extends Node
## Top-level mutable game state. SaveSystem serializes via save_dict() / apply_dict().
##
## Holds session-wide flags and the "what map are we on" pointer. Per-entity state
## lives on the entities themselves; per-tile state on the TileMap or World.
## See docs/architecture.md.

var current_map_id: StringName = &"slice_temperate_forest"
var session_started_at_unix: int = 0  # for "you've been away X minutes" toast


func _ready() -> void:
	session_started_at_unix = int(Time.get_unix_time_from_system())


# Phase 16 expands these into real save round-trip.
func save_dict() -> Dictionary:
	return {
		"current_map_id": String(current_map_id),
		"session_started_at_unix": session_started_at_unix,
	}


func apply_dict(d: Dictionary) -> void:
	if d.has("current_map_id"):
		current_map_id = StringName(d["current_map_id"])
	if d.has("session_started_at_unix"):
		session_started_at_unix = int(d["session_started_at_unix"])