<?php
/**
 * Pterodactyl - Panel
 * Copyright (c) 2015 - 2016 Dane Everitt <dane@daneeveritt.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
namespace Pterodactyl\Repositories;

use DB;
use Validator;

use Pterodactyl\Models;
use Pterodactyl\Services\UuidService;

use IPTools\Network;
use Pterodactyl\Exceptions\DisplayException;
use Pterodactyl\Exceptions\DisplayValidationException;

class NodeRepository {

    public function __construct()
    {
        //
    }

    public function create(array $data)
    {
        // Validate Fields
        $validator = Validator::make($data, [
            'name' => 'required|regex:/^([\w .-]{1,100})$/',
            'location' => 'required|numeric|min:1|exists:locations,id',
            'public' => 'required|numeric|between:0,1',
            'fqdn' => 'required|string|unique:nodes,fqdn',
            'scheme' => 'required|regex:/^(http(s)?)$/',
            'memory' => 'required|numeric|min:1',
            'memory_overallocate' => 'required|numeric|min:-1',
            'disk' => 'required|numeric|min:1',
            'disk_overallocate' => 'required|numeric|min:-1',
            'daemonBase' => 'required|regex:/^([\/][\d\w.\-\/]+)$/',
            'daemonSFTP' => 'required|numeric|between:1,65535',
            'daemonListen' => 'required|numeric|between:1,65535',
        ]);

        // Run validator, throw catchable and displayable exception if it fails.
        // Exception includes a JSON result of failed validation rules.
        if ($validator->fails()) {
            throw new DisplayValidationException($validator->errors());
        }

        // Verify the FQDN if using SSL
        if (filter_var($data['fqdn'], FILTER_VALIDATE_IP) && $data['scheme'] === 'https') {
            throw new DisplayException('A fully qualified domain name is required to use secure comunication on this node.');
        }

        // Verify FQDN is resolvable, or if not using SSL that the IP is valid.
        if (!filter_var(gethostbyname($data['fqdn']), FILTER_VALIDATE_IP)) {
            throw new DisplayException('The FQDN (or IP Address) provided does not resolve to a valid IP address.');
        }

        // Should we be nulling the overallocations?
        $data['memory_overallocate'] = ($data['memory_overallocate'] < 0) ? null : $data['memory_overallocate'];
        $data['disk_overallocate'] = ($data['disk_overallocate'] < 0) ? null : $data['disk_overallocate'];

        // Set the Secret
        $uuid = new UuidService;
        $data['daemonSecret'] = (string) $uuid->generate('nodes', 'daemonSecret');

        // Store the Data
        $node = new Models\Node;
        $node->fill($data);
        $node->save();

        return $node->id;

    }

    public function update($id, array $data)
    {
        $node = Models\Node::findOrFail($id);

        // Validate Fields
        $validator = $validator = Validator::make($data, [
            'name' => 'regex:/^([\w .-]{1,100})$/',
            'location' => 'numeric|min:1|exists:locations,id',
            'public' => 'numeric|between:0,1',
            'fqdn' => 'string|unique:nodes,fqdn,' . $id,
            'scheme' => 'regex:/^(http(s)?)$/',
            'memory' => 'numeric|min:1',
            'memory_overallocate' => 'numeric|min:-1',
            'disk' => 'numeric|min:1',
            'disk_overallocate' => 'numeric|min:-1',
            'daemonBase' => 'regex:/^([\/][\d\w.\-\/]+)$/',
            'daemonSFTP' => 'numeric|between:1,65535',
            'daemonListen' => 'numeric|between:1,65535',
            'reset_secret' => 'sometimes|accepted',
        ]);

        // Run validator, throw catchable and displayable exception if it fails.
        // Exception includes a JSON result of failed validation rules.
        if ($validator->fails()) {
            throw new DisplayValidationException($validator->errors());
        }

        // Verify the FQDN
        if (isset($data['fqdn'])) {

            // Verify the FQDN if using SSL
            if ((isset($data['scheme']) && $data['scheme'] === 'https') || (!isset($data['scheme']) && $node->scheme === 'https')) {
                if (filter_var($data['fqdn'], FILTER_VALIDATE_IP)) {
                    throw new DisplayException('A fully qualified domain name is required to use secure comunication on this node.');
                }
            }

            // Verify FQDN is resolvable, or if not using SSL that the IP is valid.
            if (!filter_var(gethostbyname($data['fqdn']), FILTER_VALIDATE_IP)) {
                throw new DisplayException('The FQDN (or IP Address) provided does not resolve to a valid IP address.');
            }

        }

        // Should we be nulling the overallocations?
        if (isset($data['memory_overallocate'])) {
            $data['memory_overallocate'] = ($data['memory_overallocate'] < 0) ? null : $data['memory_overallocate'];
        }

        if (isset($data['disk_overallocate'])) {
            $data['disk_overallocate'] = ($data['disk_overallocate'] < 0) ? null : $data['disk_overallocate'];
        }

        // Set the Secret
        if (isset($data['reset_secret'])) {
            $uuid = new UuidService;
            $data['daemonSecret'] = (string) $uuid->generate('nodes', 'daemonSecret');
            unset($data['reset_secret']);
        }

        // Store the Data
        return $node->update($data);

    }

    public function addAllocations($id, array $allocations)
    {
        $node = Models\Node::findOrFail($id);

        DB::beginTransaction();

        try {
            foreach($allocations as $rawIP => $ports) {
                $parsedIP = Network::parse($rawIP);
                foreach($parsedIP as $ip) {
                    foreach($ports as $port) {
                        if (!is_int($port) && !preg_match('/^(\d{1,5})-(\d{1,5})$/', $port)) {
                            throw new DisplayException('The mapping for ' . $port . ' is invalid and cannot be processed.');
                        }
                        if (preg_match('/^(\d{1,5})-(\d{1,5})$/', $port, $matches)) {
                            foreach(range($matches[1], $matches[2]) as $assignPort) {
                                $alloc = Models\Allocation::firstOrNew([
                                    'node' => $node->id,
                                    'ip' => $ip,
                                    'port' => $assignPort
                                ]);
                                if (!$alloc->exists) {
                                    $alloc->fill([
                                        'node' => $node->id,
                                        'ip' => $ip,
                                        'port' => $assignPort,
                                        'assigned_to' => null
                                    ]);
                                    $alloc->save();
                                }
                            }
                        } else {
                            $alloc = Models\Allocation::firstOrNew([
                                'node' => $node->id,
                                'ip' => $ip,
                                'port' => $port
                            ]);
                            if (!$alloc->exists) {
                                $alloc->fill([
                                    'node' => $node->id,
                                    'ip' => $ip,
                                    'port' => $port,
                                    'assigned_to' => null
                                ]);
                                $alloc->save();
                            }
                        }
                    }
                }
            }

            DB::commit();
            return true;
        } catch (\Exception $ex) {
            DB::rollBack();
            throw $ex;
        }
    }

    public function delete($id)
    {
        // @TODO: add logic;
        return true;
    }

}