<?php

class Team
{
	private $id;
	private $name;
	private $trigram;
	private $problem;
	private $encadrant;
	private $participants;
	private $inscription_date;
	private $allow_publish;
	private $validation_status;
	private $video_team_ids;
	private $access_code;
	private $year;

	private function __construct() {}

	/**
	 * @param $id
	 * @return Team|null
	 */
	public static function fromId($id)
	{
		global $DB;
		$req = $DB->prepare("SELECT * FROM `teams` WHERE `id` = ?;");
		$req->execute([htmlspecialchars($id)]);
		$data = $req->fetch();

		if ($data === false)
			return null;

		$team = new Team();
		$team->fill($data);
		return $team;
	}

	/**
	 * @param $trigram
	 * @return Team|null
	 */
	public static function fromTrigram($trigram)
	{
		global $DB, $YEAR;
		$req = $DB->prepare("SELECT * FROM `teams` WHERE `trigram` = ? AND `year` = $YEAR;");
		$req->execute([htmlspecialchars($trigram)]);
		$data = $req->fetch();

		if ($data === false)
			return null;

		$team = new Team();
		$team->fill($data);
		return $team;
	}

	public static function fromAccessCode($access_code)
	{
		global $DB, $YEAR;
		$req = $DB->prepare("SELECT * FROM `teams` WHERE `access_code` = ? AND `year` = $YEAR;");
		$req->execute([htmlspecialchars($access_code)]);
		$data = $req->fetch();

		if ($data === false)
			return null;

		$team = new Team();
		$team->fill($data);
		return $team;
	}

	public static function getAllTeams($problem = -1, $only_validated = false, $only_with_solutions = true)
	{
		global $DB, $YEAR;
		$req = $DB->prepare("SELECT * FROM `teams` WHERE " . ($problem < 0 ? "" : "`problem` = ? AND ") . ($only_validated ? "`validation_status` = 'VALIDATED' AND " : "") .  "`year` = $YEAR;");
		$req->execute([htmlspecialchars($problem)]);

		$teams = [];

		while (($data = $req->fetch()) != false) {
			$team = new Team();
			$team->fill($data);
			$sol = $team->getSolution();
			if ($sol != null && $sol->getValidation() == ValidationStatus::VALIDATED - 1)
				$teams[] = $team;
		}

		return $teams;
	}

	private function fill($data)
	{
		$this->id = $data["id"];
		$this->name = $data["name"];
		$this->trigram = $data["trigram"];
		$this->problem = $data["problem"];
		$this->encadrant = $data["encadrant"];
		$this->participants = [$data["participant_1"], $data["participant_2"], $data["participant_3"], $data["participant_4"], $data["participant_5"]];
		$this->inscription_date = $data["inscription_date"];
		$this->allow_publish = $data["allow_publish"] ? 1 : 0;
		$this->validation_status = ValidationStatus::fromName($data["validation_status"]);
		$this->video_team_ids = [$data["video_team1"], $data["video_team2"]];
		$this->access_code = $data["access_code"];
		$this->year = $data["year"];
	}

	public function getId()
	{
		return $this->id;
	}

	public function getName()
	{
		return $this->name;
	}

	public function setName($name)
	{
		global $DB;
		$this->name = $name;
		$DB->prepare("UPDATE `teams` SET `name` = ? WHERE `id` = ?;")->execute([$name, $this->id]);
	}

	public function getTrigram()
	{
		return $this->trigram;
	}

	public function setTrigram($trigram)
	{
		global $DB;
		$this->trigram = $trigram;
		$DB->prepare("UPDATE `teams` SET `trigram` = ? WHERE `id` = ?;")->execute([$trigram, $this->id]);
	}

	public function getProblem()
	{
		return $this->problem;
	}

	public function setProblem($problem)
	{
		global $DB;
		$this->problem = $problem;
		$DB->prepare("UPDATE `teams` SET `problem` = ? WHERE `id` = ?;")->execute([$problem, $this->id]);
	}

	public function getEncadrantId()
	{
		return $this->encadrant;
	}

	public function setEncadrant($encadrant)
	{
		global $DB;
		$this->encadrant = $encadrant;
		/** @noinspection SqlResolve */
		$DB->prepare("UPDATE `teams` SET `encadrant` = ? WHERE `id` = ?;")->execute([$encadrant, $this->id]);
	}

	public function getParticipants()
	{
		return $this->participants;
	}

	public function setParticipant($i, $participant)
	{
		global $DB;
		$this->participants[$i - 1] = $participant;
		/** @noinspection SqlResolve */
		$DB->prepare("UPDATE `teams` SET `participant_$i` = ? WHERE `id` = ?;")->execute([$participant, $this->id]);
	}

	public function getInscriptionDate()
	{
		return $this->inscription_date;
	}

	public function allowPublish()
	{
		return $this->allow_publish;
	}

	public function setAllowPublish($allow_publish)
	{
		global $DB;
		$this->allow_publish = $allow_publish;
		$DB->prepare("UPDATE `teams` SET `allow_publish` = ? WHERE `id` = ?;")->execute([$allow_publish ? 1 : 0, $this->id]);
	}

	public function getValidationStatus()
	{
		return $this->validation_status;
	}

	public function setValidationStatus($status)
	{
		global $DB;
		$this->validation_status = $status;
		$DB->prepare("UPDATE `teams` SET `validation_status` = ? WHERE `id` = ?;")->execute([ValidationStatus::getName($status), $this->id]);
	}

	public function getSolution()
	{
		return Video::getVideo(Reason::SOLUTION, $this);
	}

	public function getVideoTeamIds()
	{
		return $this->video_team_ids;
	}

	public function setVideoTeamIds($video_team_ids)
	{
		global $DB;
		ensure(sizeof($video_team_ids) == 2, "Une équipe doit recevoir exactement deux vidéos.");
		$this->video_team_ids = $video_team_ids;
		$DB->prepare("UPDATE `teams` SET `video_team1` = ?, `video_team2` = ? WHERE `id` = ?;")->execute([$video_team_ids[0], $video_team_ids[1], $this->id]);
	}

	public function getAccessCode()
	{
		return $this->access_code;
	}

	public function getYear()
	{
		return $this->year;
	}

	public function getAllDocuments()
	{
		global $DB;
		$req = $DB->query("SELECT * FROM `documents` AS `t1` "
			. "INNER JOIN (SELECT `team`, MAX(`uploaded_at`) AS `last_upload`, COUNT(`user`) AS `version` FROM `documents` GROUP BY `problem`, `user`, `team`) `t2` "
			. "ON `t1`.`team` = `t2`.`team` "
			. "WHERE `t1`.`uploaded_at` = `t2`.`last_upload` AND `t1`.`team` = $this->id;");

		$docs = [];

		while (($data = $req->fetch()) !== false)
			$docs[] = Document::fromData($data);

		return $docs;
	}

	public function getAllEmails()
	{
		$emails = [];
		if ($this->getEncadrantId() != null)
			$emails[] = User::fromId($this->getEncadrantId())->getEmail();

		foreach ($this->getParticipants() as $participantId) {
			if ($participantId != 0)
				$emails[] = User::fromId($participantId)->getEmail();
		}

		return $emails;
	}
}