package com.gzzn.omms.msgexchange.config

import io.micronaut.context.annotation.Context
import io.micronaut.context.annotation.Value
import jakarta.inject.Singleton

/**
 * D3 启动自检：Kafka 生产者的 acks / enable-idempotence / max-in-flight 三项
 * 必须联合满足幂等生产前提。不满足时拒绝启动——静默放行会让幂等保证在运行时失效。
 *
 * 独立于 `PipelineLifecycle`（受 autostart 开关控制），无条件执行。
 */
@Singleton
@Context
class KafkaD3Check(
    @Value("\${kafka.producers.default.acks}") acks: String,
    @Value("\${kafka.producers.default.enable-idempotence}") idempotence: String,
    @Value("\${kafka.producers.default.max-in-flight-requests-per-connection}") maxInFlight: String,
) {
    private val acks: String = acks
    private val idempotence: Boolean = idempotence.toBoolean()
    private val maxInFlight: Int = maxInFlight.toInt()

    fun validate() {
        require(acks == "all" || acks == "-1") {
            "D3 violation: kafka.producers.default.acks must be 'all', got '$acks'"
        }
        require(idempotence) {
            "D3 violation: kafka.producers.default.enable-idempotence must be true, got $idempotence"
        }
        require(maxInFlight == 1) {
            "D3 violation: kafka.producers.default.max-in-flight-requests-per-connection must be 1, got $maxInFlight"
        }
    }

    init {
        validate()
    }
}