<?php

declare(strict_types=1);

namespace Kreait\Firebase\JWT;

use DateInterval;
use Kreait\Clock\SystemClock;
use Kreait\Firebase\JWT\Action\CreateCustomToken;
use Kreait\Firebase\JWT\Action\CreateCustomToken\Handler;
use Kreait\Firebase\JWT\Action\CreateCustomToken\WithHandlerDiscovery;
use Kreait\Firebase\JWT\Contract\Token;
use Kreait\Firebase\JWT\Error\CustomTokenCreationFailed;
use Kreait\Firebase\JWT\Value\Duration;

final class CustomTokenGenerator
{
    /** @var Handler */
    private $handler;

    /** @var string|null */
    private $tenantId;

    public function __construct(Handler $handler)
    {
        $this->handler = $handler;
    }

    public static function withClientEmailAndPrivateKey(string $clientEmail, string $privateKey): self
    {
        $handler = new WithHandlerDiscovery($clientEmail, $privateKey, new SystemClock());

        return new self($handler);
    }

    public function withTenantId(string $tenantId): self
    {
        $generator = clone $this;
        $generator->tenantId = $tenantId;

        return $generator;
    }

    public function execute(CreateCustomToken $action): Token
    {
        if ($this->tenantId) {
            $action = $action->withTenantId($this->tenantId);
        }

        return $this->handler->handle($action);
    }

    /**
     * @param array<string, mixed> $claims
     * @param Duration|DateInterval|string|int $timeToLive
     *
     * @throws CustomTokenCreationFailed
     */
    public function createCustomToken(string $uid, array $claims = null, $timeToLive = null): Token
    {
        $action = CreateCustomToken::forUid($uid);

        if ($claims !== null) {
            $action = $action->withCustomClaims($claims);
        }

        if ($timeToLive !== null) {
            $action = $action->withTimeToLive($timeToLive);
        }

        return $this->execute($action);
    }
}