<?php

class Paginator {
  private $listCount = 5;
  private $limit;
  private $page = 1;
  private $count;
  private $pageCount;

  private $pageFrom;
  private $pageTo;

  public function setCount($count){
    if(!isset($this->count)){
      $this->count = intval($count);
    }
  }

  public function getCount(){
    return $this->count;
  }

  public function setLimit($limit){
    if(!isset($this->limit)){
      $this->limit = intval($limit);
    }
  }

  public function getLimit(){
    return $this->limit;
  }

  public function setPage($page){

    $pageCount = $this->getPageCount();

    if($page>1){
      $this->page = intval($page);

      if($pageCount<=$page){

        $this->page = intval($pageCount);
      }
    }


  }

  public function getPage(){

    return $this->page;
  }

  public function getPageCount(){
    if(!isset($this->pageCount)){
      return $this->pageCount = ceil($this->getCount()/$this->getLimit());
    }
    return $this->pageCount;
  }


  public function getOffset(){
    if(!isset($this->offset)){
      $page = $this->getPage();
      $limit = $this->getLimit();
      $pageCount = $this->getPageCount();

      $this->setPageFromTo($page,$limit,$pageCount);

      $this->offset = $page*$limit-$limit;
    }
    return $this->offset;

  }

  public function setPageFromTo($page,$limit,$pageCount){
      $pageFrom = $page-$this->listCount;
      $pageTo = $page+$this->listCount-1;

      if($pageFrom<1){
        $pageTo=$pageTo-$pageFrom+1;
      }

      if($pageTo>$pageCount){
        $pageFrom=$pageFrom+($pageCount-$pageTo);
      }

      if($pageFrom<1){
        $pageFrom=1;
      }

      if($pageTo>$pageCount){
        $pageTo=$pageCount;
      }

      $this->pageFrom = $pageFrom;
      $this->pageTo = $pageTo;
  }


  public function getPageFrom(){
    if(!isset($this->pageFrom)){
      $this->getOffset();
    }

    return $this->pageFrom;
  }


  public function getPageTo(){
    if(!isset($this->pageTo)){
      $this->getOffset();
    }

    return $this->pageTo;
  }


}