class_name Player extends CharacterBody2D

@onready var raycast_left: RayCast2D = $raycastLeft
@onready var raycast_right: RayCast2D = $raycastRight
@onready var left_marker: Marker2D = $left_marker
@onready var right_marker: Marker2D = $right_marker
@onready var graphic: AnimatedSprite2D = $graphic

signal new_player(player)
signal player_dead(player)

const SPEED = 300.0
const JUMP_VELOCITY = -400.0
var direction : float = 0
enum FaceDirection { LEFT, RIGHT }
var facing: FaceDirection = FaceDirection.LEFT 
var shove_target: RigidBody2D
enum State { IDLE, RUN, JUMP, APEX, FALL, HURT, DYING, DEAD }
var state: State = State.IDLE
var up_jump:bool = false
var health:int = 4

func _ready():
	new_player.emit(self)

func _physics_process(delta: float):
	if self.state != State.HURT and self.state != State.DEAD:
		handle_input()
	handle_movement(delta)
	handle_state()
	handle_animation()
	move_and_slide() # pre-calc next position from velocity
	handle_collisions()

func handle_input():
	if Input.is_action_just_pressed("shove"):
		if shove_target:
			var shove_normal = 1 if facing == FaceDirection.RIGHT else -1
			shove_target.apply_central_impulse(Vector2(shove_normal,0)*700)
	if Input.is_action_just_pressed("jump") and is_on_floor():
		velocity.y = JUMP_VELOCITY
	if Input.is_action_just_pressed("chuck"):
		if facing == FaceDirection.LEFT:
			print("Chuck grenade left")
			%SceneManager.make_grenade(left_marker.global_transform, -1) 
		else:
			print("Chuck grenade right")
			%SceneManager.make_grenade(right_marker.global_transform, 1) 
	# Get the input direction and handle the movement/deceleration.
	# As good practice, you should replace UI actions with custom gameplay actions.
	direction = Input.get_axis("left", "right")
	if direction < 0:
		facing = FaceDirection.LEFT
		graphic.flip_h = true
	elif direction > 0:
		facing = FaceDirection.RIGHT
		graphic.flip_h = false

func handle_movement(delta: float):
	# Add the gravity.
	if not is_on_floor():
		velocity += get_gravity() * delta
	if direction:
		velocity.x = direction * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
	
func handle_collisions():
	if raycast_right.is_colliding() and facing == FaceDirection.RIGHT:
		if raycast_right.get_collider() is RigidBody2D:
			shove_target = raycast_right.get_collider()
	elif raycast_left.is_colliding() and facing == FaceDirection.LEFT:
		if raycast_left.get_collider() is RigidBody2D:
			shove_target = raycast_left.get_collider()
	else:
		shove_target = null
	for i in get_slide_collision_count():
		var c = get_slide_collision(i)
		if c.get_collider() is RigidBody2D:
			c.get_collider().apply_central_impulse(-c.get_normal() * 100)

func handle_state():
	match state:
		State.IDLE when velocity.x != 0:
			state = State.RUN
		State.RUN when velocity.x == 0:
			state = State.IDLE
		State.RUN when velocity.y < 0:
			state = State.JUMP
		State.IDLE when velocity.y < 0:
			state = State.JUMP
		State.JUMP when velocity.y > 0:
			state = State.APEX
		# from APEX to FALL is handled when apex animation finishes
		State.FALL when velocity.y == 0:
			state = State.IDLE

func handle_animation():
	match state:
		State.IDLE:
			graphic.play("idle")
		State.RUN:
			graphic.play("run")
		State.JUMP:
			graphic.play("jump")
		State.APEX:
			graphic.play("apex")
		State.FALL:
			graphic.play("fall")
		State.HURT:
			graphic.play("hurt")
		State.DYING:
			graphic.play("dead")
		State.DEAD:
			pass


func _on_graphic_animation_finished() -> void:
	match state:
		State.APEX: # switch state from apex to fall
			state = State.FALL
		State.HURT: # switch state from hurt to idle
			state = State.IDLE
		State.DYING:
			print("firing dead signal")
			state = State.DEAD
			player_dead.emit(self)
		State.DEAD:
			pass
			
func damage_player(damage: int):
	if self.state != State.DYING and self.state != State.DEAD:
		self.health -= damage
		if self.health <= 0:
			print("DEAD")
			self.state = State.DYING
		else:
			print("player hurt")
			self.state = State.HURT