<?php

declare(strict_types=1);

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\TelegramUser;
use App\Services\TelegramService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\View;

/**
 * Controller for managing Telegram bot integration.
 * Each user can configure their own Telegram bot for receiving insights.
 */
class TelegramController extends Controller
{
    /**
     * Display the Telegram configuration page.
     */
    public function index(): View
    {
        /** @var \App\Models\User $user */
        $user = Auth::user();

        /** @var TelegramUser|null $telegramUser */
        $telegramUser = $user->telegramUsers()->first();

        return view('admin.telegram.index', compact('telegramUser'));
    }

    /**
     * Connect/configure the user's Telegram bot.
     */
    public function connect(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'bot_token' => ['required', 'string', 'max:255'],
            'bot_username' => ['nullable', 'string', 'max:255'],
            'chat_id' => ['required', 'string', 'max:255'],
            'telegram_username' => ['nullable', 'string', 'max:255'],
        ]);

        /** @var \App\Models\User $user */
        $user = Auth::user();

        // Test the bot connection before saving
        $telegramService = new TelegramService($validated['bot_token']);
        $testResult = $telegramService->sendMessage(
            $validated['chat_id'],
            '🤖 *Annunk Bot Connected!*' . "\n\n"
                . '✅ Your Telegram bot has been successfully connected to Annunk.'
                . "\n\n" . 'You will now receive learning insights here.'
        );

        if (!$testResult) {
            return back()->with('error', __(
                'Failed to connect. Please check your Bot Token and Chat ID. '
                . 'Make sure you have started a conversation with your bot first.'
            ))->withInput();
        }

        TelegramUser::updateOrCreate(
            ['user_id' => $user->id],
            [
                'telegram_user_id' => $validated['chat_id'],
                'bot_token' => $validated['bot_token'],
                'bot_username' => $validated['bot_username'] ?? null,
                'chat_id' => $validated['chat_id'],
                'telegram_username' => $validated['telegram_username'] ?? null,
                'is_active' => true,
            ]
        );

        return back()->with('success', __('Telegram bot connected successfully! A test message was sent.'));
    }

    /**
     * Send a test message to verify the bot is working.
     */
    public function test(): RedirectResponse
    {
        /** @var \App\Models\User $user */
        $user = Auth::user();

        /** @var TelegramUser|null $telegramUser */
        $telegramUser = $user->telegramUsers()->first();

        if (!$telegramUser || !$telegramUser->isFullyConfigured()) {
            return back()->with('error', __('Please configure your Telegram bot first.'));
        }

        $telegramService = new TelegramService($telegramUser->bot_token);
        $result = $telegramService->sendMessage(
            $telegramUser->chat_id,
            '🧪 *Annunk Test Message*' . "\n\n"
                . '✅ Your bot is working correctly!'
                . "\n\n" . 'You will receive learning insights according to your schedule.'
        );

        if ($result) {
            return back()->with('success', __('Test message sent successfully! Check your Telegram.'));
        }

        return back()->with('error', __('Failed to send test message. Please check your bot configuration.'));
    }

    /**
     * Disconnect the user's Telegram bot.
     */
    public function disconnect(): RedirectResponse
    {
        /** @var \App\Models\User $user */
        $user = Auth::user();

        $user->telegramUsers()->delete();

        return back()->with('success', __('Telegram bot disconnected successfully.'));
    }
}