name: Build & Deploy stripe-to-invoice (with DB secrets + migrations)

on:
  push:
    branches:
      - main
      - feature/**
      - release/**
    tags:
      - "*"
  workflow_dispatch:

jobs:
  # --------------------------------------------------
  # BUILD IMAGE
  # --------------------------------------------------
  build:
    runs-on: ubuntu-22.04

    steps:
      - uses: actions/checkout@v4

      - name: Inject slug variables
        uses: rlespinasse/github-slug-action@v4

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build & push image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: stripe_to_invoice/deployment/Dockerfile
          push: true
          tags: docker.io/kimjunte/stripe_to_invoice:${{ env.GITHUB_REF_SLUG }}

  # --------------------------------------------------
  # DEPLOY POSTGRES
  # --------------------------------------------------
  deploy-db:
    runs-on: mealcraft-runners
    needs: build

    steps:
      - uses: actions/checkout@v4

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/tags/* || "$GITHUB_REF" == refs/heads/release/* ]]; then
            echo "ENV=prod" >> $GITHUB_ENV
            echo "NAMESPACE=default" >> $GITHUB_ENV
            echo "PG_VOLUME=stripe_invoice_prod" >> $GITHUB_ENV
          else
            echo "ENV=dev" >> $GITHUB_ENV
            echo "NAMESPACE=dev" >> $GITHUB_ENV
            echo "PG_VOLUME=stripe_invoice_dev" >> $GITHUB_ENV
          fi

      - name: Install kubectl
        run: |
          sudo apt-get update
          sudo apt-get install -y curl ca-certificates gettext
          curl -LO "https://dl.k8s.io/release/$(curl -sL https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
          sudo install -m 0755 kubectl /usr/local/bin/kubectl

      - name: Configure kubeconfig (in-cluster)
        run: |
          kubectl config set-cluster microk8s \
            --server="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT" \
            --certificate-authority=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
          kubectl config set-credentials runner \
            --token="$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)"
          kubectl config set-context runner-context --cluster=microk8s --user=runner
          kubectl config use-context runner-context

      - name: Apply Postgres manifests
        run: |
          export ENV NAMESPACE PG_VOLUME
          envsubst < db/k8s/postgres/stripe-to-invoice-db.yaml | kubectl apply -f -

  # --------------------------------------------------
  # APPLY SECRETS
  # --------------------------------------------------
  secrets:
    runs-on: mealcraft-runners
    needs: deploy-db

    steps:
      - uses: actions/checkout@v4

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/tags/* || "$GITHUB_REF" == refs/heads/release/* ]]; then
            echo "ENV=prod" >> $GITHUB_ENV
            echo "NAMESPACE=default" >> $GITHUB_ENV
            echo "RUNTIME_SECRET=postgres-prod" >> $GITHUB_ENV
            echo "POSTGRES_HOST=postgres-prod.default.svc.cluster.local" >> $GITHUB_ENV
          else
            echo "ENV=dev" >> $GITHUB_ENV
            echo "NAMESPACE=dev" >> $GITHUB_ENV
            echo "RUNTIME_SECRET=postgres-dev" >> $GITHUB_ENV
            echo "POSTGRES_HOST=postgres-dev.dev.svc.cluster.local" >> $GITHUB_ENV
          fi

      - name: Install kubectl
        run: |
          sudo apt-get update
          sudo apt-get install -y curl ca-certificates gettext
          curl -LO "https://dl.k8s.io/release/$(curl -sL https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
          sudo install -m 0755 kubectl /usr/local/bin/kubectl

      - name: Configure kubeconfig (in-cluster)
        run: |
          kubectl config set-cluster microk8s \
            --server="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT" \
            --certificate-authority=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
          kubectl config set-credentials runner \
            --token="$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)"
          kubectl config set-context runner-context --cluster=microk8s --user=runner
          kubectl config use-context runner-context

      - name: Apply DB secret
        run: |
          set -a
          source db/.env
          set +a

          if [[ "$ENV" == "prod" ]]; then
            USER="$PROD_POSTGRES_USER"
            PASS="$PROD_POSTGRES_PASSWORD"
          else
            USER="$DEV_POSTGRES_USER"
            PASS="$DEV_POSTGRES_PASSWORD"
          fi

          DATABASE_URL="postgres://${USER}:${PASS}@${POSTGRES_HOST}:5432/stripe_invoice?sslmode=disable"

          kubectl create secret generic "$RUNTIME_SECRET" \
            --namespace "$NAMESPACE" \
            --from-literal=DATABASE_URL="$DATABASE_URL" \
            --dry-run=client -o yaml | kubectl apply -f -

  # --------------------------------------------------
  # RUN MIGRATIONS
  # --------------------------------------------------
  migrate:
    runs-on: mealcraft-runners
    needs: secrets

    steps:
      - uses: actions/checkout@v4

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/tags/* || "$GITHUB_REF" == refs/heads/release/* ]]; then
            echo "SECRET=postgres-prod" >> $GITHUB_ENV
            echo "NAMESPACE=default" >> $GITHUB_ENV
          else
            echo "SECRET=postgres-dev" >> $GITHUB_ENV
            echo "NAMESPACE=dev" >> $GITHUB_ENV
          fi

      - uses: ariga/setup-atlas@v0

      - name: Install kubectl
        run: |
          sudo apt-get install -y kubectl

      - name: Run migrations
        run: |
          DATABASE_URL=$(kubectl get secret "$SECRET" \
            -n "$NAMESPACE" \
            -o jsonpath='{.data.DATABASE_URL}' | base64 -d)

          atlas migrate apply \
            --dir file://db/atlas/stripe_invoice/migrations \
            --url "$DATABASE_URL"

  # --------------------------------------------------
  # DEPLOY APP
  # --------------------------------------------------
  deploy:
    runs-on: mealcraft-runners
    needs: [build, secrets, migrate]

    steps:
      - uses: actions/checkout@v4

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/tags/* || "$GITHUB_REF" == refs/heads/release/* ]]; then
            echo "NAMESPACE=default" >> $GITHUB_ENV
            echo "DB_ENV=prod" >> $GITHUB_ENV
            echo "HOSTNAME=stripe-to-invoice.juntekim.com" >> $GITHUB_ENV
          else
            echo "NAMESPACE=dev" >> $GITHUB_ENV
            echo "DB_ENV=dev" >> $GITHUB_ENV
            echo "HOSTNAME=stripe-to-invoice.dev.juntekim.com" >> $GITHUB_ENV
          fi

      - name: Install kubectl
        run: |
          sudo apt-get install -y kubectl

      - name: Inject slug variables
        uses: rlespinasse/github-slug-action@v4

      - name: Deploy application
        run: |
          export IMAGE="docker.io/kimjunte/stripe_to_invoice:$GITHUB_REF_SLUG"
          export NAMESPACE DB_ENV HOSTNAME
          envsubst < stripe_to_invoice/deployment/deployment.yaml | kubectl apply -f -