<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Channel extends Model
{
	use HasFactory;

	public function getCurrentEpisode() {
		return $this->episodes()
			->where('start', '<', now()->subMinutes(10))
			->orderBy('start', 'DESC')
			->first();
	}

	public function getGuessingLeaderboard() {
		return $this->winners()->selectRaw('(select t2.uname from guessing_winners t2 where t2.uid = guessing_winners.uid order by created_at desc limit 1) as name, sum(score) as score')->groupBy('uid')->orderBy('score', 'desc')->limit(10)->get();
	}

	public function hasActiveGuessing() {
		return !is_null($this->guessing_start);
	}

	public function isAcceptingGuesses() {
		return !is_null($this->guessing_start) && is_null($this->guessing_end);
	}

	public function startGuessing($type) {
		$this->guessing_type = $type;
		$this->guessing_start = now();
		$this->save();
	}

	public function stopGuessing() {
		$this->guessing_end = now();
		$this->save();
	}

	public function getGuessingSetting($name, $default = null) {
		if (empty($this->guessing_settings) ||
		   	empty($this->guessing_type) ||
			!array_key_exists($this->guessing_type, $this->guessing_settings) ||
			!array_key_exists($name, $this->guessing_settings[$this->guessing_type])
		) {
			return $default;
		}
		return $this->guessing_settings[$this->guessing_type][$name];
	}

	public function solveGuessing($solution) {
		$start = $this->guessing_start;
		$end = is_null($this->guessing_end) ? now() : $this->guessing_end;
		$guesses = $this->guesses()->whereBetween('created_at', [$start, $end])->orderBy('created_at', 'ASC')->get();
		$unique_guesses = [];
		foreach ($guesses as $guess) {
			$unique_guesses[$guess->uid] = $guess;
		}
		$candidates = [];
		foreach ($unique_guesses as $guess) {
			if ($guess->guess == $solution) {
				$candidates[] = $guess;
			}
		}
		if (empty($candidates) && is_numeric($solution)) {
			$min_distance = null;
			foreach ($unique_guesses as $guess) {
				$distance = abs(intval($guess->guess) - intval($solution));
				if (is_null($min_distance) || $distance == $min_distance) {
					$candidates[] = $guess;
				} else if ($distance < $min_distance) {
					$candidates = [$guess];
					$min_distance = $distance;
				}
			}
		}
		$winners = [];
		$first = true;
		foreach ($candidates as $candidate) {
			$score = $this->scoreGuessing($solution, $candidate->guess, $first);
			$winner = new GuessingWinner();
			$winner->channel()->associate($this);
			$winner->pod = $start;
			$winner->uid = $candidate->uid;
			$winner->uname = $candidate->uname;
			$winner->guess = $candidate->guess;
			$winner->solution = $solution;
			$winner->score = $score;
			$winner->save();
			$winners[] = $winner;
			$first = false;
		}
		return $winners;
	}

	public function clearGuessing() {
		$this->guessing_start = null;
		$this->guessing_end = null;
		$this->save();
	}

	public function registerGuess($uid, $uname, $guess) {
		$model = new GuessingGuess();
		$model->channel()->associate($this);
		$model->uid = $uid;
		$model->uname = $uname;
		$model->guess = $guess;
		$model->save();
	}

	public function scoreGuessing($solution, $guess, $first) {
		if ($guess == $solution) {
			if ($first) {
				return $this->getGuessingSetting('points_exact_first', 1);
			}
			return $this->getGuessingSetting('points_exact_other', 1);
		}
		$distance = abs(intval($guess) - intval($solution));
		if ($distance <= $this->getGuessingSetting('points_close_max', 3)) {
			if ($first) {
				return $this->getGuessingSetting('points_close_first', 1);
			}
			return $this->getGuessingSetting('points_close_other', 1);
		}
		return 0;
	}

	public function isValidGuess($solution) {
		if ($this->guessing_type == 'gtbk') {
			$int_solution = intval($solution);
			return $int_solution > 0 && $int_solution < 23;
		}
		return false;
	}

	public function crews() {
		return $this->hasMany(ChannelCrew::class);
	}

	public function episodes() {
		return $this->belongsToMany(Episode::class)
			->using(Restream::class)
			->withPivot('accept_comms', 'accept_tracker');
	}

	public function guesses() {
		return $this->hasMany(GuessingGuess::class);
	}

	public function organization() {
		return $this->belongsTo(Organization::class);
	}

	public function winners() {
		return $this->hasMany(GuessingWinner::class);
	}

	protected $casts = [
		'chat' => 'boolean',
		'chat_commands' => 'array',
		'chat_settings' => 'array',
		'guessing_settings' => 'array',
		'guessing_start' => 'datetime',
		'guessing_end' => 'datetime',
		'languages' => 'array',
		'join' => 'boolean',
	];

	protected $hidden = [
		'created_at',
		'ext_id',
		'updated_at',
	];

}