extends Node3D

@export_category("Speed")
@onready var move_speed: float = ProjectSettings.get_setting("game/controls/camera_move_speed",20.0)
@onready var zoom_speed: float = ProjectSettings.get_setting("game/controls/camera_zoom_speed",20.0)
@export_category("Limits")
@export_range(-10,10,1) var zoom_min: float = -8
@export_range(11,50,1) var zoom_max: float = 20
@export_range(0,0.95,0.01) var zoom_speed_damp: float = 0.5

@export_range(0,32,4) var edge_scrolling_margin: int = ProjectSettings.get_setting("game/controls/edge_scrolling_margin",8)
@onready var edge_scrolling_speed: float = ProjectSettings.get_setting("game/controls/edge_scrolling_speed",25.0)

@onready var socket: Node3D = $camera_point
@onready var cam : Camera3D = %camera_player

var zoom_direction : float = 0.0 ## 0.0 means no zoom. Use 1.0 for moving toward the floor
var move_disabled:bool = false
var zoom_disabled:bool = false
var edge_scroll_disabled:bool = ProjectSettings.get_setting("game/controls/edge_scrolling_disabled",false)


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	cam_move(delta)
	cam_zoom(delta)
	cam_edge_scroll(delta)


func _unhandled_input(event: InputEvent) -> void:
	if event.is_action("scroll_up"):
		zoom_direction = -1
	if event.is_action("scroll_down"):
		zoom_direction = 1


## Controls the movement of the player camera
func cam_move(delta:float) -> void:
	if move_disabled:return
	var velocity_direction := Vector3.ZERO

	if Input.is_action_pressed("cam_backward"): velocity_direction -= transform.basis.x
	if Input.is_action_pressed("cam_forward"): velocity_direction += transform.basis.x
	if Input.is_action_pressed("cam_left"): velocity_direction -= transform.basis.z
	if Input.is_action_pressed("cam_right"): velocity_direction += transform.basis.z

	position += velocity_direction.normalized() * delta * move_speed * get_zoom_factor()


## Controls the zoom of the player camera
## [br]
## [param zoom_direction] control the direction.
## 0.0 means no zoom. Use 1.0 for moving toward the floor
func cam_zoom(delta:float) -> void:
	if zoom_disabled:return

	var new_zoom: float = clamp(cam.position.z + zoom_speed * zoom_direction * delta,zoom_min,zoom_max)
	print(new_zoom)
	cam.position.z = new_zoom

	zoom_direction *= zoom_speed_damp #Smooth the deceleration


func get_mouse_position() -> Vector2:
	return get_viewport().get_mouse_position()


## multiplicator for movement speed, based on zoom level
func get_zoom_factor() -> float:
	return remap(cam.position.z,zoom_min,zoom_max,0.1,2.0)


func cam_edge_scroll(delta:float) -> void:
	if edge_scroll_disabled:return
	var current_viewport = get_viewport()
	var pan_direction := Vector2(0,0) #Edge scrolling to bottom left by default, changing that if needed
	var viewport_rectange := Rect2i(current_viewport.get_visible_rect())
	var viewport_size := viewport_rectange.size
	var mouse_position = get_mouse_position()

	# X PAN
	if (mouse_position.x < edge_scrolling_margin or (mouse_position.x > viewport_size.x - edge_scrolling_margin)):
		pan_direction.x = 1 if (mouse_position.x > viewport_size.x/2) else -1 # detect if we are in the half of the screen or not

	# Y PAN
	if (mouse_position.y < edge_scrolling_margin or (mouse_position.y > viewport_size.y - edge_scrolling_margin)):
		pan_direction.y = 1 if (mouse_position.y < viewport_size.y/2) else -1 # detect if we are in the half of the screen or not

	var pan_vector:= Vector2(pan_direction.x,pan_direction.y) * delta * edge_scrolling_speed * get_zoom_factor()

	translate_object_local(Vector3(pan_vector.y,0,pan_vector.x))