name: CI/CD Pipeline

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  build:
    runs-on: home-server

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

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: test
        run: |
          cd backend
          nix-shell -p elixir elixir-ls --run '
            MIX_ENV=test mix deps.get --only test
            MIX_ENV=test mix test
          '

      - name: Build and push backend image
        run: |
          cd client
            docker build -t alexmickelson/elixir-demo-frontend:$GITHUB_RUN_NUMBER .
            docker push alexmickelson/elixir-demo-frontend:$GITHUB_RUN_NUMBER
          cd ../backend
            docker build -t alexmickelson/elixir-demo-backend:$GITHUB_RUN_NUMBER .
            docker push alexmickelson/elixir-demo-backend:$GITHUB_RUN_NUMBER

      - name: Deploy to Kubernetes
        env:
          KUBECONFIG_CONTENT: ${{ secrets.KUBE_CONFIG_FILE }}
        run: |
          echo "$KUBECONFIG_CONTENT" > /tmp/elixir-kubeconfig.yml
          export KUBECONFIG=/tmp/elixir-kubeconfig.yml

          kubectl apply -f kubernetes/namespace.yml
          kubectl get secret backend-secret --namespace alex-elixir-demo || \
            kubectl create secret generic backend-secret \
              --namespace alex-elixir-demo \
              --from-literal=cookie=$(openssl rand -hex 32)

          for file in kubernetes/*.yml; do
            cat "$file" | envsubst | kubectl apply -f -
          done