<?php

declare(strict_types=1);

namespace KTXC\Security\Event;

use KTXF\Event\Event;

/**
 * Security-specific event for authentication and access control events
 */
final class SecurityEvent extends Event implements SecurityRequestEventInterface
{
    // Event names
    public const AUTH_SUCCESS = 'security.auth.success';
    public const AUTH_LOGOUT = 'security.auth.logout';
    public const TOKEN_REFRESH = 'security.token.refresh';
    public const TOKEN_REVOKED = 'security.token.revoked';
    
    public const ACCESS_GRANTED = 'security.access.granted';
    
    public const RATE_LIMIT_EXCEEDED = 'security.rate_limit.exceeded';
    public const SUSPICIOUS_ACTIVITY = 'security.suspicious.activity';
    
    public const IP_BLOCKED = 'security.ip.blocked';
    public const IP_ALLOWED = 'security.ip.allowed';
    public const DEVICE_BLOCKED = 'security.device.blocked';
    public const FIREWALL_RULE_CREATED = 'security.firewall.rule.created';
    public const FIREWALL_RULE_EXTENDED = 'security.firewall.rule.extended';
    public const FIREWALL_RULE_ENABLED = 'security.firewall.rule.enabled';
    public const FIREWALL_RULE_DISABLED = 'security.firewall.rule.disabled';
    public const FIREWALL_RULE_REMOVED = 'security.firewall.rule.removed';
    public const FIREWALL_SETTINGS_UPDATED = 'security.firewall.settings.updated';

    // Severity levels
    public const SEVERITY_DEBUG = 0;
    public const SEVERITY_INFO = 1;
    public const SEVERITY_WARNING = 2;
    public const SEVERITY_ERROR = 3;
    public const SEVERITY_CRITICAL = 4;

    private readonly int $severity;

    public function __construct(
        string $name,
        array $data = [],
        ?string $tenantId = null,
        ?string $identityId = null,
        private readonly ?string $ipAddress = null,
        private readonly ?string $deviceFingerprint = null,
        private readonly ?string $userAgent = null,
        private readonly ?string $requestPath = null,
        private readonly ?string $requestMethod = null,
        private readonly ?string $userId = null,
        private readonly ?string $reason = null,
        ?int $severity = null,
    ) {
        parent::__construct($name, $data, $tenantId, $identityId);

        $this->severity = $severity ?? self::getSeverityForEvent($name);
    }

    /**
     * Create a security event with common parameters
     */
    public static function create(
        string $name,
        ?string $ipAddress = null,
        ?string $deviceFingerprint = null,
        array $data = [],
        ?string $tenantId = null,
        ?string $identityId = null,
        ?string $userAgent = null,
        ?string $requestPath = null,
        ?string $requestMethod = null,
        ?string $userId = null,
        ?string $reason = null,
        ?int $severity = null,
    ): self {
        return new self(
            $name,
            $data,
            $tenantId,
            $identityId,
            $ipAddress,
            $deviceFingerprint,
            $userAgent,
            $requestPath,
            $requestMethod,
            $userId,
            $reason,
            $severity,
        );
    }

    /**
     * Create an authentication success event
     */
    public static function authSuccess(
        string $ipAddress,
        ?string $deviceFingerprint = null,
        ?string $userId = null,
        ?string $tenantId = null,
    ): self {
        return self::create(
            self::AUTH_SUCCESS,
            $ipAddress,
            $deviceFingerprint,
            ['userId' => $userId],
            tenantId: $tenantId,
            userId: $userId,
        );
    }

    /**
     * Create a rate limit exceeded event
     */
    public static function rateLimitExceeded(
        string $ipAddress,
        int $requestCount,
        int $windowSeconds,
        ?string $endpoint = null,
        ?string $tenantId = null,
    ): self {
        return self::create(
            self::RATE_LIMIT_EXCEEDED,
            $ipAddress,
            data: [
                'requestCount' => $requestCount,
                'windowSeconds' => $windowSeconds,
                'endpoint' => $endpoint,
            ],
            tenantId: $tenantId,
            requestPath: $endpoint,
            reason: sprintf('%d requests in %d seconds', $requestCount, $windowSeconds),
        );
    }

    /**
     * Get default severity for event types
     */
    private static function getSeverityForEvent(string $eventName): int
    {
        return match ($eventName) {
            self::AUTH_SUCCESS,
            self::ACCESS_GRANTED,
            self::TOKEN_REFRESH => self::SEVERITY_INFO,
            
            self::AUTH_LOGOUT,
            self::TOKEN_REVOKED => self::SEVERITY_WARNING,
            
            self::RATE_LIMIT_EXCEEDED,
            self::SUSPICIOUS_ACTIVITY => self::SEVERITY_ERROR,
            
            self::IP_BLOCKED,
            self::DEVICE_BLOCKED => self::SEVERITY_CRITICAL,
            
            default => self::SEVERITY_INFO,
        };
    }

    // Getters and setters

    public function getIpAddress(): ?string
    {
        return $this->ipAddress;
    }

    public function getDeviceFingerprint(): ?string
    {
        return $this->deviceFingerprint;
    }

    public function getUserAgent(): ?string
    {
        return $this->userAgent;
    }

    public function getRequestPath(): ?string
    {
        return $this->requestPath;
    }

    public function getRequestMethod(): ?string
    {
        return $this->requestMethod;
    }

    public function getUserId(): ?string
    {
        return $this->userId;
    }

    public function getReason(): ?string
    {
        return $this->reason;
    }

    public function getSeverity(): int
    {
        return $this->severity;
    }

}