class_name GameState
extends RefCounted
## Luck-centric game state (spec decision 5). The SOLE home of numeric Luck,
## stats, world-NPC dispositions, and inventory — none of which enter the canon
## log (charter §7/§2). The log reads only luck_descriptor() from here.

var luck: int = 0
var luck_base: int = 0
var stats: Dictionary = {}            # {str, dex, con, fth, mag}
var npc_dispositions: Dictionary = {} # world-npc id -> int (−100..100)
var inventory: Dictionary = {}        # item_id -> qty
var revealed_topics: Dictionary = {}  # topic_id -> true
var gifts_given: Dictionary = {}      # item_id -> true (idempotency for give_item)


func set_luck(v: int) -> void:
	luck = clampi(v, Luck.MIN, Luck.MAX)


func drift_luck(delta: int) -> void:
	luck = Luck.drift(luck, luck_base, delta)


func luck_descriptor() -> String:
	return Luck.descriptor(luck)


func set_npc_disposition(id: String, v: int) -> void:
	npc_dispositions[id] = clampi(v, -100, 100)


func add_item(item_id: String, qty: int) -> void:
	inventory[item_id] = int(inventory.get(item_id, 0)) + qty


func remove_item(item_id: String, qty: int) -> void:
	var left := int(inventory.get(item_id, 0)) - qty
	if left > 0:
		inventory[item_id] = left
	else:
		inventory.erase(item_id)


func mark_revealed(topic_id: String) -> void:
	revealed_topics[topic_id] = true


func is_revealed(topic_id: String) -> bool:
	return revealed_topics.has(topic_id)


func mark_gift_given(item_id: String) -> void:
	gifts_given[item_id] = true


func is_gift_given(item_id: String) -> bool:
	return gifts_given.has(item_id)