<?php

namespace App\Lib\CafelApi\Models;

use App\Enums\HttpMethods;
use App\Exceptions\CafelApiException;
use App\Lib\CafelApi\Transport\ApiInterface;
use App\Lib\CafelApi\Transport\Request;
use App\Lib\FileHelper;
use App\Lib\ToolboxHelper;
use Illuminate\Support\Facades\Validator;
use Illuminate\Support\Str;

/**
 *
 * @author Jérémy Munsch <jeremy.munsch@ldc.fr>
 */
abstract class CafelClientModel implements \JsonSerializable
{
    /**
     * The Api object that will handle requests and responses
     *
     * @var \App\Lib\CafelApi\Transport\ApiInterface
     */
    protected static $apiInterface;

    /**
     * Validation rules from cafel Api
     *
     * @var array
     */
    protected static $validationRules = [];

    /**
     * Column translations
     *
     * @var array
     */
    protected static $columnsTranslations = [];

    /**
     * Create the Api interface
     *
     * @return void
     */
    protected static function setUpApiInterface()
    {
        self::$apiInterface = self::$apiInterface ?: new ApiInterface();
    }

    /**
     * Generate a Request from the route name
     *
     * @param string $routeName
     * @param array  $query     Params to pass on to the route.
     * @param array  $data      Http body params.
     * @return \App\Lib\CafelApi\Transport\Request
     * @throws \ErrorException If the requested route is unknown.
     * @throws \ErrorException If a required parameter is missing.
     */
    public static function getResquest(string $routeName, array $query = [], array $data = []): Request
    {
        // Convert bool to integer.
        $query = \array_map(function ($v) {
            return is_bool($v) ? (int)$v : $v;
        }, $query);
        $data  = \array_map(function ($v) {
            return is_bool($v) ? (int)$v : $v;
        }, $data);

        $routes = config('cafel.routes');
        if (!isset($routes[$routeName])) {
            throw new \ErrorException("Unknown route $routeName from the crm");
        }
        $route        = $routes[$routeName];
        $matches      = [];
        $matchedIndex = [];
        \preg_match_all('/{([\w-]*)}/', $route['uri'], $matches);
        if (\count($matches[0])) {
            foreach ($matches[0] as $k => $match) {
                if (!isset($query[$matches[1][$k]])) {
                    throw new \ErrorException(sprintf('Missing required parameter %s', $matches[1][$k]));
                }
                $route['uri']                  = str_replace($match, $query[$matches[1][$k]], $route['uri']);
                $matchedIndex[$matches[1][$k]] = $query[$matches[1][$k]];
            }
        }
        foreach ($matchedIndex as $key => $value) {
            unset($query[$key]);
        }
        if (count($query)) {
            $route['uri'] = sprintf('%s?%s', $route['uri'], \http_build_query($query));
        }
        return new Request(HttpMethods::make($route['methods'][0]), $route['uri'], [], $data);
    }

    /**
     * Validate data row from api.
     *
     * @param array $data
     * @return void
     * @throws \Illuminate\Validation\ValidationException If data does not validate.
     */
    public static function validateDataRow(array $data)
    {
        $validationRules = collect(static::$validationRules)
            /** @var string|array $rule */
            ->mapWithKeys(function ($rules, string $attribute) {
                return [
                    $attribute => is_array($rules) ? collect($rules)
                        ->map(function ($rule) {
                            // * Handle new rule instance
                            return \is_array($rule) ? new $rule[0]($rule[1]) : $rule;
                        })->all() : $rules
                ];
            })->all();
        static::validateData($data, $validationRules);
    }

    /**
     * Validate data from api
     *
     * @param array $data
     * @param array $rules
     * @return array
     * @throws \Illuminate\Validation\ValidationException If data does not validate.
     */
    protected function validateData(array $data, array $rules): array
    {
        return Validator::validate($data, $rules);
    }

    /**
     * Get paginated mises en places
     *
     * @param string  $routeName
     * @param integer $page
     * @param integer $pageSize
     * @param mixed   ...$args
     * @return array
     * @throws \App\Exceptions\CafelApiException If reponse status is KO, or body is not an array.
     */
    public static function paginate(string $routeName, int $page, int $pageSize = 100, ...$args): array
    {
        self::setUpApiInterface();
        $request  = CafelClientModel::getResquest(
            $routeName,
            array_merge($args, ['page' => $page, 'pageSize' => $pageSize])
        );
        $response = self::$apiInterface->call($request);

        if (!\is_array($response->body)) {
            throw new CafelApiException('Response should have been an array');
        }

        $out = [];
        foreach ($response->body as $row) {
            $out[] = static::translateColumns($row);
        }

        return $out;
    }

    /**
     * Translate row keys
     *
     * @param array $row
     * @return array
     */
    protected static function translateColumns(array $row): array
    {
        foreach (static::$columnsTranslations as $cafelName => $newName) {
            $row = static::renameArrKey($row, $cafelName, $newName);
        }
        return $row;
    }

    /**
     * Rename array key
     *
     * @param array  $arr
     * @param string $oldKey
     * @param string $newKey
     * @return array
     */
    protected static function renameArrKey(array $arr, string $oldKey, string $newKey): array
    {
        // * Failsafe
        if (!isset($arr[$oldKey])) {
            return $arr;
        }
        $keys = array_keys($arr);

        $keys[array_search($oldKey, $keys)] = $newKey;

        $newArr = array_combine($keys, $arr);
        return $newArr;
    }

    /**
     * Fetch and store picture to a path
     *
     * @param string $folder The folder where to put the picture.
     * @param string $url    The cafel image url.
     * @return string The picture path
     * @throws \App\Exceptions\CafelApiException If Response is not a valid array.
     * @throws \ErrorException If writing to temp file failed.
     * @throws \App\Exceptions\CafelApiImageFetchException If invalid image was given or ext could not be confirmed.
     * @phpcs:ignore Squiz.Commenting.FunctionCommentThrowTag.WrongNumber
     */
    public static function fetchPicture(string $folder, string $url): string
    {
        /** @var array $query */
        parse_str(\parse_url($url, \PHP_URL_QUERY), $query);
        $idPhoto = intval($query['idPhoto']);
        self::setUpApiInterface();
        $request = CafelClientModel::getResquest(
            'cafel.ldc.photoeleveur',
            ['idPhoto' => $idPhoto]
        );

        $response = self::$apiInterface->call($request);

        if (!\is_array($response->body)) {
            throw new CafelApiException('Response should have been an array');
        }

        // * Filter Keys using intersection
        \extract(\array_intersect_key($response->body, ['Ext' => '', 'Name' => '', 'Data' => '']));


        return ToolboxHelper::storeImage(
            $folder,
            FileHelper::fromBase64(
                Str::lower($Name),
                Str::lower($Ext),
                $Data
            ),
            false
        );
    }
}