<?php
namespace App\Helpers;

use App\Models\Accessory;
use App\Models\Component;
use App\Models\Consumable;
use App\Models\CustomField;
use App\Models\CustomFieldset;
use App\Models\Depreciation;
use App\Models\Setting;
use App\Models\Statuslabel;
use Crypt;
use Image;
use Illuminate\Contracts\Encryption\DecryptException;

class Helper
{


    /**
     * Simple helper to invoke the markdown parser
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.0]
     * @return String
     */
    public static function parseEscapedMarkedown($str)
    {
        $Parsedown = new \Parsedown();

        if ($str) {
            return $Parsedown->text(e($str));
        }
    }


    /**
     * The importer has formatted number strings since v3,
     * so the value might be a string, or an integer.
     * If it's a number, format it as a string.
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.0]
     * @return String
     */
    public static function formatCurrencyOutput($cost)
    {
        if (is_numeric($cost)) {
            return number_format($cost, 2, '.', '');
        }
        // It's already been parsed.
        return $cost;
    }


    /**
     * Static colors for pie charts.
     * This is inelegant, and could be refactored later.
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.3]
     * @return Array
     */
    public static function chartColors()
    {
        $colors = [
            '#f56954',
            '#00a65a',
            '#f39c12',
            '#00c0ef',
            '#3c8dbc',
            '#d2d6de',
            '#3c8dbc',
            '#3c8dbc',
            '#3c8dbc',

        ];
        return $colors;
    }


    /**
     * Static background (highlight) colors for pie charts
     * This is inelegant, and could be refactored later.
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.2]
     * @return Array
     */
    public static function chartBackgroundColors()
    {
        $colors = [
            '#f56954',
            '#00a65a',
            '#f39c12',
            '#00c0ef',
            '#3c8dbc',
            '#d2d6de',
            '#3c8dbc',
            '#3c8dbc',
            '#3c8dbc',

        ];
        return $colors;
    }


    /**
     * Format currency using comma for thousands until local info is property used.
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.7]
     * @return String
     */
    public static function ParseFloat($floatString)
    {
        $LocaleInfo = localeconv();
        $floatString = str_replace(",", "", $floatString);
        $floatString = str_replace($LocaleInfo["decimal_point"], ".", $floatString);
        // Strip Currency symbol
        // If no currency symbol is set, default to $ because Murica
        $currencySymbol = $LocaleInfo['currency_symbol'];
        if (empty($currencySymbol)) {
            $currencySymbol = '$';
        }

        $floatString = str_replace($currencySymbol, '', $floatString);
        return floatval($floatString);
    }

    /**
     * Get the list of status labels in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.5]
     * @return Array
     */
    public static function statusLabelList()
    {
        $statuslabel_list = array('' => trans('general.select_statuslabel')) + Statuslabel::orderBy('default_label', 'desc')->orderBy('name','asc')->orderBy('deployable','desc')
                ->pluck('name', 'id')->toArray();
        return $statuslabel_list;
    }

    /**
     * Get the list of status label types in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.5]
     * @return Array
     */
    public static function statusTypeList()
    {
        $statuslabel_types =
              array('' => trans('admin/hardware/form.select_statustype'))
            + array('deployable' => trans('admin/hardware/general.deployable'))
            + array('pending' => trans('admin/hardware/general.pending'))
            + array('undeployable' => trans('admin/hardware/general.undeployable'))
            + array('archived' => trans('admin/hardware/general.archived'));
        return $statuslabel_types;
    }

    /**
     * Get the list of depreciations in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.5]
     * @return Array
     */
    public static function depreciationList()
    {
        $depreciation_list = ['' => 'Do Not Depreciate'] + Depreciation::orderBy('name', 'asc')
                ->pluck('name', 'id')->toArray();
        return $depreciation_list;
    }

    /**
     * Get the list of category types in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.5]
     * @return Array
     */
    public static function categoryTypeList()
    {
        $category_types = array(
            '' => '',
            'accessory' => 'Accessory',
            'asset' => 'Asset',
            'consumable' => 'Consumable',
            'component' => 'Component',
            'license' => 'License'
        );
        return $category_types;
    }

    /**
     * Get the list of custom fields in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v2.5]
     * @return Array
     */
    public static function customFieldsetList()
    {
        $customfields = array('' => trans('admin/models/general.no_custom_field')) + CustomFieldset::pluck('name', 'id')->toArray();
        return  $customfields;
    }

    /**
     * Get the list of custom field formats in an array to make a dropdown menu
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.4]
     * @return Array
     */
    public static function predefined_formats()
    {
        $keys = array_keys(CustomField::PREDEFINED_FORMATS);
        $stuff = array_combine($keys, $keys);

        return $stuff;
    }

    /**
     * Get the list of barcode dimensions
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.3]
     * @return Array
     */
    public static function barcodeDimensions($barcode_type = 'QRCODE')
    {
        if ($barcode_type == 'C128') {
            $size['height'] = '-1';
            $size['width'] = '-10';
        } elseif ($barcode_type == 'PDF417') {
            $size['height'] = '-3';
            $size['width'] = '-10';
        } else {
            $size['height'] = '-3';
            $size['width'] = '-3';
        }
        return $size;
    }

    /**
     * Generates a random string
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @return Array
     */
    public static function generateRandomString($length = 10)
    {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $charactersLength = strlen($characters);
        $randomString = '';
        for ($i = 0; $i < $length; $i++) {
            $randomString .= $characters[rand(0, $charactersLength - 1)];
        }
        return $randomString;
    }


    /**
     * This nasty little method gets the low inventory info for the
     * alert dropdown
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @return Array
     */
    public static function checkLowInventory()
    {
        $consumables = Consumable::withCount('consumableAssignments as consumable_assignments_count')->whereNotNull('min_amt')->get();
        $accessories = Accessory::withCount('users as users_count')->whereNotNull('min_amt')->get();
        $components = Component::withCount('assets as assets_count')->whereNotNull('min_amt')->get();

        $avail_consumables = 0;
        $items_array = array();
        $all_count = 0;

        foreach ($consumables as $consumable) {
            $avail = $consumable->numRemaining();
            if ($avail < ($consumable->min_amt) + \App\Models\Setting::getSettings()->alert_threshold) {
                if ($consumable->qty > 0) {
                    $percent = number_format((($avail / $consumable->qty) * 100), 0);
                } else {
                    $percent = 100;
                }

                $items_array[$all_count]['id'] = $consumable->id;
                $items_array[$all_count]['name'] = $consumable->name;
                $items_array[$all_count]['type'] = 'consumables';
                $items_array[$all_count]['percent'] = $percent;
                $items_array[$all_count]['remaining'] = $avail;
                $items_array[$all_count]['min_amt']=$consumable->min_amt;
                $all_count++;
            }


        }

        foreach ($accessories as $accessory) {
            $avail = $accessory->qty - $accessory->users_count;
            if ($avail < ($accessory->min_amt) + \App\Models\Setting::getSettings()->alert_threshold) {

                if ($accessory->qty > 0) {
                    $percent = number_format((($avail / $accessory->qty) * 100), 0);
                } else {
                    $percent = 100;
                }

                $items_array[$all_count]['id'] = $accessory->id;
                $items_array[$all_count]['name'] = $accessory->name;
                $items_array[$all_count]['type'] = 'accessories';
                $items_array[$all_count]['percent'] = $percent;
                $items_array[$all_count]['remaining'] = $avail;
                $items_array[$all_count]['min_amt']=$accessory->min_amt;
                $all_count++;
            }

        }

        foreach ($components as $component) {
            $avail = $component->qty - $component->assets_count;
            if ($avail < ($component->min_amt) + \App\Models\Setting::getSettings()->alert_threshold) {
                if ($component->qty > 0) {
                    $percent = number_format((($avail / $component->qty) * 100), 0);
                } else {
                    $percent = 100;
                }

                $items_array[$all_count]['id'] = $component->id;
                $items_array[$all_count]['name'] = $component->name;
                $items_array[$all_count]['type'] = 'components';
                $items_array[$all_count]['percent'] = $percent;
                $items_array[$all_count]['remaining'] = $avail;
                $items_array[$all_count]['min_amt']=$component->min_amt;
                $all_count++;
            }

        }


        return $items_array;


    }


    /**
     * Check if the file is an image, so we can show a preview
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @param File $file
     * @return String | Boolean
     */
    public static function checkUploadIsImage($file)
    {
        $finfo = @finfo_open(FILEINFO_MIME_TYPE); // return mime type ala mimetype extension
        $filetype = @finfo_file($finfo, $file);
        finfo_close($finfo);

        if (($filetype=="image/jpeg") || ($filetype=="image/jpg")   || ($filetype=="image/png") || ($filetype=="image/bmp") || ($filetype=="image/gif")) {
            return $filetype;
        }

        return false;
    }

    /**
     * Walks through the permissions in the permissions config file and determines if
     * permissions are granted based on a $selected_arr array.
     *
     * The $permissions array is a multidimensional array broke down by section.
     * (Licenses, Assets, etc)
     *
     * The $selected_arr should be a flattened array that contains just the
     * corresponding permission name and a true or false boolean to determine
     * if that group/user has been granted that permission.
     *
     * @author [A. Gianotto] [<snipe@snipe.net]
     * @param array $permissions
     * @param array $selected_arr
     * @since [v1.0]
     * @return Array
     */
    public static function selectedPermissionsArray($permissions, $selected_arr = array())
    {


        $permissions_arr = array();

        foreach ($permissions as $permission) {

            for ($x = 0; $x < count($permission); $x++) {
                $permission_name = $permission[$x]['permission'];

                if ($permission[$x]['display'] === true) {

                    if ($selected_arr) {
                        if (array_key_exists($permission_name, $selected_arr)) {
                            $permissions_arr[$permission_name] = $selected_arr[$permission_name];
                        } else {
                            $permissions_arr[$permission_name] = '0';
                        }
                    } else {
                        $permissions_arr[$permission_name] = '0';
                    }
                }


            }


        }

        return $permissions_arr;
    }

    /**
     * Introspects into the model validation to see if the field passed is required.
     * This is used by the blades to add a required class onto the HTML element.
     * This isn't critical, but is helpful to keep form fields in sync with the actual
     * model level validation.
     *
     * This does not currently handle form request validation requiredness :(
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @return boolean
     */
    public static function checkIfRequired($class, $field)
    {
        $rules = $class::rules();
        foreach ($rules as $rule_name => $rule) {
            if ($rule_name == $field) {
                if (strpos($rule, 'required') === false) {
                    return false;
                } else {
                    return true;
                }

            }
        }
    }


    /**
     * Check to see if the given key exists in the array, and trim excess white space before returning it
     *
     * @author Daniel Melzter
     * @since 3.0
     * @param $array array
     * @param $key string
     * @param $default string
     * @return string
     */
    public static function array_smart_fetch(array $array, $key, $default = '')
    {
        array_change_key_case($array, CASE_LOWER);
        return array_key_exists(strtolower($key), array_change_key_case($array)) ? e(trim($array[ $key ])) : $default;
    }


    /**
     * Gracefully handle decrypting the legacy data (encrypted via mcrypt) and use the new
     * decryption method instead.
     *
     * This is not currently used, but will be.
     *
     * @author A. Gianotto
     * @since 3.6
     * @param CustomField $field
     * @param String $string
     * @return string
     */
    public static function gracefulDecrypt(CustomField $field, $string)
    {

        if ($field->isFieldDecryptable($string)) {

            try {
                Crypt::decrypt($string);
                return Crypt::decrypt($string);

            } catch (DecryptException $e) {
                return 'Error Decrypting: '.$e->getMessage();
            }

        }
        return $string;

    }


    public static function formatStandardApiResponse($status, $payload = null, $messages = null) {

        $array['status'] = $status;
        $array['messages'] = $messages;
        if (($messages) &&  (is_array($messages)) && (count($messages) > 0)) {
            $array['messages'] = $messages;
        }
        ($payload) ? $array['payload'] = $payload : $array['payload'] = null;
        return $array;
    }


    /*
    Possible solution for unicode fieldnames
    */
    public static function make_slug($string) {
        return preg_replace('/\s+/u', '_', trim($string));
    }


    public static function getFormattedDateObject($date, $type = 'datetime', $array = true) {

        if ($date=='') {
            return null;
        }

        $settings = Setting::getSettings();
        $tmp_date = new \Carbon($date);

        if ($type == 'datetime') {
            $dt['datetime'] = $tmp_date->format('Y-m-d H:i:s');
            $dt['formatted'] = $tmp_date->format($settings->date_display_format .' '. $settings->time_display_format);
        } else {
            $dt['date'] = $tmp_date->format('Y-m-d');
            $dt['formatted'] = $tmp_date->format($settings->date_display_format);
        }

        if ($array == 'true') {
            return $dt;
        }
        return $dt['formatted'];

    }


    // Nicked from Drupal :)
    // Returns a file size limit in bytes based on the PHP upload_max_filesize
    // and post_max_size
    public static function file_upload_max_size() {
        static $max_size = -1;

        if ($max_size < 0) {

            // Start with post_max_size.
            $post_max_size = Helper::parse_size(ini_get('post_max_size'));
            if ($post_max_size > 0) {
                $max_size = $post_max_size;
            }

            // If upload_max_size is less, then reduce. Except if upload_max_size is
            // zero, which indicates no limit.
            $upload_max = Helper::parse_size(ini_get('upload_max_filesize'));
            if ($upload_max > 0 && $upload_max < $max_size) {
                $max_size = $upload_max;
            }
        }

        return $max_size;
    }

    public static function file_upload_max_size_readable() {
        static $max_size = -1;

        if ($max_size < 0) {
            // Start with post_max_size.
            $post_max_size = Helper::parse_size(ini_get('post_max_size'));
            if ($post_max_size > 0) {
                $max_size = ini_get('post_max_size');
            }

            // If upload_max_size is less, then reduce. Except if upload_max_size is
            // zero, which indicates no limit.
            $upload_max = Helper::parse_size(ini_get('upload_max_filesize'));
            if ($upload_max > 0 && $upload_max < $max_size) {
                $max_size = ini_get('upload_max_filesize');
            }
        }
        return $max_size;
    }

    public static function parse_size($size) {
        $unit = preg_replace('/[^bkmgtpezy]/i', '', $size); // Remove the non-unit characters from the size.
        $size = preg_replace('/[^0-9\.]/', '', $size); // Remove the non-numeric characters from the size.
        if ($unit) {
            // Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
            return round($size * pow(1024, stripos('bkmgtpezy', $unit[0])));
        }
        else {
            return round($size);
        }
    }


    public static function filetype_icon($filename) {

        $extension = substr(strrchr($filename,'.'),1);

        if ($extension) {
            switch ($extension) {
                case 'jpg':
                case 'jpeg':
                case 'gif':
                case 'png':
                    return "fa fa-file-image-o";
                    break;
                case 'doc':
                case 'docx':
                    return "fa fa-file-word-o";
                    break;
                case 'xls':
                case 'xlsx':
                    return "fa fa-file-excel-o";
                    break;
                case 'zip':
                case 'rar':
                    return "fa fa-file-archive-o";
                    break;
                case 'pdf':
                    return "fa fa-file-pdf-o";
                    break;
                case 'txt':
                    return "fa fa-file-text-o";
                    break;
                case 'lic':
                    return "fa fa-floppy-o";
                    break;
                default:
                    return "fa fa-file-o";
            }
        }
        return "fa fa-file-o";
    }

    public static function show_file_inline($filename) {

        $extension = substr(strrchr($filename,'.'),1);

        if ($extension) {
            switch ($extension) {
                case 'jpg':
                case 'jpeg':
                case 'gif':
                case 'png':
                    return true;
                    break;
                default:
                    return false;
            }
        }
        return false;
    }

    /**
     * Generate a random encrypted password.
     *
     * @author Wes Hulette <jwhulette@gmail.com>
     *
     * @since 5.0.0
     *
     * @return string
     */
    public static function generateEncyrptedPassword(): string
    {
        return bcrypt(Helper::generateUnencryptedPassword());
    }

    /**
     * Get a random unencrypted password.
     *
     * @author Steffen Buehl <sb@sbuehl.com>
     *
     * @since 5.0.0
     *
     * @return string
     */
    public static function generateUnencryptedPassword(): string
    {
        $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

        $password = '';
        for ( $i = 0; $i < 20; $i++ ) {
            $password .= substr( $chars, random_int( 0, strlen( $chars ) - 1 ), 1 );
        }
        return $password;
    }

    /**
     * Process base64 encoded image data and save it on supplied path
     *
     * @param string $image_data base64 encoded image data with mime type
     * @param string $save_path path to a folder where the image should be saved
     * @return string path to uploaded image or false if something went wrong
     */
    public static function processUploadedImage(String $image_data, String $save_path) {
        if ($image_data != null && $save_path != null) {
            // After modification, the image is prefixed by mime info like the following:
            // data:image/jpeg;base64,; This causes the image library to be unhappy, so we need to remove it.
            $header = explode(';', $image_data, 2)[0];
            // Grab the image type from the header while we're at it.
            $extension = substr($header, strpos($header, '/')+1);
            // Start reading the image after the first comma, postceding the base64.
            $image = substr($image_data, strpos($image_data, ',')+1);

            $file_name = str_random(25).".".$extension;

            $directory= public_path($save_path);
            // Check if the uploads directory exists.  If not, try to create it.
            if (!file_exists($directory)) {
                mkdir($directory, 0755, true);
            }

            $path = public_path($save_path.$file_name);

            try {
                Image::make($image)->resize(500, 500, function ($constraint) {
                    $constraint->aspectRatio();
                    $constraint->upsize();
                })->save($path);
            } catch (\Exception $e) {
                return false;
            }

            return $file_name;
        }

        return false;
    }

}