<?php

namespace objects;

use classes\db;
use classes\object_property;
use Exception;
use Random\RandomException;
use traits\db_object_t;

class passkeys_o extends db
{
    use db_object_t;
    public object_property $credential_id;
    public object_property $public_key;
    public object_property $is_subuser; // If the passkey belongs to a subuser or a customer
    public object_property $user_id; // The customer number or subuser id, depending on the value of is_subuser
    public object_property $sign_count; // The number of times the passkey has been used to sign in, used to detect cloned passkeys
    public object_property $algorithm; // The algorithm used to create the passkey, e.g. "ES256"
    public object_property $transports; // The transports supported by the authenticator, e.g. ["usb", "nfc", "ble"] (JSON encoded array)
    public object_property $backup_state; // JSON encoded object containing the backup state of the passkey, e.g. {"backup_id": "1234", "backup_date": "2024-01-01T00:00:00Z"}
    public object_property $name; // The name of the passkey, e.g. "iPhone 12 Pro Max"
    public object_property $created_at;
    public object_property $updated_at;
    public object_property $deleted_at;

    public function structure(): void
    {
        $this->setTable('passkeys');
    }

    /**
     * Finds a passkey by its credential ID, optionally constrained to a given user ID.
     * Returns the selected object instance on success or null if not found.
     */
    public function findByCredentialId(string $credentialId, ?int $userId = null): ?self
    {
        global $db;
        $credentialId = $db->escape_string($credentialId);
        $where = "credential_id = '" . $credentialId . "'";
        if ($userId !== null) {
            $where .= ' AND user_id = ' . (int)$userId;
        }
        $sql = "SELECT id FROM $this->table WHERE $where LIMIT 1";
        $result = $db->query($sql);
        $row = $db->fetch_assoc($result);
        if (!$row || !isset($row['id'])) {
            return null;
        }
        $this->select((int)$row['id']);
        return $this;
    }

    /**
     * Add a new passkey for a user
     * @param int $user_id The customer number or subuser id, depending on the value of is_subuser
     * @param bool $is_subuser If the passkey belongs to a subuser or a customer
     * @param string $credential_id The credential ID of the passkey, base64url encoded
     * @param string $public_key The public key of the passkey, base64url encoded
     * @param string $algorithm The algorithm used to create the passkey, e.g. "ES256"
     * @param array $transports The transports supported by the authenticator, e.g. ["usb", "nfc", "ble"]
     * @param string|null $name The name of the passkey, e.g. "iPhone 12 Pro Max"
     * @return void
     * @throws Exception If the object was not created successfully
     * @throws RandomException If the token generation fails
     */
    public function add(int $user_id, bool $is_subuser, string $credential_id, string $public_key, string $algorithm, array $transports, ?string $name = null): void
    {
        $data = [
            'user_id' => $user_id,
            'is_subuser' => $is_subuser,
            'credential_id' => $credential_id,
            'public_key' => $public_key,
            'algorithm' => $algorithm,
            'transports' => json_encode($transports),
            'sign_count' => 0,
            'backup_state' => json_encode(new \stdClass()),
            'name' => $name,
        ];
        $tmp_id = self::add_object($data);
        $this->id = $tmp_id;
        self::getObjectProperties();
        self::objectChanged();
    }

    /**
     * @return void
     */
    public function getObjectProperties(): void
    {
        $this->credential_id = new object_property($this->table, $this->id, 'credential_id', 'string', false);
        $this->public_key = new object_property($this->table, $this->id, 'public_key', 'string', false);
        $this->is_subuser = new object_property($this->table, $this->id, 'is_subuser', 'bool', false);
        $this->user_id = new object_property($this->table, $this->id, 'user_id', 'int', false);
        $this->sign_count = new object_property($this->table, $this->id, 'sign_count', 'int', false);
        $this->algorithm = new object_property($this->table, $this->id, 'algorithm', 'string', false);
        $this->transports = new object_property($this->table, $this->id, 'transports', 'json', false);
        $this->backup_state = new object_property($this->table, $this->id, 'backup_state', 'json', false);
        $this->name = new object_property($this->table, $this->id, 'name', 'string', false);
        $this->created_at = new object_property($this->table, $this->id, 'created_at', 'timestamp', false);
        $this->updated_at = new object_property($this->table, $this->id, 'updated_at', 'timestamp', false);
        $this->deleted_at = new object_property($this->table, $this->id, 'deleted_at', 'timestamp', false);
    }

    public function objectChanged(): void
    {
        //TODO: Add cache invalidation
    }
}