name: Deploy Production

on:
  push:
    branches:
      - main

env:
  REGISTRY_URL: ${{ vars.REGISTRY_URL }}
  IMAGE_NAME: ${{ vars.IMAGE_NAME }}
  APP_ENV: production

jobs:
  build-and-push:
    name: Build and Push
    runs-on: ubuntu-latest
    outputs:
      image_tag: ${{ steps.meta.outputs.image_tag }}
      app_version: ${{ steps.meta.outputs.app_version }}
    environment:
      name: production
      url: https://practicas.prod.kubistudio.cloud
    steps:
      - name: Checkout
        uses: actions/checkout@v4

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

      - name: Login to Gitea Registry
        run: |
          set -euo pipefail
          echo "${{ secrets.TOKEN }}" | docker login $REGISTRY_URL -u ${{ gitea.actor }} --password-stdin

      - name: Build and push
        id: meta
        run: |
          set -euo pipefail
          SHA_TAG="${{ gitea.sha }}"
          PROD_TAG="production-latest"
          STABLE_TAG="stable"
          BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
          APP_VERSION="release-${{ gitea.sha }}"

          docker buildx build \
            --push \
            --build-arg APP_VERSION=${APP_VERSION} \
            --build-arg BUILD_DATE=${BUILD_DATE} \
            --build-arg GIT_COMMIT=${SHA_TAG} \
            --build-arg GIT_BRANCH=main \
            -t ${REGISTRY_URL}/${IMAGE_NAME}:${PROD_TAG} \
            -t ${REGISTRY_URL}/${IMAGE_NAME}:${STABLE_TAG} \
            -t ${REGISTRY_URL}/${IMAGE_NAME}:sha-${SHA_TAG} \
            .

          echo "image_tag=${PROD_TAG}" >> $GITEA_OUTPUT
          echo "app_version=${APP_VERSION}" >> $GITEA_OUTPUT
          echo "::notice::Image pushed: ${REGISTRY_URL}/${IMAGE_NAME}:${PROD_TAG}"

  deploy:
    name: Deploy to Production
    runs-on: ubuntu-latest
    needs: build-and-push
    environment:
      name: production
      url: https://practicas.prod.kubistudio.cloud
    steps:
      - name: Deploy via SSH
        run: |
          set -euo pipefail
          IMAGE_TAG="${{ needs.build-and-push.outputs.image_tag }}"
          APP_VERSION="${{ needs.build-and-push.outputs.app_version }}"

          eval $(ssh-agent -s)
          echo "${{ secrets.DEPLOY_SSH_KEY }}" | ssh-add -

          mkdir -p ~/.ssh
          ssh-keyscan -H ${{ secrets.DEPLOY_HOST }} >> ~/.ssh/known_hosts 2>/dev/null

          # 1. Pasamos las variables como argumentos en el mismo orden
          ssh ${{ secrets.DEPLOY_USERNAME }}@${{ secrets.DEPLOY_HOST }} bash -s \
            "${{ env.REGISTRY_URL }}" \
            "${{ env.IMAGE_NAME }}" \
            "${IMAGE_TAG}" \
            "${APP_VERSION}" \
            "${{ gitea.actor }}" \
            "${{ secrets.TOKEN }}" << 'EOF'
            set -euo pipefail

            # 2. Las recibimos dentro de la sesión remota
            REGISTRY_URL=$1
            IMAGE_NAME=$2
            IMAGE_TAG=$3
            APP_VERSION=$4
            GITEA_ACTOR=$5
            TOKEN=$6

            echo "Saving current image tag for rollback..."
            CURRENT_IMAGE=$(docker inspect cicd-prod --format '{{.Config.Image}}' 2>/dev/null || echo "")

            echo "Pulling image..."
            echo "$TOKEN" | docker login $REGISTRY_URL -u $GITEA_ACTOR --password-stdin
            docker pull $REGISTRY_URL/$IMAGE_NAME:$IMAGE_TAG

            echo "Stopping existing container..."
            docker stop cicd-prod 2>/dev/null || true
            docker rm cicd-prod 2>/dev/null || true

            echo "Starting new container..."
            docker run -d --name cicd-prod --restart unless-stopped -p 8083:80 \
              -e APP_ENV=production \
              -e APP_VERSION=${APP_VERSION} \
              -e DEPLOY_TIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
              $REGISTRY_URL/$IMAGE_NAME:$IMAGE_TAG

            echo "Waiting for health check..."
            HEALTHY=false
            for i in $(seq 1 12); do
              if curl -sf http://localhost:8083/health > /dev/null 2>&1; then
                HEALTHY=true
                echo "::notice::Production health check passed"
                break
              fi
              sleep 5
            done

            if [ "$HEALTHY" = false ]; then
              echo "::error::Health check failed - rolling back"

              docker stop cicd-prod 2>/dev/null || true
              docker rm cicd-prod 2>/dev/null || true

              if [ -n "$CURRENT_IMAGE" ]; then
                docker run -d \
                  --name cicd-prod \
                  --restart unless-stopped \
                  -p 8083:80 \
                  -e APP_ENV=production \
                  -e APP_VERSION=rollback \
                  -e DEPLOY_TIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
                  "$CURRENT_IMAGE"

                echo "::warning::Rollback completed to previous image: $CURRENT_IMAGE"
              else
                echo "::error::No previous image available for rollback"
              fi

              exit 1
            fi
          EOF

  release-notes:
    name: Release Notes
    runs-on: ubuntu-latest
    needs: [build-and-push, deploy]
    if: success()
    steps:
      - name: Generate release notes
        run: |
          set -euo pipefail
          COMMITS_SINCE_LAST=$(git log --oneline --no-decorate ${{ gitea.sha }} -n 20 2>/dev/null || echo "No commit history available")

          cat << 'SUMMARY' >> $GITEA_HOME/workflow/summary
          ## Production Deployment Successful :rocket:

          **Version:** ${{ needs.build-and-push.outputs.app_version }}
          **Commit:** ${{ gitea.sha }}
          **Image:** ${{ vars.REGISTRY_URL }}/${{ vars.IMAGE_NAME }}:production-latest
          **URL:** https://practicas.prod.kubistudio.cloud

          ### Recent Commits
          ```
          SUMMARY

          git log --oneline --no-decorate -n 20 ${{ gitea.sha }} 2>/dev/null >> $GITEA_HOME/workflow/summary || true

          cat << 'SUMMARY' >> $GITEA_HOME/workflow/summary
          ```

          ### Rollback
          If needed, rollback with:
          ```bash
          docker stop cicd-prod && docker rm cicd-prod
          docker run -d --name cicd-prod --restart unless-stopped -p 8083:80 \${{ vars.REGISTRY_URL }}/\${{ vars.IMAGE_NAME }}:stable
          ```
          SUMMARY