<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldBeUnique;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use Illuminate\Support\Facades\Log;

use App\Http\Controllers\DomainController;
use App\Models\{Address,Domain,Nodelist,System,Zone};
use App\Traits\Import as ImportTrait;

class NodelistImport implements ShouldQueue
{
	use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
	use ImportTrait;

	protected const LOGKEY = 'JIN';
	private const importkey = 'nodelist';
	private string $file;
	private Domain $do;
	private Nodelist $no;
	private bool $deletefile = FALSE;

	/**
	 * Import Nodelist constructor.
	 *
	 * @param Domain $do
	 * @param Nodelist $no
	 * @param string $file
	 * @param bool $delete
	 */
	public function __construct(Domain $do,Nodelist $no,string $file,bool $delete=TRUE)
	{
		$this->do = $do;
		$this->no = $no;
		$this->file = $file;

		if ($delete)
			$no->addresses()->detach();
	}

	/**
	 * Execute the job.
	 *
	 * @return void
	 * @throws \Exception
	 */
	public function handle()
	{
		// Get the file from the host
		$file = $this->getFileFromHost('',self::importkey,$this->file);
		$lines = $this->getFileLines($file);
		Log::debug(sprintf('%s:Processing [%d] lines.',static::LOGKEY,$lines));

		$fh = fopen($file,'r');
		$p = $c =0;

		$region = NULL;
		$host = NULL;
		$hub_id = NULL;
		$zo = NULL;

		while (! feof($fh)) {
			$line = stream_get_line($fh, 0, "\r\n");

			// Lines beginning with a semicolon(;) are comments
			if (preg_match('/^;/',$line) OR ($line == chr(0x1a)))
				continue;

			// Remove any embedded CR and BOM
			$line = str_replace("\r",'',$line);
			$line = preg_replace('/^\x{feff}/u','',$line);
			$c++;

			$fields = str_getcsv(trim($line));

			// First field is either zone,region,host,hub,down,pvt (or blank)
			if ($fields[0] AND ! in_array($fields[0],Nodelist::definitions)) {
				Log::error(sprintf('%s:Invalid field zero [%s] - IGNORING record (%s)',self::LOGKEY,$fields[0],$line));
				continue;
			}

			$node = 0;

			switch ($fields[0]) {
				case 'Zone': $zone = $fields[1];
					// We ignore the Zone entries, since they are dynamically created.
					Zone::unguard();
					$zo = Zone::firstOrNew([
						'zone_id'=>$zone,
						'domain_id'=>$this->do->id,
						'active'=>TRUE,
					]);
					Zone::reguard();

					$region = 0;
					$host = $fields[1];
					$hub_id = NULL;
					$role = DomainController::NODE_ZC;

					break;

				case 'Region':
					$region = $fields[1];
					$role = DomainController::NODE_RC;
					$host = 0;
					$hub_id = NULL;

					break;

				case 'Host':
					$host = $fields[1];
					$hub_id = NULL;
					$role = DomainController::NODE_NC;

					// We ignore the Host entries, since they are dynamically created.
					continue 2;

				case 'Hub':
					$node = $fields[1];
					$role = DomainController::NODE_HC;

					break;

				case 'Pvt':
					$node = $fields[1];
					$role = DomainController::NODE_PVT;

					break;

				case 'Hold':
					$node = $fields[1];
					$role = DomainController::NODE_HOLD;

					break;

				case 'Down':
					$node = $fields[1];
					$role = DomainController::NODE_DOWN;

					break;

				case '':
					$node = $fields[1];
					break;

				default:
					Log::error(sprintf('%s:Unhandled first field [%s]',self::LOGKEY,$fields[0]));
					continue 2;
			}

			if (! $zone) {
				Log::error(sprintf('%s:Zone NOT set, ignoring record...',self::LOGKEY));
				continue;
			}

			Address::unguard();
			$ao = Address::firstOrNew([
				'region_id' => $region,
				'host_id' => $host,
				'node_id' => $node,
				'point_id' => 0,
			]);
			Address::reguard();

			$ao->active = TRUE;
			$ao->role = $role;
			$ao->hub_id = $hub_id;

			$role = NULL;

			if ($ao->exists)
				Log::debug(sprintf('%s:Processing existing address [%s]',self::LOGKEY,$ao->ftn));

			$sysop = trim(str_replace('_',' ',$fields[4]));
			$system = trim(str_replace('_',' ',$fields[2]));
			$location = trim(str_replace('_',' ',$fields[3]));

			// Get the System
			if ($ao->system_id && (($ao->system->sysop === $sysop) || ($ao->system->name === $system))) {
				$so = $ao->system;

				// If the sysop name is different
				if ($so->sysop !== $sysop) {
					Log::debug(sprintf('%s:Sysop Name changed for BBS [%s:%s] from [%s] to [%s]',
						self::LOGKEY,$so->id,$so->name,$so->sysop,$sysop));

					$so->sysop = $sysop;

				// We have the same name has changed.
				} elseif ($so->name !== $system) {
					Log::debug(sprintf('%s:System Name changed for BBS [%s:%s] to [%s]',
						self::LOGKEY,$so->id,$so->name,$system));

					$so->name = $system;
				}

			// We'll search and see if we already have that system
			} else {
				$so = System::where('name',$system)
					->where('sysop',$sysop)
					->firstOrNew();

				if ($so->exists)
					Log::debug(sprintf('%s:Linking address [%d:%d/%d] to [%s:%s]',self::LOGKEY,$zo->zone_id,$ao->host_id,$ao->node_id,$so->id,$so->name));
				else
					Log::debug(sprintf('%s:New System [%s] with address [%d:%d/%d]',self::LOGKEY,$system,$zo->zone_id,$ao->host_id,$ao->node_id));

				$so->name = $system;
				$so->sysop = $sysop;
				$so->active = TRUE;

				if (! $so->exists)
					$so->notes = sprintf('Created by Nodelist Import: %d',$this->no->id);
			}

			$so->location = $location;
			/*
			if (! in_array($fields[5],['-Unpublished-']))
				$so->phone = $fields[5];

			$so->baud = $fields[6];
			*/

			// Save the system record
			$so->save();

			// If our zone didnt exist, we'll create it with this system
			if (! $zo->exists) {
				$zo->system_id = $so->id;
				$zo->save();
			}

			$ao->zone_id = $zo->id;

			if ($ao->getDirty())
				$p++;

			try {
				$so->addresses()->save($ao);
				if ($role == DomainController::NODE_HC)
					$hub_id = $ao->id;

				$this->no->addresses()->attach($ao,['role'=>$role]);

			} catch (\Exception $e) {
				Log::error(sprintf('%s:Error with line [%s] (%s)',self::LOGKEY,$line,$e->getMessage()),['fields'=>$fields]);
				throw new \Exception($e->getMessage());
			}

			if (! ($c % 100)) {
				Log::notice(sprintf('%s:Processed [%s] records',self::LOGKEY,$c),['memory'=>memory_get_usage(TRUE)]);
			}
		}

		fclose($fh);

		if ($this->deletefile and $c)
			unlink($file);

		Log::info(sprintf('%s:Updated %d records from %d systems',self::LOGKEY,$p,$c));
	}
}