extends Node2D
#网格寻路系统
var astar:AStarGrid2D=AStarGrid2D.new()

##当前使用的tilemap的范围开始
@export var tile_map_area_from:Vector2i
##当前使用的tilemap的范围结束
@export var tile_map_area_to:Vector2i
##color block的颜色指示
enum ColorBlockSetColor{
	BLACK=0,
	BLUE=1,
	GREEN=2,
	RED=3,
	WHITE=4,
	YELLOW=5
}



#镜头部分
#镜头速度
var camera_speed:float=1000
#镜头模式
enum CameraMode{
	#wsad自由移动
	FREE=0,
	#镜头放大，并且进行一个平滑位移
	FOCUS=1
}
##相机模式
@export var camera_mode:CameraMode=CameraMode.FREE
##相机基础缩放乘数
@export var camera_base_zoom_scale:Vector2
##当前聚焦的相机对象
@export var camera_focusmode_focus_target:Node2D:
	set(val):
		if camera_mode==CameraMode.FOCUS and val!=camera_focusmode_focus_target:
			if camera_focus_mode_focus_tween!=null:
				camera_focus_mode_focus_tween.kill()
			camera_focus_mode_focus_tween=create_tween()
			camera_focus_mode_focus_tween.tween_property(%main_camera,"global_position",val.global_position,camera_focus_mode_focus_time)
			camera_focus_mode_focus_tween.set_parallel()
			camera_focus_mode_focus_tween.tween_property(%main_camera,"zoom",camera_base_zoom_scale*camera_focus_mode_focus_scale,camera_focus_mode_focus_time)
		camera_focusmode_focus_target=val
		pass

#聚焦模式下相机的tween补间动画
var camera_focus_mode_focus_tween
#相机聚焦所用时间
var camera_focus_mode_focus_time:float=0.2
#相机聚焦倍率
var camera_focus_mode_focus_scale:float=1.5





##地块Block部分
#全局地块数据引用
#Vector2i:Array[BaseBlock]
var global_block_data:Dictionary={
	
}
#友方单位（需要自己做出行动选择的）
var friendly_side:Array[UnitBlock]=[]

#敌方单位（自动进行行动选择的）
var enermy_side:Array[UnitBlock]=[]

var now_use_block:UnitBlock

var now_use_action:int=-1:
	set(val):
		if now_use_action!=val:
			match val:
				-1:
					%color_block.clear()
					%panel_container.change_open(true)
					var block_action:BlockAction=now_use_block.could_use_action[now_use_action]
					block_action.del_action_with_target()
				_:
					print("尝试进行行动")
					var block_action:BlockAction=now_use_block.could_use_action[val]
					print(block_action.need_target)
					if block_action.need_target:
						
						var res=block_action.get_action_could_use_block(now_use_block,Rect2i(tile_map_area_from,tile_map_area_to-tile_map_area_from),global_block_data)
						print(res)
						show_color_block(res)
						%panel_container.change_open(false)
			pass	
		now_use_action=val
		
		pass

var now_index:int=0
func turn():
	now_index=-1
	for i in global_block_data.keys():
		var arr=global_block_data[i]
		for j in arr:
			if j is BaseBlock:
				j.turn()
	next()
	pass
func next():
	for i in %choice_add_pos.get_children():
		i.queue_free()
	now_index+=1
	now_use_action=-1
	if now_index>=friendly_side.size():
		turn()
		return
	var now_block:UnitBlock=friendly_side[now_index]
	now_use_block=now_block
	var choice_arr=now_block.get_all_choice()
	for i in range(choice_arr.size()):
		var new_btn=Button.new()
		new_btn.pressed.connect(select_choice.bind(i))
		new_btn.text=choice_arr[i]
		%choice_add_pos.add_child(new_btn)
	pass
func select_choice(index:int):
	print(index)
	now_use_action=index
	pass


func _ready() -> void:
	astar.default_compute_heuristic=AStarGrid2D.HEURISTIC_MANHATTAN
	astar.default_estimate_heuristic=AStarGrid2D.HEURISTIC_MANHATTAN
	astar.diagonal_mode=AStarGrid2D.DIAGONAL_MODE_NEVER
	astar.region=Rect2i(tile_map_area_from,tile_map_area_to-tile_map_area_from)
	astar.update()
	update_astar_from_walkable_map()


	for i in range(10):
		add_block(Vector2i(i,i),Database.get_block("wall"),2)
	for i in range(10):
		add_block(Vector2i(i,i+1),Database.get_block("test_character"),0)
	#for i in range(10):
		#add_block(Vector2i(i,i+2),Database.get_block("test_character"),1)
	turn()
#从可行走tilemap图中同步到astar寻路中
func update_astar_from_walkable_map():
	for i in range(tile_map_area_from.x,tile_map_area_to.x):
		for j in range(tile_map_area_from.y,tile_map_area_to.y):
			var crood=Vector2i(i,j)
			var tile_data=%walkable.get_cell_tile_data(crood)
			if tile_data !=null and tile_data.get_custom_data("walkable"):
				astar.set_point_solid(crood,false)
			else:
				astar.set_point_solid(crood,true)
	astar.update()
#获取两点之间的最短可达路径，返回一个数组，0下标未是否可达，1下标为距离，2下标为途径点数组
func get_walkable_path(from:Vector2i,to:Vector2i)->Array:
	#如果不在要求的tilemap范围内，则返回不可达
	if to.x<tile_map_area_from.x or to.x>tile_map_area_to.x or to.y<tile_map_area_from.y or to.y>tile_map_area_to.y:
		return [false,0,null]
	var arr=astar.get_id_path(from,to)
	if arr==null or (arr is Array and arr.size()<=0):
		return [false,0,null]
	
	return [true,arr.size()-1,arr]


#上一帧的缓存
var before_mouse_block:Vector2i=Vector2i.ZERO

func _process(delta: float) -> void:
	match camera_mode:
		CameraMode.FREE:
			var input=Input.get_vector("a","d","w","s").normalized()
			%main_camera.position+=input*delta*camera_speed
		CameraMode.FOCUS:
			pass
	#测试角色移动
	if Input.is_action_just_pressed("mouse_left"):
		print("click")
		if now_use_action!=-1:
			
			var crood=%block_add_pos.local_to_map(get_global_mouse_position())
			var now_action:BlockAction=now_use_block.could_use_action[now_use_action]
			var res=now_action.block_use_action(now_use_block,Rect2i(tile_map_area_from,tile_map_area_to-tile_map_area_from),global_block_data,crood)
			if res:
				now_use_action=-1
			
	if Input.is_action_just_pressed("esc"):
		now_use_action=-1
		
func _input(event: InputEvent) -> void:
	if event is InputEventMouseMotion:
		var mouse_pos=get_global_mouse_position()
		var crood=%mouse_block.local_to_map(mouse_pos)
		update_mouse_block(crood)
		if before_mouse_block!=crood:
			
			before_mouse_block=crood
			draw_action(crood)

func draw_action(target:Vector2i):
	if now_use_action==-1:
		return
	if not now_use_block is UnitBlock:
		return
	var block_action:BlockAction=now_use_block.could_use_action[now_use_action]
	print(block_action.need_target)
	if block_action.need_target:
		block_action.draw_action_with_target(now_use_block,Rect2i(tile_map_area_from,tile_map_area_to-tile_map_area_from),global_block_data,target,%block_add_pos)

#更新鼠标显示
func update_mouse_block(pos:Vector2i,area:Rect2i=Rect2i(0,0,0,0)):
	%mouse_block.clear()
	var area_right=area.position+area.size
	for i in range(area.position.x,area_right.x+1):
		for j in range(area.position.y,area_right.y+1):
			var offset=Vector2i(i,j)
			%mouse_block.set_cell(pos+offset,0,Vector2i(0,0))
	
	pass

func add_block(pos:Vector2i,scene:PackedScene,queue):
	var instance:BaseBlock=scene.instantiate()
	instance.block_pos=pos
	instance.request_block_move.connect(move_block.bind(instance))
	%block_add_pos.add_child(instance)
	match queue:
		0:
			friendly_side.append(instance)
		1:
			enermy_side.append(instance)
	add_block_to_data(instance,pos)
#移动block实例到指定位置
func move_block(from_pos:Vector2i,to_pos:Vector2i,block_instance:BaseBlock):
	if not global_block_data.has(from_pos):
		return
	var arr:Array=global_block_data[from_pos]
	if not block_instance in arr:
		return
	arr.pop_at(arr.find(block_instance))
	if not global_block_data.has(to_pos):
		global_block_data[to_pos]=[block_instance]
	else:
		global_block_data[to_pos].append(block_instance)
	
	pass
#将block的引用添加到全局字典中
func add_block_to_data(block:BaseBlock,pos:Vector2i):
	if not global_block_data.has(pos):
		global_block_data[pos]=[block]
	else:
		global_block_data[pos].append(block)
		pass
	
	
	pass

func show_color_block(arr:Array):
	for i in range((tile_map_area_to-tile_map_area_from).x+1):
		for j in range((tile_map_area_to-tile_map_area_from).y+1):
			var offset=Vector2i(i,j)
			if arr[i][j]:
				%color_block.set_cell(tile_map_area_from+offset,ColorBlockSetColor.GREEN,Vector2i(0,0))
			else:
				%color_block.set_cell(tile_map_area_from+offset,ColorBlockSetColor.RED,Vector2i(0,0))
	pass


func _on_next_pressed() -> void:
	next()
	pass # Replace with function body.