<?php

namespace App\Controller;

use App\Http\HttpCodes;
use App\Http\HttpRequest;
use App\Http\HttpResponse;
use App\Http\JsonHttpResponse;
use App\Validation\ValidationFail;

class Control {

    /**
     * Runs given callback, if the request's json validates the given schema.
     * @param array $schema an array of `fieldName => Validators` which represents the request object schema
     * @param callable $run the callback to run if the request is valid according to the given schema.
     *                      THe callback must accept an HttpRequest, and return an HttpResponse object.
     * @return HttpResponse
     */
    public static function runChecked(array $schema, callable $run): HttpResponse {
        $request_body = file_get_contents('php://input');
        $payload_obj = json_decode($request_body);
        if (!$payload_obj instanceof \stdClass) {
            return new JsonHttpResponse([new ValidationFail("bad-payload", "request body is not a valid json object"), HttpCodes::BAD_REQUEST]);
        }
        $payload = get_object_vars($payload_obj);
        return self::runCheckedFrom($payload, $schema, $run);
    }

    /**
     * Runs given callback, if the given request data array validates the given schema.
     * @param array $data the request's data array.
     * @param array $schema an array of `fieldName => Validators` which represents the request object schema
     * @param callable $run the callback to run if the request is valid according to the given schema.
     *                      THe callback must accept an HttpRequest, and return an HttpResponse object.
     * @return HttpResponse
     */
    public static function runCheckedFrom(array $data, array $schema, callable $run): HttpResponse {
        $fails = [];
        $request = HttpRequest::from($data, $fails, $schema);

        if (!empty($fails)) {
            return new JsonHttpResponse($fails, HttpCodes::BAD_REQUEST);
        }

        return call_user_func_array($run, [$request]);
    }


}