<?php
/**
 * FormDataProcessor
 * PHP version 7.4
 *
 * @category Class
 * @package  Fortnox
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 */

/**
 * Fortnox API
 *
 * # Documentation   The Fortnox API is organized around REST. This means that we’ve designed it to have resource-oriented URLs and be as predictable as possible for you as developer.  It also means that we use HTTP status codes when something goes wrong and HTTP verbs understod by many API clients around the web.  We use a modified version of OAuth2 for authentication to offer a secure way for both you and our users to interact.  The API is generally built to support both XML and JSON but in this documentation all the examples will be in JSON.  We encourage you to read all the articles in the [Guides & Good to Know section](https://www.fortnox.se/developer/guides-and-good-to-know/)</a> first, before going forward and learning about the different resources.  This to ensure you get an understanding of some of the shared components of the API such as parameters and error handling.  ## Rate limits  The limit per access-token is 25 requests per 5 seconds. This equals to 300 requests per minute.  [Read more about this here.](https://www.fortnox.se/developer/guides-and-good-to-know/rate-limits-for-fortnox-api/)  ## Query parameters  Use query parameters with the ?-character and separate parameters with the &-character.   **Example:**  GET - https://api.fortnox.se/3/invoices?accountnumberfrom=3000&accountnumberto=4000 Read more about our parameters [here](https://www.fortnox.se/developer/guides-and-good-to-know/parameters/)   Search the documentation using the search field in the top left corner.
 *
 * The version of the OpenAPI document: 
 * Generated by: https://openapi-generator.tech
 * Generator version: 7.19.0
 */

/**
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
 * https://openapi-generator.tech
 * Do not edit the class manually.
 */

namespace Fortnox;

use ArrayAccess;
use DateTime;
use GuzzleHttp\Psr7\Utils;
use Psr\Http\Message\StreamInterface;
use SplFileObject;
use Fortnox\Model\ModelInterface;

/**
 * FormDataProcessor Class Doc Comment
 *
 * @category Class
 * @package  Fortnox
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 */
class FormDataProcessor
{
    /**
     * Tags whether payload passed to ::prepare() contains one or more
     * SplFileObject or stream values.
     */
    public bool $has_file = false;

    /**
     * Take value and turn it into an array suitable for inclusion in
     * the http body (form parameter). If it's a string, pass through unchanged
     * If it's a datetime object, format it in ISO8601
     *
     * @param array<string|bool|array|DateTime|ArrayAccess|SplFileObject> $values the value of the form parameter
     *
     * @return array [key => value] of formdata
     */
    public function prepare(array $values): array
    {
        $this->has_file = false;
        $result = [];

        foreach ($values as $k => $v) {
            if ($v === null) {
                continue;
            }

            $result[$k] = $this->makeFormSafe($v);
        }

        return $result;
    }

    /**
     * Flattens a multi-level array of data and generates a single-level array
     * compatible with formdata - a single-level array where the keys use bracket
     * notation to signify nested data.
     *
     * credit: https://github.com/FranBar1966/FlatPHP
     */
    public static function flatten(array $source, string $start = ''): array
    {
        $opt = [
            'prefix'          => '[',
            'suffix'          => ']',
            'suffix-end'      => true,
            'prefix-list'     => '[',
            'suffix-list'     => ']',
            'suffix-list-end' => true,
        ];

        if ($start === '') {
            $currentPrefix    = '';
            $currentSuffix    = '';
            $currentSuffixEnd = false;
        } elseif (array_is_list($source)) {
            $currentPrefix    = $opt['prefix-list'];
            $currentSuffix    = $opt['suffix-list'];
            $currentSuffixEnd = $opt['suffix-list-end'];
        } else {
            $currentPrefix    = $opt['prefix'];
            $currentSuffix    = $opt['suffix'];
            $currentSuffixEnd = $opt['suffix-end'];
        }

        $currentName = $start;
        $result = [];

        foreach ($source as $key => $val) {
            $currentName .= $currentPrefix.$key;

            if (is_array($val) && !empty($val)) {
                $currentName .= $currentSuffix;
                $result += self::flatten($val, $currentName);
            } else {
                if ($currentSuffixEnd) {
                    $currentName .= $currentSuffix;
                }

                if (is_resource($val)) {
                    $result[$currentName] = $val;
                } else {
                    $result[$currentName] = ObjectSerializer::toString($val);
                }
            }

            $currentName = $start;
        }

        return $result;
    }

    /**
     * formdata must be limited to scalars or arrays of scalar values,
     * or a resource for a file upload. Here we iterate through all available
     * data and identify how to handle each scenario
     */
    protected function makeFormSafe($value)
    {
        if ($value instanceof SplFileObject) {
            return $this->processFiles([$value])[0];
        }

        if (is_resource($value)) {
            $this->has_file = true;

            return $value;
        }

        if ($value instanceof ModelInterface) {
            return $this->processModel($value);
        }

        if (is_array($value) || (is_object($value) && !$value instanceof \DateTimeInterface)) {
            $data = [];

            foreach ($value as $k => $v) {
                $data[$k] = $this->makeFormSafe($v);
            }

            return $data;
        }

        return ObjectSerializer::toString($value);
    }

    /**
     * We are able to handle nested ModelInterface. We do not simply call
     * json_decode(json_encode()) because any given model may have binary data
     * or other data that cannot be serialized to a JSON string
     */
    protected function processModel(ModelInterface $model): array
    {
        $result = [];

        foreach ($model::openAPITypes() as $name => $type) {
            $value = $model->offsetGet($name);

            if ($value === null) {
                continue;
            }

            if (strpos($type, '\SplFileObject') !== false) {
                $file = is_array($value) ? $value : [$value];
                $result[$name] = $this->processFiles($file);

                continue;
            }

            if ($value instanceof ModelInterface) {
                $result[$name] = $this->processModel($value);

                continue;
            }

            if (is_array($value) || is_object($value)) {
                $result[$name] = $this->makeFormSafe($value);

                continue;
            }

            $result[$name] = ObjectSerializer::toString($value);
        }

        return $result;
    }

    /**
     * Handle file data
     */
    protected function processFiles(array $files): array
    {
        $this->has_file = true;

        $result = [];

        foreach ($files as $i => $file) {
            if (is_array($file)) {
                $result[$i] = $this->processFiles($file);

                continue;
            }

            if ($file instanceof StreamInterface) {
                $result[$i] = $file;

                continue;
            }

            if ($file instanceof SplFileObject) {
                $result[$i] = $this->tryFopen($file);
            }
        }

        return $result;
    }

    private function tryFopen(SplFileObject $file)
    {
        return Utils::tryFopen($file->getRealPath(), 'rb');
    }
}
