<?php
namespace JVBase\registrar\config;

use JVBase\registrar\Registrar;

if (!defined('ABSPATH')) {
	exit;
}

final class Section extends Config{
	protected string $title;
	protected string $slug;
	protected string $description = '';
	protected string $icon = '';
	protected array $fields = [];

	public function __construct(string $title) {
		$this->title = $title;
		$this->slug = sanitize_title($title);
	}

	public function setTitle(string $title): self {
		$this->title = $title;
		return $this;
	}
	public function getTitle():string
	{
		return $this->title;
	}

	public function setDescription(string $description):self
	{
		$this->description = $description;
		return $this;
	}
	public function getDescription():string|array
	{
		return $this->description;
	}

	public function setIcon(string $icon):self
	{
		$this->icon = $icon;
		return $this;
	}

	protected function checkFields(string|array $fields):string|array
	{
		$allFields =  Registrar::getInstance($this->slug)->getFields();
		if (is_array($fields)){
			foreach ($fields as $index =>$fieldName){
				if (!array_key_exists($fieldName, $allFields)){
					error_log('Attempted to add '.$fieldName.' to section. No field defined.');
					unset($fields[$index]);
				}
			}
		} else {
			if (!array_key_exists($fields, $allFields)){
				error_log('Attempted to add '.$fields.' to section. No field defined.');
				return '';
			}
		}
		return $fields;
	}


	public function setFields(array $fields):self
	{
		$fields = $this->checkFields($fields);
		$this->fields = $fields;
		return $this;
	}
	public function addField(string $field):self
	{
		$field = $this->checkFields($field);
		if ($field !== ''){
			$this->fields[] = $field;
		}
		return $this;
	}

	public function getFields():array
	{
		return $this->fields;
	}

	/**
	 * If the user has defined a 'section' key for this section for specific fields, they can autogenerate the section with this
	 * @return $this
	 */
	public function generateFields():self
	{
		$this->fields = array_keys(array_filter(Registrar::getInstance($this->slug)->getFields(), function($field){
			return array_key_exists('section', $field) && $field['section'] === $this->slug;
		}));
		return $this;

	}

	public function getConfig(): array
	{
		return [
			'slug'			=> $this->slug,
			'title'			=> $this->title,
			'description'	=> $this->description,
			'icon'			=> $this->icon,
			'fields'		=> $this->fields,
		];
	}
}