<?php

use LaravelCaptcha\BotDetectCaptcha;
use LaravelCaptcha\BotDetectSimpleCaptcha;
use LaravelCaptcha\Support\LaravelInformation;

if (! function_exists('find_captcha_id_in_form_data')) {
    /**
     * Find CaptchaId in form data.
     *
     * @param array  $formData
     * @return string
     */
    function find_captcha_id_in_form_data(array $formData)
    {
        $captchaId = '';

        if (array_key_exists('BDC_UserSpecifiedCaptchaId', $formData)) {
            $captchaId = $formData['BDC_UserSpecifiedCaptchaId'];
        }

        return $captchaId;
    }
}

if (! function_exists('find_captcha_stylename_in_form_data')) {
    /**
     * Find captcha style name in form data.
     *
     * @param array  $formData
     * @return string
     */
    function find_captcha_stylename_in_form_data(array $formData)
    {
        $captchaStyleName = '';
        
        $formFields = array_keys($formData);
        if (!empty($formFields)) {
            foreach($formFields as $field) {
                if (starts_with($field, 'BDC_VCID_')) {
                    $captchaStyleName = substr($field, strlen('BDC_VCID_'));
                    break;
                }
            }
        }

        return $captchaStyleName;
    }
}

if (! function_exists('captcha_library_is_loaded')) {
    /**
     * Check Captcha library is loaded or not.
     *
     * @return bool
     */
    function captcha_library_is_loaded()
    {
        return class_exists('BDC_CaptchaBase');
    }
}

if (! function_exists('captcha_instance')) {
    /**
     * Get Captcha object instance.
     *
     * @param string  $captchaId
     * @return object
     */
    function captcha_instance($captchaId)
    {
        $captcha = BotDetectCaptcha::getInstance();
        return (null !== $captcha) ? $captcha : new BotDetectCaptcha($captchaId);
    }
}

if (! function_exists('simple_captcha_instance')) {
    /**
     * Get SimpleCaptcha object instance.
     *
     * @param string  $captchaId
     * @return object
     */
    function simple_captcha_instance($captchaStyleName)
    {
        $captcha = BotDetectSimpleCaptcha::getInstance();
        return (null !== $captcha) ? $captcha : new BotDetectSimpleCaptcha($captchaStyleName);
    }
}

if (! function_exists('captcha_image_html')) {
    /**
     * Generate Captcha image html.
     *
     * @param string $captchaId
     * @return string
     * @throws \InvalidArgumentException
     */
    function captcha_image_html($captchaId = '')
    {
        if (empty($captchaId)) {
            $errorMessages  = 'The "captcha_image_html" helper function requires you to pass the configuration option key defined in config/captcha.php file. ';
            $errorMessages .= 'For example: captcha_image_html(\'LoginCaptcha\')';
            throw new InvalidArgumentException($errorMessages);
        }

        $captcha = captcha_instance($captchaId);
        return $captcha->Html();
    }
}

if (! function_exists('simple_captcha_image_html')) {
    /**
     * Generate Captcha image html.
     *
     * @param string $captchaStyleName
     * @return string
     */
    function simple_captcha_image_html($captchaStyleName = '')
    {
        $captcha = simple_captcha_instance($captchaStyleName);
        return $captcha->Html();
    }
}

if (! function_exists('captcha_validate')) {
    /**
     * Validate user's captcha code.
     *
     * @param string  $userInput
     * @param string  $instanceId
     * @return bool
     */
    function captcha_validate($userInput = null, $instanceId = null)
    {
        $captchaId = find_captcha_id_in_form_data(\Request::all());
        $captcha = captcha_instance($captchaId);
        return $captcha->Validate($userInput, $instanceId);
    }
}

if (! function_exists('simple_captcha_validate')) {
    /**
     * Validate user's captcha code.
     *
     * @param string  $userInput
     * @param string  $captchaId
     * @return bool
     */
    function simple_captcha_validate($userInput = null, $captchaId = null)
    {
        $captchaStyleName = find_captcha_stylename_in_form_data(\Request::all());
        $captcha = simple_captcha_instance($captchaStyleName);
        return $captcha->Validate($userInput, $captchaId);
    }
}

if (! function_exists('captcha_is_solved')) {
    /**
     * Check Captcha is solved or not.
     *
     * @param string  $captchaId
     * @return bool
     */
    function captcha_is_solved($captchaId = '')
    {
        if (empty($captchaId)) {
            $errorMessages  = 'The "captcha_is_solved" helper function requires you to pass the configuration option key defined in config/captcha.php file. '; 
            $errorMessages .= 'For example: captcha_is_solved(\'LoginCaptcha\');';
            throw new InvalidArgumentException($errorMessages);
        }

        $captcha = captcha_instance($captchaId);
        return $captcha->IsSolved;
    }
}

if (! function_exists('captcha_reset')) {
    /**
     * Reset captcha for current instance.
     *
     * @param string  $captchaId
     * @return void
     */
    function captcha_reset($captchaId = '')
    {
        if (empty($captchaId) && \Request::isMethod('get')) {
            $errorMessages  = 'The "captcha_reset" helper function requires you to pass the configuration option key defined in config/captcha.php file on HTTP GET request. '; 
            $errorMessages .= 'For example: captcha_reset(\'LoginCaptcha\');';
            throw new InvalidArgumentException($errorMessages);
        }

        if (empty($captchaId) && \Request::isMethod('post')) {
            $captchaId = find_captcha_id_in_form_data(\Request::all());
        }

        $captcha = captcha_instance($captchaId);

        return $captcha->Reset();
    }
}

if (! function_exists('captcha_layout_stylesheet_url')) {
    /**
     * Generate Captcha layout stylesheet url.
     *
     * @return string
     */
    function captcha_layout_stylesheet_url()
    {
        return LaravelInformation::getBaseUrl() . '/captcha-handler?get=bdc-layout-stylesheet.css';
    }
}