name: render-manifests-dispatch

on:
  schedule:
    - cron: '0 15 * * *'

  workflow_dispatch:

env:
  CLUSTER: cl01tl
  BASE_BRANCH: manifests
  BRANCH_NAME: auto/update-manifests
  ASSIGNEE: alexlebens
  MAIN_DIR: /workspace/alexlebens/infrastructure/infrastructure
  MANIFEST_DIR: /workspace/alexlebens/infrastructure/infrastructure-manifests

jobs:
  render-manifests-dispatch:
    runs-on: ubuntu-js
    steps:
      - name: Checkout Main
        uses: actions/checkout@v6
        with:
          path: infrastructure
          fetch-depth: 0

      - name: Checkout Manifests
        uses: actions/checkout@v6
        with:
          ref: manifests
          path: infrastructure-manifests

      - name: Set up Helm
        uses: azure/setup-helm@v4
        with:
          token: ${{ secrets.GITEA_TOKEN }}
          version: v3.17.2 # Pending https://github.com/helm/helm/pull/30743
          cache: true

      - name: Configure Kubeconfig
        uses: azure/k8s-set-context@v4
        with:
          method: kubeconfig
          kubeconfig: ${{ secrets.KUBECONFIG }}

      - name: Cache Helm Dependencies
        uses: actions/cache@v5
        with:
          path: |
            ~/.cache/helm
            ~/.config/helm
          key: helm-cache-${{ runner.os }}-${{ hashFiles('infrastructure/clusters/cl01tl/helm/**/Chart.yaml', 'infrastructure/clusters/cl01tl/helm/**/Chart.lock') }}
          restore-keys: |
            helm-cache-${{ runner.os }}-

      - name: Prepare Manifest Branch
        run: |
          cd "${MANIFEST_DIR}"

          echo ""
          echo ">> Configure git to use gitea-bot as user ..."
          git config user.name "gitea-bot"
          git config user.email "gitea-bot@alexlebens.net"

          echo ""
          echo ">> Checking if PR branch exists ..."
          if git ls-remote --exit-code --heads origin "${BRANCH_NAME}" > /dev/null 2>&1; then
            echo ""
            echo ">> Branch '${BRANCH_NAME}' exists, pulling changes ..."
            git fetch origin "${BRANCH_NAME}"
            git checkout "${BRANCH_NAME}"
            git pull --rebase

          else
            echo ""
            echo ">> Branch '${BRANCH_NAME}' does not exist, creating ..."
            git checkout -b "${BRANCH_NAME}"

          fi

          echo "----"

      - name: Check which Directories have Changes
        id: check-dir-changes
        run: |
          cd "${MAIN_DIR}"

          echo ""
          echo ">> Triggered on dispatch, will check all paths ..."

          # Extract names of charts
          RENDER_DIR=$(find "clusters/${CLUSTER}/helm" -mindepth 1 -maxdepth 1 -type d -exec basename {} \; | sort -u)

          if [ -n "${RENDER_DIR}" ]; then
            echo ""
            echo ">> Directories to Render:"
            echo "${RENDER_DIR}"
            echo "----"

            echo "changes-detected=true" >> "$GITEA_OUTPUT"
            echo "render-dir<<EOF" >> "$GITEA_OUTPUT"
            echo "${RENDER_DIR}" >> "$GITEA_OUTPUT"
            echo "EOF" >> "$GITEA_OUTPUT"

          else
            echo ">> No directories found"
            echo "changes-detected=false" >> "$GITEA_OUTPUT"

          fi

      - name: Add Repositories
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          RENDER_DIR: ${{ steps.check-dir-changes.outputs.render-dir }}
        run: |
          cd "${MAIN_DIR}"

          echo ""
          echo ">> Adding repositories for chart dependencies ..."
          for DIR in ${RENDER_DIR}; do
            helm dependency list --max-col-width 120 "${MAIN_DIR}/clusters/${CLUSTER}/helm/${DIR}" 2> /dev/null \
              | tail -n +2 \
              | awk 'NF > 0 { print $1, $3 }' \
              | while read -r REPO_NAME REPO_URL; do
                if [[ "${REPO_URL}" == oci://* ]]; then
                  echo ""
                  echo ">> Ignoring OCI repo: ${REPO_URL}"

                elif [[ -n "${REPO_NAME}" && -n "${REPO_URL}" ]]; then
                  helm repo add "${REPO_NAME}" "${REPO_URL}"

                fi
              done || true
          done

          if helm repo list > /dev/null 2>&1; then
            echo ""
            echo ">> Update repository cache ..."
            helm repo update

          fi

          echo "----"

      - name: Remove Changed Manifest Files
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          RENDER_DIR: ${{ steps.check-dir-changes.outputs.render-dir }}
        run: |
          cd "${MANIFEST_DIR}"

          echo ""
          echo ">> Remove manfiest files and rebuild from source ..."

          for DIR in ${RENDER_DIR}; do
            CHART_PATH=${MANIFEST_DIR}/clusters/${CLUSTER}/manifests/${DIR}

            echo "${CHART_PATH}"
            rm -rf ${CHART_PATH}/*
          done

          echo "----"

      - name: Render Helm Manifests
        id: render-manifests
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        env:
          RENDER_DIR: ${{ steps.check-dir-changes.outputs.render-dir }}
        run: |
          cd ${MAIN_DIR}

          echo ""
          echo ">> Rendering Manifests ..."

          render_chart() {
            local DIR="$1"
            local CHART_PATH="${MAIN_DIR}/clusters/${CLUSTER}/helm/${DIR}"
            local CHART_NAME=$(basename "${CHART_PATH}")

            echo ""
            echo ">> Rendering ..."
            echo ">> Chart: ${CHART_NAME}"
            echo ">> Path: ${CHART_PATH}"

            if [ -f "${CHART_PATH}/Chart.yaml" ]; then
              local OUTPUT_FOLDER="${MANIFEST_DIR}/clusters/${CLUSTER}/manifests/${CHART_NAME}/"

              mkdir -p "${OUTPUT_FOLDER}"
              cd "${CHART_PATH}"

              echo ""
              echo ">> Updating helm dependencies ..."
              helm dependency update --skip-refresh > /dev/null

              echo ""
              echo ">> Linting helm chart ..."
              helm lint --namespace "${CHART_NAME}" --quiet

              local NAMESPACE="${CHART_NAME}"
              case "${CHART_NAME}" in
                "stack")
                  NAMESPACE="argocd"
                  echo ""
                  echo ">> Special Rendering into 'argocd' namespace ..."
                  ;;
                "cilium" | "coredns" | "metrics-server" | "prometheus-operator-crds")
                  NAMESPACE="kube-system"
                  echo ""
                  echo ">> Special Rendering for ${CHART_NAME} into 'kube-system' namespace ..."
                  ;;
                *)
                  echo ""
                  echo ">> Standard Rendering for ${CHART_NAME} ..."
              esac

              echo ""
              echo ">> Formating rendered template ..."
              local TEMPLATE
              TEMPLATE=$(helm template "${CHART_NAME}" ./ --namespace "${NAMESPACE}" --include-crds --dry-run=server --api-versions "gateway.networking.k8s.io/v1/HTTPRoute")

              # Format and split rendered template
              echo "${TEMPLATE}" | yq '... comments=""' | yq 'select(. != null)' | yq -s '"'"${OUTPUT_FOLDER}"'" + .kind + "-" + .metadata.name + ".yaml"'

              # Strip comments again to ensure formatting correctness
              for file in "$OUTPUT_FOLDER"/*; do
                yq -i '... comments=""' $file
              done

              echo ""
              echo ">> Manifests for ${CHART_NAME} rendered to ${OUTPUT_FOLDER}:"
              ls $OUTPUT_FOLDER
              echo ""
            else
              echo ""
              echo ">> Directory ${CHART_PATH} does not contain a Chart.yaml. Skipping ..."
              echo ""
            fi
          }

          export -f render_chart
          export MAIN_DIR CLUSTER MANIFEST_DIR

          # Run rendering in parallel
          for DIR in ${RENDER_DIR}; do
            echo "${DIR}"
          done | xargs -n 1 -P 4 -I {} bash -c 'render_chart "$@"' _ {}

          echo "----"

      - name: Check for Changes
        id: check-changes
        if: steps.check-dir-changes.outputs.changes-detected == 'true'
        run: |
          cd "${MANIFEST_DIR}"

          GIT_CHANGES=$(git status --porcelain)

          if [ -n "${GIT_CHANGES}" ]; then
            echo ""
            echo ">> Changes detected"
            git status --porcelain
            echo "changes-detected=true" >> $GITEA_OUTPUT

          else
            echo ""
            echo ">> No changes detected, skipping PR creation"

          fi

          echo "----"

      - name: Commit and Push Changes
        id: commit-push
        if: steps.check-changes.outputs.changes-detected == 'true'
        run: |
          cd "${MANIFEST_DIR}"

          echo ""
          echo ">> Commiting changes to ${BRANCH_NAME} ..."
          git add .
          git commit -m "chore: Update manifests after change"

          REPO_URL="${{ secrets.REPO_URL }}/${{ gitea.repository }}"
          echo ""
          echo ">> Pushing changes to ${REPO_URL} ..."

          git push -u "https://oauth2:${{ secrets.BOT_TOKEN }}@${REPO_URL#*://}" "${BRANCH_NAME}"

          echo "----"

          echo "HEAD_BRANCH=${BRANCH_NAME}" >> "$GITEA_OUTPUT"
          echo "push=true" >> "$GITEA_OUTPUT"

      - name: Check for Pull Request
        id: check-for-pull-requst
        if: steps.commit-push.outputs.push == 'true'
        env:
          GITEA_TOKEN: ${{ secrets.BOT_TOKEN }}
          GITEA_URL: ${{ secrets.REPO_URL }}
          HEAD_BRANCH: ${{ steps.commit-push.outputs.HEAD_BRANCH }}
        run: |
          cd ${MANIFEST_DIR}

          API_ENDPOINT="${GITEA_URL}/api/v1/repos/${{ gitea.repository }}/pulls?base_branch=${BASE_BRANCH}&state=open&page=1"

          echo ">> Checking if PR from branch ${HEAD_BRANCH} into ${BASE_BRANCH}"
          echo ">> With Endpoint of:"
          echo "$API_ENDPOINT"

          HTTP_STATUS=$(
            curl -X GET \
              --silent \
              --write-out '%{http_code}' \
              --output response_body.json \
              --dump-header response_headers.txt \
              -H "Authorization: token ${GITEA_TOKEN}" \
              -H "Content-Type: application/json" \
              "$API_ENDPOINT" 2> response_errors.txt
          )

          echo ">> HTTP Status Code: $HTTP_STATUS"
          echo ">> Response Output ..."
          echo "----"
          cat response_body.json
          echo "----"
          cat response_headers.txt
          echo "----"
          cat response_errors.txt
          echo "----"

          if [ "$HTTP_STATUS" == "200" ] && [ "$(cat response_body.json | jq -r .[0].state)" == "open" ]; then
            echo ">> Pull Request has been found open, will update"
            PR_INDEX=$(cat response_body.json | jq -r .[0].number)
            echo "pull-request-exists=${PR_INDEX}" >> $GITEA_OUTPUT
            echo "pull-request-index=true" >> $GITEA_OUTPUT

          elif [ "$HTTP_STATUS" == "200" ] && [ "$(cat response_body.json | jq -r .[0].state)" == "closed" ]; then
            echo ">> Pull Request found, but was closed"
            echo "pull-request-exists=false" >> $GITEA_OUTPUT

          else
            echo ">> Pull Request not found"
            echo "pull-request-exists=false" >> $GITEA_OUTPUT
          fi

          echo "----"

      - name: Create Pull Request
        id: create-pull-request
        if: steps.commit-push.outputs.push == 'true' && steps.check-for-pull-requst.outputs.pull-request-exists == 'false'
        env:
          GITEA_TOKEN: ${{ secrets.BOT_TOKEN }}
          GITEA_URL: ${{ secrets.REPO_URL }}
          HEAD_BRANCH: ${{ steps.commit-push.outputs.HEAD_BRANCH }}
        run: |
          cd ${MANIFEST_DIR}

          API_ENDPOINT="${GITEA_URL}/api/v1/repos/${{ gitea.repository }}/pulls"

          PAYLOAD=$( jq -n \
            --arg head "${HEAD_BRANCH}" \
            --arg base "${BASE_BRANCH}" \
            --arg assignee "${ASSIGNEE}" \
            --arg title "Automated Manifest Update" \
            --arg body "This PR contains newly rendered Kubernetes manifests automatically generated by the CI workflow." \
            '{head: $head, base: $base, assignee: $assignee, title: $title, body: $body}' )

          echo ">> Creating PR from branch ${HEAD_BRANCH} into ${BASE_BRANCH}"
          echo ">> With Endpoint of:"
          echo "$API_ENDPOINT"
          echo ">> With Payload of:"
          echo "$PAYLOAD"

          HTTP_STATUS=$(
            curl -X POST \
              --silent \
              --write-out '%{http_code}' \
              --output response_body.json \
              --dump-header response_headers.txt \
              --data "$PAYLOAD" \
              -H "Authorization: token ${GITEA_TOKEN}" \
              -H "Content-Type: application/json" \
              "$API_ENDPOINT" 2> response_errors.txt
          )

          echo ">> HTTP Status Code: $HTTP_STATUS"
          echo ">> Response Output ..."
          echo "----"
          cat response_body.json
          echo "----"
          cat response_headers.txt
          echo "----"
          cat response_errors.txt
          echo "----"

          if [ "$HTTP_STATUS" == "201" ]; then
            echo ">> Pull Request created successfully!"
            PR_URL=$(cat response_body.json | jq -r .html_url)
            echo "pull-request-url=${PR_URL}" >> $GITEA_OUTPUT
            PR_ID=$(cat response_body.json | jq -r .id)
            echo "pull-request-id=${PR_ID}" >> $GITEA_OUTPUT
            echo "pull-request-operation=created" >> $GITEA_OUTPUT

          elif [ "$HTTP_STATUS" == "422" ]; then
            echo ">> Failed to create PR (HTTP 422: Unprocessable Entity), PR may already exist"

          elif [ "$HTTP_STATUS" == "409" ]; then
            echo ">> Failed to create PR (HTTP 409: Conflict), PR already exists"

          else
            echo ">> Failed to create PR, HTTP status code: $HTTP_STATUS"
            exit 1
          fi

          echo "----"

      - name: ntfy Created
        uses: niniyas/ntfy-action@master
        if: steps.create-pull-request.outputs.pull-request-operation == 'created'
        with:
          url: "${{ secrets.NTFY_URL }}"
          topic: "${{ secrets.NTFY_TOPIC }}"
          title: "Manifest Render PR Created - Infrastructure"
          priority: 3
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,successfully,completed
          details: "Manifest rendering for Infrastructure has created a new Pull Request with ID: ${{ steps.create-pull-request.outputs.pull-request-id }}!"
          icon: "https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png"
          actions: '[{"action": "view", "label": "Open Gitea", "url": "${{ steps.create-pull-request.outputs.pull-request-url }}", "clear": true}]'

      - name: ntfy Failed
        uses: niniyas/ntfy-action@master
        if: failure()
        with:
          url: "${{ secrets.NTFY_URL }}"
          topic: "${{ secrets.NTFY_TOPIC }}"
          title: "Manifest Render Failure - Infrastructure"
          priority: 4
          headers: '{"Authorization": "Bearer ${{ secrets.NTFY_CRED }}"}'
          tags: action,failed
          details: "Manifest rendering for Infrastructure has failed!"
          icon: "https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png"
          actions: '[{"action": "view", "label": "Open Gitea", "url": "https://gitea.alexlebens.dev/alexlebens/infrastructure/actions?workflow=render-manifests.yaml", "clear": true}]'
          image: true