<?php

namespace App\Services;

use App\Enums\ProxyTypes;
use App\Models\Application;
use App\Models\Server;
use App\Models\Service;
use App\Models\ServiceApplication;
use Illuminate\Container\Container;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;
use Spatie\Url\Url;
use Symfony\Component\Yaml\Yaml;

class EdgeProxyRemoteRouteService
{
    private const string SERVICE_ROUTE_FILE_PREFIX = 'service-remote-';

    private const string APPLICATION_ROUTE_FILE_PREFIX = 'application-remote-';

    public function syncService(Service $service): array
    {
        $teamId = $this->extractServiceTeamId($service);
        $edgeProxyServer = $this->resolveEdgeProxyServerByTeamId($teamId);
        $deploymentServer = $this->resolveDeploymentServer($service);

        if (! $deploymentServer instanceof Server) {
            return [];
        }

        if (! $edgeProxyServer instanceof Server) {
            return [];
        }

        return $this->syncServiceWithServers($service, $edgeProxyServer, $deploymentServer);
    }

    public function syncServiceWithServers(Service $service, Server $edgeProxyServer, Server $deploymentServer): array
    {
        if ($edgeProxyServer->proxyType() !== ProxyTypes::TRAEFIK->value) {
            return [];
        }

        if ($deploymentServer->id === $edgeProxyServer->id) {
            $this->deleteRouteFile($edgeProxyServer, $service->uuid);

            return [];
        }

        $applications = $this->getServiceApplicationsWithDomains($service);
        if ($applications->isEmpty()) {
            $this->deleteRouteFile($edgeProxyServer, $service->uuid);

            return [];
        }

        $tunnelHost = $this->resolveTunnelHost($deploymentServer);
        if (blank($tunnelHost)) {
            $warning = sprintf(
                'Edge proxy route skipped for service %s: remote host is missing. Configure a tunnel host (proxy.wireguard_ip/proxy.wg_ip/proxy.tunnel_ip/proxy.tunnel_host) or set the server IP/domain.',
                $service->uuid
            );

            $this->logWarning($warning);
            $this->deleteRouteFile($edgeProxyServer, $service->uuid);

            return [$warning];
        }

        $compose = $this->parseServiceCompose($service);
        $environmentMap = $this->serviceEnvironmentMap($service);

        $routes = [];
        $warnings = [];
        $networkOverlapWarning = $this->detectDockerNetworkOverlapWarningForResource('service', $service->uuid, $edgeProxyServer, $tunnelHost);
        if (! is_null($networkOverlapWarning)) {
            $warnings[] = $networkOverlapWarning;
        }

        foreach ($applications as $application) {
            $domains = collect(explode(',', (string) $application->fqdn))
                ->map(fn (string $domain) => trim($domain))
                ->filter();

            foreach ($domains as $domain) {
                $unsupportedProtocol = $this->detectUnsupportedDomainProtocol($domain);
                if (! is_null($unsupportedProtocol)) {
                    $warnings[] = sprintf(
                        'Edge proxy route skipped for service %s (%s, domain %s): protocol "%s" is not supported for edge remote routing. Only http:// and https:// domains are currently supported.',
                        $service->uuid,
                        $application->name,
                        $domain,
                        $unsupportedProtocol
                    );

                    continue;
                }

                $url = $this->parseDomainUrl($domain);
                if (! $url instanceof Url) {
                    $warnings[] = sprintf(
                        'Edge proxy route skipped for service %s (%s, domain %s): domain format is invalid. Use a valid hostname/domain with optional scheme, port and path.',
                        $service->uuid,
                        $application->name,
                        $domain
                    );

                    continue;
                }

                $requestedInternalPort = $url->getPort() ?? $application->getRequiredPort();
                $publishedPort = $this->resolvePublishedPort($compose, $application->name, $requestedInternalPort, $environmentMap);

                if (is_null($publishedPort)) {
                    $warnings[] = sprintf(
                        'Edge proxy route skipped for service %s (%s, domain %s): published host port could not be resolved. Expose the container port in docker-compose "ports:" and/or include an explicit port in the domain.',
                        $service->uuid,
                        $application->name,
                        $domain
                    );

                    continue;
                }

                $routes[] = [
                    'host' => $url->getHost(),
                    'path' => $url->getPath(),
                    'upstream_url' => sprintf('http://%s:%d', $tunnelHost, $publishedPort),
                ];
            }
        }

        if (! empty($warnings)) {
            foreach ($warnings as $warning) {
                $this->logWarning($warning);
            }
        }

        if (empty($routes)) {
            $this->deleteRouteFile($edgeProxyServer, $service->uuid);

            return $warnings;
        }

        $config = $this->generateTraefikConfig($service->uuid, $routes);
        try {
            $this->writeRouteFile($edgeProxyServer, $service->uuid, $config);
        } catch (\Throwable $exception) {
            $warning = sprintf(
                'Edge proxy route partially applied for service %s: failed to write dynamic route configuration on edge proxy (%s).',
                $service->uuid,
                $exception->getMessage()
            );
            $this->logWarning($warning);
            $warnings[] = $warning;
        }

        return $warnings;
    }

    public function syncApplication(Application $application): array
    {
        $teamId = $this->extractApplicationTeamId($application);
        $edgeProxyServer = $this->resolveEdgeProxyServerByTeamId($teamId);
        $deploymentServer = $this->resolveApplicationDeploymentServer($application);

        if (! $deploymentServer instanceof Server || ! $edgeProxyServer instanceof Server) {
            return [];
        }

        return $this->syncApplicationWithServers($application, $edgeProxyServer, $deploymentServer);
    }

    public function syncApplicationOnDeploymentServer(Application $application, Server $deploymentServer): array
    {
        $teamId = $this->extractApplicationTeamId($application);
        $edgeProxyServer = $this->resolveEdgeProxyServerByTeamId($teamId);
        if (! $edgeProxyServer instanceof Server) {
            return [];
        }

        return $this->syncApplicationWithServers($application, $edgeProxyServer, $deploymentServer);
    }

    public function syncApplicationWithServers(Application $application, Server $edgeProxyServer, Server $deploymentServer): array
    {
        if ($edgeProxyServer->proxyType() !== ProxyTypes::TRAEFIK->value) {
            return [];
        }

        if ($deploymentServer->id === $edgeProxyServer->id) {
            $this->deleteRouteFile($edgeProxyServer, $application->uuid, self::APPLICATION_ROUTE_FILE_PREFIX);

            return [];
        }

        $domains = $this->getApplicationDomains($application);
        if ($domains->isEmpty()) {
            $this->deleteRouteFile($edgeProxyServer, $application->uuid, self::APPLICATION_ROUTE_FILE_PREFIX);

            return [];
        }

        $tunnelHost = $this->resolveTunnelHost($deploymentServer);
        if (blank($tunnelHost)) {
            $warning = sprintf(
                'Edge proxy route skipped for application %s: remote host is missing. Configure a tunnel host (proxy.wireguard_ip/proxy.wg_ip/proxy.tunnel_ip/proxy.tunnel_host) or set the server IP/domain.',
                $application->uuid
            );

            $this->logWarning($warning);
            $this->deleteRouteFile($edgeProxyServer, $application->uuid, self::APPLICATION_ROUTE_FILE_PREFIX);

            return [$warning];
        }

        $routes = [];
        $warnings = [];
        $networkOverlapWarning = $this->detectDockerNetworkOverlapWarningForResource('application', $application->uuid, $edgeProxyServer, $tunnelHost);
        if (! is_null($networkOverlapWarning)) {
            $warnings[] = $networkOverlapWarning;
        }

        $compose = $this->parseApplicationCompose($application);
        $environmentMap = $this->applicationEnvironmentMap($application);

        foreach ($domains as $domainData) {
            $domain = data_get($domainData, 'domain');
            $composeServiceName = data_get($domainData, 'service_name');

            $unsupportedProtocol = $this->detectUnsupportedDomainProtocol($domain);
            if (! is_null($unsupportedProtocol)) {
                $warnings[] = sprintf(
                    'Edge proxy route skipped for application %s (domain %s): protocol "%s" is not supported for edge remote routing. Only http:// and https:// domains are currently supported.',
                    $application->uuid,
                    $domain,
                    $unsupportedProtocol
                );

                continue;
            }

            $url = $this->parseDomainUrl($domain);
            if (! $url instanceof Url) {
                $warnings[] = sprintf(
                    'Edge proxy route skipped for application %s (domain %s): domain format is invalid. Use a valid hostname/domain with optional scheme, port and path.',
                    $application->uuid,
                    $domain
                );

                continue;
            }

            $requestedInternalPort = $url->getPort();
            $publishedPort = $this->resolvePublishedPortForApplication(
                $application,
                $requestedInternalPort,
                $composeServiceName,
                $compose,
                $environmentMap
            );

            if (is_null($publishedPort)) {
                $warnings[] = sprintf(
                    'Edge proxy route skipped for application %s (domain %s): published host port could not be resolved. Expose the application port in host mappings/compose ports and/or include an explicit port in the domain.',
                    $application->uuid,
                    $domain
                );

                continue;
            }

            $routes[] = [
                'host' => $url->getHost(),
                'path' => $url->getPath(),
                'upstream_url' => sprintf('http://%s:%d', $tunnelHost, $publishedPort),
            ];
        }

        if (! empty($warnings)) {
            foreach ($warnings as $warning) {
                $this->logWarning($warning);
            }
        }

        if (empty($routes)) {
            $this->deleteRouteFile($edgeProxyServer, $application->uuid, self::APPLICATION_ROUTE_FILE_PREFIX);

            return $warnings;
        }

        $config = $this->generateTraefikConfig($application->uuid, $routes);
        try {
            $this->writeRouteFile($edgeProxyServer, $application->uuid, $config, self::APPLICATION_ROUTE_FILE_PREFIX);
        } catch (\Throwable $exception) {
            $warning = sprintf(
                'Edge proxy route partially applied for application %s: failed to write dynamic route configuration on edge proxy (%s).',
                $application->uuid,
                $exception->getMessage()
            );
            $this->logWarning($warning);
            $warnings[] = $warning;
        }

        return $warnings;
    }

    public function deleteService(Service $service): void
    {
        $edgeProxyServer = $this->resolveEdgeProxyServerByTeamId($this->extractServiceTeamId($service));
        if (! $edgeProxyServer instanceof Server || $edgeProxyServer->proxyType() !== ProxyTypes::TRAEFIK->value) {
            return;
        }

        $this->deleteServiceWithServer($service, $edgeProxyServer);
    }

    public function deleteServiceWithServer(Service $service, Server $edgeProxyServer): void
    {
        $this->deleteRouteFile($edgeProxyServer, $service->uuid);
    }

    public function deleteApplication(Application $application): void
    {
        $edgeProxyServer = $this->resolveEdgeProxyServerByTeamId($this->extractApplicationTeamId($application));
        if (! $edgeProxyServer instanceof Server || $edgeProxyServer->proxyType() !== ProxyTypes::TRAEFIK->value) {
            return;
        }

        $this->deleteApplicationWithServer($application, $edgeProxyServer);
    }

    public function deleteApplicationWithServer(Application $application, Server $edgeProxyServer): void
    {
        $this->deleteRouteFile($edgeProxyServer, $application->uuid, self::APPLICATION_ROUTE_FILE_PREFIX);
    }

    public function generateTraefikConfig(string $serviceUuid, array $routes): array
    {
        $serviceKey = Str::slug($serviceUuid);
        if ($serviceKey === '') {
            $serviceKey = 'service';
        }

        $redirectMiddlewareName = "edge-{$serviceKey}-redirect-to-https";

        $config = [
            'http' => [
                'middlewares' => [
                    $redirectMiddlewareName => [
                        'redirectScheme' => [
                            'scheme' => 'https',
                        ],
                    ],
                ],
                'routers' => [],
                'services' => [],
            ],
        ];

        foreach ($routes as $index => $route) {
            $suffix = $index + 1;

            $httpRouterName = "edge-{$serviceKey}-http-{$suffix}";
            $httpsRouterName = "edge-{$serviceKey}-https-{$suffix}";
            $serviceName = "edge-{$serviceKey}-svc-{$suffix}";
            $rule = $this->buildTraefikRule($route['host'], $route['path']);

            $config['http']['routers'][$httpRouterName] = [
                'rule' => $rule,
                'entryPoints' => ['http'],
                'middlewares' => [$redirectMiddlewareName],
                'service' => $serviceName,
            ];

            $config['http']['routers'][$httpsRouterName] = [
                'rule' => $rule,
                'entryPoints' => ['https'],
                'service' => $serviceName,
                'tls' => [
                    'certResolver' => 'letsencrypt',
                ],
            ];

            $config['http']['services'][$serviceName] = [
                'loadBalancer' => [
                    'servers' => [
                        ['url' => $route['upstream_url']],
                    ],
                ],
            ];
        }

        return $config;
    }

    public function routeFilePath(Server $edgeProxyServer, string $serviceUuid): string
    {
        return $this->resourceRouteFilePath($edgeProxyServer, self::SERVICE_ROUTE_FILE_PREFIX, $serviceUuid);
    }

    public function applicationRouteFilePath(Server $edgeProxyServer, string $applicationUuid): string
    {
        return $this->resourceRouteFilePath($edgeProxyServer, self::APPLICATION_ROUTE_FILE_PREFIX, $applicationUuid);
    }

    private function resourceRouteFilePath(Server $edgeProxyServer, string $prefix, string $resourceUuid): string
    {
        return sprintf(
            '%s/%s%s.yaml',
            $this->routeDirectoryPath($edgeProxyServer),
            $prefix,
            $resourceUuid
        );
    }

    protected function runRemoteCommands(Server $server, array $commands, bool $throwError = true): ?string
    {
        return instant_remote_process($commands, $server, $throwError);
    }

    private function routeDirectoryPath(Server $edgeProxyServer): string
    {
        return rtrim($edgeProxyServer->proxyPath(), '/').'/dynamic';
    }

    private function writeRouteFile(Server $edgeProxyServer, string $resourceUuid, array $config, string $filePrefix = self::SERVICE_ROUTE_FILE_PREFIX): void
    {
        $yaml = Yaml::dump($config, 12, 2);
        $banner = "# This file is generated by Coolify, do not edit it manually.\n\n";
        $payload = base64_encode($banner.$yaml);

        $routeFilePath = $this->resourceRouteFilePath($edgeProxyServer, $filePrefix, $resourceUuid);
        $temporaryRouteFilePath = $routeFilePath.'.tmp';

        $escapedDirectory = escapeshellarg($this->routeDirectoryPath($edgeProxyServer));
        $escapedFilePath = escapeshellarg($routeFilePath);
        $escapedTemporaryFilePath = escapeshellarg($temporaryRouteFilePath);

        $this->runRemoteCommands($edgeProxyServer, [
            "mkdir -p $escapedDirectory",
            "echo '$payload' | base64 -d | tee $escapedTemporaryFilePath > /dev/null",
            "mv $escapedTemporaryFilePath $escapedFilePath",
        ]);
    }

    private function deleteRouteFile(Server $edgeProxyServer, string $resourceUuid, string $filePrefix = self::SERVICE_ROUTE_FILE_PREFIX): void
    {
        $routeFilePath = $this->resourceRouteFilePath($edgeProxyServer, $filePrefix, $resourceUuid);
        $escapedFilePath = escapeshellarg($routeFilePath);
        $escapedTemporaryFilePath = escapeshellarg($routeFilePath.'.tmp');

        $this->runRemoteCommands($edgeProxyServer, [
            "rm -f $escapedFilePath $escapedTemporaryFilePath",
        ], false);
    }

    private function buildTraefikRule(string $host, ?string $path): string
    {
        $rule = sprintf('Host(`%s`)', $host);

        if (! is_null($path) && $path !== '' && $path !== '/') {
            $rule .= sprintf(' && PathPrefix(`%s`)', $path);
        }

        return $rule;
    }

    private function resolveEdgeProxyServerByTeamId(?int $teamId): ?Server
    {
        if (is_null($teamId)) {
            return null;
        }

        return Server::query()
            ->where('team_id', $teamId)
            ->whereRelation('settings', 'is_master_domain_router_enabled', true)
            ->orderBy('id')
            ->first();
    }

    private function resolveDeploymentServer(Service $service): ?Server
    {
        $server = data_get($service, 'server');
        if ($server instanceof Server) {
            return $server;
        }

        $server = data_get($service, 'destination.server');
        if ($server instanceof Server) {
            return $server;
        }

        if ($service->exists && ! is_null($service->server_id)) {
            return Server::query()->find($service->server_id);
        }

        return null;
    }

    private function resolveApplicationDeploymentServer(Application $application): ?Server
    {
        $server = data_get($application, 'server');
        if ($server instanceof Server) {
            return $server;
        }

        $server = data_get($application, 'destination.server');
        if ($server instanceof Server) {
            return $server;
        }

        if ($application->exists) {
            $application->loadMissing('destination.server');

            $server = data_get($application, 'destination.server');
            if ($server instanceof Server) {
                return $server;
            }
        }

        return null;
    }

    private function extractServiceTeamId(Service $service): ?int
    {
        $teamId = data_get($service, 'environment.project.team_id');
        if (! is_null($teamId)) {
            return (int) $teamId;
        }

        if ($service->exists) {
            $service->loadMissing('environment.project');
            $teamId = data_get($service, 'environment.project.team_id');
            if (! is_null($teamId)) {
                return (int) $teamId;
            }
        }

        return null;
    }

    private function extractApplicationTeamId(Application $application): ?int
    {
        $teamId = data_get($application, 'environment.project.team_id');
        if (! is_null($teamId)) {
            return (int) $teamId;
        }

        if ($application->exists) {
            $application->loadMissing('environment.project');
            $teamId = data_get($application, 'environment.project.team_id');
            if (! is_null($teamId)) {
                return (int) $teamId;
            }
        }

        return null;
    }

    private function getServiceApplicationsWithDomains(Service $service): Collection
    {
        $applications = collect([]);

        if ($service->relationLoaded('applications')) {
            $applications = $service->applications;
        } elseif ($service->exists) {
            $applications = $service->applications()->get();
        }

        return $applications
            ->filter(fn (ServiceApplication $application) => filled($application->fqdn))
            ->values();
    }

    private function getApplicationDomains(Application $application): Collection
    {
        if ($application->build_pack === 'dockercompose') {
            $domains = collect(json_decode((string) $application->docker_compose_domains, true));
            if ($domains->isEmpty()) {
                return collect([]);
            }

            return $domains
                ->map(function (mixed $domainConfig, string $serviceName) {
                    $domain = data_get($domainConfig, 'domain');
                    if (is_string($domainConfig)) {
                        $domain = $domainConfig;
                    }

                    return [
                        'service_name' => $serviceName,
                        'domain' => (string) $domain,
                    ];
                })
                ->flatMap(function (array $domainData) {
                    return collect(explode(',', $domainData['domain']))
                        ->map(fn (string $domain) => trim($domain))
                        ->filter()
                        ->map(fn (string $domain) => [
                            'service_name' => $domainData['service_name'],
                            'domain' => $domain,
                        ]);
                })
                ->values();
        }

        return collect(explode(',', (string) $application->fqdn))
            ->map(fn (string $domain) => trim($domain))
            ->filter()
            ->map(fn (string $domain) => [
                'service_name' => null,
                'domain' => $domain,
            ])
            ->values();
    }

    private function resolveTunnelHost(Server $deploymentServer): ?string
    {
        $candidates = [
            data_get($deploymentServer, 'proxy.wireguard_ip'),
            data_get($deploymentServer, 'proxy.wg_ip'),
            data_get($deploymentServer, 'proxy.tunnel_ip'),
            data_get($deploymentServer, 'proxy.tunnel_host'),
            data_get($deploymentServer, 'proxy.tunnel_domain'),
            data_get($deploymentServer, 'ip'),
        ];

        foreach ($candidates as $candidate) {
            $normalizedHost = $this->normalizeRemoteHost((string) $candidate);
            if (! is_null($normalizedHost)) {
                return $normalizedHost;
            }
        }

        return null;
    }

    private function parseServiceCompose(Service $service): array
    {
        if (blank($service->docker_compose_raw)) {
            return [];
        }

        try {
            $parsedCompose = Yaml::parse($service->docker_compose_raw);

            return is_array($parsedCompose) ? $parsedCompose : [];
        } catch (\Throwable) {
            return [];
        }
    }

    private function serviceEnvironmentMap(Service $service): array
    {
        if ($service->relationLoaded('environment_variables')) {
            return $service->environment_variables
                ->mapWithKeys(fn ($environmentVariable) => [$environmentVariable->key => (string) $environmentVariable->value])
                ->all();
        }

        if (! $service->exists) {
            return [];
        }

        return $service->environment_variables()
            ->get()
            ->mapWithKeys(fn ($environmentVariable) => [$environmentVariable->key => (string) $environmentVariable->value])
            ->all();
    }

    private function parseApplicationCompose(Application $application): array
    {
        if ($application->build_pack !== 'dockercompose') {
            return [];
        }

        $rawCompose = filled($application->docker_compose_raw)
            ? $application->docker_compose_raw
            : $application->docker_compose;

        if (blank($rawCompose)) {
            return [];
        }

        try {
            $parsedCompose = Yaml::parse($rawCompose);

            return is_array($parsedCompose) ? $parsedCompose : [];
        } catch (\Throwable) {
            return [];
        }
    }

    private function applicationEnvironmentMap(Application $application): array
    {
        if ($application->relationLoaded('environment_variables')) {
            return $application->environment_variables
                ->mapWithKeys(fn ($environmentVariable) => [$environmentVariable->key => (string) $environmentVariable->value])
                ->all();
        }

        if (! $application->exists) {
            return [];
        }

        return $application->environment_variables()
            ->get()
            ->mapWithKeys(fn ($environmentVariable) => [$environmentVariable->key => (string) $environmentVariable->value])
            ->all();
    }

    private function resolvePublishedPortForApplication(
        Application $application,
        ?int $requestedInternalPort,
        ?string $composeServiceName,
        array $compose,
        array $environmentMap
    ): ?int {
        if ($application->build_pack === 'dockercompose') {
            $serviceName = $composeServiceName;
            if (blank($serviceName)) {
                $serviceName = $application->uuid;
            }

            return $this->resolvePublishedPort($compose, $serviceName, $requestedInternalPort, $environmentMap);
        }

        $portMappings = $this->parsePortMappings($application->ports_mappings_array, $environmentMap)
            ->filter(fn (array $mapping) => ! is_null($mapping['published']))
            ->values();

        if ($portMappings->isEmpty()) {
            return null;
        }

        $fallbackInternalPort = null;
        if (is_null($requestedInternalPort)) {
            $mainPorts = $application->main_port();
            if (is_array($mainPorts) && count($mainPorts) === 1 && is_numeric($mainPorts[0])) {
                $fallbackInternalPort = (int) $mainPorts[0];
            }
        }

        return $this->selectPublishedPortFromMappings($portMappings, $requestedInternalPort, $fallbackInternalPort);
    }

    private function detectUnsupportedDomainProtocol(string $domain): ?string
    {
        $trimmedDomain = trim($domain);
        if ($trimmedDomain === '' || ! preg_match('/^[a-z][a-z0-9+\-.]*:\/\//i', $trimmedDomain)) {
            return null;
        }

        $protocol = strtolower((string) parse_url($trimmedDomain, PHP_URL_SCHEME));
        if ($protocol === '' || in_array($protocol, ['http', 'https'], true)) {
            return null;
        }

        return $protocol;
    }

    private function detectDockerNetworkOverlapWarningForResource(string $resourceType, string $resourceUuid, Server $edgeProxyServer, string $tunnelHost): ?string
    {
        // Only run this for persisted server models (normal runtime) to avoid noisy checks in synthetic test stubs.
        if (! $edgeProxyServer->exists) {
            return null;
        }

        $normalizedTunnelHost = trim($tunnelHost, '[]');
        if (! filter_var($normalizedTunnelHost, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
            return null;
        }

        foreach ($this->resolveEdgeDockerSubnets($edgeProxyServer) as $subnet) {
            if ($this->ipv4InCidr($normalizedTunnelHost, $subnet)) {
                return sprintf(
                    'Edge proxy route warning for %s %s: remote host %s overlaps edge Docker network subnet %s. This can break VPN/WireGuard routing. Configure Docker default-address-pools to a non-overlapping range (for example base 172.20.0.0/16 with size 24) and recreate overlapping networks.',
                    $resourceType,
                    $resourceUuid,
                    $normalizedTunnelHost,
                    $subnet
                );
            }
        }

        return null;
    }

    private function resolveEdgeDockerSubnets(Server $edgeProxyServer): array
    {
        try {
            $subnetsOutput = $this->runRemoteCommands($edgeProxyServer, [
                "docker network inspect \$(docker network ls -q) --format '{{range .IPAM.Config}}{{println .Subnet}}{{end}}' 2>/dev/null | sort -u || true",
            ], false);
        } catch (\Throwable) {
            return [];
        }

        if (! is_string($subnetsOutput) || trim($subnetsOutput) === '') {
            return [];
        }

        return collect(preg_split('/\R+/', $subnetsOutput) ?: [])
            ->map(fn (string $line) => trim($line))
            ->filter(fn (string $line) => preg_match('/^\d{1,3}(?:\.\d{1,3}){3}\/\d{1,2}$/', $line) === 1)
            ->values()
            ->all();
    }

    private function ipv4InCidr(string $ip, string $cidr): bool
    {
        [$networkIp, $prefixLength] = array_pad(explode('/', $cidr, 2), 2, null);
        if (! is_string($networkIp) || ! is_string($prefixLength)) {
            return false;
        }

        if (! filter_var($networkIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
            return false;
        }

        if (! preg_match('/^\d+$/', $prefixLength)) {
            return false;
        }

        $prefixLength = (int) $prefixLength;
        if ($prefixLength < 0 || $prefixLength > 32) {
            return false;
        }

        $ipLong = ip2long($ip);
        $networkLong = ip2long($networkIp);
        if ($ipLong === false || $networkLong === false) {
            return false;
        }

        if ($prefixLength === 0) {
            return true;
        }

        $mask = -1 << (32 - $prefixLength);

        return ($ipLong & $mask) === ($networkLong & $mask);
    }

    private function parseDomainUrl(string $domain): ?Url
    {
        $normalizedDomain = trim($domain);
        if ($normalizedDomain === '') {
            return null;
        }

        if (! Str::startsWith($normalizedDomain, ['http://', 'https://'])) {
            $normalizedDomain = 'https://'.$normalizedDomain;
        }

        try {
            $url = Url::fromString($normalizedDomain, ['http', 'https']);
            if ($url->getHost() === '') {
                return null;
            }

            return $url;
        } catch (\Throwable) {
            return null;
        }
    }

    private function resolvePublishedPort(array $compose, string $serviceName, ?int $requestedInternalPort, array $environmentMap): ?int
    {
        $ports = $this->resolveComposeServicePorts($compose, $serviceName);
        if (! is_array($ports)) {
            return null;
        }

        $portMappings = $this->parsePortMappings($ports, $environmentMap)
            ->filter(fn (array $mapping) => ! is_null($mapping['published']))
            ->values();

        if ($portMappings->isEmpty()) {
            return null;
        }

        return $this->selectPublishedPortFromMappings($portMappings, $requestedInternalPort);
    }

    private function selectPublishedPortFromMappings(Collection $portMappings, ?int $requestedInternalPort, ?int $fallbackInternalPort = null): ?int
    {
        if (! is_null($requestedInternalPort)) {
            $matchingTarget = $portMappings->first(fn (array $mapping) => $mapping['target'] === $requestedInternalPort);
            if ($matchingTarget) {
                return $matchingTarget['published'];
            }

            $matchingPublished = $portMappings->first(fn (array $mapping) => $mapping['published'] === $requestedInternalPort);
            if ($matchingPublished) {
                return $matchingPublished['published'];
            }
        }

        if (! is_null($fallbackInternalPort)) {
            $matchingTarget = $portMappings->first(fn (array $mapping) => $mapping['target'] === $fallbackInternalPort);
            if ($matchingTarget) {
                return $matchingTarget['published'];
            }
        }

        if ($portMappings->count() === 1) {
            return $portMappings->first()['published'];
        }

        return null;
    }

    private function resolveComposeServicePorts(array $compose, string $serviceName): ?array
    {
        $services = data_get($compose, 'services', []);
        if (! is_array($services) || empty($services)) {
            return null;
        }

        if (array_key_exists($serviceName, $services)) {
            $ports = data_get($services[$serviceName], 'ports');

            return is_array($ports) ? $ports : null;
        }

        $normalizedServiceName = str($serviceName)->replace('-', '_')->replace('.', '_')->value();
        foreach ($services as $composeServiceName => $serviceConfig) {
            $normalizedComposeServiceName = str((string) $composeServiceName)->replace('-', '_')->replace('.', '_')->value();
            if ($normalizedComposeServiceName !== $normalizedServiceName) {
                continue;
            }

            $ports = data_get($serviceConfig, 'ports');

            return is_array($ports) ? $ports : null;
        }

        // Defensive fallback for templates where application name does not match compose key.
        $servicesWithPorts = collect($services)
            ->filter(fn (mixed $serviceConfig) => is_array($serviceConfig) && is_array(data_get($serviceConfig, 'ports')) && ! empty(data_get($serviceConfig, 'ports')))
            ->values();

        if ($servicesWithPorts->count() === 1) {
            return data_get($servicesWithPorts->first(), 'ports');
        }

        return null;
    }

    private function parsePortMappings(array $ports, array $environmentMap): Collection
    {
        $mappings = collect();

        foreach ($ports as $portDefinition) {
            if (is_array($portDefinition)) {
                $protocol = strtolower((string) data_get($portDefinition, 'protocol', 'tcp'));
                if ($protocol === 'udp') {
                    continue;
                }

                $target = $this->resolvePortValue(data_get($portDefinition, 'target'), $environmentMap);
                $published = $this->resolvePortValue(data_get($portDefinition, 'published'), $environmentMap);

                if (! is_null($target) || ! is_null($published)) {
                    $mappings->push([
                        'target' => $target,
                        'published' => $published,
                    ]);
                }

                continue;
            }

            if (is_string($portDefinition) || is_int($portDefinition)) {
                $mapping = $this->parsePortMappingFromString((string) $portDefinition, $environmentMap);
                if (! is_null($mapping)) {
                    $mappings->push($mapping);
                }
            }
        }

        return $mappings;
    }

    private function parsePortMappingFromString(string $portDefinition, array $environmentMap): ?array
    {
        $normalizedPortDefinition = trim($portDefinition);
        if ($normalizedPortDefinition === '') {
            return null;
        }

        if (preg_match('/\/(tcp|udp)$/i', $normalizedPortDefinition, $protocolMatches)) {
            if (strtolower($protocolMatches[1]) === 'udp') {
                return null;
            }

            $normalizedPortDefinition = preg_replace('/\/(tcp|udp)$/i', '', $normalizedPortDefinition) ?? $normalizedPortDefinition;
        }

        if (str_contains($normalizedPortDefinition, ':')) {
            $segments = $this->splitPortDefinitionSegments($normalizedPortDefinition);
            if (count($segments) < 2) {
                return null;
            }

            $containerPort = $this->resolvePortValue(array_pop($segments), $environmentMap);
            $hostPort = $this->resolvePortValue(array_pop($segments), $environmentMap);

            return [
                'target' => $containerPort,
                'published' => $hostPort,
            ];
        }

        return [
            'target' => $this->resolvePortValue($normalizedPortDefinition, $environmentMap),
            'published' => null,
        ];
    }

    private function splitPortDefinitionSegments(string $portDefinition): array
    {
        $segments = [];
        $currentSegment = '';
        $braceDepth = 0;
        $length = strlen($portDefinition);

        for ($index = 0; $index < $length; $index++) {
            $character = $portDefinition[$index];

            if ($character === '{') {
                $braceDepth++;
            } elseif ($character === '}' && $braceDepth > 0) {
                $braceDepth--;
            }

            if ($character === ':' && $braceDepth === 0) {
                $segments[] = $currentSegment;
                $currentSegment = '';

                continue;
            }

            $currentSegment .= $character;
        }

        $segments[] = $currentSegment;

        return $segments;
    }

    private function resolvePortValue(mixed $rawPortValue, array $environmentMap): ?int
    {
        if (is_int($rawPortValue)) {
            return $rawPortValue;
        }

        $normalizedPortValue = trim((string) $rawPortValue);
        if ($normalizedPortValue === '') {
            return null;
        }

        // Ignore numeric port ranges (for example 8000-8010), which cannot be mapped deterministically.
        if (preg_match('/^\d+\s*-\s*\d+$/', $normalizedPortValue) === 1) {
            return null;
        }

        if (preg_match('/^\d+$/', $normalizedPortValue)) {
            return (int) $normalizedPortValue;
        }

        if (
            preg_match(
                '/^\$\{([A-Za-z_][A-Za-z0-9_]*)(?:(:?[-?])([^}]*))?\}$/',
                $normalizedPortValue,
                $matches
            )
        ) {
            $environmentKey = $matches[1];
            $defaultPort = trim((string) ($matches[3] ?? ''));

            $resolvedEnvironmentPort = $environmentMap[$environmentKey] ?? null;
            if (! is_null($resolvedEnvironmentPort) && is_numeric(trim((string) $resolvedEnvironmentPort))) {
                return (int) trim((string) $resolvedEnvironmentPort);
            }

            if ($defaultPort !== '' && is_numeric($defaultPort)) {
                return (int) $defaultPort;
            }

            return null;
        }

        if (preg_match('/^\$([A-Za-z_][A-Za-z0-9_]*)$/', $normalizedPortValue, $matches)) {
            $environmentKey = $matches[1];
            $resolvedEnvironmentPort = $environmentMap[$environmentKey] ?? null;
            if (! is_null($resolvedEnvironmentPort) && is_numeric(trim((string) $resolvedEnvironmentPort))) {
                return (int) trim((string) $resolvedEnvironmentPort);
            }

            return null;
        }

        if (array_key_exists($normalizedPortValue, $environmentMap) && is_numeric(trim((string) $environmentMap[$normalizedPortValue]))) {
            return (int) trim((string) $environmentMap[$normalizedPortValue]);
        }

        return null;
    }

    private function logWarning(string $message): void
    {
        $container = Container::getInstance();
        if ($container instanceof Container && $container->bound('log')) {
            $container->make('log')->warning($message);

            return;
        }

        error_log($message);
    }

    private function normalizeRemoteHost(string $rawHost): ?string
    {
        $host = trim($rawHost);
        if ($host === '') {
            return null;
        }

        // Allow values like https://10.8.0.15:8080/path and extract only host.
        if (Str::startsWith($host, ['http://', 'https://'])) {
            $parsedHost = parse_url($host, PHP_URL_HOST);
            $host = is_string($parsedHost) ? $parsedHost : '';
        } elseif (str_contains($host, '/')) {
            $parsedHost = parse_url('http://'.$host, PHP_URL_HOST);
            $host = is_string($parsedHost) ? $parsedHost : '';
        }

        $host = trim($host, '[]');
        if ($host === '') {
            return null;
        }

        // Drop accidental host:port values so published compose port remains authoritative.
        if (str_contains($host, ':') && ! filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
            $parsedHost = parse_url('http://'.$host, PHP_URL_HOST);
            $host = is_string($parsedHost) ? $parsedHost : '';
        }

        if ($host === '') {
            return null;
        }

        if (filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
            return '['.$host.']';
        }

        return $host;
    }
}