using System;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;

namespace BetterEN5.Services
{
    public static class TouchFixService
    {
        private static bool _fixApplied = false;

        public static async Task ApplyFixAsync()
        {
            if (_fixApplied) return;

            try
            {
                await Task.Run(() =>
                {
                    ForceIWBMode();
                    PatchTouchConfig();
                    SuppressTouchErrors();

                    _fixApplied = true;
                });
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"[Better-EN5] TouchFix failed: {ex.Message}");
            }
        }

        public static bool IsTouchWorkingCorrectly()
        {
            try
            {
                return TryDetectIWB();
            }
            catch
            {
                return false;
            }
        }

        public static async Task<bool> ForceTouchEnableAsync()
        {
            return await Task.Run(() =>
            {
                try
                {
                    ForceIWBMode();
                    return true;
                }
                catch
                {
                    return false;
                }
            });
        }

        private static bool TryDetectIWB()
        {
            try
            {
                using var key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Seewo\EasiNote5");
                if (key != null)
                {
                    var val = key.GetValue("ForceIWB");
                    if (val != null && val.ToString() == "1")
                        return true;
                }
            }
            catch { }

            try
            {
                var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                var configFile = Path.Combine(localAppData, "Seewo", "EasiNote5", "Config", "IWBConfig.json");
                if (File.Exists(configFile))
                {
                    var json = File.ReadAllText(configFile);
                    if (json.Contains("\"ForceIWB\": true") || json.Contains("\"ForceIWB\":true"))
                        return true;
                }
            }
            catch { }

            return false;
        }

        private static void ForceIWBMode()
        {
            try
            {
                var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                var configDir = Path.Combine(localAppData, "Seewo", "EasiNote5", "Config");
                var configFile = Path.Combine(configDir, "IWBConfig.json");

                if (!Directory.Exists(configDir))
                    Directory.CreateDirectory(configDir);

                var config = new
                {
                    ForceIWB = true,
                    TouchDriverType = "WindowsTouch",
                    SkipTouchCheck = true,
                    EnableMultiTouch = true,
                    LastFixTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")
                };

                var json = System.Text.Json.JsonSerializer.Serialize(config, new System.Text.Json.JsonSerializerOptions
                {
                    WriteIndented = true
                });

                File.WriteAllText(configFile, json);

                Microsoft.Win32.Registry.SetValue(@"HKEY_CURRENT_USER\SOFTWARE\Seewo\EasiNote5", "ForceIWB", 1, Microsoft.Win32.RegistryValueKind.DWord);
                Microsoft.Win32.Registry.SetValue(@"HKEY_CURRENT_USER\SOFTWARE\Seewo\EasiNote5", "SkipTouchCheck", 1, Microsoft.Win32.RegistryValueKind.DWord);
                Microsoft.Win32.Registry.SetValue(@"HKEY_CURRENT_USER\SOFTWARE\Seewo\EasiNote5", "EnableMultiTouch", 1, Microsoft.Win32.RegistryValueKind.DWord);
            }
            catch { }
        }

        private static void PatchTouchConfig()
        {
            try
            {
                var configDir = Path.Combine(
                    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                    "Seewo", "EasiNote5", "Config");

                var cfgFile = Path.Combine(configDir, "TouchConfig.ini");
                if (!Directory.Exists(configDir))
                    Directory.CreateDirectory(configDir);

                var lines = new[]
                {
                    "[Touch]",
                    "Enable=1",
                    "Driver=Auto",
                    "ForceEnable=1",
                    "SuppressErrors=1",
                    "SkipDetection=1",
                    "FallbackToMouse=1",
                    "",
                    "[Calibration]",
                    "Enabled=0",
                    "",
                    "[MultiTouch]",
                    "MaxPoints=10",
                    "EnableGesture=1",
                };

                File.WriteAllLines(cfgFile, lines);
            }
            catch { }
        }

        private static void SuppressTouchErrors()
        {
            try
            {
                var localAppData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                var logDir = Path.Combine(localAppData, "Seewo", "EasiNote5", "Logs", "Touch");

                if (Directory.Exists(logDir))
                {
                    foreach (var logFile in Directory.GetFiles(logDir, "*.log"))
                    {
                        try { File.Delete(logFile); } catch { }
                    }
                }

                var seewoRegPath = @"HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Seewo\EasiNote5";
                try
                {
                    Microsoft.Win32.Registry.SetValue(seewoRegPath, "SkipTouchCheck", "1");
                }
                catch { }
            }
            catch { }
        }
    }
}