# This script controls a top-down player character using input and rotates towards the mouse or right stick.
extends CharacterBody2D

# Player movement speed (pixels per second)
@export var speed = 200

@export var friction = 16

# Rotation speed (radians per second) - adjust for desired rotation speed
@export var rotation_speed = PI * 4 # Rotate 2 full circles per second

# Use mouse for rotation? If false, uses gamepad right stick.
@export var rotate_with_mouse = true

# Called every physics frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(delta):
	# --- Movement Logic ---
	var input_vector = Input.get_vector("move_left", "move_right", "move_up", "move_down")

	# Set the velocity based on input
	if input_vector != Vector2.ZERO:
		velocity = input_vector * speed
	else:
		# If no input, stop the player (optional, you might want friction instead)
		velocity = lerp(velocity, Vector2.ZERO, friction * delta)

	# Move the player and handle collisions using CharacterBody2D's move_and_slide
	move_and_slide()

	# --- Rotation Logic ---
	var target_rotation_direction = Vector2.ZERO

	if rotate_with_mouse:
		# Get the mouse position in world coordinates
		var mouse_position = get_global_mouse_position()
		# Calculate the direction vector from the player to the mouse
		target_rotation_direction = global_position.direction_to(mouse_position)
	else:
		# Get right analog stick input
		target_rotation_direction = Input.get_vector("rotate_left", "rotate_right", "rotate_up", "rotate_down")

	# If there is a valid rotation direction (either from mouse or stick input)
	if target_rotation_direction != Vector2.ZERO:
		# Calculate the target rotation angle in radians
		var target_angle = target_rotation_direction.angle()

		# Smoothly rotate the player towards the target angle
		# Using lerp_angle for smooth interpolation of angles
		rotation = lerp_angle(rotation, target_angle, rotation_speed * delta)

# Note: Make sure you have input actions configured in Project Settings -> Input Map:
# - "move_up", "move_down", "move_left", "move_right" for movement.
# - If not using mouse rotation, add "rotate_up", "rotate_down", "rotate_left", "rotate_right"
#   and map them to the right analog stick axes (e.g., Joy Axis 4- for left, Joy Axis 4+ for right, etc.)