const express = require('express');
const { authenticate } = require('../middleware/auth');
const { prisma } = require('../utils/db');
const { updateProfile, changePassword } = require('../controllers/user');
const { updateProfileValidation, changePasswordValidation } = require('../middleware/validators');

const router = express.Router();

// GET /api/users/me - Get current authenticated user
router.get('/me', authenticate, async (req, res, next) => {
  try {
    // req.user is set by authenticate middleware
    const user = await prisma.user.findUnique({
      where: { id: req.user.id },
      select: {
        id: true,
        username: true,
        email: true,
        emailVerified: true,
        firstName: true,
        lastName: true,
        wsdcId: true,
        avatar: true,
        createdAt: true,
        updatedAt: true,
        _count: {
          select: {
            matchesAsUser1: true,
            matchesAsUser2: true,
            ratingsReceived: true,
          },
        },
      },
    });

    if (!user) {
      return res.status(404).json({
        success: false,
        error: 'User not found',
      });
    }

    // Calculate total matches
    const totalMatches = user._count.matchesAsUser1 + user._count.matchesAsUser2;

    // Calculate average rating
    const ratings = await prisma.rating.findMany({
      where: { ratedId: user.id },
      select: { score: true },
    });

    const averageRating = ratings.length > 0
      ? ratings.reduce((sum, r) => sum + r.score, 0) / ratings.length
      : 0;

    res.json({
      success: true,
      data: {
        ...user,
        stats: {
          matchesCount: totalMatches,
          ratingsCount: user._count.ratingsReceived,
          rating: averageRating.toFixed(1),
        },
      },
    });
  } catch (error) {
    next(error);
  }
});

// PATCH /api/users/me - Update user profile
router.patch('/me', authenticate, updateProfileValidation, updateProfile);

// PATCH /api/users/me/password - Change password
router.patch('/me/password', authenticate, changePasswordValidation, changePassword);

module.exports = router;