<?php

//TODO: get the exercice number

if(!defined('ONYX')) exit;

class Exercice
{
  var $id = null;
  var $number;
  var $theme;
  var $require;
  var $level;
  var $points;
  var $statement;
  var $files = array();
  var $keys = array();

  function Exercice($id=null)
  {
    if (!empty($id))
    {
      $db = new BDD();
      // TODO escape id ?
      $res = $db->unique_query("SELECT `id`, `id_theme`, `require`, `level`, `points`, `statement`
        			FROM exercices
        			WHERE id= '$id'");

      if (!empty($res))
      {
	$this->files = $db->query("SELECT `id`, `path`, `name`
				   FROM exercice_files
        			   WHERE id_exercice = '$id'");
	$this->keys = $db->query("SELECT `id`, `format`, `value`
        			  FROM exercice_keys
        			  WHERE id_exercice = '$id'");

        $db->deconnexion();

	$this->id = $res['id'];
	$this->theme = new Theme($res['id_theme']);
	$this->require = $res['require'];
	$this->level = $res['level'];
	$this->points = $res['points'];
	$this->statement = $res['statement'];

        $this->set_number();
      }
      else
      {
        $db->deconnexion();
      }
    }
  }

  // retourne le nombre d'equipes qui ont résolues l'exercice
  // trié par date
  function get_solved()
  {
      $db = new BDD();

      // TODO rename time by date in db ?
      $res = $db->query("SELECT `id_team`, `time` FROM solved
                         WHERE id_exercice= '$this->id'
                         ORDER BY time");

      $db->deconnexion();

      return $res;
  }

  function set_number()
  {
      if ($this->require == "")
          $this->number = 1;

      $exo = $this;
      $ret = 1;

      do
      {
        $exo = new Exercice($exo->require);
        $ret++;
      } while ($exo->require != "");

      $this->number = $ret;
  }

  function update($create)
  {
    $id = $this->id;
    $theme = intval($this->theme->get_id());
    $require = $this->require;
    $level = intval($this->level);
    $points = intval($this->points);
    $statement = $this->statement;
    $files = $this->files;
    $keys = $this->keys;

    $db = new BDD();
    $db->escape($id);
    $db->escape($theme);
    $db->escape($require);
    $db->escape($statement);

    if ($create)
    {
      $db->query("INSERT INTO exercices
     	  	  VALUES ('".$id."', '".$theme."', '".$require."', '".$level."', '".$points."','".$statement."');");
    }
    else
    {
      $db->query("UPDATE exercices
     	  	  SET `theme` = '".$theme."', `require` = '".$require."', `level` = '".$level."', `point` = '".$point."', `statement` = '".$statement."'
     	  	  WHERE id = '$id'");

      $aff = $db->affected();
    }

    foreach ($this->keys as $k => $key)
    {
      $format = $key['format'];
      $value = $key['value'];
      if (isset($key['id']))
	$kid = intval($key['id']);
      else
	$kid = 0;

      $db->escape($format);
      $db->escape($value);

      if (empty($kid))
      {
	$db->query("INSERT INTO exercice_keys
	            VALUES (NULL, '".$this->id."', '".$format."', UNHEX('".strhex($value)."'))");

	$this->keys[$k]['id'] = $db->insert_id();
      }
      else
      {
	$db->query("UPDATE exercice_keys
     	  	    SET `format` = '".$format."', `value` = UNHEX('".strhex($value).")')
     	  	    WHERE id = ".$kid);
      }
    }

    foreach ($this->files as $k => $file)
    {
      $path = $file['path'];
      $name = $file['name'];
      $sha1 = $file['sha1'];

      if (isset($file['id']))
	$fid = intval($file['id']);

      $db->escape($path);
      $db->escape($name);
      $db->escape($sha1);

      if (!isset($file['id']))
      {
	$db->query("INSERT INTO exercice_files
     	  	    VALUES (NULL, '".$id."', '".$path."', '".$name."', '".$sha1."');");

	$this->files[$k]['id'] = $db->insert_id();
      }
      else
      {
	$db->query("UPDATE exercice_files
	            SET `path` = '".$path."', `name` = '".$name."', `sha1` = '".$sha1."'
   	  	    WHERE id = ".$fid);
      }
    }

    $db->deconnexion();

    //FIXME
    return 1;
  }

  function create()
  {
    update(true);
  }

  function add_key($format, $value)
  {
    $this->keys[] = array(
      "format" => $format,
      "value" => $value
      );
  }

  function add_file($path, $name, $sha1)
  {
    $this->files[] = array(
      "path" => $path,
      "name" => $name,
      "sha1" => $sha1
      );
  }
}