package workflowscope

import "chat-agent-system/internal/workflowdef"

const (
	// WeightSame 当前激活工作流。
	WeightSame = 1.0
	// WeightUnknown 文档没有工作流归属（存量行）。
	WeightUnknown = 0.80
	// WeightAdjacent 同产品域且目录序相邻（|Δorder| == 10）。
	WeightAdjacent = 0.60
	// WeightSameDomain 同产品域但目录序更远。
	WeightSameDomain = 0.50
	// WeightCrossDomain 医疗四与软件两之间。
	WeightCrossDomain = 0.35
)

// RelationWeight 按「当前激活工作流 ↔ 文档所属工作流」给出关系权重。
// active 为空时不惩罚（调用方应不过滤）。owner 为空视为归属未知。
func RelationWeight(active, owner string) float64 {
	if active == "" {
		return WeightSame
	}
	if owner == "" {
		return WeightUnknown
	}
	if active == owner {
		return WeightSame
	}
	if !sameProductDomain(active, owner) {
		return WeightCrossDomain
	}
	activeOrder := workflowdef.OfficialCatalogOrder(active)
	ownerOrder := workflowdef.OfficialCatalogOrder(owner)
	if activeOrder != 9999 && ownerOrder != 9999 && absInt(activeOrder-ownerOrder) == 10 {
		return WeightAdjacent
	}
	return WeightSameDomain
}

func sameProductDomain(a, b string) bool {
	aMed := workflowdef.IsMedicalWorkflowKey(a)
	bMed := workflowdef.IsMedicalWorkflowKey(b)
	if aMed || bMed {
		return aMed && bMed
	}
	return workflowdef.IsSoftwareWorkflowKey(a) && workflowdef.IsSoftwareWorkflowKey(b)
}

func absInt(v int) int {
	if v < 0 {
		return -v
	}
	return v
}