<?php

namespace app\common\library\ps;

use app\common\model\ps\Factory;
use think\Request;

/**
 * 工厂 Open API Key：明文只在生成时返回一次，库中存 SHA256。
 */
class FactoryApiKey
{
    /**
     * @param Factory $factory
     * @return string 明文 Key
     */
    public static function generate(Factory $factory)
    {
        $plain = 'psk_' . bin2hex(random_bytes(16));
        $factory->save([
            'api_key_hash'   => hash('sha256', $plain),
            'api_key_prefix' => substr($plain, 0, 12),
            'api_key_time'   => time(),
        ]);
        return $plain;
    }

    /**
     * @param Request $request
     * @return string
     */
    public static function fromRequest(Request $request)
    {
        $key = trim((string)$request->header('x-api-key', ''));
        if ($key === '') {
            $auth = trim((string)$request->header('authorization', ''));
            if (stripos($auth, 'bearer ') === 0) {
                $key = trim(substr($auth, 7));
            }
        }
        if ($key === '') {
            $key = trim((string)$request->request('api_key', ''));
        }
        return $key;
    }

    /**
     * @param string $plain
     * @return Factory|null
     */
    public static function findFactory($plain)
    {
        $plain = trim((string)$plain);
        if ($plain === '' || strpos($plain, 'psk_') !== 0) {
            return null;
        }
        return Factory::where('api_key_hash', hash('sha256', $plain))
            ->where('status', 'normal')
            ->find();
    }
}