<?php

namespace ORM;

class BelongsToManyExtended {

    private $localObject;
    private $foreignObject;
    private $pivotTable;
    private $localInPivot;
    private $remoteInPivot;
    private $remoteFilter;
    private $remoteLimit;
    private $softDelete;

    function __construct($localObject, $foreignObject, $pivotTable, $localInPivot, $remoteInPivot, $remoteFilter = Array(), $remoteLimit = Array(), $softDelete) {
        $this->localObject = $localObject;
        $this->foreignObject = $foreignObject;
        $this->pivotTable = $pivotTable;
        $this->localInPivot = $localInPivot;
        $this->remoteInPivot = $remoteInPivot;
        $this->remoteFilter = $remoteFilter;
        $this->remoteLimit = $remoteLimit;
        $this->softDelete = $softDelete;
    }

    function get() : Collection {

        $limitsSql = '';

        foreach ($this->remoteLimit as $key => $value) {
            $limitsSql .= "$key $value ";
        }

        $pivotTable = '{' . $this->pivotTable . '}';

        $sql = '';
        if($this->softDelete){
            $sql = "SELECT * FROM $pivotTable WHERE $this->localInPivot = ? AND deleted_at IS NULL $limitsSql";
        } else {
            $sql = "SELECT * FROM $pivotTable WHERE $this->localInPivot = ? $limitsSql";
        }

        $relations = DBInstance::query($sql, Array($this->localObject->id), $this->localObject::_connectionName);
        $objects = new Collection();

        if (empty($relations)) {
            return new Collection();
        }

        foreach ($relations as $relation) {
            $relation->childElement = $this->foreignObject::findOne(array_merge(Array("id" => Array("=", $relation->{$this->remoteInPivot})), $this->remoteFilter));
            $objects[] = $relation;
        }

        if (empty($objects)) {
            return new Collection();
        }

        return $objects;
    }

}