/**
 * WSDC API Controller
 * Provides proxy endpoint for World Swing Dance Council (WSDC) dancer lookup
 */

const { prisma } = require('../utils/db');
const WSDC_API_BASE = 'https://points.worldsdc.com/lookup2020/find';

/**
 * Lookup dancer by WSDC ID
 * GET /api/wsdc/lookup?id=26997
 */
exports.lookupDancer = async (req, res) => {
  try {
    const { id } = req.query;

    // Validate WSDC ID
    if (!id) {
      return res.status(400).json({
        error: 'Bad Request',
        message: 'WSDC ID is required'
      });
    }

    // Validate WSDC ID format (numeric, max 10 digits)
    if (!/^\d{1,10}$/.test(id)) {
      return res.status(400).json({
        error: 'Bad Request',
        message: 'Invalid WSDC ID format. Must be numeric.'
      });
    }

    // Fetch from WSDC API
    const url = `${WSDC_API_BASE}?q=${id}`;
    const response = await fetch(url);

    if (!response.ok) {
      console.error(`WSDC API error: ${response.status} ${response.statusText}`);
      return res.status(502).json({
        error: 'Bad Gateway',
        message: 'Failed to fetch data from WSDC API'
      });
    }

    const data = await response.json();

    // Check if dancer was found
    if (!data || !data.dancer_wsdcid) {
      return res.status(404).json({
        error: 'Not Found',
        message: 'Dancer with this WSDC ID not found'
      });
    }

    // Extract relevant fields
    const dancerData = {
      wsdcId: data.dancer_wsdcid,
      firstName: data.dancer_first || '',
      lastName: data.dancer_last || '',
      // Optional: include competitive level info if needed
      recentYear: data.recent_year,
      dominateRole: data.dominate_data?.short_dominate_role || null
    };

    // Check if user with this WSDC ID already exists in our database
    const existingUser = await prisma.user.findUnique({
      where: { wsdcId: String(data.dancer_wsdcid) }
    });

    return res.status(200).json({
      success: true,
      dancer: dancerData,
      accountExists: !!existingUser
    });

  } catch (error) {
    console.error('Error in lookupDancer:', error);
    return res.status(500).json({
      error: 'Internal Server Error',
      message: 'An error occurred while looking up dancer'
    });
  }
};