using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Reflection;

namespace ButcherManage.BO.Utils
{
  public static class FormUtil
  {
    public static Form CreateFrom()
    {
      var dll = Path.Combine(Directory.GetCurrentDirectory(), "ButcherManage.Form.dll");
      if (!File.Exists(dll))
        throw new Exception("缺少必要的程序集文件 ButcherManage.Form.dll");

      var formType = typeof(IWithRoleForm);
      Form form = null;
      foreach (var type in Assembly.LoadFile(dll).GetTypes())
      {
        if (formType.IsAssignableFrom(type))
        {
          var instance = (IWithRoleForm)Activator.CreateInstance(type);
          foreach (var item in instance.RoleName)
          {
            if (AppContext.Worker.RoleList.Contains(item))
              return instance.Generate();
          }
        }
      }
      return form;
    }
  }

  public interface IWithRoleForm
  {
    List<short> RoleName { get; }

    Form Generate();
  }
}