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 (DEV + PROD)
  # --------------------------------------------------
  deploy-db:
    name: Deploy Postgres (PV + PVC + Deployment)
    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 "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: Apply Postgres manifests
        run: |
          export ENV NAMESPACE PG_VOLUME
          envsubst < db/k8s/postgres/stripe-to-invoice-db.yaml | kubectl apply -f -


  # --------------------------------------------------
  # APPLY DB + APP SECRETS
  # --------------------------------------------------
  secrets:
    name: Apply runtime secrets
    runs-on: mealcraft-runners
    needs: deploy-db

    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" >> $GITHUB_ENV
          fi

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

          if [[ "$ENV" == "prod" ]]; then
            USER="$PROD_POSTGRES_USER"
            PASS="$PROD_POSTGRES_PASSWORD"
            RUNTIME_SECRET=postgres-prod
            NAMESPACE=default
          else
            USER="$DEV_POSTGRES_USER"
            PASS="$DEV_POSTGRES_PASSWORD"
            RUNTIME_SECRET=postgres-dev
            NAMESPACE=dev
          fi

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

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


      - name: Apply app secrets
        run: |
          set -e
          set -a
          source stripe_to_invoice/deployment/secrets/.env
          set +a

          if [[ "$ENV" == "prod" ]]; then
            NAMESPACE=default
            STRIPE_SECRET_KEY="$PROD_STRIPE_SECRET_KEY"
            STRIPE_CLIENT_ID="$PROD_STRIPE_CLIENT_ID"
            STRIPE_REDIRECT_URI="$PROD_STRIPE_REDIRECT_URI"
            APP_URL="$PROD_APP_URL"
            XERO_CLIENT_ID="$PROD_XERO_CLIENT_ID"
            XERO_CLIENT_SECRET="$PROD_XERO_SECRET_KEY"
            XERO_REDIRECT_URI="$PROD_XERO_REDIRECT_URI"
            AWS_REGION="$PROD_AWS_REGION"
            STRIPE_WEBHOOK_SECRET="$PROD_STRIPE_WEBHOOK_SECRET"
            SES_FROM_EMAIL="$PROD_SES_FROM_EMAIL"
          else
            STRIPE_SECRET_KEY="$DEV_STRIPE_SECRET_KEY"
            STRIPE_CLIENT_ID="$DEV_STRIPE_CLIENT_ID"
            STRIPE_REDIRECT_URI="$DEV_STRIPE_REDIRECT_URI"
            APP_URL="$DEV_APP_URL"
            XERO_CLIENT_ID="$DEV_XERO_CLIENT_ID"
            XERO_CLIENT_SECRET="$DEV_XERO_SECRET_KEY"
            XERO_REDIRECT_URI="$DEV_XERO_REDIRECT_URI"
            AWS_REGION="$DEV_AWS_REGION"
            STRIPE_WEBHOOK_SECRET="$DEV_STRIPE_WEBHOOK_SECRET"
            SES_FROM_EMAIL="$DEV_SES_FROM_EMAIL"
          fi

          : "${STRIPE_SECRET_KEY:?missing STRIPE_SECRET_KEY}"
          : "${STRIPE_CLIENT_ID:?missing STRIPE_CLIENT_ID}"
          : "${APP_URL:?missing APP_URL}"
          : "${STRIPE_REDIRECT_URI:?missing STRIPE_REDIRECT_URI}"
          : "${XERO_CLIENT_ID:?missing XERO_CLIENT_ID}"
          : "${XERO_CLIENT_SECRET:?missing XERO_CLIENT_SECRET}"
          : "${XERO_REDIRECT_URI:?missing XERO_REDIRECT_URI}"
          : "${AWS_REGION:?missing AWS_REGION}"
          : "${SES_FROM_EMAIL:?missing SES_FROM_EMAIL}"

          export \
            STRIPE_SECRET_KEY \
            STRIPE_CLIENT_ID \
            STRIPE_REDIRECT_URI \
            APP_URL \
            XERO_CLIENT_ID \
            XERO_CLIENT_SECRET \
            XERO_REDIRECT_URI \
            AWS_REGION \
            STRIPE_WEBHOOK_SECRET \
            SES_FROM_EMAIL \
            NAMESPACE 

          envsubst < stripe_to_invoice/deployment/secrets/stripe-secrets.yaml \
            | kubectl apply -f -

  # --------------------------------------------------
  # RUN ATLAS MIGRATIONS
  # --------------------------------------------------
  migrate:
    name: Run DB migrations (Atlas)
    runs-on: mealcraft-runners
    needs: secrets

    steps:
      - uses: actions/checkout@v4

      - name: Install Atlas
        uses: ariga/setup-atlas@v0

      - name: Install netcat
        run: |
          sudo apt-get update
          sudo apt-get install -y netcat-openbsd

      - 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 "POSTGRES_HOST=postgres-prod.default.svc.cluster.local" >> $GITHUB_ENV
            echo "POSTGRES_DB=stripe_invoice" >> $GITHUB_ENV
          else
            echo "ENV=dev" >> $GITHUB_ENV
            echo "POSTGRES_HOST=postgres-dev.dev.svc.cluster.local" >> $GITHUB_ENV
            echo "POSTGRES_DB=stripe_invoice" >> $GITHUB_ENV
          fi

      - name: Wait for Postgres TCP
        run: |
          set -e
          for i in {1..30}; do
            if nc -z "$POSTGRES_HOST" 5432; then
              echo "Postgres is accepting connections"
              exit 0
            fi
            echo "Waiting for Postgres ($i/30)..."
            sleep 5
          done
          echo "Postgres never became ready"
          exit 1


      - name: Run migrations
        run: |
          set -e
          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"
          atlas migrate apply \
            --dir file://db/atlas/stripe_invoice/migrations \
            --url "$DATABASE_URL"

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

    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 -