name: Build, Push, and Blue/Green Deploy to Nomad

on:
  push:
    branches:
      - main

jobs:
  docker-nomad:
    runs-on: self-hosted
    steps:
      - name: Check out code
        uses: actions/checkout@v3

      - name: Log in to Container Registry
        run: echo ${{ secrets.password }} | docker login registry.i80.dk -u ${{ secrets.username }} --password-stdin

      - name: Build Docker Image
        run: |
          COMMIT_HASH=$(git rev-parse --short HEAD)
          docker build -t registry.i80.dk/gitea/lifefaq:latest -t registry.i80.dk/gitea/lifefaq:${COMMIT_HASH} .

      - name: Push Docker Image
        run: |
          COMMIT_HASH=$(git rev-parse --short HEAD)
          docker push registry.i80.dk/gitea/lifefaq:${COMMIT_HASH}
          docker push registry.i80.dk/gitea/lifefaq:latest

      - name: Deploy Green Version to Nomad
        env:
          NOMAD_ADDR: https://nomad.i80.dk
        run: |
          COMMIT_HASH=$(git rev-parse --short HEAD)
          echo "Deploying green version with tag: ${COMMIT_HASH}"
          sed "s/\${TAG}/${COMMIT_HASH}/" .gitea/workflows/nomad-job.hcl > nomad-green-job.hcl
          nomad job run nomad-green-job.hcl

      - name: Update Nginx to Route Traffic to Green Deployment
        run: |
          echo "Updating NGINX to point to the green deployment"
          ssh runner@nomad sudo /opt/nginx_updater/venv/bin/python3 /opt/nginx_updater/nginx_updater.py lifefaq-green

      - name: Validate Green Deployment
        env:
          NOMAD_ADDR: https://nomad.i80.dk
        run: |
          echo "Waiting 30 seconds for green deployment to stabilize..."
          sleep 30
          echo "Validating green deployment health..."
          # Add your health check logic here, e.g., HTTP checks, logs, etc.
          curl -f https://lifefaq-green.i80.dk/health || exit 1

      - name: Stop Blue Deployment
        env:
          NOMAD_ADDR: https://nomad.i80.dk
        run: |
          echo "Stopping the old blue deployment"
          nomad job stop -purge -no-shutdown-delay lifefaq-blue

      - name: Promote Green Deployment to Blue
        run: |
          echo "Promoting green to blue by renaming..."
          ssh runner@nomad sudo /opt/nginx_updater/venv/bin/python3 /opt/nginx_updater/nginx_updater.py lifefaq-blue
          nomad job dispatch lifefaq-green lifefaq-blue

      - name: Clean Up Green Deployment (Optional)
        env:
          NOMAD_ADDR: https://nomad.i80.dk
        run: |
          echo "Cleaning up green deployment..."
          nomad job stop lifefaq-green