<?php

declare(strict_types=1);

namespace KTXC\Controllers;

use KTXC\Http\Response\JsonResponse;
use KTXC\Service\SystemFirewallRuleService;
use KTXC\Service\TenantFirewallRuleService;
use KTXF\Controller\ControllerAbstract;
use KTXF\Routing\Attributes\AuthenticatedRoute;

final class FirewallController extends ControllerAbstract
{
    public function __construct(
        private readonly TenantFirewallRuleService $tenantRules,
        private readonly SystemFirewallRuleService $systemRules,
    ) {
    }

    #[AuthenticatedRoute(
        '/firewall/rules',
        name: 'firewall.tenant.rules.list',
        permissions: [TenantFirewallRuleService::PERMISSION_READ],
    )]
    public function tenantRules(
        string $status = 'active',
        ?string $type = null,
        ?string $action = null,
        string $limit = '50',
        string $offset = '0'
    ): JsonResponse {
        return $this->queryResponse(
            fn(int $parsedLimit, int $parsedOffset): array => $this->tenantRules->queryRules(
                $status,
                $type,
                $action,
                $parsedLimit,
                $parsedOffset
            ),
            $limit,
            $offset
        );
    }

    #[AuthenticatedRoute(
        '/firewall/rules/{ruleId}',
        name: 'firewall.tenant.rules.fetch',
        permissions: [TenantFirewallRuleService::PERMISSION_READ],
    )]
    public function tenantRule(string $ruleId): JsonResponse
    {
        return $this->ruleResponse($this->tenantRules->fetchRule($ruleId));
    }

    #[AuthenticatedRoute(
        '/firewall/effective-policy',
        name: 'firewall.tenant.policy.effective',
        permissions: [TenantFirewallRuleService::PERMISSION_READ],
    )]
    public function effectivePolicy(): JsonResponse
    {
        return new JsonResponse($this->tenantRules->effectivePolicy());
    }

    #[AuthenticatedRoute(
        '/firewall/system/rules',
        name: 'firewall.system.rules.list',
        permissions: [SystemFirewallRuleService::PERMISSION_READ],
    )]
    public function systemRules(
        string $status = 'active',
        ?string $type = null,
        ?string $action = null,
        string $limit = '50',
        string $offset = '0'
    ): JsonResponse {
        return $this->queryResponse(
            fn(int $parsedLimit, int $parsedOffset): array => $this->systemRules->queryRules(
                $status,
                $type,
                $action,
                $parsedLimit,
                $parsedOffset
            ),
            $limit,
            $offset
        );
    }

    #[AuthenticatedRoute(
        '/firewall/system/rules/{ruleId}',
        name: 'firewall.system.rules.fetch',
        permissions: [SystemFirewallRuleService::PERMISSION_READ],
    )]
    public function systemRule(string $ruleId): JsonResponse
    {
        return $this->ruleResponse($this->systemRules->fetchRule($ruleId));
    }

    private function queryResponse(callable $query, string $limit, string $offset): JsonResponse
    {
        try {
            if (!ctype_digit($limit) || !ctype_digit($offset)) {
                throw new \InvalidArgumentException('Pagination values must be non-negative integers.');
            }
            return new JsonResponse($query((int)$limit, (int)$offset));
        } catch (\InvalidArgumentException $error) {
            return new JsonResponse(['error' => $error->getMessage()], JsonResponse::HTTP_BAD_REQUEST);
        }
    }

    private function ruleResponse(?\JsonSerializable $rule): JsonResponse
    {
        if ($rule === null) {
            return new JsonResponse(['error' => 'Firewall rule not found.'], JsonResponse::HTTP_NOT_FOUND);
        }

        return new JsonResponse($rule);
    }
}