# VERTICAL SLICE - NOT FOR PRODUCTION
# Date: 2026-10-04（双层 BD 实施批 T1——标签档位激活引擎）
# 流派成型判据机制化（整合定稿 设计工具 1——以撒套装/小骨铭文先例）：
#   同流派标签 relic 计数 ≥2 → 档一（流派核心规则）；≥4 → 档二（完全体）；<2 = 散件（单体保底——
#   每件效果独立生效，档位只做质变不做启动，反例 B-2）。
# 纯函数零 await 零 RNG 零副作用（Attunement 求值服务同款纪律）；核心层零特判延伸——引擎只读
# relic_table 行集与持有集，接线点消费 tiers/hooks 投影。
class_name RelicsEngine
extends RefCounted


## 档位求值：relic_ids 持有集 × 行集 → {archetype: tier}（tier ∈ 0/1/2；无行流派不出现）
static func tiers_for(relic_ids: Array, table: RelicTable) -> Dictionary:
	var counts := {}
	for rid in relic_ids:
		var row: Dictionary = table.row_by_id(String(rid)) if table != null else {}
		if row.is_empty():
			continue
		var arch := String(row.get("archetype", ""))
		counts[arch] = int(counts.get(arch, 0)) + 1
	var out := {}
	for arch in counts.keys():
		var n := int(counts[arch])
		if n >= 4:
			out[arch] = 2
		elif n >= 2:
			out[arch] = 1
		else:
			out[arch] = 0
	return out


## 挂点投影：持有集 → [{relic_id, hook, archetype, tier, effects}]（表序稳定——同集合同投影，
## MC 逐位可复放承载）
static func hooks_for(relic_ids: Array, table: RelicTable) -> Array:
	var out: Array = []
	for rid in relic_ids:
		var row: Dictionary = table.row_by_id(String(rid)) if table != null else {}
		if row.is_empty():
			continue
		out.append({
			"relic_id": String(row.get("relic_id", "")),
			"hook": String(row.get("hook", "")),
			"archetype": String(row.get("archetype", "")),
			"effects": (row.get("effects", {}) as Dictionary).duplicate(true),
		})
	return out


## 成型判读（读数面口径）：流派 tier ≥1 = 成型（档一即判——任务书完成定义「标签+档位激活引擎可判成型」）
static func is_formed(tiers: Dictionary, archetype: String) -> bool:
	return int(tiers.get(archetype, 0)) >= 1