<?php

namespace App\Serializer;

use App\Entity\AbstractWebflowEntity;
use Closure;
use Doctrine\Common\Annotations\Reader;
use ReflectionClass;

class ItemSerializer {

    private $class;
    private $map;
    private $reader;
    private $methods;

    public function __construct(Reader $reader, AbstractWebflowEntity $class) {
        $this->reader = $reader;
        $this->class = $class; 
        $this->refClass = new ReflectionClass(get_class($class));

        foreach ($this->refClass->getMethods() as $key => $method)
            $this->methods[strtolower($method->getName())] = $method;


        foreach ($this->refClass->getParentClass() as $class)
            $this->mapProperties(new ReflectionClass($class));

        $this->mapProperties($this->refClass);
    }

    private function mapProperties(ReflectionClass $c): void {
        foreach ($c->getProperties() as $prop) {
            $c = $this->reader->getPropertyAnnotation($prop, ItemSerializedName::class);
            
            if ($c && $c->getFieldName() == '@ignore')
                continue;

            $this->map[$prop->getName()] = $c ? $c->getFieldName() : $prop->getName();
        }
    }

    public function restoreProperties(): array {
        $d = [];

        foreach ($this->map as $field => $origField)
            $d[$origField] = ($fn = $this->getFn($field)) ? $fn() : null;

        return $d;
    }

    public function setFn(string $name): ?array {
        $m = array_filter($this->map, function(string $val) use ($name) {
            return $val == $name;
        });

        if (sizeof($m) == 0)
            return null;

        $fn = sprintf("set%s", strtolower(current(array_flip($m))));

        if (!isset($this->methods[$fn]))
            return null;

        return ([$this->class, $this->methods[$fn]->getName()]);
    }

    public function getFn(string $name): ?array {
        $m = array_filter($this->map, function (string $key) use ($name) {
            return $key == $name;
        }, ARRAY_FILTER_USE_KEY);

        if (sizeof($m) == 0)
            return null;

        $fn = sprintf("get%s", strtolower(current(array_flip($m))));

        if (!isset($this->methods[$fn]))
            return null;

        return [$this->class, $this->methods[$fn]->getName()];
    }
}