extends CharacterBody2D
class_name Unit
#这里暂时使用中文键debug，方便调试，后会更改
var action_emoji:Dictionary={
	"生气":"🤯",
	"愤怒":"🤬",
	"指责":"👈🤯",
	"伤害":"😡🔪",
	"友好":"🥰",
	"被指责":"😟",
	"受伤":"😭💔",
	"饥饿":"🍽︎",
	"好吃":"😋"
}
@export var unit_data:Dictionary={
	"unit_id":"default",
	"unit_type":"default",
	#动画资源
	"sprite_frames":"res://res/animation/other_character_default.tres",
	#动画偏移
	"sprite_offset":Vector2(0,-80),
	#动画缩放
	"sprite_scale":Vector2(5,5),
	#基础属性
	"hp_base":100,
	"atk_base":10,
	"speed_base":1,
	
	
	#攻击方式
	"attack_type":"base",
	
	#下面是临时生成的动态数据
	
	#状态值
	#饥饿,疲劳，怒气，紧张，恐慌，压力
	"hungry":0,
	"fatigue":0,
	"rage":0,
	"tensity":0,
	
	"panic":0,
	#压力
	"pressure":0,
	
	"hp_max":100,
	"hp":100,
	
	"atk":10,
}
#允许的状态队列
var state_value_array:Array=["hungry","fatigue","rage","tensity","panic","pressure","hp_max","hp","atk"]
#设置状态值
func  get_state_value(state_value_name:String):
	if state_value_name in state_value_array:
		return unit_data[state_value_name]
	else:
		return null
#状态值改变时发出信号
signal state_value_changed(state_value_name:String,value)
#设置状态值
func set_state_value(state_value_name:String,value)->bool:
	
	if state_value_name in state_value_array:
		#对每种属性更改进行特殊设置
		match state_value_name:
			"hp":
				if value<=0:
					dead()
		unit_data[state_value_name]=value
		state_value_changed.emit(state_value_name,value)
		return true
	else:
		return false
#获取单位ID
func get_unit_id():
	return unit_data["unit_id"]
#获取单位类型
func get_unit_type():
	return unit_data["unit_type"]
	
#快捷获取
func get_hungry():
	return get_state_value("hungry")
func set_hungry(value):
	return set_state_value("hungry",value)


func get_atk():
	return get_state_value("atk")
func set_atk(value):
	return set_state_value("atk",value)



##单位的独特ID
@export var unit_id:String="default"
##单位所属族群
@export var unit_type:String="default"
##每秒触发的timer,用于计算饥饿值积累等
var second_timer:Timer
@export var animation:AnimatedSprite2D
const unit_speed = 300.0
const JUMP_VELOCITY = -400.0
@export var agent: NavigationAgent2D
@export var state_machine: StateMachine
#旋转中心轴
@export var rotate: Node2D

##与其他单位交互的范围，目标进入此范围内才进行交互
@export var touch_area:Area2D
##感知范围
@export var sense_area:Area2D

@export var attack_area:Area2D






#var hungry:float=0:
	#set(val):
		#hungry=val
		#if %hungry!=null:
			#%hungry.text="饥饿值："+str(val)
func _ready() -> void:
	Global.set_unit_instance(unit_id,self)
	agent.max_speed=unit_speed
	agent.velocity_computed.connect(safe_speed)
	if animation!=null:
		animation.frame_changed.connect(frame_changed)
	second_timer=Timer.new()
	second_timer.autostart=true
	second_timer.one_shot=false
	second_timer.wait_time=1
	second_timer.timeout.connect(second_timer_time_out)
	add_child(second_timer)
	
	var new_sprite_animation:AnimatedSprite2D=AnimatedSprite2D.new()
	new_sprite_animation.sprite_frames=load(unit_data["sprite_frames"])
	
	add_child(new_sprite_animation)
	new_sprite_animation.position=unit_data["sprite_offset"]
	new_sprite_animation.scale=unit_data["sprite_scale"]
	animation=new_sprite_animation
	animation.frame_changed.connect(frame_changed)
	#state_machine.launch()
func set_target_pos(target:Vector2):
	agent.target_position=target
	
func _physics_process(delta: float) -> void:
	if agent!=null and not is_move_finished():
		var current_pos:Vector2=global_position
		var next_pos:Vector2=agent.get_next_path_position()
		var new_velocity=current_pos.direction_to(next_pos)*unit_speed
		if agent.avoidance_enabled:
			agent.set_velocity(new_velocity)
			rotate.rotation=velocity.angle()
		else:
			safe_speed(new_velocity)
			rotate.rotation=velocity.angle()
	if is_move_finished():
		velocity=Vector2.ZERO
	else:
		cache_velicity=velocity
	if animation!=null:
		if velocity.x>0:
			animation.flip_h=false
		if velocity.x<0:
			animation.flip_h=true
	
	move_and_slide()

func safe_speed(safe_velocity):
	velocity=safe_velocity	

func stop_move():
	set_target_pos(self.global_position)

func is_move_finished():
	#return agent.is_target_reached()
	return agent.is_navigation_finished()

func sent_message(type:String,value):
	state_machine.send_message(type,value)


#判断unit实例在不在交互范围内
func is_unit_instance_in_touch_area(instance:Node):
	if touch_area==null:
		return false
	else:
		if instance is PhysicsBody2D:
			return instance in touch_area.get_overlapping_bodies()
		if instance is Area2D:
			return instance in touch_area.get_overlapping_areas()

#判断单位是否再攻击范围内
func is_unit_instance_in_attack_area(instance:Node):
	if attack_area==null:
		return false
	else:
		if instance is PhysicsBody2D:
			return instance in attack_area.get_overlapping_bodies()
		if instance is Area2D:
			return instance in attack_area.get_overlapping_areas()
	
	pass
#指责（口角）
func accuse(unit_id:String):
	show_action("指责")
	var instance=Global.get_unit_instance(unit_id)
	if instance is UnitOther:
		instance.accused(self.unit_id)
	pass
#被指责，调用
func accused(by_unit_id:String):
	show_action("被指责")
	Global.set_unit_favour(unit_id,by_unit_id,Global.get_unit_favour(unit_id,by_unit_id)-10)
	pass
@export var attack_frames:int=2


#攻击
func attack():
	show_action("伤害")
	match get_dir():
		0:
			play_animation("up_attack")
		1:
			play_animation("down_attack")
		2:
			play_animation("left_right_attack")
		3:
			play_animation("left_right_attack")
	pass

func frame_changed():
	if animation.animation in [&"up_attack",&"down_attack",&"left_right_attack"] and animation.frame==attack_frames:
		use_attack_damage()
func is_attack_finished():
	if animation.animation in [&"up_attack",&"down_attack",&"left_right_attack"] and not animation.is_playing():
		return true
	else:
		return false
func is_attacking():
	return animation.animation in [&"up_attack",&"down_attack",&"left_right_attack"] and  animation.is_playing()
#在固定帧使用攻击
func use_attack_damage():
	print("使用攻击")
	for i in attack_area.get_overlapping_bodies():
		if i is Unit and i!=self:
			i.attacked(unit_id,get_atk())
	
	pass
func attacked(by_unit_id:String,damage:float):
	show_action("受伤")
	Global.set_unit_favour(unit_id,by_unit_id,Global.get_unit_favour(unit_id,by_unit_id)-20)
	set_state_value("hp",get_state_value("hp")-damage)
	
	pass
func set_target(global_pos:Vector2):
	cache_velicity=global_pos-self.global_position
	rotate.look_at(global_pos)
	if cache_velicity.x>0:
		animation.flip_h=false
	if cache_velicity.x<0:
		animation.flip_h=true
	
	pass
func show_action(type:String):
	print(type)
	if action_emoji.has(type):
		%action_show.text=action_emoji[type]
		if %action_animation.is_playing():
			%action_animation.stop()
		%action_animation.play("show")
		
		pass
func play_animation(animation_name:String):
	if animation !=null:
		animation.play(animation_name)
	
	pass
var cache_velicity:Vector2=Vector2(1,0)
#0上，1下，2左,3右
func get_dir()->int:
	if abs(cache_velicity.y)>abs(cache_velicity.x):
		
		if cache_velicity.y>0:
			return 1
			
		else:
			return 0
			
	else:
		if cache_velicity.x>0:
			return 3
		
		else:
			return 2
		pass
	pass

func second_timer_time_out():
	
	set_hungry(clamp(get_hungry()+1,0,100))
	
	pass
func eat(food:Food):
	print("吃")
	show_action("好吃")
	set_hungry(clamp(get_hungry()-food.hungry,0,100))
	food.eated()
	pass

const DEAD_SCENE = preload("res://scene/character/dead_scene_sprite/dead_scene.tscn")
func dead():
	var new_dead_scene=DEAD_SCENE.instantiate()
	new_dead_scene.sprite_frames=animation.sprite_frames
	new_dead_scene.global_position=animation.global_position
	new_dead_scene.scale=animation.scale
	get_parent().add_child(new_dead_scene)
	Global.delete_unit_instance(unit_id)
	queue_free()
	pass