class_name Player extends CharacterBody2D

@onready var locomotion_comp: LocomotionComponent = %LocomotionComponent
@onready var hsm: LimboHSM = %PlayerHSM
@onready var wall_detector: WallDetector = %WallDetector
@onready var hit_box: Area2D = %HitBox
@onready var spawn_hook_comp: SpawnHookComponet = $SpawnHookComponet

@onready var foot_pos_marker: Marker2D = %FootPosMarker

enum Direction{LEFT,RIGHT}
var direction: Direction = Direction.RIGHT: set = _player_direction_changed

var m_jump_press: bool = false
var m_dash_press: bool = false
var m_climb_press: bool = false
var m_grap_hook_press: bool = false

##用于记录当前玩家输入的朝向
var m_input_intent_direction: Vector2

var is_dead: bool = false:
	set(value):
		is_dead = value
		if is_dead:
			locomotion_comp.is_active = false
			GlobalEvent.boradcast_player_dead_event()
			player_dead.emit()

signal player_direction_changed(direction: Direction)
signal player_dead

##落地尘土特效
signal v_land_dust
##奔跑尘土特效
signal v_run_dust
##跳跃尘土特效
signal v_jump_dust

##跳跃声音特效
signal s_jump_sound

func _ready() -> void:
	self.player_direction_changed.connect(_handle_direction_changed)
	self.hit_box.area_entered.connect(_handle_hit_box_entered)
	self.hit_box.body_entered.connect(_handle_hit_box_entered)

func _draw() -> void:
	draw_string(ThemeDB.fallback_font,Vector2.ZERO,str(get_wall_normal()))

func _process(delta: float) -> void:
	queue_redraw()

func _physics_process(delta: float) -> void:
	
	##用於更新輸入的朝向
	m_input_intent_direction = Input.get_vector(
		"move_left",
		"move_right",
		"move_up",
		"move_down"
	)
	
	spawn_hook_comp.set_ray_direction(m_input_intent_direction)

func _unhandled_input(event: InputEvent) -> void:
	if event.is_echo():
		return
	
	#jump input
	if event.is_action_pressed(&"jump"):
		m_jump_press = true
		_handle_jump_press()
	
	if event.is_action_released(&"jump"):
		m_jump_press = false
		_handle_jump_release()
	
	#dash input
	if event.is_action_pressed(&"dash"):
		m_dash_press = true
		_handle_dash_press()
	
	if event.is_action_released(&"dash"):
		m_dash_press = false
	
	#climb input
	if event.is_action_pressed(&"climb"):
		m_climb_press = true
		_handle_climb_press()
	
	if event.is_action_released(&"climb"):
		m_climb_press = false
		_handle_climb_release()
	
	#grap hook input
	if event.is_action_pressed(&"grap_hook"):
		m_grap_hook_press = true
		_handle_grap_hook_press()
	
	if event.is_action_released(&"grap_hook"):
		m_grap_hook_press = false
		_handle_grap_hook_release()

#region 输入处理
'''对于单次的输入触发动作，我们发送一个格式为
		want_to_...的事件给hsm，用来尝试触发
'''
##处理 jump 单次输入
func _handle_jump_press() -> void:
	if not m_jump_press:
		return
	
	hsm.dispatch(&"trigger_jump")

func _handle_jump_release() -> void:
	hsm.dispatch(&"completed_jump")

##处理 Dash 单次输入
func _handle_dash_press() -> void:
	if not m_dash_press:
		return
	hsm.dispatch(&"trigger_dash")

##处理 climb 输入
func _handle_climb_press() -> void:
	if not m_climb_press:
		return
	hsm.dispatch(&"trigger_climb")

func _handle_climb_release() -> void:
	hsm.dispatch(&"completed_climb")

##处理 Grap Hook 输入
func _handle_grap_hook_press() -> void:
	hsm.dispatch(&"trigger_grap_hook")

func _handle_grap_hook_release() -> void:
	hsm.dispatch(&"completed_grap_hook")
#endregion

##玩家方向改变时更新
func _handle_direction_changed(value: Direction):
	match value:
		Direction.RIGHT:
			wall_detector.flip_h = false
		Direction.LEFT:
			wall_detector.flip_h = true

func _handle_hit_box_entered(node: Node2D)-> void:
	hsm.dispatch(&"try_enter_dead")

func _player_direction_changed(value: Direction):
	if self.direction == value:
		return
	direction = value
	player_direction_changed.emit(direction)

##播放落地尘土特效
func on_land_dust() -> void:
	v_land_dust.emit({"world_pos": foot_pos_marker.global_position})

##播放落地尘土特效
func on_run_dust() -> void:
	v_run_dust.emit({"world_pos": foot_pos_marker.global_position})

##播放落地尘土特效
func on_jump() -> void:
	v_jump_dust.emit({"world_pos": foot_pos_marker.global_position})
	s_jump_sound.emit()

##工具函数
static func get_direction_vector(dir: Direction) -> Vector2:
	return Vector2(1,0) if dir == Direction.RIGHT else Vector2(-1,0)