@tool
class_name Ground2D extends Node2D

@export var scene_name := ""
# 用于在 debug 时态下，指定进入的 portal
@export_enum("left", "right", "1", "2", "3", "4", "5", "6", "7", "8", "9")
var default_portal := "left"
@export_group("Player", "player_")
@export var player_y_fixed := true:
	set(val):
		player_y_fixed = val
		if is_node_ready():
			_reset_player_y()
@export var player_y := 70:
	set(val):
		player_y = val
		if is_node_ready():
			_reset_player_y()
@export var replace_player_to_portal := false:
	set(val):
		replace_player_to_portal = false
		if is_node_ready():
			move_player_to_portal(default_portal)
@export_group("Sound")
@export_enum("none", "ghost", "硬地面", "室外", "crawling", "盒子猫")
var footstep_type: String = "硬地面":
	set(val):
		footstep_type = val
		if is_node_ready():
			_load_footstep_audio()

# var main_scene := preload("res://scene/main.tscn") as PackedScene

@onready var player_line = %PlayerLine2D as Line2D
@onready var player = %MainPlayer as MainPlayer
@onready var directional_light := %DirectionalLight2D as DirectionalLight2D
@onready var bg_sprite = %BGSprite2D as Sprite2D
@onready var foreground = %ParallaxForeground as ParallaxBackground
@onready var camera_focus_marker = %CameraFocusMarker as CameraFocusMarker

@onready var footstep_audio = %FootstepAudioPlayer as RandomAudioStreamPlayer

const FOOTSTEP_AUDIO = {
	#"wood": preload("res://config/audio/footstep/footstep_wood.tres"),
	#"carpet": preload("res://config/audio/footstep/footstep_carpet.tres"),
	"concrete": preload("res://config/audio/footstep/footstep_concrete.tres"),
	#"grass": preload("res://config/audio/footstep/footstep_grass.tres"),
	#"snow": preload("res://config/audio/footstep/footstep_snow.tres"),
	"ghost": preload("res://config/audio/sfx/footstep_ghost.tres"),
	"硬地面": preload("res://config/audio/sfx/footstep_硬地面.tres"),
	"室外": preload("res://config/audio/sfx/footstep_室外.tres"),
	"crawling": preload("res://config/audio/sfx/footstep_crawling.tres"),
	# 待替换
	"盒子猫": preload("res://config/audio/footstep/footstep_concrete.tres"),
}

var restarting = false

func _enter_tree() -> void:
	# 仅在编辑器中调试时，通过 main 场景启动
	if GlobalConfig.DEBUG and (not Engine.is_editor_hint()) and (not get_parent() is GroundLoader):
		print("restarting...")
		restarting= true
		_restart_from_main()
		return
	if camera_focus_marker:
		camera_focus_marker.enabled = true

func _ready() -> void:
	if restarting:
		print("restarting: skip ground _ready()")
		return
	foreground.layer = GlobalConfig.CANVAS_LAYER_FG
	# 检查 scene_name 是否合法
	scene_name = scene_name.strip_edges()
	if get_parent().name.begins_with("S") and (not scene_name or scene_name.length() != 7):
		printerr("scene_name is not valid")
	if Engine.is_editor_hint():
		return
	# 隐藏 player_line
	player_line.visible = false
	_set_camera_and_player_boundary()
	_load_footstep_audio()
	# marker 默认就在 foucs player 状态
	# camera_focus_marker.focus_node(player)
	# %ColorRectTop.visible = true
	# %ColorRectBottom.visible = true
	# 如果 debug 模式下不通过 GroundLoader 启动，则插入到 main 以下
	_setup_player_light()


func _restart_from_main():
	# _enter_tree, wait for ready
	await ready
	if not ArchiveManager.archive:
		ArchiveManager.load_archive()
	if not GlobalConfigManager.config:
		ArchiveManager.load_config()
	ArchiveManager.archive.current_scene = scene_name
	ArchiveManager.archive.entrance_portal = default_portal
	# get_tree().change_scene_to_packed.call_deferred(main_scene)
	get_tree().change_scene_to_file.call_deferred("res://scene/main.tscn")


func _reset_player_y():
	# 从屏幕下边缘算起
	if player_y_fixed:
		player.set_y_from_ground(158.0 - player_y)


func _set_camera_and_player_boundary():
	# set current_boarder by bg size
	var camera_rect = Rect2(0, -158, 564, 316)
	var player_rect = Rect2(0, -158, 564, 316)
	if bg_sprite.texture and not Engine.is_editor_hint():
		var size = bg_sprite.texture.get_size() * bg_sprite.scale
		# camera rect
		var camera_size = size
		camera_size.x += bg_sprite.position.x
		camera_size = Vector2(max(564.0, camera_size.x), max(camera_size.y, 316.0))
		var camera_upleft = Vector2(0, -camera_size.y / 2.0)
		camera_rect = Rect2(camera_upleft, camera_size)
	# player rect should be set centered, with 30px x padding
	player_rect.position.x = player_line.get_point_position(0).x + player_line.global_position.x
	player_rect.size.x = player_line.get_point_position(1).x - player_line.get_point_position(0).x
	SceneManager.set_camera_boundary(camera_rect)
	SceneManager.set_player_boundary(player_rect)
	if GlobalConfig.DEBUG:
		print("_set_camera_and_player_boundary:", camera_rect, player_rect)


func _load_footstep_audio():
	# foot step sound
	footstep_audio.audio_collections.clear()
	if footstep_type != "none":
		var audio = FOOTSTEP_AUDIO[footstep_type] as AudioStreamCollection
		footstep_audio.audio_collections.append(audio)


func play_footstep_sound() -> void:
	if not footstep_audio.audio_collections.is_empty():
		footstep_audio.play_random()


func move_player_to_portal(portal_name: String) -> void:
	var node_path = NodePath("DeployLayer/portal_" + portal_name) 
	var portal_node = get_node_or_null(node_path) as Portal2D
	if portal_node and player:
		player.global_position.x = portal_node.global_position.x
		if portal_name == "left":
			player.set_facing_direction(Vector2.RIGHT)
		elif portal_name == "right":
			player.set_facing_direction(Vector2.LEFT)
		_reset_player_y()
		if GlobalConfig.DEBUG:
			print("move player to portal:", portal_name, portal_node.global_position)
	elif player:
		printerr(scene_name, " portal not found: ", node_path)
	else:
		printerr("move_player_to_portal player not ready")
	# 传送后，重置 camera 位置
	camera_focus_marker.reset_position_immediately()

func _setup_player_light():
	# 强制显示 directional_light
	directional_light.visible = true
	# 设置角色身上光源
	if directional_light.blend_mode == Light2D.BLEND_MODE_SUB and directional_light.energy > 0.6:
		player.enable_light = true
	else:
		player.enable_light = false
	print("_setup_player_light player.enable_light=", player.enable_light)