using System;
using System.Diagnostics;
using System.Linq;

namespace VDash.WindowSelectors
{
    public class FromProcessName : IWindowSelector
    {
        string m_ProcName = "";
        public FromProcessName(string procName)
        {
            if (string.IsNullOrWhiteSpace(procName))
            {
                throw new ArgumentNullException("procName", "procName must not be null, whitespace, or empty.");
            }

            m_ProcName = procName;
        }

        public Process[] GetProcesses()
        {
            return Process.GetProcessesByName(m_ProcName);
        }

        public Process GetProcess()
        {
            var procs = GetProcesses();

            if (procs.Count() <= 0)
            {
                throw new WindowNotFoundException($"No process found with name {m_ProcName}.");
            }
            return procs.First();
        }
        public IntPtr GetWindowHandle()
        {
            return GetProcess().MainWindowHandle;
        }

        public WindowInfo GetWindowInfo()
        {
            var ret = WindowInfo.GetWindowList().SingleOrDefault(x => x.hWnd == GetWindowHandle());
            if(ret == null)
            {
                throw new WindowNotFoundException($"Unable to locate window for process {m_ProcName}.");
            }
            return ret;
        }
    }
}