name: Build and Publish Docker Image (Semantic Cache)

# Builds the :semantic variant that includes sentence-transformers + CPU torch
# and the pre-baked all-MiniLM-L6-v2 embedding model (~500 MB larger than lean).
# Tags mirror the lean workflow but carry a -semantic suffix, e.g.:
#   bitfreedom.net/nomyo-ai/nomyo-router:latest-semantic
#   bitfreedom.net/nomyo-ai/nomyo-router:0.7.0-semantic
#   bitfreedom.net/nomyo-ai/nomyo-router:0.7-semantic

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

env:
  REGISTRY: bitfreedom.net
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ${{ matrix.runner }}
    container:
      image: node:lts-bookworm
      options: --privileged
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: docker-amd64
          - platform: linux/arm64
            runner: docker-arm64

    steps:
      - name: Install Docker
        run: |
          apt-get update -qq
          apt-get install -y -qq docker.io

      - name: Start Docker daemon
        run: |
          dockerd --host=unix:///var/run/docker.sock --iptables=false --dns=8.8.8.8 --dns=8.8.4.4 > /tmp/dockerd.log 2>&1 &
          for i in $(seq 1 30); do
            sleep 2
            docker info > /dev/null 2>&1 && echo "Docker daemon ready" && exit 0
            echo "Waiting for Docker daemon... ($i/30)"
          done
          echo "=== dockerd failed to start, logs: ==="
          cat /tmp/dockerd.log
          exit 1

      - name: Checkout repository
        run: |
          git clone --depth=1 --branch "${{ github.ref_name }}" \
            "https://oauth2:${{ github.token }}@bitfreedom.net/code/${{ github.repository }}.git" \
            .

      - name: Set up Docker Buildx
        uses: https://github.com/docker/setup-buildx-action@v3
        with:
          driver-opts: network=host

      - name: Log in to Forgejo Container Registry
        uses: https://github.com/docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Build and push platform image
        id: build
        uses: https://github.com/docker/build-push-action@v6
        with:
          context: .
          platforms: ${{ matrix.platform }}
          push: true
          provenance: false
          build-args: |
            SEMANTIC_CACHE=true
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-semantic-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-semantic-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-semantic-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }},mode=max

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

      - name: Upload digest
        uses: https://github.com/actions/upload-artifact@v4
        with:
          name: digest-semantic-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  merge:
    runs-on: docker-amd64
    needs: build
    permissions:
      contents: read
      packages: write
    steps:
      - name: Download digests
        uses: https://github.com/actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digest-semantic-*
          merge-multiple: true

      - name: Install Docker
        run: |
          apt-get update -qq
          apt-get install -y -qq docker.io

      - name: Set up Docker Buildx
        uses: https://github.com/docker/setup-buildx-action@v3

      - name: Log in to Forgejo Container Registry
        uses: https://github.com/docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: https://github.com/docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern={{version}}-semantic
            type=semver,pattern={{major}}.{{minor}}-semantic
            type=raw,value=latest-semantic,enable=${{ github.ref == 'refs/heads/main' }}
            type=sha,prefix=sha-,suffix=-semantic

      - name: Create and push multi-arch manifest
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)