<?php
declare(strict_types=1);

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    exit;
}

header('Content-Type: application/json');

$email = trim(strip_tags($_POST['email'] ?? ''));
$phone = trim(strip_tags($_POST['phone'] ?? ''));
$sqft  = trim(strip_tags($_POST['sqft']  ?? ''));

if (!$email || !$phone || !$sqft) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'All fields are required.']);
    exit;
}

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'Invalid email address.']);
    exit;
}

$sqft_int = (int) preg_replace('/[^0-9]/', '', $sqft);
if ($sqft_int < 50 || $sqft_int > 50000) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'Please enter a valid square footage.']);
    exit;
}

$api_key   = getenv('RESEND_API_KEY');
$from      = getenv('FROM_EMAIL') ?: 'Floor It Hardwood Floors <webleads@floorithardwoods.com>';
$to_email  = getenv('TO_EMAIL')   ?: 'floorithardwoods@gmail.com';
if (!$api_key) {
    http_response_code(500);
    echo json_encode(['ok' => false, 'error' => 'Server configuration error.']);
    exit;
}

$body = "Summer Refinishing Savings Lead\n\nEmail: {$email}\nPhone: {$phone}\nSquare Footage: {$sqft_int} sq ft\n\nOffer: Save up to 15% off through June 30, 2026.";

$payload = json_encode([
    'from'    => $from,
    'to'      => [$to_email],
    'subject' => "Summer Promo Lead: {$sqft_int} sq ft from {$email}",
    'text'    => $body,
]);

$ch = curl_init('https://api.resend.com/emails');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST           => true,
    CURLOPT_POSTFIELDS     => $payload,
    CURLOPT_HTTPHEADER     => [
        'Authorization: Bearer ' . $api_key,
        'Content-Type: application/json',
    ],
    CURLOPT_TIMEOUT        => 10,
]);

$response = curl_exec($ch);
$status   = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($status >= 200 && $status < 300) {
    echo json_encode(['ok' => true]);
} else {
    http_response_code(502);
    echo json_encode(['ok' => false, 'error' => 'Something went wrong. Please call (716) 602-1429.']);
}