using System.CommandLine;
using System.Diagnostics;
using Microsoft.Scripting.Utils;
using MycroForge.CLI.Commands.Interfaces;

namespace MycroForge.CLI.Commands;

public partial class MycroForge
{
    public partial class Script
    {
        public class Create : Command, ISubCommandOf<Script>
        {
            private static readonly Argument<string> NameArgument =
                new(name: "name", description: "The name of the script");

            public Create() : base(name: "create", description: "Create a script")
            {
                AddArgument(NameArgument);
                this.SetHandler(ExecuteAsync, NameArgument);
            }

            private async Task ExecuteAsync(string name)
            {
                var path = await CreateFile(name);
                await OpenFile(path);
            }

            private static async Task<string> CreateFile(string? name = null, string fileExtension = "py")
            {
                var folder = Path.Join(
                    Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".m4g"
                );

                Directory.CreateDirectory(folder);

                var filePath = Path.Join(folder, $"{name}.{fileExtension}");

                if (File.Exists(filePath))
                    throw new Exception($"File {filePath} already exists.");

                await File.WriteAllTextAsync(filePath, string.Empty);

                return filePath;
            }

            private static async Task OpenFile(string file)
            {
                var process = new Process
                {
                    StartInfo = new ProcessStartInfo
                    {
                        FileName = "code",
                        Arguments = $"--wait {file}",
                        WindowStyle = ProcessWindowStyle.Hidden,
                        UseShellExecute = true,
                    }
                };

                process.Start();

                await process.WaitForExitAsync();
            }
        }
    }
}