<?php
namespace WizupForms;
defined('ABSPATH') || exit;

final class Mapper {
    public static function build(array $fields, array $settings) {
        $s = Settings::clean($settings);
        $name = trim(self::value($fields, $s['name']) . ' ' . self::value($fields, $s['last_name']));
        $phone = self::phone(self::value($fields, $s['phone']), $s['country']);
        if ($name === '' || mb_strlen($name) > 255) {
            return new \WP_Error('name', 'יש למפות שדה שם מלא (עד 255 תווים).');
        }
        if ($phone === '') {
            return new \WP_Error('phone', 'יש למפות מספר טלפון תקין עם קידומת מדינה.');
        }
        $payload = ['name' => $name, 'phone' => $phone];
        $email = self::value($fields, $s['email']);
        if ($email !== '') {
            if (!is_email($email) || strlen($email) > 255) {
                return new \WP_Error('email', 'כתובת האימייל אינה תקינה.');
            }
            $payload['email'] = $email;
        }
        if ($s['stage_id']) { $payload['stage_id'] = $s['stage_id']; }
        foreach ($s['custom'] as $row) {
            if (!array_key_exists($row['field'], $fields)) { continue; }
            $value = self::value($fields, $row['field']);
            if ($row['type'] === 'boolean') {
                $value = !in_array(strtolower($value), ['', '0', 'false', 'no', 'off'], true);
            } elseif (mb_strlen($value) > 2000) {
                return new \WP_Error('custom_fields', 'ערך של שדה מותאם ארוך מ-2,000 תווים.');
            }
            $payload['custom_fields'][$row['key']] = $value;
        }
        return $payload;
    }

    private static function value(array $fields, string $id): string {
        $v = $id !== '' ? ($fields[$id] ?? '') : '';
        if (is_array($v)) { $v = implode(', ', array_filter($v, 'is_scalar')); }
        return is_scalar($v) ? trim(sanitize_textarea_field((string) $v)) : '';
    }

    public static function phone(string $raw, string $country): string {
        // Reject extensions, letters and non-phone input instead of silently altering it.
        if (!preg_match('/^[+0-9\s().-]+$/D', $raw)) { return ''; }
        $phone = preg_replace('/[\s().-]/', '', $raw);
        if (str_starts_with($phone, '00')) { $phone = '+' . substr($phone, 2); }
        if (!str_starts_with($phone, '+')) {
            if ($country === '') { return ''; }
            $phone = '+' . (str_starts_with($phone, $country) ? $phone : $country . ltrim($phone, '0'));
        }
        return preg_match('/^\+[1-9][0-9]{7,14}$/D', $phone) ? $phone : '';
    }
}