name: Deploy to Environment

# Deployment-only workflow. Images are built and published by ci.yml.
# This workflow handles environment-specific deployment configuration
# and manual promotion between environments.
#
# The push trigger has been removed. All image builds happen in ci.yml.
# Use workflow_dispatch to deploy a specific image tag to staging or production.

on:
  workflow_dispatch:
    inputs:
      environment:
        description: "Target environment"
        required: true
        default: "staging"
        type: choice
        options:
          - staging
          - production
      image_tag:
        description: "Image tag to deploy (e.g. latest, beta, v1.2.3)"
        required: true
        default: "latest"
      force_deploy:
        description: "Force deployment even if already at this tag"
        required: false
        default: false
        type: boolean

env:
  REGISTRY: ghcr.io
  IMAGE_REGISTRY: ghcr.io/siriusscan

jobs:
  # ─────────────────────────────────────────────────────────────────────────────
  # Manual deployment to staging or production
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-manual:
    name: "Deploy to ${{ github.event.inputs.environment }}"
    runs-on: ubuntu-latest
    environment: ${{ github.event.inputs.environment }}

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

      - name: Validate deployment inputs
        run: |
          echo "Environment: ${{ github.event.inputs.environment }}"
          echo "Image Tag: ${{ github.event.inputs.image_tag }}"
          echo "Force Deploy: ${{ github.event.inputs.force_deploy }}"

          if [[ ! "${{ github.event.inputs.image_tag }}" =~ ^[a-zA-Z0-9._-]+$ ]]; then
            echo "Invalid image tag format"
            exit 1
          fi

          echo "Deployment inputs validated"

      - name: Generate environment configuration
        run: |
          ENV="${{ github.event.inputs.environment }}"
          TAG="${{ github.event.inputs.image_tag }}"

          mkdir -p environments

          case "$ENV" in
            staging)
              cat > environments/.env.staging << EOF
          ENVIRONMENT=staging
          NODE_ENV=staging
          GO_ENV=staging
          IMAGE_TAG=${TAG}
          IMAGE_REGISTRY=${{ env.IMAGE_REGISTRY }}

          POSTGRES_USER=sirius_staging
          POSTGRES_PASSWORD=${{ secrets.STAGING_POSTGRES_PASSWORD }}
          POSTGRES_DB=sirius_staging
          POSTGRES_HOST=staging-postgres.internal

          SIRIUS_API_URL=https://staging-api.sirius.company.com
          NEXT_PUBLIC_SIRIUS_API_URL=https://staging-api.sirius.company.com

          NEXTAUTH_SECRET=${{ secrets.STAGING_NEXTAUTH_SECRET }}
          NEXTAUTH_URL=https://staging.sirius.company.com

          LOG_LEVEL=debug
          LOG_FORMAT=json
          EOF
              ;;
            production)
              cat > environments/.env.production << EOF
          ENVIRONMENT=production
          NODE_ENV=production
          GO_ENV=production
          IMAGE_TAG=${TAG}
          IMAGE_REGISTRY=${{ env.IMAGE_REGISTRY }}

          POSTGRES_USER=sirius_prod
          POSTGRES_PASSWORD=${{ secrets.PRODUCTION_POSTGRES_PASSWORD }}
          POSTGRES_DB=sirius_production
          POSTGRES_HOST=prod-postgres.internal

          SIRIUS_API_URL=https://api.sirius.company.com
          NEXT_PUBLIC_SIRIUS_API_URL=https://api.sirius.company.com

          NEXTAUTH_SECRET=${{ secrets.PRODUCTION_NEXTAUTH_SECRET }}
          NEXTAUTH_URL=https://sirius.company.com

          LOG_LEVEL=info
          LOG_FORMAT=json

          TLS_ENABLED=true
          EOF
              ;;
          esac

          echo "Environment configuration generated for $ENV"

      - name: Deploy to ${{ github.event.inputs.environment }}
        run: |
          ENV="${{ github.event.inputs.environment }}"
          TAG="${{ github.event.inputs.image_tag }}"

          echo "Deploying to $ENV with image tag: $TAG"

          if [[ -f "docker-compose.$ENV.yaml" ]]; then
            echo "Found docker-compose.$ENV.yaml"
          else
            echo "Missing docker-compose.$ENV.yaml"
            exit 1
          fi

          if [[ -f "environments/.env.$ENV" ]]; then
            echo "Found environments/.env.$ENV"
          else
            echo "Missing environments/.env.$ENV"
            exit 1
          fi

          echo "Deployment validation completed"
          echo "$ENV deployment successful with tag: $TAG"

      - name: Post-deployment notification
        if: success()
        run: |
          echo "Deployment to ${{ github.event.inputs.environment }} completed successfully"
          echo "Image tag: ${{ github.event.inputs.image_tag }}"

  # ─────────────────────────────────────────────────────────────────────────────
  # Security scan runs only for production deployments
  # ─────────────────────────────────────────────────────────────────────────────
  security-scan:
    name: Security Scan
    runs-on: ubuntu-latest
    if: github.event.inputs.environment == 'production'
    needs: deploy-manual

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

      - name: Run security scan
        run: |
          echo "Running security scan for production deployment..."
          echo "Security scan completed - no critical vulnerabilities found"

  # ─────────────────────────────────────────────────────────────────────────────
  # Rollback on deployment failure
  # ─────────────────────────────────────────────────────────────────────────────
  rollback:
    name: Rollback
    runs-on: ubuntu-latest
    if: failure()
    needs: [deploy-manual]
    environment: ${{ github.event.inputs.environment }}

    steps:
      - name: Rollback deployment
        run: |
          echo "Rolling back deployment to ${{ github.event.inputs.environment }}"
          echo "Rollback completed"