import { serve } from 'https://deno.land/std@0.168.0/http/server.ts';

const RESEND_API_KEY = Deno.env.get('RESEND_API_KEY');
const FROM = 'Fourge Branding <hello@fourgebranding.com>';

const corsHeaders = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
};

serve(async (req) => {
  if (req.method === 'OPTIONS') {
    return new Response('ok', { headers: corsHeaders });
  }

  try {
    const { type, to, data } = await req.json();

    let subject = '';
    let html = '';

    if (type === 'new_request') {
      subject = `New Request: ${data.serviceType} — ${data.clientName}`;
      html = `
        <h2>New Request Received</h2>
        <p><strong>From:</strong> ${data.clientName} (${data.clientEmail})</p>
        <p><strong>Company:</strong> ${data.company || '—'}</p>
        <p><strong>Service:</strong> ${data.serviceType}</p>
        <p><strong>Project:</strong> ${data.projectName}</p>
        ${data.deadline ? `<p><strong>Deadline:</strong> ${data.deadline}</p>` : ''}
        <hr />
        <p><strong>Description:</strong></p>
        <p>${data.description}</p>
        <br />
        <a href="https://portal.fourgebranding.com/tasks/${data.taskId}" style="background:#F5A523;color:#1a1a1a;padding:10px 20px;border-radius:6px;text-decoration:none;font-weight:600;">View Job</a>
      `;
    }

    else if (type === 'sent_to_client') {
      subject = `Your ${data.serviceType} is ready for review!`;
      html = `
        <h2>Hi ${data.clientFirstName},</h2>
        <p>Your <strong>${data.serviceType}</strong> for <strong>${data.projectName}</strong> is ready for review.</p>
        ${data.message ? `<p>${data.message}</p>` : ''}
        <p>Please log in to the portal to review and approve or request changes.</p>
        <br />
        <a href="https://portal.fourgebranding.com/my-requests/${data.taskId}" style="background:#F5A523;color:#1a1a1a;padding:10px 20px;border-radius:6px;text-decoration:none;font-weight:600;">Review Your Work</a>
        <br /><br />
        <p style="color:#666;font-size:13px;">— The Fourge Branding Team</p>
      `;
    }

    else if (type === 'revision_submitted') {
      subject = `Revision Request: ${data.serviceType} — ${data.clientName}`;
      html = `
        <h2>Revision Requested</h2>
        <p><strong>From:</strong> ${data.clientName}</p>
        <p><strong>Job:</strong> ${data.serviceType} — ${data.projectName}</p>
        <p><strong>New Version:</strong> ${data.version}</p>
        ${data.deadline ? `<p><strong>New Deadline:</strong> ${data.deadline}</p>` : ''}
        <hr />
        <p><strong>Requested changes:</strong></p>
        <p>${data.description}</p>
        <br />
        <a href="https://portal.fourgebranding.com/tasks/${data.taskId}" style="background:#F5A523;color:#1a1a1a;padding:10px 20px;border-radius:6px;text-decoration:none;font-weight:600;">View Job</a>
      `;
    }

    else if (type === 'client_approved') {
      subject = `Approved! ${data.serviceType} — ${data.clientName}`;
      html = `
        <h2>Job Approved ✓</h2>
        <p><strong>${data.clientName}</strong> has approved <strong>${data.serviceType}</strong> for <strong>${data.projectName}</strong>.</p>
        <p>This job is now complete.</p>
        <br />
        <a href="https://portal.fourgebranding.com/tasks/${data.taskId}" style="background:#F5A523;color:#1a1a1a;padding:10px 20px;border-radius:6px;text-decoration:none;font-weight:600;">View Job</a>
      `;
    }

    const res = await fetch('https://api.resend.com/emails', {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${RESEND_API_KEY}`,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ from: FROM, to, subject, html }),
    });

    const result = await res.json();

    return new Response(JSON.stringify(result), {
      headers: { ...corsHeaders, 'Content-Type': 'application/json' },
      status: res.ok ? 200 : 400,
    });

  } catch (err) {
    return new Response(JSON.stringify({ error: err.message }), {
      headers: { ...corsHeaders, 'Content-Type': 'application/json' },
      status: 500,
    });
  }
});