<?php

namespace rednaoeasycalculationforms\Parser\Core;

use rednaoeasycalculationforms\core\Managers\FormManager\FormBuilder;
use rednaoeasycalculationforms\Utilities\Sanitizer;

class DataRetriever
{
    static $GlobalFunctions = [];
    public $VarDictionary = [];
    public $FunctionDictionary = [];
    /** @var FormBuilder */
    public $FormBuilder;
    public $Attributes = [];
    /** @var \Closure */
    public $CustomRetriever;

    public function __construct($formBuilder, $customRetriever = null)
    {
        $this->CustomRetriever = $customRetriever;
        $this->FunctionDictionary = self::$GlobalFunctions;
        $this->FormBuilder = $formBuilder;
    }

    public function GetFieldById($fieldId)
    {
        return $this->FormBuilder->GetFieldById($fieldId);
    }

    public function SetVar($varName, $value)
    {
        $this->VarDictionary[$varName] = $value;
    }

    public function &GetVar($varName)
    {
        if(isset($this->VarDictionary[$varName]))
            return $this->VarDictionary[$varName];
        $null = null;
        return $null;
    }

    public function AddFunction($name, $callBack)
    {
        $this->FunctionDictionary[$name] = $callBack;
    }

    public function CallFunction($name, $args)
    {
        if(isset($this->FunctionDictionary[$name]))
        {
            $callBack = $this->FunctionDictionary[$name];
            return $callBack($this, ...$args);
        }
        return null;
    }

    public function GetAttribute($name)
    {
        if(isset($this->Attributes[$name]))
            return $this->Attributes[$name];
        return '';
    }

    public function AddAttribute($name, $value)
    {
        $this->Attributes[$name] = $value;
    }

    public function GetFixedValue($id, $options)
    {
        if($this->CustomRetriever != null) {
            $value = call_user_func($this->CustomRetriever, $this, $id, $options);
            if($value !== null)
                return $value;
        }

        $subId = Sanitizer::GetStringValueFromPath($options, ['Op', 'Id']);
        return $this->GetAttribute($id . ($subId == '' ? '' : '_' . $subId));
    }

}