import { NextRequest, NextResponse } from 'next/server';
import { getAuthService } from '@/lib/auth';
import { getDriverRepository } from '@/lib/di-container';
import { Driver } from '@gridpilot/racing';

export async function POST(request: NextRequest) {
  try {
    const authService = getAuthService();
    const session = await authService.getCurrentSession();

    if (!session) {
      return NextResponse.json(
        { error: 'Not authenticated' },
        { status: 401 }
      );
    }

    const body = await request.json();
    const { firstName, lastName, displayName, country, timezone, bio } = body;

    // Validation
    if (!firstName || !firstName.trim()) {
      return NextResponse.json(
        { error: 'First name is required' },
        { status: 400 }
      );
    }

    if (!lastName || !lastName.trim()) {
      return NextResponse.json(
        { error: 'Last name is required' },
        { status: 400 }
      );
    }

    if (!displayName || displayName.trim().length < 3) {
      return NextResponse.json(
        { error: 'Display name must be at least 3 characters' },
        { status: 400 }
      );
    }

    if (!country) {
      return NextResponse.json(
        { error: 'Country is required' },
        { status: 400 }
      );
    }

    const driverRepo = getDriverRepository();

    // Check if user already has a driver profile
    if (session.user.primaryDriverId) {
      const existingDriver = await driverRepo.findById(session.user.primaryDriverId);
      if (existingDriver) {
        return NextResponse.json(
          { error: 'Driver profile already exists' },
          { status: 400 }
        );
      }
    }

    // Create the driver profile
    const driverId = crypto.randomUUID();
    const driver = Driver.create({
      id: driverId,
      iracingId: '', // Will be set later via OAuth
      name: displayName.trim(),
      country: country,
      bio: bio || undefined,
    });

    await driverRepo.create(driver);

    // Update user's primary driver ID in session
    // Note: This would typically update the user record and refresh the session
    // For now we'll just return success and let the client handle navigation

    return NextResponse.json({
      success: true,
      driverId: driverId,
    });
  } catch (error) {
    console.error('Onboarding error:', error);
    return NextResponse.json(
      { error: error instanceof Error ? error.message : 'Failed to complete onboarding' },
      { status: 500 }
    );
  }
}