name: Deploy API Server

on:
  push:
    branches: [main]

env:
  DATABASE_URL: mysql://zhixi_user:hKHQ+N0wBjJAiLukFu5OMEI8@127.0.0.1:3306/zhixi_prod

jobs:
  build-and-deploy:
    runs-on: prod
    steps:
      - name: Checkout latest code
        run: |
          if [ -d /tmp/api-server ]; then
            cd /tmp/api-server && git fetch origin && git reset --hard origin/main
          else
            git clone http://10.2.0.7:3000/wangdl/api-server.git /tmp/api-server
          fi

      - name: Install dependencies
        run: |
          cd /tmp/api-server
          npm ci

      - name: Build
        run: |
          cd /tmp/api-server
          npx prisma generate
          npm run build
          if [ ! -f dist/main.js ] && [ -f dist/src/main.js ]; then
            echo "[build] Moving dist/src/* to dist/"
            mv dist/src/* dist/
            rm -rf dist/src
          fi
          ls -la dist/main.js

      - name: Ensure infrastructure is ready
        run: |
          docker start mysql redis qdrant 2>/dev/null || true
          sleep 2

      - name: Resolve failed migrations
        run: |
          MYSQL_CMD="docker exec mysql mysql -u zhixi_user -phKHQ+N0wBjJAiLukFu5OMEI8 zhixi_prod"
          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..."
            $MYSQL_CMD -e "DROP TABLE IF EXISTS AiUsageLog;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS WaitlistEntry;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS ModelRoute;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS ProviderConfig;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS FallbackEvent;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS ViolationRecord;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS UserDevice;" 2>/dev/null || true
            $MYSQL_CMD -e "DROP TABLE IF EXISTS AccountDeletionRequest;" 2>/dev/null || true
            $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
            $MYSQL_CMD -e "DROP INDEX UploadedFile_objectKey_idx ON UploadedFile;" 2>/dev/null || true
            $MYSQL_CMD -e "DELETE FROM _prisma_migrations WHERE migration_name = '$FAILED';"
            echo "[deploy] Cleaned up failed migration $FAILED"
          else
            echo "[deploy] No failed migrations found"
          fi

      - name: Run database migrations
        run: |
          cd /tmp/api-server
          npx prisma migrate deploy

      - name: Deploy NestJS API
        run: |
          rsync -av --delete \
            /tmp/api-server/dist/ /opt/zhixi/backend/dist/
          rsync -av --delete \
            /tmp/api-server/node_modules/ /opt/zhixi/backend/node_modules/
          rsync -av \
            /tmp/api-server/prisma/ /opt/zhixi/backend/prisma/
          rsync -av \
            /tmp/api-server/package.json /opt/zhixi/backend/package.json

      - name: Generate Prisma client
        run: |
          cd /opt/zhixi/backend && npx prisma generate

      - name: Test-run and health check
        run: |
          # Run app directly on alternate port to avoid systemd conflict
          cd /opt/zhixi/backend
          PORT=3001 node dist/main.js > /tmp/zhixi-startup.log 2>&1 &
          APP_PID=$!
          echo "[deploy] App PID: $APP_PID (port 3001)"
          # Wait for app to start (up to 30s)
          for i in $(seq 1 30); do
            sleep 1
            if curl -sf http://localhost:3001/api > /dev/null 2>&1; then
              echo "[deploy] API healthy on port 3001 after ${i}s!"
              break
            fi
            if ! kill -0 $APP_PID 2>/dev/null; then
              echo "[deploy] App crashed after ${i}s — startup log:"
              cat /tmp/zhixi-startup.log
              exit 1
            fi
          done
          # Kill test instance
          kill $APP_PID 2>/dev/null
          wait $APP_PID 2>/dev/null

      - name: Restart API service
        run: |
          sudo systemctl restart zhixi-api
          sleep 5
          if sudo systemctl is-active zhixi-api; then
            echo "[deploy] zhixi-api active OK"
          else
            echo "[deploy] zhixi-api FAILED to start"
            exit 1
          fi

      - name: Deploy RAG Worker
        run: |
          set -e
          WORKER_DIR="/opt/zhixi/backend/rag-worker"
          mkdir -p "$WORKER_DIR"
          rsync -av --delete --exclude='.env' --exclude='__pycache__' \
            /tmp/api-server/rag-worker/ "$WORKER_DIR/"
          sudo cp "$WORKER_DIR/zhixi-worker.service" /etc/systemd/system/
          sudo systemctl daemon-reload
          sudo systemctl restart zhixi-worker
          sleep 5
          sudo systemctl is-active zhixi-worker
          echo "[deploy] zhixi-worker active OK"

      - name: Health check
        run: |
          curl -sf http://localhost:3000/api && echo "[deploy] API health OK" || echo "[deploy] API health check failed (non-fatal)"