<?php

namespace App\Models;

use App\TwitchBot\TokenizedMessage;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use LanguageDetection\Language;

class ChatLog extends Model {

	use HasFactory;

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

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

	public function tokenize() {
		return TokenizedMessage::fromLog($this);
	}

	public function getTextWithoutEmotes() {
		$text = $this->text_content;
		if (isset($this->tags['emotes']) && !empty($this->tags['emotes'])) {
			$emotes = explode('/', $this->tags['emotes']);
			foreach ($emotes as $emote) {
				$set = explode(':', $emote);
				$positions = explode(',', $set[1]);
				foreach ($positions as $position) {
					$coords = explode('-', $position);
					for ($i = intval($coords[0]); $i <= intval($coords[1]); ++$i) {
						$text[$i] = ' ';
					}
				}
			}
		}
		return trim(preg_replace('/\s+/', ' ', $text));
	}

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

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

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

	protected function evaluateUser() {
	}

	protected function evaluateChannel() {
		if (empty($this->params)) {
			return;
		}
		$cname = $this->params[0];
		if (substr($cname, 0, 1) != '#') {
			$cname = '#'.$cname;
		}
		$channel = Channel::firstWhere('twitch_chat', '=', $cname);
		if (!is_null($channel)) {
			$this->channel()->associate($channel);
			if (empty($this->twitch_category) && now()->sub(15, 'minute')->isBefore($this->created_at)) {
				$this->twitch_category = $channel->twitch_category;
			}
		}
	}

	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';
			}
		}
		$detector = (new Language($languages))->detect($this->getTextWithoutEmotes());
		$scores = $detector->close();
		$lang = strval($detector);
		//var_dump($scores, $lang, $this->text_content);
		if (!empty($lang) && $scores[$lang] > 0.4) {
			$this->detected_language = $lang;
		}
	}

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

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

}