name: Alpine Package Auto-Rebuild

on:
  workflow_dispatch:
  schedule:
    - cron: '0 1 * * *'

jobs:
  build:
    runs-on: dind

    steps:
      - name: Install dependencies for other steps
        shell: sh
        run: |
          apk add --no-cache git nodejs npm bash sed curl

      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Check for latest package version
        id: check
        shell: sh
        run: |
          PACKAGE="curl"
          LATEST=$(apk policy "$PACKAGE" | awk '/^[[:space:]]*[0-9]/ { gsub(":", "", $1); print $1; exit }')
          echo "Extracted version: $LATEST"
          echo "LATEST_VERSION=$LATEST" >> $GITHUB_ENV
          echo "latest_version=$LATEST" >> $GITHUB_OUTPUT

      - name: Compare with last known version
        shell: sh
        run: |
          FILE=".last_version"
          [ -f "$FILE" ] && LAST=$(cat "$FILE") || LAST="none"
          echo "Last known version: $LAST"
          echo "Current version: $LATEST_VERSION"
          if [ "$LAST" != "$LATEST_VERSION" ]; then
            echo "UPDATE=true" >> $GITHUB_ENV
          else
            echo "UPDATE=false" >> $GITHUB_ENV
          fi

          FILE=".last_rebuild"
          [ -f "$FILE" ] && LAST=$(cat "$FILE") || LAST="0"
          echo "Last rebuild: $LAST"
          [ $(( $(date +%s)/86400 - $LAST )) -gt 3 ] && echo "UPDATE=true" >> $GITHUB_ENV

      - name: Start dockerd
        if: env.UPDATE == 'true'
        shell: sh
        run: |
          dockerd-entrypoint.sh &
          timeout=30
          while ! docker info >/dev/null 2>&1; do
            if [ $timeout -le 0 ]; then
              echo "Docker daemon failed to start."
              exit 1
            fi
            echo "Waiting for Docker daemon..."
            sleep 3
            timeout=$((timeout - 3))
          done

      - name: Build and push Docker image
        if: env.UPDATE == 'true'
        shell: sh
        run: |
          docker build -t git.shork.ch/melody/docker-test:latest -t git.shork.ch/melody/docker-test:$LATEST_VERSION .
          echo "${{ secrets.DOCKER_PASSWORD }}" | docker login git.shork.ch -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
          docker push git.shork.ch/melody/docker-test:latest
          echo "$LATEST_VERSION" > .last_version
          echo $(( $(date +%s) / 86400 )) > .last_rebuild

      - name: Commit updated version file
        if: env.UPDATE == 'true'
        shell: sh
        run: |
          git config user.name "forgejo-runner"
          git config user.email "runner@forgejo.local"
          git add .last_version
          git commit -m "Update tracked version to $LATEST_VERSION"
          git push