<?php

namespace App\Classes;

use App\Models\Egg;
use App\Models\Nest;
use App\Models\Node;
use App\Models\Server;
use App\Models\Product;
use Exception;
use Illuminate\Http\Client\PendingRequest;
use Illuminate\Http\Client\Response;
use Illuminate\Support\Facades\Http;

class Pterodactyl
{
    //TODO: Extend error handling (maybe logger for more errors when debugging)

    /**
     * @return PendingRequest
     */
    public static function client()
    {
        return Http::withHeaders([
            'Authorization' => 'Bearer ' . config("SETTINGS::SYSTEM:PTERODACTYL:TOKEN"),
            'Content-type'  => 'application/json',
            'Accept'        => 'Application/vnd.pterodactyl.v1+json',
        ])->baseUrl(config("SETTINGS::SYSTEM:PTERODACTYL:URL") . '/api');
    }

    public static function clientAdmin()
    {
        return Http::withHeaders([
            'Authorization' => 'Bearer ' . config("SETTINGS::SYSTEM:PTERODACTYL:ADMIN_USER_TOKEN"),
            'Content-type'  => 'application/json',
            'Accept'        => 'Application/vnd.pterodactyl.v1+json',
        ])->baseUrl(config("SETTINGS::SYSTEM:PTERODACTYL:URL") . '/api');
    }
    /**
     * @return Exception
     */
    private static function getException(string $message = "", int $status = 0): Exception
    {
        if ($status == 404) {
            return new Exception("Ressource does not exist on pterodactyl - " . $message, 404);
        }

        if ($status == 403) {
            return new Exception("No permission on pterodactyl, check pterodactyl token and permissions - " . $message, 403);
        }

        if ($status == 401) {
            return new Exception("No pterodactyl token set - " . $message, 401);
        }

        if ($status == 500) {
            return new Exception("Pterodactyl server error - " . $message, 500);
        }

        return new Exception('Request Failed, is pterodactyl set-up correctly? - ' . $message);
    }

    /**
     * @param Nest $nest
     * @return mixed
     * @throws Exception
     */
    public static function getEggs(Nest $nest)
    {
        try {
            $response = self::client()->get("/application/nests/{$nest->id}/eggs?include=nest,variables&per_page=" . config("SETTINGS::SYSTEM:PTERODACTYL:PER_PAGE_LIMIT"));
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get eggs from pterodactyl - ", $response->status());
        return $response->json()['data'];
    }

    /**
     * @return mixed
     * @throws Exception
     */
    public static function getNodes()
    {
        try {
            $response = self::client()->get('/application/nodes?per_page=' . config("SETTINGS::SYSTEM:PTERODACTYL:PER_PAGE_LIMIT"));
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get nodes from pterodactyl - ", $response->status());
        return $response->json()['data'];
    }

    /**
     * @return mixed
     * @throws Exception
     * @description Returns the infos of a single node
     */
        public static function getNode($id) {
        try {
            $response = self::client()->get('/application/nodes/' . $id);
        } catch(Exception $e) {
            throw self::getException($e->getMessage());
        }
        if($response->failed()) throw self::getException("Failed to get node id " . $id . " - " . $response->status());
        return $response->json()['attributes'];
    }


    public static function getServers() {
        try {
            $response = self::client()->get('/application/servers?per_page=' . config("SETTINGS::SYSTEM:PTERODACTYL:PER_PAGE_LIMIT"));
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if($response->failed()) throw self::getException("Failed to get list of servers - ", $response->status());
        return $response->json()['data'];
    }

    /**
     * @return null
     * @throws Exception
     */
    public static function getNests()
    {
        try {
            $response = self::client()->get('/application/nests?per_page=' . config("SETTINGS::SYSTEM:PTERODACTYL:PER_PAGE_LIMIT"));
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get nests from pterodactyl", $response->status());
        return $response->json()['data'];
    }

    /**
     * @return mixed
     * @throws Exception
     */
    public static function getLocations()
    {
        try {
            $response = self::client()->get('/application/locations?per_page=' . config("SETTINGS::SYSTEM:PTERODACTYL:PER_PAGE_LIMIT"));
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get locations from pterodactyl - ", $response->status());

        return $response->json()['data'];
    }

    /**
     * @param Node $node
     * @return mixed
     * @throws Exception
     */
    public static function getFreeAllocationId(Node $node)
    {
        return self::getFreeAllocations($node)[0]['attributes']['id'] ?? null;
    }

    /**
     * @param Node $node
     * @return array|mixed|null
     * @throws Exception
     */
    public static function getFreeAllocations(Node $node)
    {
        $response = self::getAllocations($node);
        $freeAllocations = [];

        if (isset($response['data'])) {
            if (!empty($response['data'])) {
                foreach ($response['data'] as $allocation) {
                    if (!$allocation['attributes']['assigned']) array_push($freeAllocations, $allocation);
                }
            }
        }

        return $freeAllocations;
    }

    /**
     * @param Node $node
     * @return array|mixed
     * @throws Exception
     */
    public static function getAllocations(Node $node)
    {
        $per_page = config('SETTINGS::SERVER:ALLOCATION_LIMIT', 200);
        try {
            $response = self::client()->get("/application/nodes/{$node->id}/allocations?per_page={$per_page}");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get allocations from pterodactyl - ", $response->status());

        return $response->json();
    }

    /**
     * @param String $route
     * @return string
     */
    public static function url(string $route): string
    {
        return config("SETTINGS::SYSTEM:PTERODACTYL:URL") . $route;
    }

    /**
     * @param Server $server
     * @param Egg $egg
     * @param int $allocationId
     * @return Response
     */
    public static function createServer(Server $server, Egg $egg, int $allocationId)
    {
        return self::client()->post("/application/servers", [
            "name"           => $server->name,
            "external_id"    => $server->id,
            "user"           => $server->user->pterodactyl_id,
            "egg"            => $egg->id,
            "docker_image"   => $egg->docker_image,
            "startup"        => $egg->startup,
            "environment"    => $egg->getEnvironmentVariables(),
            "limits"         => [
                "memory" => $server->product->memory,
                "swap"   => $server->product->swap,
                "disk"   => $server->product->disk,
                "io"     => $server->product->io,
                "cpu"    => $server->product->cpu
            ],
            "feature_limits" => [
                "databases"   => $server->product->databases,
                "backups"     => $server->product->backups,
                "allocations" => $server->product->allocations,
            ],
            "allocation"     => [
                "default" => $allocationId
            ]
        ]);
    }

    public static function suspendServer(Server $server)
    {
        try {
            $response = self::client()->post("/application/servers/$server->pterodactyl_id/suspend");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to suspend server from pterodactyl - ", $response->status());

        return $response;
    }

    public static function unSuspendServer(Server $server)
    {
        try {
            $response = self::client()->post("/application/servers/$server->pterodactyl_id/unsuspend");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to unsuspend server from pterodactyl - ", $response->status());

        return $response;
    }

    /**
     * Get user by pterodactyl id
     * @param int $pterodactylId
     * @return mixed
     */
    public function getUser(int $pterodactylId)
    {
        try {
            $response = self::client()->get("/application/users/{$pterodactylId}");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        if ($response->failed()) throw self::getException("Failed to get user from pterodactyl - ", $response->status());

        return $response->json()['attributes'];
    }

    /**
     * Get serverAttributes by pterodactyl id
     * @param int $pterodactylId
     * @return mixed
     */
    public static function getServerAttributes(int $pterodactylId)
    {
        try {
            $response = self::client()->get("/application/servers/{$pterodactylId}?include=egg,node,nest,location");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }

        //print response body


        if ($response->failed()) throw self::getException("Failed to get server attributes from pterodactyl - ", $response->status());
        return $response->json()['attributes'];
    }

    /**
     * Update Server Resources
     * @param Server $server
     * @param Product $product
     * @return Response
     */
    public static function updateServer(Server $server, Product $product)
    {
        return self::client()->patch("/application/servers/{$server->pterodactyl_id}/build", [
            "allocation"      => $server->allocation,
            "memory"          => $product->memory,
            "swap"            => $product->swap,
            "disk"            => $product->disk,
            "io"              => $product->io,
            "cpu"             => $product->cpu,
            "threads"         => null,
            "feature_limits"  => [
                "databases"   => $product->databases,
                "backups"     => $product->backups,
                "allocations" => $product->allocations,
            ]
        ]);
    }
    /**
     * Power Action Specific Server
     * @param Server $server
     * @param string $action
     * @return Response
     */
    public static function powerAction(Server $server, $action)
    {
        return self::clientAdmin()->post("/client/servers/{$server->identifier}/power", [
            "signal"      => $action
        ]);
    }

    /**
     * Get info about user
     */
    public static function getClientUser()
    {
        return self::clientAdmin()->get("/client/account");
    }


    /**
     * Check if node has enough free resources to allocate the given resources
     * @param Node $node
     * @param int $requireMemory
     * @param int $requireDisk
     * @return boolean
     */
    public static function checkNodeResources(Node $node, int $requireMemory, int $requireDisk)
    {
        try {
            $response = self::client()->get("/application/nodes/{$node->id}");
        } catch (Exception $e) {
            throw self::getException($e->getMessage());
        }
        $node = $response['attributes'];
        $freeMemory = $node['memory'] - $node['allocated_resources']['memory'];
        $freeDisk = $node['disk'] - $node['allocated_resources']['disk'];
        if ($freeMemory < $requireMemory) {
            return false;
          }
          if ($freeDisk < $requireDisk) {
            return false;
          }
          return true;
    }
}