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

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

    // Validate inputs
    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 address' },
        { status: 400 }
      );
    }

    const resendApiKey = process.env.RESEND_API_KEY;
    if (!resendApiKey) {
      console.error('[v0] RESEND_API_KEY not configured');
      return NextResponse.json(
        { error: 'Email service not configured' },
        { status: 500 }
      );
    }

    // Send email via Resend
    const response = await fetch('https://api.resend.com/emails', {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${resendApiKey}`,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        from: 'Cloudrite Contact Form <noreply@cloudrite.co.nz>',
        to: 'contact@cloudrite.co.nz',
        replyTo: email,
        subject: `New Contact Form Submission from ${name}`,
        html: `
          <h2>New Contact Form Submission</h2>
          <p><strong>Name:</strong> ${escapeHtml(name)}</p>
          <p><strong>Email:</strong> ${escapeHtml(email)}</p>
          <p><strong>Message:</strong></p>
          <p>${escapeHtml(message).replace(/\n/g, '<br>')}</p>
        `,
      }),
    });

    if (!response.ok) {
      const error = await response.json();
      console.error('[v0] Resend API error:', error);
      return NextResponse.json(
        { error: 'Failed to send email' },
        { status: 500 }
      );
    }

    return NextResponse.json(
      { success: true, message: 'Email sent successfully' },
      { status: 200 }
    );
  } catch (error) {
    console.error('[v0] Email route error:', error);
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    );
  }
}

function escapeHtml(text: string): string {
  const map: { [key: string]: string } = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#039;',
  };
  return text.replace(/[&<>"']/g, (char) => map[char]);
}