using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace ytdlp_gui
{
    public class Program
    {
        public Program(string name)
        {
            // Check for extension
            if (Path.GetExtension(name) == "")
                // If missing, add .exe as default
                name += ".exe";

            // Is the program next to us?
            string exe_path = System.Reflection.Assembly.GetEntryAssembly().Location;
            string exe_directory = Path.GetDirectoryName(exe_path);
            program = Path.Combine(exe_directory, name);

            // Did we find it?
            if (File.Exists(program))
                // Finish if we did
                return;

            // Otherwise...
            // Get list of PATHs on Windows
            string[] paths = System.Environment.GetEnvironmentVariable("PATH").Split(';');

            // Check for program on every path
            foreach (string path in paths)
            {
                program = Path.Combine(path, name);
                if (File.Exists(program))
                    // Finish if we found it
                    return;
            }

            // We could not find the program
            throw new Exception("Could not find "+name);
        }

        public readonly string program;
    }
}