---
name: Test docker containers

on:
  pull_request:

jobs:
  diff:
    name: Check if Dockerfile changed
    runs-on: ubuntu-latest
    outputs:
      did_change: ${{ steps.diff.outputs.any_changed }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Check for changes
        id: diff
        run: |
          if [[ $(git diff --name-only "origin/${GITHUB_BASE_REF}" -- Dockerfile | wc -l) -gt 0 ]]; then
            echo "any_changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "any_changed=false" >> "$GITHUB_OUTPUT"
          fi

  build:
    needs: [diff]
    if: ${{ needs.diff.outputs.did_change == 'true' }}
    name: Build
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        platform: [linux/amd64, linux/arm64/v8, linux/arm/v7]
        dockerfile: [Dockerfile]
    steps:
      - name: Set env
        run: echo "mount_dir=$(mktemp -d)" >> $GITHUB_ENV

      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
        with:
          install: true

      - name: Build Docker image
        run: docker build --platform ${{ matrix.platform }} --load -t thelounge -f ${{ matrix.dockerfile }} .

      - name: Start Docker container
        run: docker run --platform ${{ matrix.platform }} --user "$UID" -v "${mount_dir}:/var/opt/thelounge" -d -p 9001:9000 --name thelounge thelounge

      - name: Check TheLounge version
        run: docker exec thelounge thelounge --version | grep --color=never -E "^v[0-9]\.[0-9]\.[0-9]" | cut -c 2- | grep -f /dev/stdin ${{ matrix.dockerfile }}

      - name: Check HTML output
        run: |
          # Retry Wait for server to start.
          for i in {1..10}; do
            (curl -sL localhost:9001 | grep "<title>The Lounge</title>") && s=0 && break || s=$? && sleep 1;
          done
          exit $s

      - name: Check for no ERROR logs
        run: docker logs thelounge 2>&1 | grep -vz "\[ERROR\]"

      - name: Check for config.js to be created in the mounted host system directory
        run: stat "${mount_dir}/config.js"

      - name: Container context
        if: always()
        run: docker exec thelounge uname -a

      - name: Logs
        if: always()
        run: docker logs thelounge

  # This job is used for branch protection rule
  build-check:
    name: Build check
    runs-on: ubuntu-latest
    needs: build
    if: 'failure() || cancelled()'
    steps:
      - run: exit 1