class_name StateAnimatedActor
extends State
## Animation and movement state class
##
## A state intended to control the movement and animation
## functions of a KinimaticBody2D node. Initialized with a
## player, movement node, and kinematicbody2d 
## I think if we also had modifier states that transfered along with the enter and entrance of nodes, that would be helpful.
##
## @WIP

# export (NodePath) var jump_node

# onready var jump_state: State = get_node(jump_node)

## Deprecated
# export var animation_name: String

export var move_speed: float = 60

export(Array, String) var animation_sequence

signal frame_reached(state_name, animation_name, frame_number)
export(Dictionary) var emitter_frame_subscriptions
var frame_signal_emitted: bool = false

# this just wouldn't work well. Maybe I can try a resource 
# export(Array, NodePath) var transition_state_nodes

#TODO: I think these two variables accidentally serve the same purpose
# I think one was intended to be a string of the current animation name. 
var animation_index: int = 0
var current_animation_sequence: int = 0
var animation_suffix: String = '';


var gravity: int = ProjectSettings.get_setting("physics/2d/default_gravity")

var animations: AnimatedSprite
var move_component: MovementComponent
var parent: KinematicBody2D

#var animation_sequence_timer: Timer



func _ready():
	##TODO: this bit me in the butt. Should add a safety or something.
	# Only add timout node if timer value was specified.
	if(timeout_seconds > 0.0):
		state_timeout = Timer.new()
		state_timeout.wait_time = timeout_seconds
		state_timeout.one_shot = true
		state_timeout.autostart = false
		add_child(state_timeout)


func enter() -> void:
#	animations.connect("animation_finished", self, "_on_AnimatedSprite_animation_finished")
	# Reset animation suffix in case there isn't one
	animation_suffix = ''
	if debug_state:
		print(parent.name, " entering State: ", self.name)
	move_component.current_movement_state = self.name
	emit_signal("state_entered")
	#modifier_stack_ref = state_modifiers
	if modifier_stack_ref.empty() == false: # a modifier is applied
		if modifier_stack_ref[-1].animation_name != '': # the first one has an animation
			if modifier_stack_ref[-1].animation_suffix: # it's a suffix type
				if animation_sequence.size() > 0: # the current animation is multipart (sequence > 0)
					animation_index = 0
					current_animation_sequence = 0
					# Guess I don't need this one anymore
					#if animations.frames.get_animation_names().has(animation_sequence[animation_index] + modifier_stack_ref[-1].animation_name): 
					if animations.frames.has_animation(animation_sequence[animation_index] + modifier_stack_ref[-1].animation_name):
						animation_suffix = modifier_stack_ref[-1].animation_name
			else:
				animations.play(modifier_stack_ref[-1].animation_name)
				animations.frame = modifier_stack_ref[-1].starting_frame
				return
	if animation_sequence.size() > 0:
		animation_index = 0
		current_animation_sequence = 0
		animations.play(animation_sequence[animation_index] + animation_suffix)
		return

func exit() -> void:
	emit_signal("state_exited")
#	animations.disconnect("animation_finished", self, "_on_AnimatedSprite_animation_finished")
	return

func process_input(_event: InputEvent) -> State:
	return null

func process_frame(_delta: float) -> State:
	#if animation_sequence.size() > 0 and current_animation_sequence != animation_index:
	if animation_sequence.size() > animation_index and current_animation_sequence != animation_index:
		if animation_index >= animation_sequence.size():
			animation_index = 0
		##TODO: Add a safety check here. 
		animations.play(animation_sequence[animation_index] + animation_suffix)
		if debug_state:
			print("An animation sequence: ", animations.animation , animation_index)
		current_animation_sequence = animation_index
	# We have no more sequence animations and the current one doesn't loop
	# we do this to prevent the default idle animation from playing.
	if animation_index >= animation_sequence.size() and animations.frames.get_animation_loop(
			animations.animation) == false:
		animations.stop()

	# Singal based frame call. 
	if emitter_frame_subscriptions.has(animations.frame):
		if emitter_frame_subscriptions[animations.frame] == animations.animation:
			if frame_signal_emitted == false:
				emit_signal("frame_reached", self.name, animations.animation, animations.frame)
				# Try to only so this once.
				frame_signal_emitted = true
	else:
		frame_signal_emitted = false

	return null

func process_physics(_delta: float) -> State:
	move_actor_as_desired(_delta)
	return null

#func _on_AnimatedSprite_animation_finished():
#	if animations.frames.get_animation_loop(animations.animation) == false:
#		animation_index += 1

func move_actor_as_desired(delta: float):
	move_component.velocity.y += gravity * delta
	#parent.velocity = parent.move_and_slide(parent.velocity, Vector2(0, -1))
	move_component.velocity.x = move_component.desired_movement_vector.x * move_speed
	move_component.velocity = parent.move_and_slide(move_component.velocity, Vector2(0, -1))
	
func push_animation_state_modifier(modifier: StateModifier):
	if modifier_stack_ref.has(modifier) == false:
		modifier.enter()
		modifier_stack_ref.push_front(modifier)