name: render-manifests

on:
  push:
    branches:
      - main
    paths:
      - 'clusters/cl01tl/helm/**'

  workflow_dispatch:

env:
  CLUSTERS: 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-helm:
    runs-on: ubuntu-js
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          path: infrastructure

      - 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

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

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

          echo ">> Checking if PR branch exists ..."
          if [[ $(git ls-remote --heads origin "${BRANCH_NAME}" | wc -l) -gt 0 ]]; then
            echo ">> Branch '${BRANCH_NAME}' exists, pulling changes ..."
            git fetch origin "${BRANCH_NAME}"
            git checkout "${BRANCH_NAME}"
            git pull --rebase

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

          echo ">> Remove manfiest files and rebuild from source ..."
          cd ${MANIFEST_DIR}/clusters
          rm -rf ./*

      - name: Add Repositories
        run: |
          cd ${MAIN_DIR}

          for cluster in ${CLUSTERS}; do
            echo ">> Adding repositories for chart dependencies of cluster $cluster ..."
            for chart_path in ${MAIN_DIR}/clusters/$cluster/helm/*; do
              helm dependency list --max-col-width 120 $chart_path 2> /dev/null \
                | tail +2 | head -n -1 \
                | awk '{ print "helm repo add " $1 " " $3 }' \
                | while read cmd; do echo "$cmd" | sh; done || true
            done
          done

      - name: Render Helm Manifests
        run: |
          cd ${MAIN_DIR}

          for cluster in ${CLUSTERS}; do
            for chart_path in ${MAIN_DIR}/clusters/$cluster/helm/*; do
              chart_name=$(basename "$chart_path")
              echo ">> Rendering chart: $chart_name"

              if [ -f "$chart_path/Chart.yaml" ]; then
                mkdir -p ${MANIFEST_DIR}/clusters/$cluster/manifests/$chart_name
                OUTPUT_FILE="${MANIFEST_DIR}/clusters/$cluster/manifests/$chart_name/$chart_name.yaml"

                cd $chart_path

                echo ""
                echo ">> Building helm dependency ..."
                helm dependency build

                echo ""
                echo ">> Linting helm ..."
                helm lint --namespace "$chart_name" --with-subcharts

                echo ""
                echo ">> Rendering templates ..."
                helm template "$chart_name" ./ --namespace "$chart_name" --include-crds > "$OUTPUT_FILE"

                echo ""
                echo ">> Manifests for $chart_name rendered to $OUTPUT_FILE"
                echo ""
              else
                echo ""
                echo ">> Directory $chart_path does not contain a Chart.yaml. Skipping ..."
                echo ""
              fi
            done
          done

      - name: Check for Changes
        id: check-changes
        run: |
          cd ${MANIFEST_DIR}

          if git status --porcelain | grep -q .; then
            echo ">> Changes detected"
            git status --porcelain
            echo "changes-detected=true" >> $GITEA_OUTPUT
          else
            echo ">> No changes detected, skipping PR creation"
            exit 0
          fi

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

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

          echo ">> Pushing changes to $REPO_URL ..."
          REPO_URL="${{ secrets.REPO_URL }}/${{ gitea.repository }}"
          git push -u "https://oauth2:${{ secrets.BOT_TOKEN }}@$(echo $REPO_URL | sed -e 's|https://||')" ${BRANCH_NAME}

          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/${BASE_BRANCH}/${HEAD_BRANCH}"

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

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

      - 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
            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"

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

      - name: Cleanup Branch
        if: failure() && steps.create-pull-request.outcome == 'failure'
        env:
          HEAD_BRANCH: ${{ steps.commit-push.outputs.HEAD_BRANCH }}
        run: |
          echo ">> Removing branch: ${HEAD_BRANCH}"
          git push origin --delete ${HEAD_BRANCH}

      - 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 ${{ secrets.NTFY_CRED }}"}'
          tags: action,successfully,completed
          details: "Manifest rendering for Infrastructure has created a new Pull Request!"
          icon: "https://cdn.jsdelivr.net/gh/selfhst/icons/png/gitea.png"
          actions: '[{"action": "view", "label": "Open Gitea", "url": "${{ 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