<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class TelegramController extends Controller
{
    protected string $token;
    protected string $baseUrl;

    public function __construct()
    {
        $this->token = env('TELEGRAM_BOT_TOKEN');
        $this->baseUrl = "https://api.telegram.org/bot{$this->token}";
    }

    /*
    |--------------------------------------------------------------------------
    | WEBHOOK (Telegram -> Laravel)
    |--------------------------------------------------------------------------
    */

    public function webhook(Request $request)
    {
        $update = $request->all();

        Log::info('Telegram Update', $update);

        if (isset($update['message'])) {
            return $this->handleMessage($update['message']);
        }

        if (isset($update['callback_query'])) {
            return $this->handleCallback($update['callback_query']);
        }

        return response()->json(['success' => true]);
    }

    protected function handleMessage(array $message)
    {
        $chatId = $message['chat']['id'];
        $text = trim($message['text'] ?? '');

        return $this->sendMessage($chatId, "Recibido: {$text}");
    }

    protected function handleCallback(array $callback)
    {
        $chatId = $callback['message']['chat']['id'];
        $data = $callback['data'];

        $this->answerCallbackQuery($callback['id'], 'OK');

        return $this->sendMessage($chatId, "Botón: {$data}");
    }

    /*
    |--------------------------------------------------------------------------
    | CORE REQUEST
    |--------------------------------------------------------------------------
    */

    protected function request(string $method, array $payload = [])
    {
        return Http::timeout(60)
            ->post("{$this->baseUrl}/{$method}", $payload)
            ->json();
    }

    /*
    |--------------------------------------------------------------------------
    | MENSAJES BASE (TELEGRAM API)
    |--------------------------------------------------------------------------
    */

    public function sendMessage($chatId, $message, array $extra = [])
    {
        return $this->request('sendMessage', array_merge([
            'chat_id' => $chatId,
            'text' => $message,
            'parse_mode' => 'HTML'
        ], $extra));
    }

    public function sendPhotoFile($chatId, $path, $caption = '')
    {
        // 🔥 CASO 1: URL (internet)
        if (filter_var($path, FILTER_VALIDATE_URL)) {

            return $this->request('sendPhoto', [
                'chat_id' => $chatId,
                'photo' => $path,
                'caption' => $caption
            ]);
        }

        // 🔥 CASO 2: archivo local
        if (!file_exists($path)) {
            return response()->json([
                'error' => 'Archivo no existe'
            ], 400);
        }

        return Http::attach(
            'photo',
            fopen($path, 'r'),
            basename($path)
        )->post("{$this->baseUrl}/sendPhoto", [
                    'chat_id' => $chatId,
                    'caption' => $caption
                ])->json();
    }

    public function sendAudioFile($chatId, $path, $caption = '')
    {
        return Http::attach(
            'audio',
            fopen($path, 'r'),
            basename($path)
        )->post("{$this->baseUrl}/sendAudio", [
                    'chat_id' => $chatId,
                    'caption' => $caption
                ])->json();
    }

    public function sendVideoFile($chatId, $path, $caption = '')
    {
        // 🔥 CASO 1: URL (internet)
        if (filter_var($path, FILTER_VALIDATE_URL)) {

            return $this->request('sendVideo', [
                'chat_id' => $chatId,
                'video' => $path,
                'caption' => $caption
            ]);
        }

        // 🔥 CASO 2: archivo local
        if (!file_exists($path)) {
            return response()->json([
                'error' => 'Archivo no existe'
            ], 400);
        }

        return Http::attach(
            'video',
            fopen($path, 'r'),
            basename($path)
        )->post("{$this->baseUrl}/sendVideo", [
                    'chat_id' => $chatId,
                    'caption' => $caption
                ])->json();
    }

    public function sendDocumentFile($chatId, $path, $caption = '')
    {
        return Http::attach(
            'document',
            fopen($path, 'r'),
            basename($path)
        )->post("{$this->baseUrl}/sendDocument", [
                    'chat_id' => $chatId,
                    'caption' => $caption
                ])->json();
    }

    /*
    |--------------------------------------------------------------------------
    | LOGS
    |--------------------------------------------------------------------------
    */

    public function sendLaravelLog(Request $request)
    {
        $file = storage_path('logs/laravel.log');

        return $this->sendDocumentFile(
            $request->chat_id,
            $file,
            'Laravel Log'
        );
    }

    /*
    |--------------------------------------------------------------------------
    | CALLBACKS
    |--------------------------------------------------------------------------
    */

    public function answerCallbackQuery($id, $text = '')
    {
        return $this->request('answerCallbackQuery', [
            'callback_query_id' => $id,
            'text' => $text
        ]);
    }

    /*
    |--------------------------------------------------------------------------
    | BOT INFO
    |--------------------------------------------------------------------------
    */

    public function getMe()
    {
        return $this->request('getMe');
    }

    /*
    |--------------------------------------------------------------------------
    | WRAPPERS (TUS RUTAS API)
    |--------------------------------------------------------------------------
    */

    public function sendText(Request $request)
    {
        return $this->sendMessage($request->chat_id, $request->message);
    }

    public function sendImage(Request $request)
    {
        return $this->sendPhotoFile(
            $request->chat_id,
            $request->path,
            $request->caption ?? ''
        );
    }

    public function sendAudioApi(Request $request)
    {
        return $this->sendAudioFile(
            $request->chat_id,
            $request->path,
            $request->caption ?? ''
        );
    }

    public function sendVideoApi(Request $request)
    {
        return $this->sendVideoFile(
            $request->chat_id,
            $request->path,
            $request->caption ?? ''
        );
    }

    public function sendDocumentApi(Request $request)
    {
        return $this->sendDocumentFile(
            $request->chat_id,
            $request->path,
            $request->caption ?? ''
        );
    }

    public function sendLog(Request $request)
    {
        return $this->sendLaravelLog($request);
    }

    public function notify(Request $request)
    {
        return $this->sendMessage(
            $request->chat_id,
            $request->message
        );
    }

    public function botInfo()
    {
        return $this->getMe();
    }

    public function getChatId(Request $request)
    {
        $updates = $this->request('getUpdates');

        if (!$updates || !isset($updates['result'])) {
            return response()->json([
                'success' => false,
                'message' => 'No hay mensajes'
            ]);
        }

        $chats = [];

        foreach ($updates['result'] as $update) {

            if (isset($update['message'])) {
                $message = $update['message'];

                $chats[] = [
                    'chat_id' => $message['chat']['id'] ?? null,
                    'type' => $message['chat']['type'] ?? null,
                    'username' => $message['chat']['username'] ?? null,
                    'first_name' => $message['chat']['first_name'] ?? null,
                    'text' => $message['text'] ?? null,
                    'date' => $message['date'] ?? null,
                ];
            }
        }

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