'''Agens移动控制组件
		
		Extra:
			jump()							基础的跳跃，可以往上跳跃
			stop_jump()						停止跳跃
			walL_jump()						墙跳
'''
class_name JumpLocomotionComponent extends LocomotionComponent

# <-- JUMP & FALL PROPOTIY -->
@export_category("Jump Properties")
##跳跃力度，在调用跳跃方法时自动处理为负，无需 * -1
@export var jump_force : float = 280
##跳跃极限时间，超过这个时间则无法继续监听跳跃输入
@export var jump_hold_maxium_time : float = .18
##跳跃时对移动输入的补正
@export var jump_horizontal_Boost : float = 80
##Jump时是否还需要受到重力影响
@export var jump_effected_by_gravity : bool = true
##半重力触发阈值，当速度小于这个数值时，会将角色的重力减半
@export var light_gravity_threshold: float = 80
##半重力乘量，默认.5
@export var light_gravity_mult: float = .5

@export_category("Wall Properties")
##如果apply，则在墙壁下滑时，会额外受到摩擦而保持wall slide speed
@export var apply_wall_slide_gravity: bool = true
##在墙壁下滑时的速度最大值
@export var wall_slide_fall_maxium_speed: float = 105
@export var wall_jump_base_force_x : float = 380
@export var wall_jump_base_force_y : float = -1

var _jump_timer : float
var _is_jumping : bool = false
var _is_wall_jumping: bool = false


##跳跃
func jump() -> bool:
	if _is_jumping : return false
	
	##如果是同方向的，则
	if sign(characterbody.velocity.x) * sign(_movement_input) > 0:
	#给与一个跳跃的补正速度
		characterbody.velocity.x += _movement_input * jump_horizontal_Boost  * .7
	else:
		characterbody.velocity.x = _movement_input * jump_horizontal_Boost # 跳跃的水平补正速度
	
	_jump_timer = jump_hold_maxium_time
	_is_jumping = true
	characterbody.velocity.y = _get_jump_force()
	
	return true

##停止跳跃，实际的功能是重置跳跃相关的标识符
func stop_jump() -> void:
	_is_jumping = false
	_is_wall_jumping = false

##墙跳
func wall_jump() -> void:
	if not characterbody.is_on_wall_only(): return
	
	characterbody.velocity.x = characterbody.get_wall_normal().x * wall_jump_base_force_x #基础的wall jump force
	characterbody.velocity.y = _get_jump_force()
	_jump_timer = jump_hold_maxium_time
	_is_jumping = true
	_is_wall_jumping = true

func _update_gravity(delta: float) -> void:
	if _jump_timer >= 0:
		if _is_jumping:
			characterbody.velocity.y = _get_jump_force()
			_jump_timer -= delta
			
			#如果不希望jump时受到重力影响，可以关闭此开关
			if not jump_effected_by_gravity: return
	
	super._update_gravity(delta)

##重写重力乘量函数
func _get_gravity_scale() -> float:
	var c = absf(characterbody.velocity.y) <= light_gravity_threshold && _is_jumping
	return light_gravity_mult if c else default_gravity_scale

##重写最大下落速度
func _get_max_fall_speed() -> float:
	var wall_normal_x = characterbody.get_wall_normal().x
	if -1 * sign(_movement_input) == wall_normal_x and characterbody.is_on_wall():
		return wall_slide_fall_maxium_speed
	else:
		return fall_maxium_speed

##设定jump的力度
func _get_jump_force() -> float:
	var result: float = jump_force
	if _is_wall_jumping and wall_jump_base_force_y > 0:
		result = wall_jump_base_force_y
	return -1.0 * result