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

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: Build image
        run: |
          docker build \
            -f stripe_to_invoice/deployment/Dockerfile \
            -t docker.io/kimjunte/stripe_to_invoice:$GITHUB_REF_SLUG \
            .

      - name: Push image
        run: |
          docker push docker.io/kimjunte/stripe_to_invoice:$GITHUB_REF_SLUG

  # --------------------------------------------------
  # APPLY DB SECRETS
  # --------------------------------------------------
  secrets:
    name: Apply runtime DB secret
    runs-on: mealcraft-runners
    needs: build

    steps:
      - uses: actions/checkout@v4

      - 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: |
          KUBE_HOST="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT"
          SA_TOKEN=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
          CA_CERT=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt

          kubectl config set-cluster microk8s \
            --server="$KUBE_HOST" \
            --certificate-authority="$CA_CERT"

          kubectl config set-credentials runner --token="$SA_TOKEN"

          kubectl config set-context runner-context \
            --cluster=microk8s \
            --user=runner

          kubectl config use-context runner-context

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/heads/main || "$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
            echo "POSTGRES_DB=stripe_invoice" >> $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
            echo "POSTGRES_DB=stripe_invoice_dev" >> $GITHUB_ENV
          fi

      - name: Load DB creds from db/.env and apply 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}@${POSTGRES_HOST}:5432/${POSTGRES_DB}?sslmode=disable"

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

  # --------------------------------------------------
  # DEPLOY APP
  # --------------------------------------------------
  deploy:
    runs-on: mealcraft-runners
    needs:
      - build
      - secrets

    steps:
      - uses: actions/checkout@v4

      - 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: |
          KUBE_HOST="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT"
          SA_TOKEN=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
          CA_CERT=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
          NAMESPACE=$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace)

          kubectl config set-cluster microk8s --server="$KUBE_HOST" --certificate-authority="$CA_CERT"
          kubectl config set-credentials runner --token="$SA_TOKEN"
          kubectl config set-context runner-context --cluster=microk8s --user=runner --namespace="$NAMESPACE"
          kubectl config use-context runner-context

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

      - name: Decide environment
        run: |
          if [[ "$GITHUB_REF" == refs/heads/release/* || "$GITHUB_REF" == refs/tags/* ]]; 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: 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 -