<?php
// includes/db.php
class TireStore {
    private static $file = __DIR__ . '/../data/store.json';

    public static function getData() {
        if (!file_exists(self::$file)) {
            require_once __DIR__ . '/../data/init.php';
        }
        $json = file_get_contents(self::$file);
        return json_decode($json, true) ?: [];
    }

    public static function saveData($data) {
        return file_put_contents(self::$file, json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
    }

    public static function getTires() {
        $data = self::getData();
        return $data['tires'] ?? [];
    }

    public static function getTireById($id) {
        $tires = self::getTires();
        foreach ($tires as $tire) {
            if ($tire['id'] === $id) {
                return $tire;
            }
        }
        return null;
    }

    public static function getBrands() {
        $data = self::getData();
        return $data['brands'] ?? [];
    }

    public static function getArticles() {
        $data = self::getData();
        return $data['articles'] ?? [];
    }

    public static function getPressureGuide() {
        $data = self::getData();
        return $data['pressure_guide'] ?? [];
    }

    public static function getConsultations() {
        $data = self::getData();
        return $data['consultations'] ?? [];
    }

    public static function addConsultation($entry) {
        $data = self::getData();
        $entry['id'] = 'CNS-' . (count($data['consultations'] ?? []) + 101);
        $entry['created_at'] = date('Y-m-d H:i');
        $entry['status'] = 'جدید';
        $entry['admin_note'] = '';
        $data['consultations'][] = $entry;
        self::saveData($data);
        return $entry;
    }

    public static function updateConsultationStatus($id, $status, $note = '') {
        $data = self::getData();
        foreach ($data['consultations'] as &$c) {
            if ($c['id'] === $id) {
                $c['status'] = $status;
                if ($note !== '') {
                    $c['admin_note'] = $note;
                }
                self::saveData($data);
                return true;
            }
        }
        return false;
    }

    public static function deleteConsultation($id) {
        $data = self::getData();
        $data['consultations'] = array_values(array_filter($data['consultations'], function($c) use ($id) {
            return $c['id'] !== $id;
        }));
        return self::saveData($data);
    }

    public static function addTire($tire) {
        $data = self::getData();
        $data['tires'][] = $tire;
        self::saveData($data);
        return true;
    }

    public static function updateTire($id, $updatedFields) {
        $data = self::getData();
        foreach ($data['tires'] as &$tire) {
            if ($tire['id'] === $id) {
                $tire = array_merge($tire, $updatedFields);
                self::saveData($data);
                return true;
            }
        }
        return false;
    }

    public static function deleteTire($id) {
        $data = self::getData();
        $data['tires'] = array_values(array_filter($data['tires'], function($t) use ($id) {
            return $t['id'] !== $id;
        }));
        return self::saveData($data);
    }

    public static function getSettings() {
        $data = self::getData();
        return $data['settings'] ?? [
            "site_phone" => "021-88889900",
            "emergency_phone" => "09123456789",
            "announcement" => "تضمین اصالت کالا و گارانتی معتبر شرکتی تا ۶۰ ماه | تاریخ تولید روز (2026)",
            "central_address" => "تهران، خیابان آزادی، تقاطع یادگار امام، مجتمع تایر قاسمی"
        ];
    }

    public static function updateSettings($settings) {
        $data = self::getData();
        $data['settings'] = array_merge($data['settings'] ?? [], $settings);
        return self::saveData($data);
    }
}