name: Build Images

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

env:
  REGISTRY: ghcr.io

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

    strategy:
      matrix:
        image:
          - developer
          - 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.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/host-uk/${{ matrix.image == 'developer' && 'core-dev' || matrix.image }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=raw,value=latest,enable={{is_default_branch}}

      - 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.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # ============================================================
  # Build LinuxKit Images
  # ============================================================
  linuxkit:
    name: LinuxKit (${{ matrix.image }}-${{ matrix.arch }})
    runs-on: ubuntu-latest
    needs: docker  # Needs Docker images to be built first

    strategy:
      matrix:
        image: [developer, server-php]
        arch: [amd64, arm64]
        format: [qcow2-bios, iso-bios]

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

      - name: Install Core CLI
        run: |
          # Download latest core binary
          curl -fsSL "https://github.com/host-uk/core/releases/latest/download/core-linux-amd64.tar.gz" -o core.tar.gz
          tar -xzf core.tar.gz
          sudo mv core /usr/local/bin/core
          chmod +x /usr/local/bin/core
          core --version

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

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

      - name: Build LinuxKit Image
        run: |
          mkdir -p dist
          core build --type linuxkit \
            --config ./${{ matrix.image }}/linuxkit.yml \
            --format ${{ matrix.format }} \
            --arch ${{ matrix.arch }} \
            -o ./dist/${{ matrix.image == 'developer' && 'core-dev' || matrix.image }}-${{ matrix.arch }}

      - name: Upload Artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.image == 'developer' && 'core-dev' || matrix.image }}-${{ 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 }}

  # ============================================================
  # Build TIM Bundles (when core build --type tim is ready)
  # ============================================================
  # tim:
  #   name: TIM (${{ matrix.image }})
  #   runs-on: ubuntu-latest
  #   needs: docker
  #
  #   strategy:
  #     matrix:
  #       image: [developer, server-php]
  #       os: [linux, darwin]
  #       arch: [amd64, arm64]
  #
  #   steps:
  #     - uses: actions/checkout@v4
  #
  #     - name: Install Core
  #       run: |
  #         curl -fsSL https://github.com/host-uk/core/releases/latest/download/core-linux-amd64 -o /usr/local/bin/core
  #         chmod +x /usr/local/bin/core
  #
  #     - name: Build TIM
  #       run: |
  #         core build --type tim \
  #           --borgfile ./${{ matrix.image }}/Borgfile \
  #           --os ${{ matrix.os }} \
  #           --arch ${{ matrix.arch }} \
  #           -o ./dist/${{ matrix.image }}-${{ matrix.os }}-${{ matrix.arch }}.tim
  #
  #     - name: Upload artifact
  #       uses: actions/upload-artifact@v4
  #       with:
  #         name: ${{ matrix.image }}-${{ matrix.os }}-${{ matrix.arch }}
  #         path: ./dist/*.tim