<?php
#  if(!isset($_POST["y"]))
#  {
#    header("Location:.");
#    exit;
#  }

/**
 * @brief connects to the database
 * @return a PDO connection to the database
 */
function connect()
{
    try
    {
        $pdo = new PDO("sqlite:testdb.db");
        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        return $pdo;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries all the categories from the dabase
 * @param $db: the PDO connection to the database
 * @return al list of all the categories (id, name)
 */
function getCategories($db)
{
    try
    {
        $request = $db->prepare('SELECT * FROM categorie NATURAL JOIN sous_categorie ORDER BY sous_cat_tab ASC, sous_cat_id ASC');
        $request->execute();
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries all the sub categories from a certain tab
 * @param $db: the PDO connection to the database
 * @param $tab: the ID of the tab
 * @return a list of the subcategories for $tab
 */
function getSousCategories($db, $tab)
{
    try
    {
        $request = $db->prepare('SELECT * FROM sous_categorie WHERE sous_cat_tab = ? ORDER BY sous_cat_id ASC');
        $request->execute(array($tab));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries all the categories from a subcategorie
 * @param $db: the PDO connection to the database
 * @param $sous_cat_id: the ID of the subcategorie
 * @return a list of the categories for the subcategorie
 */
function getCategoriesBySousCategorie($db, $sous_cat_id)
{
    try
    {
        $request = $db->prepare('SELECT * FROM categorie WHERE sous_cat_id = ? ORDER BY cat_id ASC');
        $request->execute(array($sous_cat_id));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries all the events from the database
 * @param $db: the PDO connection to the database
 * @return a list of all the events in the database
 */
function getAllEvents($db)
{
    try
    {
        $request = $db->prepare('SELECT * FROM event NATURAL JOIN eventCategorie NATURAL JOIN categorie');
        $request->execute(array('date'=>date("Y-m-d",$date)));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries the database for one particular event
 * @param $db: the PDO connection to the database
 * @param $id: the ID of the event to query
 * @return an array containing the event
 */
function getOneEvent($db, $id)
{
    try
    {
        $request = $db->prepare('SELECT * FROM event WHERE event_id = ?');
        $request->execute(array($id));
        $result = $request->fetch();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

function getCategoriesForOneEvent($db, $eventId)
{
    try
    {
        $request = $db->prepare('SELECT * FROM eventCategorie NATURAL JOIN categorie NATURAL JOIN sous_categorie ORDER BY sous_cat_tab ASC, sous_cat_id ASC WHERE event_id = ?');
        $request->execute(array($id));
        $result = $request->fetch();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries the database for the events on a certain date
 * @param $db: the PDO connection to the database
 * @param $date: the date to search for (please use strtotime)
 * @return a list of all the events at the date $date
 */
function getEventsByDate($db, $date)
{
    try
    {
        $request = $db->prepare('SELECT * FROM event WHERE (event_dtstart <= :date_max AND event_dtend >= :date_min)');
        $request->execute(array('date_max'=>date("Y-m-d 23:59:59",$date),
                                'date_min'=>date("Y-m-d 00:00:00",$date)));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries the database for the events on a certain date, where the categories are matched
 * @param $db: the PDO connection to the database
 * @param $date: the date to search for
 * @param $categories: an array containing the IDs of the categories
 * @return a list of all the events of the different categories at the date $date
 */
function getEventsByDateAndCategories($db, $date, $categories)
{
    try
    {
        $request = $db->prepare('SELECT * FROM event NATURAL JOIN eventCategorie NATURAL JOIN categorie WHERE (dtstart <= :date AND dtend >= :date) AND events.categorie IN (:categories)');
        $request->execute(array(
                                    'date'=>date("Y-m-d",$date),
                                    'categories'=>implode(',', array_map('intval', $categories))
        ));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

/**
 * @brief queries the database for the events after a certain date
 * @param $db: the PDO connection to the database
 * @param $date: the date to search for
 * @return a list of all the events future to $date
 */
function getEventsSince($db,$date)
{
    try
    {
        $request = $db->prepare('SELECT * FROM event WHERE (event_dtstart >= :date OR event_dtend >= :date)');
        $request->execute(array('date'=>date("Y-m-d",$date)));
        $result = $request->fetchAll();
        $request->closeCursor();
        return $result;
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}

function addEvent($db, $titre, $localisation, $dtstart, $dtend, $description, $url, $urlImage, $contact)
{
    try
    {
        $request = $db->prepare('INSERT INTO event(event_title, event_localisation, event_dtstart , event_dtend, event_description, event_url, event_urlImage,  event_contact) VALUES(:title, :localisation, :dstart, :dtend, :description, :url, :urlImage, :contact)');
        $request->execute(array('title'=>$titre,
                                'localisation'=>$localisation,
                                'dtend'=>date("Y-m-d hh:mm:ss",$dtstart),
                                'dstart'=>date("Y-m-d hh:mm:ss",$dtend),
                                'description'=>$description,
                                'url'=>$url,
                                'urlImage'=>$urlImage,
                                'contact'=>$contact));
        $request->closeCursor();
    }
    catch(PDOException $e)
    {
        //NOTE: change $e->getMessage() by an error message before going to production
        echo($e->getMessage());
        die();
    }
}
?>