extends CharacterBody2D

const SPEED = 300.0
const JUMP_VELOCITY = -600.0

enum FaceDirection{LEFT, RIGHT}

@export var BUMP_POWER = 50
@export var SHOVE_POWER = 200

var facing : FaceDirection = FaceDirection.RIGHT
var direction : float = 0.0
var push_target : RigidBody2D
var push_enabled : bool = false

@onready var right_cast: RayCast2D = $RightCast
@onready var left_cast: RayCast2D = $LeftCast
@onready var right_spawn: Marker2D = $RightSpawn
@onready var left_spawn: Marker2D = $LeftSpawn

func _physics_process(delta: float) -> void:
	handle_input()
	handle_movement(delta)
	move_and_slide()
	handle_collisions()

func handle_input() -> void:
	
	# Handle jumping.
	if Input.is_action_just_pressed("jump") and is_on_floor():
		velocity.y = JUMP_VELOCITY
	direction = Input.get_axis("move_left", "move_right")
	if direction < 0:
		facing = FaceDirection.LEFT
	if direction > 0:
		facing = FaceDirection.RIGHT
	
	# Handle shoving.
	if Input.is_action_just_pressed("shove") and push_enabled == true:
		var shove_direction : int 
		match facing:
			FaceDirection.RIGHT:
				shove_direction = 1
			FaceDirection.LEFT:
				shove_direction = -1
		push_target.apply_central_impulse(Vector2(shove_direction, 0) * SHOVE_POWER)
		
	# Handle shooting.eee
	if Input.is_action_just_pressed("shoot"):
		print("pew-pew")
		match facing:
			FaceDirection.RIGHT:
				%SceneManager.make_bullet(right_spawn.global_transform, 700)
				print("shoot right")
			FaceDirection.LEFT:
				%SceneManager.make_bullet(left_spawn.global_transform, -700)
				print("shoot left")
				
	if Input.is_action_just_pressed("throw"):
		print("grenade!")
		match facing:
			FaceDirection.RIGHT:
				%SceneManager.make_grenade(right_spawn.global_transform, 1.0)
				print("throwing right")
			FaceDirection.LEFT:
				%SceneManager.make_grenade(left_spawn.global_transform, -1.0)
				print("throwing left")

func handle_movement(delta) -> void:
	# Left-right movement.
	if direction:
		velocity.x = direction * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
	
	# Add gravity.
	if not is_on_floor():
		velocity += get_gravity() * delta

func handle_collisions() -> void:
	
	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() * BUMP_POWER)
	
	if right_cast.is_colliding() and facing == FaceDirection.RIGHT:
		var collider = right_cast.get_collider()
		# check if this is OK
		if collider is Node and collider is RigidBody2D and collider.is_in_group("pushable"):
			push_target = collider
			push_enabled = true
	
	if left_cast.is_colliding() and facing == FaceDirection.LEFT:
		var collider = left_cast.get_collider()
		if collider is Node and collider is RigidBody2D and collider.is_in_group("pushable"):
			push_target = collider
			push_enabled = true

	if not right_cast.is_colliding() and not left_cast.is_colliding():
		push_enabled = false