<?php

namespace Give\FormAPI;

use Give\FormAPI\Form\Colorpicker;
use Give\FormAPI\Form\File;
use Give\FormAPI\Form\Group;
use Give\FormAPI\Form\Media;
use Give\FormAPI\Form\Radio;
use Give\FormAPI\Form\Select;
use Give\FormAPI\Form\Text;
use Give\FormAPI\Form\Textarea;
use Give\FormAPI\Form\Wysiwyg;
use Give\Framework\Exceptions\Primitives\InvalidArgumentException;

final class Fields
{
    /**
     * Field vs class name mapping array
     *
     * @since 2.7.0
     * @var array
     */
    private $fieldClasses = [
        'text' => Text::class,
        'textarea' => Textarea::class,
        'file' => File::class,
        'media' => Media::class,
        'radio' => Radio::class,
        'wysiwyg' => Wysiwyg::class,
        'colorpicker' => Colorpicker::class,
        'group' => Group::class,
        'select' => Select::class,
    ];

    /**
     * Get field object.
     *
     * @since 2.7.0
     *
     * @param array $array
     *
     * @return Form\Field
     */
    public static function fromArray($array)
    {
        $field = new static();
        $field->validate($array);

        /**
         * Filter the field classes
         *
         * @since 2.7.0
         *
         * @param Form\Field[] $fieldClasses
         */
        $field->fieldClasses = apply_filters('give_form_api_field_classes', $field->fieldClasses);

        /* @var Form\Field $fieldClass */
        $fieldClass = $field->fieldClasses[$field->getFieldType($array['type'])];

        return $fieldClass::fromArray($array);
    }

    /**
     * Get field class name.
     * Note:
     *  1. Field name create with {fieldType_modifier} logic. Use underscore in field type only if you want to add a modifier. For example: text_small, radio_inline etc.
     *  2. This function exist for backward compatibility and can be remove in future
     *
     * @since 2.7.0
     *
     * @param $type
     *
     * @return string
     */
    private function getFieldType($type)
    {
        if (false !== strpos($type, '_')) {
            $type = current(explode('_', $type, 2));
        }

        return $type;
    }

    /**
     * Validate field arguments
     *
     * @since 2.7.0
     *
     * @param array $array
     *
     * @throws InvalidArgumentException
     */
    private function validate($array)
    {
        $required = ['id', 'name', 'type'];
        $array = array_filter($array); // Remove empty values.

        if (array_diff($required, array_keys($array))) {
            throw new InvalidArgumentException(
                __('To create a Field object, please provide valid id, name and type.', 'give')
            );
        }
    }
}
