name: build-and-deploy

# Прод — единственное окружение деплоя, поэтому катим при каждом пуше в main.
# Раннер должен быть self-hosted во внутренней сети: Nexus (nexus.tnsu.kz) снаружи
# не достаётся. workflow_dispatch — на случай ручного передеплоя (например, старым тегом).
on:
  push:
    branches: [main]
  workflow_dispatch:
    inputs:
      image_tag:
        description: "Тег образа (по умолчанию — короткий sha коммита)"
        required: false
        default: ""

env:
  REGISTRY: nexus.tnsu.kz:8082
  IMAGE: hr-appeals-web

jobs:
  # Единый источник тега для образа и для деплоя
  prepare:
    runs-on: ubuntu-22.04
    outputs:
      tag: ${{ steps.vars.outputs.tag }}
    steps:
      - name: Resolve image tag
        id: vars
        run: |
          TAG="${{ github.event.inputs.image_tag }}"
          if [ -z "$TAG" ]; then TAG="${GITHUB_SHA::8}"; fi
          echo "tag=$TAG" >> "$GITHUB_OUTPUT"

  build-and-push:
    needs: prepare
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Ensure docker CLI is installed
        run: |
          set -e
          SUDO=""
          if [ "$(id -u)" -ne 0 ]; then SUDO="sudo"; fi
          if ! command -v docker >/dev/null 2>&1; then
            $SUDO apt-get update
            $SUDO env DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends docker.io
          fi

      - name: Docker login to Nexus
        run: echo "${{ secrets.NEXUS_PASSWORD }}" | docker login "$REGISTRY" -u "${{ secrets.NEXUS_USER }}" --password-stdin

      - name: Build image
        run: |
          docker build \
            -t "$REGISTRY/$IMAGE:${{ needs.prepare.outputs.tag }}" \
            -t "$REGISTRY/$IMAGE:latest" \
            .

      - name: Push image
        run: |
          docker push "$REGISTRY/$IMAGE:${{ needs.prepare.outputs.tag }}"
          docker push "$REGISTRY/$IMAGE:latest"

      - name: Docker logout
        if: always()
        run: docker logout "$REGISTRY"

  deploy:
    needs: [prepare, build-and-push]
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Ensure ssh client is installed
        run: |
          set -e
          SUDO=""
          if [ "$(id -u)" -ne 0 ]; then SUDO="sudo"; fi
          if ! command -v ssh >/dev/null 2>&1 || ! command -v scp >/dev/null 2>&1 || ! command -v ssh-keyscan >/dev/null 2>&1; then
            $SUDO apt-get update
            $SUDO env DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends openssh-client
          fi

      - name: Configure SSH
        run: |
          mkdir -p ~/.ssh
          printf '%s\n' "${{ secrets.DEPLOY_SSH_KEY }}" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          ssh-keyscan -H "${{ vars.DEPLOY_HOST }}" >> ~/.ssh/known_hosts

      - name: Upload compose file
        run: |
          scp -i ~/.ssh/deploy_key docker-compose.yml \
            "${{ vars.DEPLOY_USER }}@${{ vars.DEPLOY_HOST }}:${{ vars.DEPLOY_PATH }}/docker-compose.yml"

      - name: Roll out
        run: |
          ssh -i ~/.ssh/deploy_key "${{ vars.DEPLOY_USER }}@${{ vars.DEPLOY_HOST }}" "
            set -e
            cd '${{ vars.DEPLOY_PATH }}'
            sed -i '/^IMAGE_TAG=/d' .env
            echo 'IMAGE_TAG=${{ needs.prepare.outputs.tag }}' >> .env
            docker compose pull
            docker compose up -d --remove-orphans
            docker image prune -f
          "

      - name: Cleanup SSH key
        if: always()
        run: rm -f ~/.ssh/deploy_key