name: Deploy API Server

on:
  push:
    branches: [main]

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout latest code
        run: |
          if [ -d /tmp/api-server ]; then
            cd /tmp/api-server && git pull
          else
            git clone http://localhost:3000/suche-Hermes/api-server.git /tmp/api-server
          fi

      - name: Build Docker image
        run: cd /tmp/api-server && docker build -t zhixi-api:latest .

      - name: Stop old container
        run: docker stop zhixi-api 2>/dev/null || true

      - name: Remove old container
        run: docker rm zhixi-api 2>/dev/null || true

      - name: Ensure infrastructure is ready
        run: |
          # Create network if missing
          docker network inspect zhixi-net >/dev/null 2>&1 || docker network create zhixi-net

          # Start MySQL + Redis via docker compose (try common locations)
          for dir in /opt/zhixi /root/zhixi /tmp/api-server; do
            if [ -f "$dir/docker-compose.yml" ]; then
              cd "$dir" && docker compose up -d mysql redis 2>/dev/null || true
              break
            fi
          done
          sleep 5

      - name: Resolve failed migrations
        run: |
          MYSQL_PASS=$(docker exec mysql-zhixi printenv MYSQL_PASSWORD 2>/dev/null || echo "Zhixi@2026!App")
          MYSQL_CMD="docker exec mysql-zhixi mysql -u zhixi_user -p${MYSQL_PASS} zhixi"

          # Check for failed/stuck migrations
          FAILED=$($MYSQL_CMD -N -e \
            "SELECT migration_name FROM _prisma_migrations WHERE logs LIKE '%failed%' LIMIT 1;" 2>/dev/null || true)

          if [ -n "$FAILED" ]; then
            echo "[deploy] Found failed migration: $FAILED, cleaning up partially-created objects..."

            # Drop new tables from the migration (IF EXISTS is safe)
            $MYSQL_CMD -e "DROP TABLE IF EXISTS AiUsageLog;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS WaitlistEntry;" 2>/dev/null || true

            # Drop new columns from UploadedFile (without IF EXISTS for MySQL < 8.0.29 compat)
            $MYSQL_CMD -e "ALTER TABLE UploadedFile DROP COLUMN objectKey;" 2>/dev/null || true
            $MYSQL_CMD -e "ALTER TABLE UploadedFile DROP COLUMN bucket;" 2>/dev/null || true

            # Drop index (ignore error if not exists)
            $MYSQL_CMD -e "DROP INDEX UploadedFile_objectKey_idx ON UploadedFile;" 2>/dev/null || true

            # Remove the failed migration record so Prisma can re-apply it
            $MYSQL_CMD -e "DELETE FROM _prisma_migrations WHERE migration_name = '$FAILED';"

            echo "[deploy] Cleaned up failed migration $FAILED"
          else
            echo "[deploy] No failed migrations found"
          fi

      - name: Start new container
        run: |
          ENV_FILE=""
          if [ -f /etc/zhixi/.env.production ]; then
            ENV_FILE="--env-file /etc/zhixi/.env.production"
          fi
          docker run -d \
            --name zhixi-api \
            --network zhixi-net \
            --restart unless-stopped \
            -p 3001:3000 \
            $ENV_FILE \
            zhixi-api:latest

      - name: Deploy RAG Worker
        run: |
          WORKER_DIR="/opt/zhixi/backend/rag-worker"
          mkdir -p "$WORKER_DIR"

          # Sync worker code from checkout (exclude .env to avoid overwriting secrets)
          rsync -av --delete --exclude='.env' --exclude='__pycache__' \
            /tmp/api-server/rag-worker/ "$WORKER_DIR/"

          # Copy service file and reload
          cp "$WORKER_DIR/zhixi-worker.service" /etc/systemd/system/
          systemctl daemon-reload
          systemctl restart zhixi-worker
          sleep 8
          systemctl is-active zhixi-worker && echo "[deploy] zhixi-worker active OK" || {
            echo "[deploy] zhixi-worker FAILED, checking logs:"
            journalctl -u zhixi-worker --no-pager -n 30
            exit 1
          }

      - name: Health check
        run: |
          sleep 8
          curl -f http://localhost:3001/health || (docker logs zhixi-api --tail 30 && exit 1)