<?php

namespace App\Services;

use Illuminate\Http\Client\ConnectionException;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

/**
 * HTTP client for device-control-service's manual-command API (see that
 * service's README for why HTTP instead of gRPC here). Mirrors the
 * gRPC CommandResult contract: {success, error} in the body — always
 * returned as an array here too, never an exception, so callers don't need
 * to distinguish "device rejected it" from "service unreachable" to render
 * a flash message.
 */
class DeviceControlClient
{
    public function __construct(private readonly string $baseUrl) {}

    /** @return array{success: bool, error: ?string} */
    public function turnOn(string $externalId): array
    {
        return $this->post("/devices/{$externalId}/turn-on");
    }

    /** @return array{success: bool, error: ?string} */
    public function turnOff(string $externalId): array
    {
        return $this->post("/devices/{$externalId}/turn-off");
    }

    /** @return array{success: bool, error: ?string} */
    public function setLevel(string $externalId, float $level): array
    {
        return $this->post("/devices/{$externalId}/set-level", ['level' => $level]);
    }

    /**
     * @param  array<string, mixed>  $body
     * @return array{success: bool, error: ?string}
     */
    private function post(string $path, array $body = []): array
    {
        try {
            $response = Http::timeout(5)->post("{$this->baseUrl}{$path}", $body);
        } catch (ConnectionException $e) {
            Log::error('device-control-service unreachable', ['path' => $path, 'error' => $e->getMessage()]);

            return ['success' => false, 'error' => 'device-control-service недоступен'];
        }

        if ($response->failed()) {
            Log::error('device-control-service returned an error status', ['path' => $path, 'status' => $response->status()]);

            return ['success' => false, 'error' => 'device-control-service вернул ошибку'];
        }

        return [
            'success' => (bool) $response->json('success'),
            'error' => $response->json('error'),
        ];
    }
}