class_name Player extends CharacterBody2D

@onready var right_cast: RayCast2D = $RightCast
@onready var left_cast: RayCast2D = $LeftCast
@onready var right_spawn: Marker2D = $RightSpawn
@onready var left_spawn: Marker2D = $LeftSpawn
@onready var player_graphic: AnimatedSprite2D = $PlayerGraphic

@export var shove_power:= 800
@export var bump_power:=100

enum FaceDirection {LEFT,RIGHT}
var facing:FaceDirection = FaceDirection.RIGHT

var pushRightEnabled = false
var pushLeftEnabled = false
var pushTarget:Crate


const SPEED = 300.0
const JUMP_VELOCITY = -400.0

signal shootSignal(markerPosition, speed)

enum PlayerStates {IDLE,RUNNING,JUMPING,FALLING}
var current_player_state:PlayerStates = PlayerStates.IDLE
var upJump:bool = false


func _physics_process(delta: float) -> void:
	handle_input();
	# Add the gravity.
	if not is_on_floor():
		velocity += get_gravity() * delta
	
	# Handle shove
	if Input.is_action_just_pressed("shove"):
		print("Player wants to shove")
		if pushRightEnabled and facing==FaceDirection.RIGHT:
			#shove right
			pushTarget.apply_central_impulse(Vector2(1,0) * shove_power )
			
		if pushLeftEnabled and facing == FaceDirection.LEFT:
			#shove left
			pushTarget.apply_central_impulse(Vector2(-1,0) * shove_power )
		
	# Handle jump.
	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = JUMP_VELOCITY

	# Get the input direction and handle the movement/deceleration.
	# As good practice, you should replace UI actions with custom gameplay actions.
	var direction := Input.get_axis("ui_left", "ui_right")
	if direction:
		velocity.x = direction * SPEED
		# set player direction
		if direction < 0:
			facing = FaceDirection.LEFT
			player_graphic.flip_h = true
		if direction > 0:
			facing = FaceDirection.RIGHT
			player_graphic.flip_h = false
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
	handle_states()
	handle_animation()
	move_and_slide()
	# find all things my player collided with
	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():
		print("Something on my right")
		#get the thing I can shove
		var collider = right_cast.get_collider()
		if collider is RigidBody2D:
			pushRightEnabled = true
			pushTarget = collider
	else:
		pushRightEnabled = false

	if left_cast.is_colliding():
		print("Something on my left")
		var collider = left_cast.get_collider()
		if collider is RigidBody2D:
			pushLeftEnabled = true
			pushTarget = collider
	else:
		pushLeftEnabled = false

func handle_input()->void:
	# Handle jump.
	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = JUMP_VELOCITY
		current_player_state=PlayerStates.JUMPING
		upJump = true
		
	#Handle Shoot Bullet
	if Input.is_action_just_pressed("shoot"):

		#marker postion, speed
		match facing:
			FaceDirection.RIGHT:
				shootSignal.emit(right_spawn.global_transform, 800)
			FaceDirection.LEFT:
				shootSignal.emit(left_spawn.global_transform, -800)

func handle_states()->void:
	match current_player_state:
		PlayerStates.IDLE when velocity.x !=0:
			#player idle, when x velocity change
			current_player_state = PlayerStates.RUNNING
		PlayerStates.RUNNING when velocity.x ==0:
			#player stops running
			current_player_state = PlayerStates.IDLE
		PlayerStates.JUMPING when velocity.y>0:
			#player reaches top of jump, determined by velocity vs. gravity
			current_player_state = PlayerStates.FALLING
		PlayerStates.FALLING when is_on_floor():
			#player was falling, when suddenly on floor - run or idle
			if velocity.x ==0:
				current_player_state = PlayerStates.IDLE
			else:
				current_player_state = PlayerStates.RUNNING
func handle_animation()->void:
	match current_player_state:
		PlayerStates.RUNNING:
			player_graphic.play("running")
		PlayerStates.IDLE:
			player_graphic.play("idle")
		PlayerStates.JUMPING:
			#don't keep playing the jump animation!
			if upJump:
				player_graphic.play("jumping")
		PlayerStates.FALLING:
			player_graphic.play("falling")
	
	


func _on_animation_finished() -> void:
	match current_player_state:
		PlayerStates.JUMPING:
			upJump = false