统，demo 写死）
	_model.set("weapon_gr2", _assets.path_join("item/ymir work/item/weapon/00040.gr2"))
	_player.add_child(_model)

	_audio = preload("res://audio.gd").new()
	get_root().add_child(_audio)
	_audio.setup(_assets)

	if ClassDB.class_exists("Metin2AnimPlayer"):
		_anim = ClassDB.instantiate("Metin2AnimPlayer")
		_anim.set("model_path", NodePath("../Metin2Model"))
		_anim.set("loop", true)
		_player.add_child(_anim)
		# .msa 动作事件里的声音（脚步 / 挥击等）-> 3D 定位播放
		_anim.connect("motion_event", func(_type, _effect, sound, _pos):
			if _audio and sound != "":
				_audio.play_at(sound, _model.global_position, _player))
	_set_anim("wait")

	_spawn_npc(Vector3(gx + 6.0, 0.0, gz + 4.0))

	var hud := preload("res://hud.gd").new()
	get_root().add_child(hud)
	hud.setup(_world, _player)

	_cam = GameCamera.new()
	_cam.target = _player
	_cam.world = _world
	get_root().add_child(_cam)
	_cam.make_current()

	_pc = PlayerCtl.new()
	_pc.player = _player
	_pc.camera = _cam
	_pc.world = _world
	_pc.force_run = _shot_mode
	get_root().add_child(_pc)
	_pc.anim_state.connect(_set_anim)
	_pc.moved.connect(func(p): _world.call("set_focus_position", p.x, p.z))

	# F5：后台暂停游戏树 + 停 BGM + 降帧；前台还原（截图模式下不挂，免打断脚本）
	if not _shot_mode:
		var life := preload("res://app_lifecycle.gd").new()
		get_root().add_child(life)
		life.bind(null, _audio)
	_pc.target_selected.connect(func(n):
		_target = n
		print("[target] ", n.name, " @ ", n.global_position))
	if _npc:
		_pc.pickables.append(_npc)

func _spawn_npc(pos: Vector3) -> void:
	var npc := Node3D.new()
	npc.name = "NPC"
	npc.position = Vector3(pos.x, _world.call("sample_height", pos.x, pos.z), pos.z)
	npc.rotation.y = PI
	get_root().add_child(npc)
	_npc = npc
	var m: Node3D = ClassDB.instantiate("Metin2Model")
	m.name = "Metin2Model"
	m.set("texture_dir", _assets.path_join("PC/ymir work/pc/shaman"))
	m.set("gr2_path", _assets.path_join("PC/ymir work/pc/shaman/shaman_lord.gr2"))
	npc.add_child(m)
	var tag := Label3D.new()
	tag.text = "村民"
	tag.position = Vector3(0, 2.2, 0)
	tag.billboard = BaseMaterial3D.BILLBOARD_ENABLED
	tag.no_depth_test = false
	tag.pixel_size = 0.012
	npc.add_child(tag)
	if ClassDB.class_exists("Metin2AnimPlayer"):
		_npc_anim = ClassDB.instantiate("Metin2AnimPlayer")
		_npc_anim.set("model_path", NodePath("../Metin2Model"))
		_npc_anim.set("loop", true)
		_npc_anim.set("anim_path", _assets.path_join("PC/ymir work/pc/shaman/general/wait.msa"))
		npc.add_child(_npc_anim)

func _set_anim(state: String) -> void:
	if state == _anim_state or _anim == null:
		return
	_anim_state = state
	var map := {"wait": "general/wait.msa", "walk": "general/walk.msa", "run": "general/run.msa"}
	var f: String = map[state]
	_anim.set("anim_path", _assets.path_join("PC/ymir work/pc/warrior/" + f))

func _process(dt: float) -> bool:
	_t += dt
	if int(_t * 2.0) != int((_t - dt) * 2.0):
		print("t=%.1f player=%s anim=%s perf=%s" % [_t, _player.position, _anim_state, _world.call("get_perf")])

	# 脚本化截图：走向一个前方点（展示点地移动 + 相机跟随），再选中 NPC
	if _shot_mode:
		if _t > 2.4 and _t < 2.5:
			var ahead := _player.position - _player.global_transform.basis.z * 60.0
			_pc.call("walk_to", Vector3(ahead.x, 0, ahead.z))
		if _t > 6.0 and _t < 6.1 and _npc:
			_pc.target_selected.emit(_npc)

	if _shot_mode and _t > 7.0 and not _shot_done:
		_shot_done = true
		var img := get_root().get_texture().get_image()
		var p := ProjectSettings.globalize_path("res://../test/golden/world-a1-r2.png")
		DirAccess.make_dir_recursive_absolute(p.get_base_dir())
		img.save_png(p)
		print("saved world-a1-r2.png ", img.get_size(), "  player=", _player.position,
			"  anim=", _anim_state, "  target=", (_target.name if _target else "none"))
		quit(0)
	return false

func _finalize() -> void:
	pass