name: Deploy monie-backend (kaniko)

on:
  push:
    branches: [ main ]
  pull_request:

jobs:
  build-and-deploy:
    runs-on: [self-hosted, linux, k8s]

    env:
      CI_NS: ci
      APP_NS: prod

      # Kaniko job runs inside cluster pods and can reach registry via node IP.
      PUSH_REGISTRY: 192.168.1.250:32000
      # Runtime pull should use the endpoint configured in MicroK8s containerd.
      DEPLOY_REGISTRY: localhost:32000
      IMAGE: monie-backend

      DEPLOYMENT: monie-backend
      CONTAINER: monie-backend

      # repo без кредов (креды берём из secret внутри Kaniko Job)
      REPO_HOST: git.denjs.ru
      REPO_PATH: monie/monie-backend.git

    steps:
      - name: Skip deploy for pull requests
        if: github.event_name == 'pull_request'
        run: echo "Pull request check passed. Deploy runs only on push to main."

      - name: Build & push image with Kaniko (K8s Job)
        if: github.event_name == 'push'
        env:
          SHA: ${{ github.sha }}
          REF: ${{ github.ref_name }}
        run: |
          set -euo pipefail

          JOB="kaniko-${SHA}"
          DEST="${PUSH_REGISTRY}/${IMAGE}:${SHA}"

          kubectl -n "${CI_NS}" delete job "${JOB}" --ignore-not-found=true

          cat <<EOF | kubectl -n "${CI_NS}" apply -f -
          apiVersion: batch/v1
          kind: Job
          metadata:
            name: ${JOB}
          spec:
            backoffLimit: 0
            activeDeadlineSeconds: 1800
            ttlSecondsAfterFinished: 3600
            template:
              spec:
                restartPolicy: Never
                containers:
                  - name: kaniko
                    image: gcr.io/kaniko-project/executor:latest
                    imagePullPolicy: IfNotPresent
                    env:
                      - name: GIT_USERNAME
                        value: denis
                      - name: GIT_PASSWORD
                        valueFrom:
                          secretKeyRef:
                            name: gitea-git-token
                            key: token
                    args:
                      - --dockerfile=Dockerfile
                      - --context=git://${REPO_HOST}/${REPO_PATH}#refs/heads/${REF}
                      - --destination=${DEST}
                      - --verbosity=debug
                      - --cache=true
                      - --cache-repo=${PUSH_REGISTRY}/${IMAGE}-cache
                      - --insecure-registry=${PUSH_REGISTRY}
                      - --skip-tls-verify-registry=${PUSH_REGISTRY}
          EOF

          # ждём terminal state job и не висим 30 минут при явном Failed
          DEADLINE_SECONDS=1800
          START_TS="$(date +%s)"
          OK=1

          while true; do
            SUCCEEDED="$(kubectl -n "${CI_NS}" get job "${JOB}" -o jsonpath='{.status.succeeded}' 2>/dev/null || true)"
            FAILED="$(kubectl -n "${CI_NS}" get job "${JOB}" -o jsonpath='{.status.failed}' 2>/dev/null || true)"

            SUCCEEDED="${SUCCEEDED:-0}"
            FAILED="${FAILED:-0}"

            if [ "${SUCCEEDED}" -ge 1 ]; then
              OK=0
              break
            fi

            if [ "${FAILED}" -ge 1 ]; then
              OK=1
              break
            fi

            NOW_TS="$(date +%s)"
            if [ $((NOW_TS - START_TS)) -ge "${DEADLINE_SECONDS}" ]; then
              OK=2
              break
            fi

            sleep 5
          done

          echo "[ci] job status:"
          kubectl -n "${CI_NS}" get job "${JOB}" -o wide || true

          echo "[ci] job logs (tail):"
          kubectl -n "${CI_NS}" logs "job/${JOB}" --tail=300 || true

          if [ "${OK}" -ne 0 ]; then
            echo "[ci] job did not reach Complete; describing job/pods for debug"
            kubectl -n "${CI_NS}" describe job "${JOB}" || true
            kubectl -n "${CI_NS}" get pods -l job-name="${JOB}" -o wide || true
            kubectl -n "${CI_NS}" describe pod -l job-name="${JOB}" || true
            exit 1
          fi

      - name: Deploy to prod
        if: github.event_name == 'push'
        env:
          SHA: ${{ github.sha }}
        run: |
          set -euo pipefail
          TARGET_IMAGE="${DEPLOY_REGISTRY}/${IMAGE}:${SHA}"

          kubectl -n "${APP_NS}" set image "deployment/${DEPLOYMENT}" \
            "${CONTAINER}=${TARGET_IMAGE}"

          set +e
          kubectl -n "${APP_NS}" rollout status "deployment/${DEPLOYMENT}" --timeout=15m
          ROLLOUT_RC=$?
          set -e

          if [ "${ROLLOUT_RC}" -ne 0 ]; then
            echo "[deploy] rollout did not complete in time; collecting diagnostics"

            SELECTOR="$(kubectl -n "${APP_NS}" get deployment "${DEPLOYMENT}" \
              -o jsonpath='{range $k,$v := .spec.selector.matchLabels}{$k}={$v},{end}' 2>/dev/null || true)"
            SELECTOR="${SELECTOR%,}"

            kubectl -n "${APP_NS}" get deployment "${DEPLOYMENT}" -o wide || true
            kubectl -n "${APP_NS}" describe deployment "${DEPLOYMENT}" || true

            if [ -n "${SELECTOR}" ]; then
              kubectl -n "${APP_NS}" get rs -l "${SELECTOR}" -o wide || true
              kubectl -n "${APP_NS}" get pods -l "${SELECTOR}" -o wide || true
              kubectl -n "${APP_NS}" describe pods -l "${SELECTOR}" || true
            fi

            kubectl -n "${APP_NS}" get events --sort-by=.lastTimestamp | tail -n 100 || true

            DESIRED="$(kubectl -n "${APP_NS}" get deployment "${DEPLOYMENT}" \
              -o jsonpath='{.spec.replicas}' 2>/dev/null || true)"
            UPDATED="$(kubectl -n "${APP_NS}" get deployment "${DEPLOYMENT}" \
              -o jsonpath='{.status.updatedReplicas}' 2>/dev/null || true)"
            AVAILABLE="$(kubectl -n "${APP_NS}" get deployment "${DEPLOYMENT}" \
              -o jsonpath='{.status.availableReplicas}' 2>/dev/null || true)"

            DESIRED="${DESIRED:-0}"
            UPDATED="${UPDATED:-0}"
            AVAILABLE="${AVAILABLE:-0}"

            echo "[deploy] desired=${DESIRED} updated=${UPDATED} available=${AVAILABLE}"

            if [ "${UPDATED}" -ge "${DESIRED}" ] && [ "${AVAILABLE}" -ge "${DESIRED}" ]; then
              echo "[deploy] New replica is healthy; old replica termination is delayed. Continuing."
              exit 0
            fi

            exit "${ROLLOUT_RC}"
          fi