extends KinematicBody2D
class_name Prey


const DIGESTIONGRAD:Gradient = preload("res://other/digestion.tres")
var velocity = Vector2(0,0)
export var draggable = false
var healthmax:int = 1000
var health:int
var SPEED = 320
const JUMPF = -600
const GRAVITY = 30
var TINYWHEN:Vector2 = Vector2(0.3,0.3)# how small to get when shrunk
var collectsize:Vector2 = Vector2(0.3,0.3)# how small to get before can be collected
var squeeze:float = 0.7# how small to get before can be collected
# this walk var will deturmine where the rabbit wants to move.
# if 0, rabbit doesnt move
# if posative number, rabbit moves right and subtract one
# if negative number, rabbit moves left and subtract one
var walk = 0
var mysizeratio = 0 #this will be stored in the prey when eaten
var grabbed = false
onready var tween = $Tween
var inacid = false
onready var grab:Area2D = $grab
var launched = false #when true they dont move until they hit the ground
var preytype = "" #the type of prey from the preydata global dictionary.
var data:Dictionary
var spawn:Vector2
var dead:bool = false


# Called when the node enters the scene tree for the first time.
func _ready():
	health = healthmax
	spawn = position
	add_to_group("prey")
	if preytype.empty():#if no type is specified upon creation, pick random one
		#get choices
		var choices = Global.preydata.keys()
		if choices.empty():
			#if prey list is empty then just delete itself
			queue_free()
			return
		#pick one
		preytype = choices[rand_range(0,choices.size())]
	#load data from prey data dictionary
	data = Global.preydata.get(preytype,{})
	#set the values using get() with defaults:
	_load_data()


func _load_data():
	# set the attributes from the data var
	health = data.get("health",healthmax)
	healthmax = data.get("health",healthmax)
	$Collision.shape = data.get("shape",$Collision.shape)
	$Collision.rotation_degrees = data.get("shaperot",0)
	scale = data.get("size",scale)
	TINYWHEN = data.get("shrunksize",TINYWHEN)
	squeeze = data.get("squeeze",squeeze)
	collectsize = data.get("collectsize",collectsize)
	$flip/body.texture = data.get("SpriteMain",$flip/body.texture)


func _physics_process(delta):
	#move when told to
	if walk > 0 and not grabbed and not launched and not dead:
		velocity.x = SPEED*scale.x
		$AnimatedSprite.flip_h = false
		$flip.scale.x = 1
		walk -= 1
	elif walk < 0 and not grabbed and not launched and not dead:
		velocity.x = -SPEED*scale.x
		$AnimatedSprite.flip_h = true
		$flip.scale.x = -1
	else:
		pass
		#$Sprite.play("idle")
		
	#move it move it
	velocity = move_and_slide(velocity,Vector2.UP)
	if not launched: 
		velocity.x = 0
	#velocity.x = lerp(velocity.x,0,0.2)
	if is_on_wall():
	#	walk = 0
		walk = -walk
	
	#random moving
	if int(rand_range(0,200)) == 0:
		walk = int(rand_range(-100,200))
	
	velocity.y += GRAVITY*scale.x
	
	#random jumping
	if int(rand_range(0,150)) == 0 and is_on_floor() and not grabbed and not dead:
		velocity.y = JUMPF * scale.x
	
	if position.y > 20000: 
		position = spawn
		velocity.y = 0
	
	if grabbed:
		var new_pos:Vector2 = get_global_mouse_position()
#		if not test_move(Transform2D(rotation,new_pos),Vector2.ZERO):
#		if not move_and_collide(new_pos-position,true,true,false):
#			position = new_pos
		velocity = move_and_slide((new_pos-position)*30,Vector2.ZERO,false,4,0.7,true)
		var squeezing:float = clamp(1 - position.distance_to(new_pos) / 1000,squeeze,1)
		$Collision.scale = Vector2(squeezing,squeezing)
	
	if inacid:
		health -= 1
		modulate = DIGESTIONGRAD.interpolate(1-float(health) / float(healthmax))
		#modulate.g = float(health) / float(healthmax)
		#modulate.b = float(health) / float(healthmax)
		#modulate.r += 0.001
	
	if health == 0:
		if get_parent() is PreyGroup:
			get_parent().emit_signal("a_prey_digested")
		queue_free()
	
	dead = (health < healthmax / 2)
	
	if launched and is_on_floor():
		launched = false
		rotation_degrees = 0
	#debegvb
	#print_debug("to ",position)
	#visible = true

func shrink():
	tween.interpolate_property(self,"scale",scale,TINYWHEN,0.6,Tween.TRANS_LINEAR,Tween.EASE_OUT)
	tween.start()

func _input_event(viewport, event, shape_idx):
	#grab prey
	if event is InputEventMouseButton and event.button_index == BUTTON_LEFT and event.pressed:
		grabbed = true

func _input(event):
	#ungrab prey
	if grabbed and event is InputEventMouseButton and event.button_index == BUTTON_LEFT and not event.pressed:
		ungrab()
	elif grabbed and event.is_action_pressed("rotate_CW"):
		rotation_degrees += 15
	elif grabbed and event.is_action_pressed("rotate_CCW"):
		rotation_degrees -= 15


func ungrab():
	grabbed = false
	walk = 0
	launched = true
	$Collision.scale = Vector2.ONE


func set_simple(image):
	#this function is unused now but keep the auto size code for later.
	print($CollisionShape2D.shape.height)
	#set the prey to a simple image and auto make the collision pill
	if image is ImageTexture or true:
		$flip/body.texture = image
		print(image)
		if image.get_height() > image.get_width():
			$CollisionShape2D.rotation = 0
			$CollisionShape2D.shape.radius = image.get_width() / 2
			$CollisionShape2D.shape.height = image.get_height() - $CollisionShape2D.shape.radius*2
		else:
			$CollisionShape2D.shape.radius = image.get_height() / 2
			$CollisionShape2D.shape.height = image.get_width() - $CollisionShape2D.shape.radius*2


func _on_grab_input_event(viewport, event, shape_idx):
	_input_event(viewport, event, shape_idx)