<?php

namespace App\Http\Controllers\Web;

use App\Http\Controllers\Controller;
use App\Services\SettingService;
use Illuminate\Http\Request;

class SettingController extends Controller
{
    protected SettingService $settingService;

    public function __construct(SettingService $settingService)
    {
        $this->settingService = $settingService;
    }

    public function index()
    {
        $settings = $this->settingService->getAll();
        return view('settings.index', compact('settings'));
    }

    public function update(Request $request)
    {
        $data = $request->except('_token');
        
        // Handle auto cleanup checkbox explicitly since unchecked boxes are missing from request payload
        $data['enable_auto_cleanup'] = $request->has('enable_auto_cleanup') ? '1' : '0';
        
        foreach ($data as $key => $value) {
            $type = is_numeric($value) ? 'integer' : 'string';
            $this->settingService->set($key, $value, $type);
        }

        return back()->with('success', 'Settings updated successfully.');
    }

    /**
    /**
     * Start the Zalo user-bot process in the background.
     */
    public function startBot()
    {
        $cwd = base_path('zalo-userbot');
        $pidFile = $cwd . '/bot.pid';

        // 1. Force kill any existing zombie userbot processes first to prevent session locks
        $this->killAllUserbotProcesses();

        // 2. Clean old files
        @unlink($pidFile);
        @unlink(public_path('zalo/qr.png'));

        $appUrl = url('/');

        if (strncasecmp(PHP_OS, 'WIN', 3) === 0) {
            $cmd = "set APP_URL=" . escapeshellarg($appUrl) . " && cd /d " . escapeshellarg($cwd) . " && start /B node userbot.js > bot.log 2>&1";
            pclose(popen($cmd, "r"));
        } else {
            $cmd = "export APP_URL=" . escapeshellarg($appUrl) . " && cd " . escapeshellarg($cwd) . " && node userbot.js > bot.log 2>&1 &";
            exec($cmd);
        }

        // Wait a brief moment to let it start and write pid
        usleep(500000); 

        return back()->with('success', 'Đã gửi lệnh khởi động Bot Zalo. Vui lòng tải lại trang sau vài giây.');
    }

    /**
     * Check current Bot status via AJAX polling.
     */
    public function checkBotStatus()
    {
        return response()->json([
            'status' => $this->settingService->get('zalo_bot_status') ?? 'disconnected',
            'user' => $this->settingService->get('zalo_bot_user') ?? '',
        ]);
    }

    /**
     * Stop the Zalo user-bot process.
     */
    public function stopBot()
    {
        $pidFile = base_path('zalo-userbot/bot.pid');
        
        // Force kill all active/zombie userbot processes
        $this->killAllUserbotProcesses();

        @unlink($pidFile);
        @unlink(public_path('zalo/qr.png'));
        
        $this->settingService->set('zalo_bot_status', 'disconnected');
        $this->settingService->set('zalo_bot_user', '');

        return back()->with('success', 'Đã tắt Bot Zalo thành công.');
    }

    /**
     * Kill all running userbot instances globally on the system (Windows/Linux compatible).
     */
    private function killAllUserbotProcesses(): void
    {
        if (strncasecmp(PHP_OS, 'WIN', 3) === 0) {
            // Terminate any node.exe process running userbot.js using wmic on Windows
            exec('wmic process where "name=\'node.exe\' and CommandLine like \'%userbot.js%\'" call terminate >nul 2>&1');
        } else {
            // Terminate on Linux/Unix using pkill -f
            exec('pkill -9 -f "node userbot.js" >/dev/null 2>&1');
        }
    }
}