# Host UK Container Images
#
# Dev branch:  ghcr.io/host-uk/{core-dev,server-php}:dev
# Tags/Main:   ghcr.io/host-uk/{core-dev,server-php}:latest + lthn/{core-dev,server-php}:latest

name: Build Images

on:
  push:
    branches: [dev, main]
    tags: ['v*']
  pull_request:
    branches: [dev, main]
  workflow_dispatch:

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

env:
  GHCR_REGISTRY: ghcr.io

jobs:
  # ============================================================
  # Build Docker Images
  # ============================================================
  docker:
    name: Docker (${{ matrix.image }})
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    strategy:
      fail-fast: false
      matrix:
        image:
          - developer
          - server-php
        include:
          - image: developer
            ghcr_name: core-dev
            dockerhub_name: core-dev
          - image: server-php
            ghcr_name: server-php
            dockerhub_name: server-php

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.GHCR_REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Login to Docker Hub
        if: github.event_name != 'pull_request' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v'))
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Determine if release build
        id: release
        run: |
          if [[ "${{ github.ref }}" == "refs/heads/main" ]] || [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            echo "is_release=true" >> $GITHUB_OUTPUT
          else
            echo "is_release=false" >> $GITHUB_OUTPUT
          fi

      - name: Extract metadata (GHCR only - dev builds)
        if: steps.release.outputs.is_release == 'false'
        id: meta-dev
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.GHCR_REGISTRY }}/host-uk/${{ matrix.ghcr_name }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
          flavor: |
            latest=false

      - name: Extract metadata (GHCR + Docker Hub - release builds)
        if: steps.release.outputs.is_release == 'true'
        id: meta-release
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.GHCR_REGISTRY }}/host-uk/${{ matrix.ghcr_name }}
            lthn/${{ matrix.dockerhub_name }}
          tags: |
            # main branch -> latest
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
            # Semver tags (v1.0.0 -> 1.0.0, 1.0, 1, latest)
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }}
            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/v') }}
          flavor: |
            latest=false

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: ./${{ matrix.image }}
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta-dev.outputs.tags || steps.meta-release.outputs.tags }}
          labels: ${{ steps.meta-dev.outputs.labels || steps.meta-release.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # ============================================================
  # Build LinuxKit Images (only on tags)
  # ============================================================
  linuxkit:
    name: LinuxKit (${{ matrix.image }}-${{ matrix.arch }})
    runs-on: ubuntu-latest
    needs: docker
    if: startsWith(github.ref, 'refs/tags/v')

    strategy:
      fail-fast: false
      matrix:
        image: [developer, server-php]
        arch: [amd64, arm64]
        format: [qcow2-bios, iso-bios]
        include:
          - image: developer
            output_name: core-dev
          - image: server-php
            output_name: server-php

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install LinuxKit
        run: |
          curl -fsSL "https://github.com/linuxkit/linuxkit/releases/download/v1.5.3/linuxkit-linux-amd64" -o linuxkit
          chmod +x linuxkit
          sudo mv linuxkit /usr/local/bin/

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Login to GHCR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.GHCR_REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build LinuxKit Image
        run: |
          mkdir -p dist
          linuxkit build \
            --format ${{ matrix.format }} \
            --name ./dist/${{ matrix.output_name }}-${{ matrix.arch }} \
            ./${{ matrix.image }}/linuxkit.yml

      - name: Upload Artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.output_name }}-${{ matrix.arch }}-${{ matrix.format }}
          path: ./dist/*

  # ============================================================
  # Release LinuxKit Images
  # ============================================================
  release-linuxkit:
    name: Release LinuxKit Images
    runs-on: ubuntu-latest
    needs: linuxkit
    if: startsWith(github.ref, 'refs/tags/v')
    permissions:
      contents: write

    steps:
      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: ./dist
          merge-multiple: true

      - name: Generate checksums
        run: |
          cd dist
          sha256sum * > checksums.txt

      - name: Upload to Release
        uses: softprops/action-gh-release@v1
        with:
          files: |
            dist/*
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}