/**
 * Harbor image promote + optional ACK deploy (loaded from Jenkinsfile, not a job entry).
 */

def resolveTargetTag(def script, String targetTagParam) {
    def t = (targetTagParam ?: '').trim()
    return t ?: "produ-${script.env.BUILD_NUMBER}"
}

def requireSourceTag(def script, String sourceTag) {
    def srcTag = (sourceTag ?: '').trim()
    if (!srcTag) {
        script.error('SOURCE_TAG is required (e.g. uat-latest or uat-build-42). Check Harbor for an existing tag.')
    }
    return srcTag
}

def promoteHarborImages(def script, List services, Map cfg) {
    def regHost = cfg.harborRegistry.trim()
    def proj = cfg.harborProject.trim()
    def srcTag = requireSourceTag(script, cfg.sourceTag)
    def tgtTag = cfg.targetTag
    def dryRun = cfg.dryRun == true

    services.each { s ->
        def src = "${regHost}/${proj}/${s.prodDir}:${srcTag}"
        def tgt = "${regHost}/${proj}/${s.prodDir}:${tgtTag}"
        echo ">>> promote ${s.prodDir}: ${src} -> ${tgt}"
        if (dryRun) {
            return
        }
    }
    if (dryRun) {
        return
    }

    script.withCredentials([script.usernamePassword(
        credentialsId: cfg.harborCredentialsId,
        usernameVariable: 'HARBOR_USER',
        passwordVariable: 'HARBOR_PASS',
    )]) {
        script.sh """
            set -e
            echo "\${HARBOR_PASS}" | docker login ${regHost} -u "\${HARBOR_USER}" --password-stdin
        """
        services.each { s ->
            def src = "${regHost}/${proj}/${s.prodDir}:${srcTag}"
            def tgt = "${regHost}/${proj}/${s.prodDir}:${tgtTag}"
            script.sh """
                set -e
                docker pull ${src}
                docker tag ${src} ${tgt}
                docker push ${tgt}
            """
        }
    }
}

def deployToAck(def script, Map cfg) {
    def ns = cfg.k8sNamespace
    def imageRef = cfg.imageRef
    def strategy = cfg.deployStrategy
    def targetDeploy = strategy == 'canary' ? cfg.deploymentCanary : cfg.deploymentStable
    def canaryWeight = cfg.canaryWeight
    def ingressCanary = cfg.ingressCanary
    def kubeCreds = cfg.kubeCredentialsId

    script.withCredentials([script.file(credentialsId: kubeCreds, variable: 'KUBECONFIG')]) {
        script.sh """
            set -e
            kubectl config current-context
            kubectl -n ${ns} set image deployment/${targetDeploy} app=${imageRef} --record
            kubectl -n ${ns} rollout status deployment/${targetDeploy} --timeout=300s
        """
        if (strategy == 'canary') {
            script.sh """
                set -e
                kubectl -n ${ns} annotate ingress ${ingressCanary} \\
                    nginx.ingress.kubernetes.io/canary=true \\
                    nginx.ingress.kubernetes.io/canary-weight=${canaryWeight} \\
                    --overwrite
            """
        }
    }
}

/** Single-service promote + ACK. Use script.params / script.env (do not pass params/env as args: CPS breaks method dispatch). */
def promoteOneServiceToAck(def script, Map svc) {
    def regHost = script.params.HARBOR_REGISTRY.trim()
    def proj = script.params.HARBOR_PROJECT.trim()
    def srcTag = requireSourceTag(script, script.params.SOURCE_TAG)
    def tgtTag = resolveTargetTag(script, script.params.TARGET_TAG)
    def dryRun = script.params.DRY_RUN == true
    def strategy = script.params.DEPLOY_STRATEGY ?: 'rolling'

    script.env.TARGET_TAG_RESOLVED = tgtTag
    script.env.IMAGE_REF = "${regHost}/${proj}/${svc.prodDir}:${tgtTag}"

    promoteHarborImages(script, [svc], [
        harborRegistry: regHost,
        harborProject: proj,
        sourceTag: srcTag,
        targetTag: tgtTag,
        harborCredentialsId: script.env.HARBOR_CREDENTIALS,
        dryRun: dryRun,
    ])

    if (dryRun || strategy == 'skip') {
        return
    }

    deployToAck(script, [
        k8sNamespace: script.params.K8S_NAMESPACE,
        imageRef: script.env.IMAGE_REF,
        deployStrategy: strategy == 'canary' ? 'canary' : 'rolling',
        deploymentStable: svc.deployName,
        deploymentCanary: "${svc.deployName}-canary",
        ingressCanary: "${svc.deployName}-canary",
        canaryWeight: (script.params.CANARY_WEIGHT ?: '10').trim(),
        kubeCredentialsId: script.env.KUBECONFIG_CREDENTIALS,
    ])
}

return this