name: Deploy Hugo Blog to k3s

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  REGISTRY: git.luochen570.cn
  IMAGE: luochen570/hugo-blog
  K8S_NAMESPACE: hugo
  K8S_DEPLOYMENT: hugo-blog
  K8S_CONTAINER: nginx
  K8S_INGRESS: hugo-blog
  TEST_HOST: hugo.test.luochen570.cn
  PROD_HOST: hugo.luochen570.cn
  DOCKER_HOST: unix:///run/user/1000/docker.sock

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    permissions:
      contents: read

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Setup Hugo
        run: |
          set -euo pipefail
          HUGO_VERSION="0.161.1"
          HUGO_DEB="hugo_extended_${HUGO_VERSION}_linux-amd64.deb"
          HUGO_URL="https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/${HUGO_DEB}"

          apt-get update
          apt-get install -y --no-install-recommends ca-certificates curl

          download_hugo() {
            local proxy_name="$1"
            shift
            echo "Trying Hugo download via ${proxy_name}"
            rm -f "/tmp/${HUGO_DEB}"
            env "$@" curl -fL --connect-timeout 20 --retry 5 --retry-all-errors --retry-delay 5 \
              -o "/tmp/${HUGO_DEB}" "$HUGO_URL"
          }

          download_hugo "direct" \
            HTTP_PROXY= HTTPS_PROXY= ALL_PROXY= http_proxy= https_proxy= all_proxy= \
          || download_hugo "cluster mihomo" \
            HTTP_PROXY=http://mihomo.mihomo.svc.cluster.local:7890 HTTPS_PROXY=http://mihomo.mihomo.svc.cluster.local:7890 ALL_PROXY=socks5://mihomo.mihomo.svc.cluster.local:7890 \
            http_proxy=http://mihomo.mihomo.svc.cluster.local:7890 https_proxy=http://mihomo.mihomo.svc.cluster.local:7890 all_proxy=socks5://mihomo.mihomo.svc.cluster.local:7890 \
            NO_PROXY=localhost,127.0.0.1,.svc,.cluster.local,gitea-http.gitea.svc.cluster.local,git.luochen570.cn,mihomo.mihomo.svc.cluster.local

          dpkg -i "/tmp/${HUGO_DEB}"
          hugo version | grep "v${HUGO_VERSION}"

      - name: Hugo Build
        run: |
          set -euo pipefail
          rm -rf public
          hugo --minify
          test -s public/index.html
          if grep -q "Welcome to nginx" public/index.html; then
            echo "public/index.html is nginx default page, aborting" >&2
            exit 1
          fi
          grep -q "洛尘的技术笔记" public/index.html

      - name: Build and Push Docker Image
        env:
          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        run: |
          set -euo pipefail

          # k3s dind-rootless runner: job containers do not have the runner's
          # Unix socket. Prefer the exposed dind TCP API when available, while
          # keeping the Unix socket as a fallback for host-style execution.
          unset DOCKER_TLS_VERIFY DOCKER_CERT_PATH DOCKER_CONTEXT

          # Avoid proxy pollution in the container/rootless Docker path; proxy envs
          # can break image pulls through the slirp4netns namespace.
          unset HTTP_PROXY HTTPS_PROXY ALL_PROXY http_proxy https_proxy all_proxy

          if docker -H unix:///run/user/1000/docker.sock version >/dev/null 2>&1; then
            export DOCKER_HOST="unix:///run/user/1000/docker.sock"
          elif docker -H tcp://127.0.0.1:2375 version >/dev/null 2>&1; then
            export DOCKER_HOST="tcp://127.0.0.1:2375"
          elif docker -H tcp://localhost:2375 version >/dev/null 2>&1; then
            export DOCKER_HOST="tcp://localhost:2375"
          else
            echo "No usable Docker endpoint found" >&2
            exit 1
          fi

          if [ -z "${REGISTRY_TOKEN:-}" ]; then
            echo "REGISTRY_TOKEN secret is required" >&2
            exit 1
          fi

          IMAGE_TAG="${GITHUB_SHA}"
          docker version
          echo "$REGISTRY_TOKEN" | docker login "$REGISTRY" -u luochen570 --password-stdin
          docker build \
            -t "$REGISTRY/$IMAGE:$IMAGE_TAG" \
            -t "$REGISTRY/$IMAGE:latest" \
            .
          docker push "$REGISTRY/$IMAGE:$IMAGE_TAG"
          docker push "$REGISTRY/$IMAGE:latest"

      - name: Deploy to k3s
        env:
          KUBECONFIG_B64: ${{ secrets.KUBECONFIG_B64 }}
        run: |
          set -euo pipefail

          if [ -z "${KUBECONFIG_B64:-}" ]; then
            echo "KUBECONFIG_B64 secret is required" >&2
            exit 1
          fi

          KUBECONFIG_FILE="$(mktemp)"
          trap 'rm -f "$KUBECONFIG_FILE" /tmp/kubectl' EXIT
          echo "$KUBECONFIG_B64" | base64 -d > "$KUBECONFIG_FILE"
          chmod 600 "$KUBECONFIG_FILE"

          KUBECTL_VERSION="v1.32.0"
          download_kubectl() {
            local proxy_name="$1"
            shift
            echo "Trying kubectl download via ${proxy_name}"
            rm -f /tmp/kubectl
            env "$@" curl -fL --connect-timeout 20 --retry 5 --retry-all-errors --retry-delay 5 \
              -o /tmp/kubectl "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl"
          }

          download_kubectl "direct" \
            HTTP_PROXY= HTTPS_PROXY= ALL_PROXY= http_proxy= https_proxy= all_proxy= \
          || download_kubectl "cluster mihomo" \
            HTTP_PROXY=http://mihomo.mihomo.svc.cluster.local:7890 HTTPS_PROXY=http://mihomo.mihomo.svc.cluster.local:7890 ALL_PROXY=socks5://mihomo.mihomo.svc.cluster.local:7890 \
            http_proxy=http://mihomo.mihomo.svc.cluster.local:7890 https_proxy=http://mihomo.mihomo.svc.cluster.local:7890 all_proxy=socks5://mihomo.mihomo.svc.cluster.local:7890 \
            NO_PROXY=localhost,127.0.0.1,.svc,.cluster.local,gitea-http.gitea.svc.cluster.local,git.luochen570.cn,mihomo.mihomo.svc.cluster.local
          chmod +x /tmp/kubectl

          if /tmp/kubectl --kubeconfig "$KUBECONFIG_FILE" \
            auth can-i get ingresses -n "$K8S_NAMESPACE" >/dev/null 2>&1; then
            ingress_hosts="$(/tmp/kubectl --kubeconfig "$KUBECONFIG_FILE" \
              get ingress "$K8S_INGRESS" -n "$K8S_NAMESPACE" \
              --ignore-not-found \
              -o jsonpath='{range .spec.rules[*]}{.host}{"\n"}{end}{range .spec.tls[*].hosts[*]}{.}{"\n"}{end}')"
            printf '%s\n' "$ingress_hosts" | grep -Fx "$PROD_HOST" >/dev/null
            if printf '%s\n' "$ingress_hosts" | grep -Fx "$TEST_HOST" >/dev/null; then
              echo "Ingress also contains test host $TEST_HOST; continuing because production host $PROD_HOST is present"
            fi
          else
            echo "Kubeconfig cannot read ingresses; relying on K8S_NAMESPACE/K8S_DEPLOYMENT scope: $K8S_NAMESPACE/$K8S_DEPLOYMENT"
          fi

          IMAGE_REF="$REGISTRY/$IMAGE:${GITHUB_SHA}"
          /tmp/kubectl --kubeconfig "$KUBECONFIG_FILE" \
            set image "deployment/$K8S_DEPLOYMENT" -n "$K8S_NAMESPACE" \
            "$K8S_CONTAINER=$IMAGE_REF"
          /tmp/kubectl --kubeconfig "$KUBECONFIG_FILE" \
            annotate "deployment/$K8S_DEPLOYMENT" -n "$K8S_NAMESPACE" \
            "hugo.luochen570.cn/git-sha=${GITHUB_SHA}" \
            "hugo.luochen570.cn/image=$IMAGE_REF" \
            --overwrite
          /tmp/kubectl --kubeconfig "$KUBECONFIG_FILE" \
            rollout status "deployment/$K8S_DEPLOYMENT" -n "$K8S_NAMESPACE" --timeout=120s