<?php

namespace App\Services\Notification;

use App\Models\NotificationChannel;
use Illuminate\Http\Client\ConnectionException;
use Illuminate\Http\Client\PendingRequest;
use Illuminate\Http\Client\RequestException;
use Illuminate\Support\Facades\Http;
use Illuminate\Validation\ValidationException;

class WhapiIdService
{
    public function state(NotificationChannel $channel): array
    {
        return $this->get($channel, '/api/getState');
    }

    public function start(NotificationChannel $channel): array
    {
        return $this->get($channel, '/api/serviceStart');
    }

    public function qr(NotificationChannel $channel): array
    {
        return $this->get($channel, '/api/getQR');
    }

    public function send(NotificationChannel $channel, string $phone, string $message): array
    {
        try {
            return $this->client($channel)->asForm()->post('/api/sendMessage', [
                ...$this->auth($channel), 'phone' => $this->normalizePhone($phone),
                'message' => $message, 'forward_type' => 0, 'ephemeral' => 0,
            ])->throw()->json();
        } catch (RequestException|ConnectionException $exception) {
            $this->providerError($exception);
        }
    }

    private function client(NotificationChannel $channel): PendingRequest
    {
        $baseUrl = rtrim((string) data_get($channel->settings, 'base_url'), '/');
        if (! $baseUrl || ! preg_match('#^https?://#i', $baseUrl)) {
            throw ValidationException::withMessages(['base_url' => 'Base URL WHAPI wajib menggunakan HTTP atau HTTPS.']);
        }
        $baseUrl = preg_replace('#/api$#i', '', $baseUrl);

        return Http::baseUrl($baseUrl)->acceptJson()->timeout(30)->retry(2, 500);
    }

    private function get(NotificationChannel $channel, string $path): array
    {
        try {
            return $this->client($channel)->get($path, $this->auth($channel))->throw()->json();
        } catch (RequestException|ConnectionException $exception) {
            $this->providerError($exception);
        }
    }

    private function providerError(RequestException|ConnectionException $exception): never
    {
        $status = $exception instanceof RequestException ? $exception->response->status() : null;
        $providerMessage = $exception instanceof RequestException
            ? data_get($exception->response->json(), 'results.message')
                ?? data_get($exception->response->json(), 'message')
            : null;
        throw ValidationException::withMessages([
            'whapi' => $providerMessage
                ?: ($status ? "WHAPI merespons HTTP {$status}. Periksa Base URL dan endpoint gateway." : 'Server WHAPI tidak dapat dihubungi.'),
        ]);
    }

    private function auth(NotificationChannel $channel): array
    {
        $apiKey = data_get($channel->credentials, 'api_key');
        if (! $apiKey) {
            throw ValidationException::withMessages(['api_key' => 'API Key perangkat WHAPI belum diatur.']);
        }

        return ['apiKey' => $apiKey];
    }

    private function normalizePhone(string $phone): string
    {
        $phone = preg_replace('/\D+/', '', $phone);
        if (str_starts_with($phone, '0')) {
            $phone = '62'.substr($phone, 1);
        }

        return $phone;
    }
}