<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use LanguageDetector\LanguageDetector;

class ChatLog extends Model {

	use HasFactory;

	public function channel() {
		return $this->belongsTo(Channel::class);
	}

	public function user() {
		return $this->belongsTo(User::class);
	}

	public function evaluate() {
		$this->evaluateUser();
		$this->evaluateChannel();

		if (is_null($this->nick)) {
			$this->type = 'system';
			return;
		}
		if (in_array($this->nick, ['horstiebot', 'localhorsttv'])) {
			$this->type = 'self';
			return;
		}

		if ($this->command == 'PRIVMSG') {
			if ($this->isKnownBot()) {
				$this->type = 'bot';
			} else if (substr($this->params[0], 0, 1) == '#') {
				$this->type = 'chat';
			} else {
				$this->type = 'dm';
			}
			$this->text_content = $this->params[1];
			$this->detectLanguage();
			if ($this->scanForSpam()) {
				$this->banned = true;
			}
			$this->classification = static::classify($this->text_content);
			return;
		}

		throw new \Exception('unidentified message');
	}

	public function isKnownBot() {
		return in_array(strtolower($this->nick), [
			'birrellthesquirrel',
			'funtoon',
			'nidbot2000',
			'nightbot',
			'pokemoncommunitygame',
			'speedgaming',
			'starbase47',
			'streamelements',
			'wizebot',
			'zockerstuebchen',
		]);
	}

	public static function classify($text) {
		if (empty($text)) {
			return 'unclassified';
		}
		if (is_numeric(trim($text))) {
			return 'number';
		}
		$rawText = strtolower(preg_replace('/[^\w]/', '', $text));
		$tokenizedText = preg_split('/\s+/', strtolower(trim($text)));
		if (Str::startsWith($rawText, 'gg') || Str::endsWith($rawText, 'gg')) {
			return 'gg';
		}
		if (Str::contains($rawText, ['glgl', 'glhf', 'hfgl'])) {
			return 'gl';
		}
		if (Str::contains($rawText, ['haha', 'hehe', 'hihi', 'kekw', 'lol', 'lul', 'xd'])) {
			return 'lol';
		}
		if (Str::startsWith($rawText, ['ahoi', 'hallo', 'hello', 'hi', 'huhu']) || Str::endsWith($rawText, ['hi', 'wave'])) {
			return 'hi';
		}
		if (Str::contains($rawText, ['pog', 'wow'])) {
			return 'pog';
		}
		if (Str::contains($rawText, ['hype'])) {
			return 'hype';
		}
		return 'unclassified';
	}

	protected function evaluateUser() {
	}

	protected function evaluateChannel() {
		if (empty($this->params)) {
			$this->channel()->associate(null);
			return;
		}
		$cname = $this->params[0];
		if (substr($cname, 0, 1) != '#') {
			$cname = '#'.$cname;
		}
		$channel = Channel::firstWhere('twitch_chat', '=', $cname);
		$this->channel()->associate($channel);
	}

	protected function detectLanguage() {
		$languages = ['de', 'en', 'es', 'fr'];
		if (!is_null($this->channel)) {
			$languages = array_values($this->channel->languages);
			if (!in_array('en', $languages)) {
				$languages[] = 'en';
			}
		}
		$detector = LanguageDetector::detect($this->text_content, $languages);
		$scores = $detector->getScores();
		$lang = strval($detector->getLanguage());
		//var_dump($scores, $lang, $this->text_content);
		if (is_array($scores) && isset($scores[$lang]) && $scores[$lang] > 0.35) {
			$this->detected_language = $lang;
		}
	}

	protected function scanForSpam() {
		if (substr($this->text_content, 0, 1) == '!') {
			return true;
		}
		if (strpos($this->text_content, '$') !== false) {
			return true;
		}
		if (strpos($this->text_content, '€') !== false) {
			return true;
		}
		if (strpos($this->text_content, '@') !== false) {
			return true;
		}
		if (strpos($this->text_content, '://') !== false) {
			return true;
		}
		if (is_numeric($this->text_content)) {
			return true;
		}
		if (strpos($this->text_content, 'followers') !== false) {
			return true;
		}
		if (strpos($this->text_content, 'promotion') !== false) {
			return true;
		}
		if (strpos($this->text_content, 'viewers') !== false) {
			return true;
		}
		if (strpos($this->text_content, 'view ers') !== false) {
			return true;
		}
		return false;
	}

	protected $casts = [
		'banned' => 'boolean',
		'params' => 'array',
		'tags' => 'array',
		'user_id' => 'string',
	];

	protected $fillable = [
		'command',
		'nick',
		'params',
		'tags',
	];

}