<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\Http;
use Illuminate\Http\Client\Response as ClientResponse;
use App\Models\City;

class WeatherstackController extends Controller
{
    
    public static function requestByCity($city) {      
        $access_key = config('app.weatherstack_api_key');
        $units = 'm'; /* m for Metric, s for Scientific, f for Fahrenheit */ 
        $url = 'http://api.weatherstack.com/current';

        return Http::acceptJson()->get($url, [
            'access_key' => $access_key,
            'units' => $units,
            'query' => $city
        ]);
    }

    public function checkResponse($city, ClientResponse $response) {
        if ($response->successful()) {            
            [$isValidResponse, $error] = $this->checkErrorMessage($city, $response);
        }
        elseif ($response->failed()) {
            $isValidResponse = false;
            $error = 'Request failed.';
        }

        return [$isValidResponse, $error];
    }

    public static function checkErrorMessage($city, ClientResponse $response) {   
        $isValidResponse = true;
        $error = '';

        if ($response->json('success') === false) {
            $isValidResponse = false;

            ($response->json('error.type') === 'usage_limit_reached')   ? $error = 'The usage limit of your API key has been reached.'
                                                                        : $error = "No city named '{$city}' could be found.";
        }
        elseif (City::where('location_name', $response->json('location.name'))->exists()) {
            $isValidResponse = false;
            $error = "'{$response->json('location.name')}, {$response->json('location.country')}' has been already added.";
        }

        return [$isValidResponse, $error];
    }

}