<?php

class AppDB {

   const TABLE_TASKS = "tasks";
   const TABLE_WEATHER = "weather";

   const BOOLEANDB = 1000201;

   const DBVERSION = "A000001";

   private static $dbh = null;

   public static function getLastInsertId() {
       if ( is_null(self::$dbh) ) return 0;
       return self::$dbh->lastInsertId();
   }

   public static function getSTH($query = "") {
       if ( is_null(self::$dbh) ) self::getDBH();
       if ( $query == "" ) return false;
       return self::$dbh->prepare($query);
   }

   private static function getDBH() {
      if ( !is_null(self::$dbh) ) return self::$dbh;
      $dbh = new PDO("mysql:host=" . DBHOST . ";dbname=" . DBNAME, DBUSER, DBPASS);
      // Try to connect to the database
      try {
         if ( DBTYPE == "mysql" ) {
            $dbh = new PDO("mysql:host=" . DBHOST . ";dbname=" . DBNAME, DBUSER, DBPASS);
         } else if ( DBTYPE == "sqlite" ) {
            $dbh = new PDO("sqlite:" . SQLITEDB);
            $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            $dbh->exec("PRAGMA foreign_keys = ON");
         } else {
            throw new Exception("Bad database configuration in config file!");
            exit();
         }
      } catch (PDOException | Exception $e) {
         //header('Location: error_db.php?connection=');
         echo "Couldn't connect to DB!";
         exit();
      }

      self::$dbh = $dbh;
   }

}