name: "Pre-pull Docker Compose service images"
description: "Prepares Docker Compose services by pulling images in parallel before dry-run"
author: "Trez.One <charish.patel@trez.wtf>"

branding:
  icon: "arrow-down"
  color: "blue"

inputs:
  services:
    description: "Space-separated list of Docker Compose services"
    required: true

  compose_profile:
    description: "Docker Compose profile to use (optional)"
    required: false
    default: ""

  env_file:
    description: "Path to .env file (optional)"
    required: false
    default: ".env"

runs:
  using: "composite"
  steps:
    - name: Install yq
      shell: bash
      run: |
        if ! command -v yq >/dev/null; then
          echo "Installing yq..."
          wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
          chmod +x /usr/local/bin/yq
        fi

    - name: Pre-pull/build services
      shell: bash
      run: |
        set -euo pipefail

        SERVICES="${{ inputs.services }}"
        PROFILE="${{ inputs.compose_profile }}"
        ENV_FILE="${{ inputs.env_file }}"

        if [ -z "$SERVICES" ]; then
          echo "❌ No services provided. Exiting."
          exit 1
        fi

        echo "Services to process:"
        echo "$SERVICES"

        CONFIG_CMD="docker compose"
        if [ -n "$PROFILE" ]; then
          CONFIG_CMD="$CONFIG_CMD --profile $PROFILE"
        fi
        CONFIG_CMD="$CONFIG_CMD --env-file $ENV_FILE config"

        for svc in $SERVICES; do
        (
          echo "🔹 Starting prep for service: $svc"
          start_time=$(date +%s)

          image=$(eval $CONFIG_CMD | yq -r ".services[\"$svc\"].image // \"\"")

          if [ -n "$image" ] && [ "$image" != "null" ]; then
            echo "➡️ Pulling image for $svc: $image"
            if ! docker pull "$image"; then
              echo "⚠️ Failed to pull image $image for service $svc"
            fi
          else
            echo "⚠️ No image defined 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."