extends Area2D

# Signals
signal start	# The bird starts
signal passed	# The bird passes a Tower
signal hit		# The bird is hit/flies off screen

var screen_size # The screen size, we want this at a later point

# Speed variables
@export var speed = 3  # How fast the player will move (pixels/sec).
@export var jump_speed = 4 # Speed at which the bird gains height after jumping
@export var speed_inc = 0.3 # Speed at which the bird falls
var speed_y = 0 # Y speed of the bird

var playing = false # State of the game

func start_game():
	screen_size = get_viewport_rect().size
	position = Vector2(0, screen_size.y / 2)
	speed_y = 0
	update_rotation()

# Called when the node enters the scene tree for the first time
func _ready():
	# We want the screen size to check if something is off screen
	screen_size = get_viewport_rect().size

# Called every frame
func _process(_delta):
	# Every frame we want to move the bird
	# The player can influence the movement by pressing space
	
	# An Area2D can have a position, split between x speed and y speed
	# Right now we want to bird to move at a set pace so x is constant
	# It's up to you to change the y accordingly.
	
	# Check if space is pressed
	if Input.is_action_just_pressed("ui_accept"):
		# Player pressed space -> Move the bird up
		# Space is pressed, change the y speed so it gains height
		# TODO 1
		
		# When we're not playing and space is hit then the game starts -> emit the right signal
		# TODO 2
		pass
		
	# Potential space are handled
	# Decrease the y speed 
	# TODO 1
	
	# Emit signal when a pipe is passed
	# TODO 3
	
	# Update the position with the new x and y speed
	position += Vector2(speed, speed_y * speed)
	
	# Rotate the bird
	update_rotation()

# Rotate the bird		
func update_rotation():
	rotation = atan(speed_y / speed)

# We want to trigger this function when the bird hits a tower
# Connect the function with the Area2D signal 'body_entered(body: Node2D)'
# Do this by pressing on the Area2D, go to the 'Node' tab on the right side and right clicking on the desired signal.
func _on_Player_body_entered(_body):
	# Set the right variables and emit the right signals so the game restarts
	# TODO 2