<?php
/**
 * HELP4BIS Contact Form Handler
 * Receives JSON POST from main.js, sends via local mail transport (sendmail).
 * Handles fields from contact.html and sos-fix.html.
 * MAIL_TO/MAIL_FROM can be overridden via /home/help4bis/.env if present.
 */

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: https://help4bis.com');
header('Access-Control-Allow-Methods: POST');

// Only accept POST
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['ok' => false, 'error' => 'Method not allowed']);
    exit;
}

// Load .env
$env = [];
$envFile = '/home/help4bis/.env';
if (file_exists($envFile)) {
    foreach (file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) as $line) {
        if (str_starts_with(trim($line), '#') || !str_contains($line, '=')) continue;
        [$key, $val] = explode('=', $line, 2);
        $env[trim($key)] = trim($val);
    }
}

// Parse JSON body
$data = json_decode(file_get_contents('php://input'), true);
if (!$data) {
    // Fall back to form-encoded
    $data = $_POST;
}

// Sanitise and validate required fields
$name     = trim(strip_tags($data['name']     ?? ''));
$email    = trim(strip_tags($data['email']    ?? ''));
$service  = trim(strip_tags($data['service']  ?? ''));
$budget   = trim(strip_tags($data['budget']   ?? ''));
$timeline = trim(strip_tags($data['timeline'] ?? ''));

// Message field — normalise across all forms
$message  = trim(strip_tags($data['message'] ?? $data['details'] ?? $data['description'] ?? ''));

// sos-fix.html specific fields
$source     = trim(strip_tags($data['source']      ?? ''));
$url        = trim(strip_tags($data['url']         ?? ''));
$issue_type = trim(strip_tags($data['issue_type']  ?? ''));
$wp_access  = trim(strip_tags($data['wp_access']   ?? ''));
$urgency    = trim(strip_tags($data['urgency']     ?? ''));

if (!$name || !$email || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
    http_response_code(422);
    echo json_encode(['ok' => false, 'error' => 'Name and a valid email address are required.']);
    exit;
}

// Build email subject
$subject = $source === 'sos-fix'
    ? "SOS Fix request from {$name}" . ($issue_type ? " — {$issue_type}" : '')
    : "New brief from {$name}" . ($service ? " — {$service}" : '');

// Build email body
$body  = "Name: {$name}\n";
$body .= "Email: {$email}\n";

if ($source)     $body .= "Source: {$source}\n";
if ($url)        $body .= "Website: {$url}\n";
if ($service)    $body .= "Service: {$service}\n";
if ($issue_type) $body .= "Issue type: {$issue_type}\n";
if ($budget)     $body .= "Budget: {$budget}\n";
if ($timeline)   $body .= "Timeline: {$timeline}\n";
if ($wp_access)  $body .= "WP access: {$wp_access}\n";
if ($urgency)    $body .= "Urgency: {$urgency}\n";

$body .= "\n--- Message ---\n{$message}\n";

// PHPMailer
require __DIR__ . '/vendor/autoload.php';

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

$mail = new PHPMailer(true);

try {
    $mail->isMail();

    $mail->setFrom($env['MAIL_FROM'] ?? 'project@help4bis.com', $env['SMTP_FROM_NAME'] ?? 'HELP4BIS');
    $mail->addAddress($env['MAIL_TO'] ?? 'project@help4bis.com');
    $mail->addReplyTo($email, $name);

    $mail->Subject = $subject;
    $mail->Body    = $body;

    $mail->send();

    echo json_encode(['ok' => true]);

} catch (Exception $e) {
    error_log('HELP4BIS contact form mailer error: ' . $mail->ErrorInfo);
    http_response_code(500);
    echo json_encode(['ok' => false, 'error' => 'Mail could not be sent. Please email project@help4bis.com directly.']);
}