name: "Pre-pull/build Docker images in parallel with timing"
description: "Prepares all services for docker compose dry-run by pulling or building them concurrently with logs"
inputs:
  services:
    description: "Space-separated list of docker-compose services"
    required: true
runs:
  using: "composite"
  steps:
    - name: Install yq (if missing)
      shell: bash
      run: |
        if ! command -v yq >/dev/null 2>&1; then
          echo "Installing yq..."
          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/download/v4.44.1/yq_linux_amd64
          sudo chmod +x /usr/local/bin/yq
        fi

    - name: Pre-pull/build images in parallel
      shell: bash
      run: |
        SERVICES="${{ inputs.services }}"
        echo "Services to process: $SERVICES"
        for svc in $SERVICES; do
          (
            echo "🔹 Starting prep for service: $svc"
            start_time=$(date +%s)

            image=$(docker compose config | yq -r ".services[\"$svc\"].image // empty")
            build_dir=$(docker compose config | yq -r ".services[\"$svc\"].build.context // empty")

            if [ -n "$image" ]; then
              echo "➡️ Pulling image: $image"
              docker pull "$image"
            elif [ -n "$build_dir" ]; then
              echo "⚙️ Building service: $svc from context: $build_dir"
              docker compose build "$svc"
            else
              echo "⚠️ No image or build context found for $svc — skipping"
            fi

            end_time=$(date +%s)
            duration=$((end_time - start_time))
            echo "✅ Finished $svc in ${duration}s"
          ) &
        done
        wait
        echo "🎯 All services processed."