extends KinematicBody2D

# member variables here, example:
# var a=2
# var b="textvar"

const MAX_SPEED = 300.0
const IDLE_SPEED = 10.0
const ACCEL=5.0
const VSCALE=0.5
const SHOOT_INTERVAL=0.3

var speed=Vector2()
var current_anim=""
var current_mirror=false

var shoot_countdown=0

func _input(ev):
	if (ev.type==InputEvent.MOUSE_BUTTON and ev.button_index==1 and ev.pressed and shoot_countdown<=0):
		var pos = get_canvas_transform().affine_inverse() * ev.pos
		var dir = (pos-get_global_pos()).normalized()
		var bullet = preload("res://shoot.scn").instance()
		bullet.advance_dir=dir
		bullet.set_pos( get_global_pos() + dir * 60 )
		get_parent().add_child(bullet)
		shoot_countdown=SHOOT_INTERVAL
		
		
		

func _fixed_process(delta):
	
	shoot_countdown-=delta
	var dir = Vector2()
	if (Input.is_action_pressed("up")):
		dir+=Vector2(0,-1)
	if (Input.is_action_pressed("down")):
		dir+=Vector2(0,1)
	if (Input.is_action_pressed("left")):
		dir+=Vector2(-1,0)
	if (Input.is_action_pressed("right")):
		dir+=Vector2(1,0)
		
	if (dir!=Vector2()):
		dir=dir.normalized()
	speed = speed.linear_interpolate(dir*MAX_SPEED,delta*ACCEL)
	var motion = speed * delta
	motion.y*=VSCALE
	motion=move(motion)
	
	if (is_colliding()):
		var n = get_collision_normal()
		motion=n.slide(motion)
		move(motion)

	var next_anim=""
	var next_mirror=false
	
	if (dir==Vector2() and speed.length()<IDLE_SPEED):
		next_anim="idle"
		next_mirror=false
	elif (speed.length()>IDLE_SPEED*0.1):
		var angle = atan2(abs(speed.x),speed.y)	
		
		next_mirror = speed.x>0
		if (angle<PI/8):
			next_anim="bottom"
			next_mirror=false
		elif (angle<PI/4+PI/8):
			next_anim="bottom_left"
		elif (angle<PI*2/4+PI/8):
			next_anim="left"
		elif (angle<PI*3/4+PI/8):
			next_anim="top_left"
		else:
			next_anim="top"
			next_mirror=false
		
			
	if (next_anim!=current_anim or next_mirror!=current_mirror):
		get_node("frames").set_flip_h(next_mirror)
		get_node("anim").play(next_anim)
		current_anim=next_anim
		current_mirror=next_mirror
		


func _ready():
	# Initialization here
	set_fixed_process(true)
	set_process_input(true)
	pass