using System;
using System.Diagnostics;
using System.IO;
using VNCServerList.Models;

namespace VNCServerList.Services
{
    public class VNCService
    {
        private readonly SettingsService _settingsService;
        private readonly DatabaseService _databaseService;

        public VNCService(DatabaseService databaseService, SettingsService settingsService = null)
        {
            _settingsService = settingsService ?? new SettingsService();
            _databaseService = databaseService;
        }

        public bool ConnectToServer(VNCServer server)
        {
            try
            {
                var settings = _settingsService.GetSettings();
                var vncViewerPath = settings.VNCViewerPath;
                
                if (!File.Exists(vncViewerPath))
                {
                    throw new FileNotFoundException($"VNC Viewer를 찾을 수 없습니다: {vncViewerPath}");
                }

                // 서버의 argument가 없으면 설정의 기본 argument 사용
                var arguments = $"-host={server.IP}";
                
                if (!string.IsNullOrEmpty(server.Argument))
                {
                    arguments += $" {server.Argument}";
                }
                else if (!string.IsNullOrEmpty(settings.Argument))
                {
                    arguments += $" {settings.Argument}";
                }

                // 비밀번호가 있으면 추가
                if (!string.IsNullOrEmpty(server.Password))
                {
                    arguments += $" -password={server.Password}";
                }

                System.Diagnostics.Debug.WriteLine($"VNC 실행: 경로='{vncViewerPath}', 인수='{arguments}'");

                // VNC Viewer 실행
                var startInfo = new ProcessStartInfo
                {
                    FileName = vncViewerPath,
                    Arguments = arguments,
                    UseShellExecute = true
                };

                Process.Start(startInfo);

                return true;
            }
            catch (Exception ex)
            {
                throw new Exception($"VNC 연결 중 오류가 발생했습니다: {ex.Message}", ex);
            }
        }

        public bool ConnectToServer(string user, string ip)
        {
            var server = _databaseService.GetServerByUserAndIP(user, ip);
            if (server == null)
            {
                throw new ArgumentException($"서버 {user}@{ip}를 찾을 수 없습니다.");
            }

            return ConnectToServer(server);
        }

        public bool IsVNCViewerInstalled()
        {
            var vncViewerPath = _settingsService.GetSettings().VNCViewerPath;
            System.Diagnostics.Debug.WriteLine($"VNC 설치 확인: 경로='{vncViewerPath}', 존재={File.Exists(vncViewerPath)}");
            return File.Exists(vncViewerPath);
        }

        public string GetVNCViewerPath()
        {
            var path = _settingsService.GetSettings().VNCViewerPath;
            System.Diagnostics.Debug.WriteLine($"VNC 경로 조회: '{path}'");
            return path;
        }

        public void SetVNCViewerPath(string path)
        {
            _settingsService.UpdateVNCViewerPath(path);
        }
    }
}