name: Build Docker Image

on:
  workflow_dispatch:
  push:
    branches:
      - main
    tags:
      - "v*"

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  IMAGE: ${{ github.repository }}
  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

jobs:
  mode:
    runs-on: ubuntu-latest

    outputs:
      nightly: ${{ steps.mode.outputs.nightly }}
      release: ${{ steps.mode.outputs.release }}
      matrix: ${{ steps.mode.outputs.matrix }}

    steps:
      - name: Determine publishing mode
        id: mode
        run: |
          if [[ "${{ github.event_name }}" == "push" && "${{ github.ref }}" == "refs/heads/main" ]]; then
            echo "nightly=true" >> "$GITHUB_OUTPUT"
            echo "release=false" >> "$GITHUB_OUTPUT"
            echo 'matrix={"include":[{"platform":"linux/amd64","runner":"ubuntu-latest","arch":"amd64"}]}' >> "$GITHUB_OUTPUT"
          else
            echo "nightly=false" >> "$GITHUB_OUTPUT"
            echo "release=true" >> "$GITHUB_OUTPUT"
            echo 'matrix={"include":[{"platform":"linux/amd64","runner":"ubuntu-latest","arch":"amd64"},{"platform":"linux/arm64","runner":"ubuntu-24.04-arm","arch":"arm64"}]}' >> "$GITHUB_OUTPUT"
          fi

  build:
    needs: mode

    strategy:
      fail-fast: false
      matrix: ${{ fromJSON(needs.mode.outputs.matrix) }}

    runs-on: ${{ matrix.runner }}
    timeout-minutes: 30

    permissions:
      contents: read
      packages: write
      id-token: write
      attestations: write

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v6

      - name: Get version from package.json
        id: version
        run: echo "version=$(jq -r .version package.json)" >> "$GITHUB_OUTPUT"

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Login to Docker Hub
        uses: docker/login-action@v4
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: |
            ghcr.io/${{ env.IMAGE }}
            docker.io/${{ env.IMAGE }}
          tags: |
            type=sha,prefix=sha-,suffix=-${{ matrix.arch }}

      - name: Build and Push by Digest
        id: build
        uses: docker/build-push-action@v7
        with:
          context: .
          sbom: true
          push: true
          provenance: mode=max
          platforms: ${{ matrix.platform }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=gha,scope=${{ env.IMAGE }}-${{ matrix.arch }}
          cache-to: type=gha,mode=max,scope=${{ env.IMAGE }}-${{ matrix.arch }}

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v7
        with:
          name: digests-${{ matrix.arch }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    needs:
      - mode
      - build
    timeout-minutes: 30
    runs-on: ubuntu-latest

    permissions:
      contents: read
      packages: write
      id-token: write
      attestations: write

    steps:
      - name: Checkout Repository
        uses: actions/checkout@v6
        with:
          sparse-checkout: package.json
          sparse-checkout-cone-mode: false

      - name: Get version from package.json
        id: version
        run: echo "version=$(jq -r .version package.json)" >> "$GITHUB_OUTPUT"

      - name: Download digests
        uses: actions/download-artifact@v8
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Login to Docker Hub
        uses: docker/login-action@v4
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Parse version components
        id: semver
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          MAJOR=$(echo "$VERSION" | cut -d. -f1)
          MINOR=$(echo "$VERSION" | cut -d. -f2)

          echo "major=$MAJOR" >> "$GITHUB_OUTPUT"
          echo "minor=$MINOR" >> "$GITHUB_OUTPUT"

      - name: Extract metadata for Docker
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: |
            ghcr.io/${{ env.IMAGE }}
            docker.io/${{ env.IMAGE }}
          tags: |
            type=sha,prefix=sha-
            type=raw,value=nightly,enable=${{ needs.mode.outputs.nightly == 'true' }}
            type=raw,value=nightly-{{date 'YYYYMMDDHHmmss' tz='UTC'}},enable=${{ needs.mode.outputs.nightly == 'true' }}
            type=raw,value=latest,enable=${{ needs.mode.outputs.release == 'true' }}
            type=raw,value=v${{ steps.version.outputs.version }},enable=${{ needs.mode.outputs.release == 'true' }}
            type=raw,value=v${{ steps.semver.outputs.major }}.${{ steps.semver.outputs.minor }},enable=${{ needs.mode.outputs.release == 'true' }}
            type=raw,value=v${{ steps.semver.outputs.major }},enable=${{ needs.mode.outputs.release == 'true' }}

      - name: Create manifest list and push
        id: manifest
        working-directory: /tmp/digests
        run: |
          set -euo pipefail

          if [[ "${{ needs.mode.outputs.nightly }}" == "true" ]]; then
            FINAL_TAG="nightly"
          else
            FINAL_TAG="v${{ steps.version.outputs.version }}"
          fi

          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            --annotation "index:org.opencontainers.image.licenses=MIT" \
            --annotation "index:org.opencontainers.image.title=Reactive Resume" \
            --annotation "index:org.opencontainers.image.description=A free and open-source resume builder." \
            --annotation "index:org.opencontainers.image.vendor=Amruth Pillai" \
            --annotation "index:org.opencontainers.image.url=https://rxresu.me" \
            --annotation "index:org.opencontainers.image.documentation=https://docs.rxresu.me" \
            --annotation "index:org.opencontainers.image.source=https://github.com/amruthpillai/reactive-resume" \
            --annotation "index:org.opencontainers.image.version=${{ steps.version.outputs.version }}" \
            $(printf 'ghcr.io/${{ env.IMAGE }}@sha256:%s ' *) \
            $(printf 'docker.io/${{ env.IMAGE }}@sha256:%s ' *)

          # Get the digest of the multi-arch manifest
          GHCR_DIGEST=$(docker buildx imagetools inspect ghcr.io/${{ env.IMAGE }}:${FINAL_TAG} --format '{{json .Manifest.Digest}}' | tr -d '"')
          DOCKER_DIGEST=$(docker buildx imagetools inspect docker.io/${{ env.IMAGE }}:${FINAL_TAG} --format '{{json .Manifest.Digest}}' | tr -d '"')
          echo "final_tag=$FINAL_TAG" >> "$GITHUB_OUTPUT"
          echo "ghcr_digest=$GHCR_DIGEST" >> "$GITHUB_OUTPUT"
          echo "docker_digest=$DOCKER_DIGEST" >> "$GITHUB_OUTPUT"

      - name: Install Cosign
        uses: sigstore/cosign-installer@v3

      - name: Sign images with Cosign
        run: |
          # Sign GHCR image
          cosign sign --yes ghcr.io/${{ env.IMAGE }}@${{ steps.manifest.outputs.ghcr_digest }}

          # Sign Docker Hub image
          cosign sign --yes docker.io/${{ env.IMAGE }}@${{ steps.manifest.outputs.docker_digest }}

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ghcr.io/${{ env.IMAGE }}:${{ steps.manifest.outputs.final_tag }}
          docker buildx imagetools inspect docker.io/${{ env.IMAGE }}:${{ steps.manifest.outputs.final_tag }}

      - name: Redeploy Stack
        if: ${{ needs.mode.outputs.release == 'true' }}
        uses: appleboy/ssh-action@v1
        with:
          key: ${{ secrets.SSH_KEY }}
          host: ${{ secrets.SSH_HOST }}
          username: ${{ secrets.SSH_USER }}
          script: |
            cd docker
            ./manage_stack.sh up reactive_resume

      - name: Purge Cloudflare cache
        if: ${{ needs.mode.outputs.release == 'true' }}
        env:
          CLOUDFLARE_ZONE_ID: ${{ secrets.CLOUDFLARE_ZONE_ID }}
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
        run: |
          set -euo pipefail

          response=$(curl -fsS --max-time 10 --retry 3 --retry-delay 5 --retry-connrefused -X POST \
            "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/purge_cache" \
            -H "Authorization: Bearer ${CLOUDFLARE_API_TOKEN}" \
            -H "Content-Type: application/json" \
            --data '{"purge_everything":true}')

          if [ "$(jq -r '.success' <<< "$response")" != "true" ]; then
            echo "$response" | jq .
            exit 1
          fi

          echo "Cloudflare cache purged successfully."
