import { NextRequest, NextResponse } from 'next/server';
import { Resend } from 'resend';

export async function POST(request: NextRequest) {
  try {
    const body = await request.json();
    const { name, email, message, locale } = body;

    // Validate required fields
    if (!name || !email || !message) {
      return NextResponse.json(
        { error: 'Missing required fields' },
        { status: 400 }
      );
    }

    // Validate email format
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailRegex.test(email)) {
      return NextResponse.json(
        { error: 'Invalid email format' },
        { status: 400 }
      );
    }

    // Check if Resend API key is configured
    if (!process.env.RESEND_API_KEY) {
      return NextResponse.json(
        { error: 'Email service not configured' },
        { status: 500 }
      );
    }

    const resend = new Resend(process.env.RESEND_API_KEY);

    // Send email via Resend
    const { data, error } = await resend.emails.send({
      from: 'KLZ Cables <contact@klz-cables.com>',
      to: ['info@klz-cables.com'],
      subject: locale === 'de' ? 'Neue Kontaktanfrage' : 'New Contact Inquiry',
      html: `
        <h2>${locale === 'de' ? 'Neue Kontaktanfrage' : 'New Contact Inquiry'}</h2>
        <p><strong>${locale === 'de' ? 'Name' : 'Name'}:</strong> ${name}</p>
        <p><strong>${locale === 'de' ? 'E-Mail' : 'Email'}:</strong> ${email}</p>
        <p><strong>${locale === 'de' ? 'Nachricht' : 'Message'}:</strong></p>
        <p>${message}</p>
        <hr>
        <p><small>${locale === 'de' ? 'Gesendet über' : 'Sent via'} KLZ Cables Website</small></p>
      `,
    });

    if (error) {
      console.error('Resend error:', error);
      return NextResponse.json(
        { error: 'Failed to send email' },
        { status: 500 }
      );
    }

    return NextResponse.json(
      { success: true, data },
      { status: 200 }
    );

  } catch (error) {
    console.error('Contact API error:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}