<?php

namespace FluentForm\App\Modules\Form;

use FluentForm\App\Services\Parser\Form as FormParser;

/**
 * Available methods
 *
 * @method static array      getShortCodeInputs(\stdClass $form, array $with = ['admin_label'])
 * @method static array      getValidations(\stdClass $form, array $inputs, array $fields = [])
 * @method static array      getElement(\stdClass $form, string|array $name, array $with = [])
 * @method static boolean    hasElement(\stdClass $form, string $name)
 * @method static boolean    hasPaymentFields(\stdClass $form)
 * @method static array      getPaymentFields(\stdClass $form, $with = [])
 * @method static array      getPaymentInputFields(\stdClass $form, $with = [])
 * @method static array      getAttachmentInputFields(\stdClass $form, $with = [])
 * @method static boolean    hasRequiredFields(\stdClass $form, array $fields)
 * @method static array      getInputsByElementTypes(\stdClass $form, array $elements, array $with = [])
 * @method static array|null getField(\stdClass $form, string|array $element, string|array $attribute, array $with = [])
 * @method static array      getEssentialInputs(\stdClass $form, array $inputs, array $with)
 */
class FormFieldsParser
{
    protected static $forms = [];

    protected static $formsWith = [];

    public static function maybeResetForm($form, $with)
    {
        if (!is_object($form) && is_numeric($form)) {
            $form = \FluentForm\App\Models\Form::find($form);
        }

        if (isset(static::$formsWith[$form->id]) && array_diff(static::$formsWith[$form->id], $with)) {
            static::$forms[$form->id] = [];
        }
        static::$formsWith[$form->id] = $with;
    }

    public static function getFields($form, $asArray = false)
    {
        return static::parse('fields', $form, $asArray);
    }

    public static function getInputs($form, $with = [])
    {
        static::maybeResetForm($form, $with);
        return static::parse('inputs', $form, $with);
    }

    public static function getEntryInputs($form, $with = ['admin_label', 'raw'])
    {
        static::maybeResetForm($form, $with);
        return static::parse('entry_inputs', $form, $with);
    }

    public static function parse($key, $form, $with)
    {
        if (!is_object($form) && is_numeric($form)) {
            $form = wpFluent()->table('fluentform_forms')->find($form);
        }

        // Return empty array if form is still not found or is null
        if (!$form || !is_object($form)) {
            return [];
        }

        if (!isset(static::$forms[$form->id])) {
            static::$forms[$form->id] = [];
        }

        if (!isset(static::$forms[$form->id][$key])) {
            $parser = new FormParser($form);
            $method = str_replace(' ', '', ucwords(str_replace('_', ' ', $key)));

            static::$forms[$form->id][$key] = $parser->{'get' . $method}($with);
        }

        return static::$forms[$form->id][$key];
    }

    public static function getAdminLabels($form, $fields = [])
    {
        if (!isset(static::$forms[$form->id])) {
            static::$forms[$form->id] = [];
        }

        if (!isset(static::$forms[$form->id]['admin_labels'])) {
            $parser = new FormParser($form);
            static::$forms[$form->id]['admin_labels'] = $parser->getAdminLabels($fields);
        }

        return static::$forms[$form->id]['admin_labels'];
    }

    /**
     * Deligate dynamic static method calls to FormParser method.
     * And set the result to the store before returning to dev.
     *
     * @param string $method
     * @param array  $parameters
     *
     * @return mixed
     */
    public static function __callStatic($method, $parameters)
    {
        // The first item of the parameters is expected to contain the form object.
        $form = array_shift($parameters);

        $forceFreshValue = [
            'getField',
            'getElement',
            'hasElement',
            'getInputsByElementTypes',
        ];

        // If the store doesn't have the requested result we'll
        // deletegate the method call to the Parser method.
        // Set the store before returning it to the dev.
        if (in_array($method, $forceFreshValue) || !isset(static::$forms[$form->id][$method])) {
            $parser = new FormParser($form);

            static::$forms[$form->id][$method] = call_user_func_array([$parser, $method], $parameters);
        }

        return static::$forms[$form->id][$method];
    }

    public static function resetData()
    {
        static::$forms = [];
        static::$formsWith = [];
    }
}