using System;
using System.Drawing;
using System.IO;

public static class DisplayFusionFunction
	{
		public static void Run()
			{
                //Read/Write file Variables, used to determine current monitor states
                string appdata = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData); //Appdata Roaming folder
                string folder = @"\displayfusionscripts\"; //scripts folder
                string folderPath = appdata + folder;
                string path = appdata + folder + "data.txt"; //full file path
                
                //First time setup, create directory and data.txt in appdata
                if(!File.Exists(path)){
                    createFile(folderPath, path);
                }
                
                //Read file
                StreamReader sr = new StreamReader(path);
                string data = sr.ReadLine();
                sr.Close();
                
                string c = "/clone";
                string e = "/extend";
                //Check data, change data.txt for next use                
                if(data == c) {
                    writeToFile(path, e);
                } else if (data == e) {
                    writeToFile(path, c);
                } else {
                    writeToFile(path, c);
                }
                
                //run built-in Windows DisplaySwitch.exe with the /extend
                BFS.Application.Start("DisplaySwitch.exe", data);
			}

        //Creates directory and file if they don't exist
        static void createFile(string folderPath, string path){
            Directory.CreateDirectory(folderPath);
            File.Create(path);
        }
        
        
        //Writes data to file
        static void writeToFile(string path, string data) {
            try{
                StreamWriter sw = new StreamWriter(path);
                sw.WriteLine(data);
                sw.Close();
            }  
            catch(Exception e){
                Console.WriteLine(e.Message);
                
            }
        }
    }