<?php

namespace App\Channels;

use App\Enums\Presence;
use App\Models\Delivery;
use App\Models\Event;
use App\Models\User;
use Illuminate\Http\Client\Response;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Http;
use Throwable;

final class TelegramChannel implements ChannelDriver
{
    public function __construct(
        private readonly string $botToken,
        private readonly int $seenTtl,
    ) {}

    public function presence(User $user, array $config): Presence
    {
        // Бот не видит онлайн-статус: present только если недавно жал кнопку или писал.
        return Cache::has($this->seenKey($config['chat_id'])) ? Presence::Present : Presence::Unknown;
    }

    public function deliver(Event $event, User $user, array $config, Delivery $delivery): DeliveryOutcome
    {
        $text = $event->payload['title'];
        if (! empty($event->payload['subtitle'])) {
            $text .= "\n".$event->payload['subtitle'];
        }

        try {
            $response = $this->call('sendMessage', [
                'chat_id' => $config['chat_id'],
                'text' => $text,
                'reply_markup' => ['inline_keyboard' => [[
                    ['text' => 'Помню', 'callback_data' => 'ack:'.$delivery->action_token],
                    ['text' => $event->payload['done_label'] ?? 'Сделано', 'callback_data' => 'done:'.$delivery->action_token],
                ]]],
            ]);
        } catch (Throwable $e) {
            return DeliveryOutcome::failed($e->getMessage());
        }

        if (! $response->successful() || $response->json('ok') !== true) {
            return DeliveryOutcome::failed('Telegram: '.($response->json('description') ?? "HTTP {$response->status()}"));
        }

        return DeliveryOutcome::ok(['message_id' => $response->json('result.message_id')]);
    }

    public function onDone(Event $event, Delivery $delivery): void
    {
        $messageId = $delivery->meta['message_id'] ?? null;
        $chatId = $delivery->channel?->config['chat_id'] ?? null;
        if ($messageId === null || $chatId === null) {
            return;
        }
        try {
            $this->call('editMessageReplyMarkup', ['chat_id' => $chatId, 'message_id' => $messageId, 'reply_markup' => ['inline_keyboard' => []]]);
        } catch (Throwable) {
            // best effort
        }
    }

    public function touch(int|string $chatId): void
    {
        Cache::put($this->seenKey($chatId), true, $this->seenTtl);
    }

    public function sendText(int|string $chatId, string $text): void
    {
        try {
            $this->call('sendMessage', ['chat_id' => $chatId, 'text' => $text]);
        } catch (Throwable) {
            // best effort
        }
    }

    public function answerCallback(string $callbackId, string $text): void
    {
        try {
            $this->call('answerCallbackQuery', ['callback_query_id' => $callbackId, 'text' => $text]);
        } catch (Throwable) {
            // best effort
        }
    }

    private function call(string $method, array $params): Response
    {
        return Http::timeout(5)->asJson()->post("https://api.telegram.org/bot{$this->botToken}/{$method}", $params);
    }

    private function seenKey(int|string $chatId): string
    {
        return "tg:seen:{$chatId}";
    }
}