extends Node
## Autoload "Session" -- carries the "which world am I joining" handoff from
## the world browser to the game scene.
##
## world_list.gd calls begin() with the address returned by
## POST /api/worlds/{id}/join; game.gd reads it in _ready() to decide whether
## to run networked or fall back to local single-player (e.g. game.tscn opened
## directly, or the backend has no orchestration).
##
## world_list.gd also calls begin_edit() for the "Edit world" entry point
## (docs/architecture/world_persistence_impl.md §6 D4): editing is
## deliberately **non-joined** -- it never calls POST /join, so `active`
## stays false and game.gd never opens an ENet connection for it. `editing`
## is the separate signal game.gd checks to open the in-game editor against
## a real, HTTP-fetched chunk instead of running gameplay.

var world_id: int = 0
var host: String = ""
var port: int = 0
var active: bool = false
var editing: bool = false


func begin(p_world_id: int, p_host: String, p_port: int) -> void:
	world_id = p_world_id
	host = p_host
	port = p_port
	active = true
	editing = false


## Enter "Edit world" (world_persistence_impl.md §6 D4): non-joined, no
## ENet connection, no dedicated server. game.gd loads/saves chunks over
## HTTP instead.
func begin_edit(p_world_id: int) -> void:
	world_id = p_world_id
	host = ""
	port = 0
	active = false
	editing = true


func clear() -> void:
	world_id = 0
	host = ""
	port = 0
	active = false
	editing = false


func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventKey and event.pressed and not event.echo:
		if event.keycode == KEY_F11 or (event.keycode == KEY_ENTER and event.alt_pressed):
			toggle_fullscreen()
			get_viewport().set_input_as_handled()


func toggle_fullscreen() -> void:
	if DisplayServer.get_name() == "headless":
		return
	var current_mode := DisplayServer.window_get_mode()
	if current_mode == DisplayServer.WINDOW_MODE_FULLSCREEN or current_mode == DisplayServer.WINDOW_MODE_EXCLUSIVE_FULLSCREEN:
		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
		var screen_id := DisplayServer.window_get_current_screen()
		var screen_rect := DisplayServer.screen_get_usable_rect(screen_id)
		var target_w := mini(1280, int(screen_rect.size.x * 0.9))
		var target_h := mini(720, int(screen_rect.size.y * 0.9))
		DisplayServer.window_set_size(Vector2i(target_w, target_h))
		var pos := screen_rect.position + (screen_rect.size - Vector2i(target_w, target_h)) / 2
		DisplayServer.window_set_position(pos)
	else:
		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)