class_name Enemy extends KinematicBody2D

enum STATE {IDLE, WANDER, JUMP, FALL, HURT, ATTACK}
enum STATE_SECONDARY {NONE, SHOOT}

#const WALK_FORCE = 600
const WALK_MAX_SPEED = (30*2)
#const STOP_FORCE = 1300
const JUMP_SPEED = 270

var velocity = Vector2()

var gravity = 60*9.8
var player_state = STATE.IDLE
var player_last_state = null
var animation_play_finished = true
var flip_direction = false

onready var _animated_sprite = $AnimatedSprite


func _physics_process(delta):
	# Horizontal movement 
	if player_state != STATE.WANDER and $IdleTimeout.time_left == 0:
		if flip_direction:
			velocity.x = (1 * WALK_MAX_SPEED)
			flip_direction = false
		else:
			velocity.x = (-1 * WALK_MAX_SPEED)
			flip_direction = true
			
	# Vertical movement code. Apply gravity.
	velocity.y += gravity * delta

	# Move based on the velocity and snap to the ground.
	#velocity = move_and_slide_with_snap(velocity, Vector2.DOWN, Vector2.UP)
	velocity = move_and_slide(velocity, Vector2(0, -1))
		
	# Animate based on last state and velocity 
	if velocity.x > 0 and _animated_sprite.flip_h != true:
		_animated_sprite.flip_h = true
		_animated_sprite.offset.x = 0
		$PlayerDetection.cast_to = Vector2(20,0)
	if velocity.x < 0 and _animated_sprite.flip_h != false:
		_animated_sprite.flip_h = false
		_animated_sprite.offset.x = -18
		$PlayerDetection.cast_to = Vector2(-20,0)

	# forced state changes like falling an gitting hurt
	if velocity.y > 0 and player_state != STATE.JUMP and player_state != STATE.FALL:
		print("STATE_TRANSITION: Fall")
		player_state = STATE.FALL

	if $PlayerDetection.is_colliding():
		player_state = STATE.ATTACK
		player_last_state = null
		velocity.x = 0

	# Each state should trigger its own animation
	match player_state:
		STATE.IDLE:
			# Transitions
			if velocity.y == -JUMP_SPEED:
				print("STATE_TRANSITION: Jump")
				player_last_state = STATE.IDLE
				player_state = STATE.JUMP
			elif velocity.x != 0:
				print("STATE_TRANSITION: Wander")
				player_last_state = STATE.IDLE
				player_state = STATE.WANDER
			# Animation
			if player_last_state != STATE.IDLE:
				_animated_sprite.play("idle")
				player_last_state = STATE.IDLE
				$IdleTimeout.start()

		STATE.JUMP:
			# Transitions
			if is_on_floor():
				print("STATE_TRANSITION: Idle")
				_animated_sprite.play("idle")
				player_last_state = STATE.JUMP
				player_state = STATE.IDLE
			# Animation
			if player_last_state != STATE.JUMP:
				_animated_sprite.play("jump")
				player_last_state = STATE.JUMP

		STATE.FALL:
			# Transitions
			if is_on_floor():
				print("STATE_TRANSITION: Idle")
				_animated_sprite.play("idle")
				player_last_state = STATE.FALL
				player_state = STATE.IDLE
			# Animation
			if player_last_state != STATE.FALL:
				#_animated_sprite.animation = "jump"
				_animated_sprite.frame = 8
				_animated_sprite.stop()
				player_last_state = STATE.FALL

		STATE.WANDER:
			# print (_animated_sprite.animation ) # apparentl playing doesn't stop when loop is disabled.
			# Transitions
			if velocity.y == -JUMP_SPEED:
				print("STATE_TRANSITION: Jump")
				player_last_state = STATE.WANDER
				player_state = STATE.JUMP
			elif velocity.x == 0:
				print("STATE_TRANSITION: Idle")
				player_last_state = STATE.WANDER
				player_state = STATE.IDLE
			# Animation
			if player_last_state != STATE.WANDER:
				$IdleTimeout.start()
				_animated_sprite.play("walk")
				player_last_state = STATE.WANDER
			if $IdleTimeout.time_left == 0:
				$IdleTimeout.start()
				velocity.x = 0
				player_last_state = STATE.WANDER
				player_state = STATE.IDLE

		STATE.ATTACK:
			# Animation
			if player_last_state != STATE.ATTACK:
				$IdleTimeout.start()
				_animated_sprite.play("attack")
				player_last_state = STATE.ATTACK
			if $IdleTimeout.time_left == 0:
				$IdleTimeout.start()
				velocity.x = 0
				player_last_state = STATE.ATTACK
				player_state = STATE.IDLE


func _on_AnimatedSprite_animation_finished():
	animation_play_finished = true
	#print($AnimatedSprite.animation," anim over ", $IdleTimeout.time_left, animation_play_finished)