msgexchange-v2/src/main/kotlin/com/gzzn/omms/msgexchange/processing/Identity.kt

package com.gzzn.omms.msgexchange.processing

import com.gzzn.omms.msgexchange.config.PipelineProps
import com.gzzn.omms.msgexchange.domain.DecodedMessage
import java.time.LocalDate

/**
 * ACMA-8 I3：幂等键 = SNDR|TYPE|STYP|SEQN。
 * 计算集中此处唯一入口；“是否含日边界”可配置且默认关闭（CONFIRM 矩阵 #11，
 * SEQN 重置作用域确认前不改语义——上线后不改幂等键）。
 */
object Identity {
    fun of(
        msg: DecodedMessage,
        includeDayBoundary: Boolean,
        day: LocalDate = LocalDate.now(),
    ): String {
        val base = "${msg.meta.sndr}|${msg.meta.type}|${msg.meta.styp}|${msg.meta.seqn}"
        return if (includeDayBoundary) "$base|${day}" else base
    }

    fun of(msg: DecodedMessage, props: PipelineProps.Identity): String =
        of(msg, props.includeDayBoundary)
}