extends CharacterBody2D
var HP = 30
var target : Node2D
var target_two : Node2D
var Player_inside: bool = false
var slow_timer: float = 0.0 
var slow_factor: float = 0.5 
var is_hurt = false
var is_dead: bool = false
const SPEED = 150.0
const JUMP_VELOCITY = -250.0
@onready var TIMEJUMP = $timeJUMP
@onready var animated_sprite = $AnimatedSprite2D
func _ready() -> void:
	add_to_group("enemy")
	
func die():
	HP = max(0,HP)
	if HP <= 0:
		queue_free()
		is_dead = true
		
	
func take_damage(amount:int,slow_during:float = 0.0,factor:float = 0.5):
	if is_dead:
		return
	HP -= amount                       #伤害
	animated_sprite.play("HIT")
	is_hurt = true
	if slow_during > 0.0:
		slow_timer = max(slow_during,slow_timer)
		slow_factor = factor
	animated_sprite.play("HIT")
	if not is_dead:
		die()
		await get_tree().create_timer(0.3).timeout
		is_hurt = false

func _physics_process(delta: float) -> void:
	var current_SPEED = SPEED
	if not is_on_floor():
		velocity += get_gravity() * delta
	if Player_inside and is_instance_valid(target_two):
		if target_two.has_method("take_damage"):
			target_two.take_damage(1)
			Player_inside = false
	if slow_timer > 0.0:
		slow_timer -= delta
		if slow_timer < 0.0:
			slow_timer = 0.0
	if slow_timer > 0.0:
		current_SPEED = SPEED * slow_factor
	
	if target:
		var direction := signf(target.global_position.x - global_position.x)
		velocity.x = direction * SPEED
		if direction < 0:
			animated_sprite.flip_h = true
		elif direction > 0:
			animated_sprite.flip_h = false
		if direction != 0 :
			velocity.x = current_SPEED * direction
			if animated_sprite.animation != "RUN" and not is_hurt:
				animated_sprite.play("RUN")
		if is_on_floor() and TIMEJUMP.is_stopped():
			velocity.y = JUMP_VELOCITY
			TIMEJUMP.start()
	elif is_on_floor():
		velocity.x = 0
		if not is_hurt:
			animated_sprite.play("IDLE")
	move_and_slide()


func _on_jiance_body_entered(body: Node2D) -> void:
	if body.is_in_group("Player"):
		target = body
		
	


func _on_damage_body_entered(body: Node2D) -> void:
	if body.is_in_group("Player"):
		target_two = body
		Player_inside = true