namespace firefoxCloser
{
    public partial class Form1 : Form
    {
        private Process[] processes;
        static private string txt="";
        private static List<IntPtr> handles = new List<IntPtr>();
        private static List<string> captions = new List<string>();
        private IntPtr mainHwnd;
        
        public Form1()
        {
            InitializeComponent();
            this.ShowProcesses();
        }

        private delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr lParam);
        private delegate bool EnumWindowsChildProc(IntPtr hWnd, IntPtr lParam);

        [DllImport("User32.dll")]
        private static extern bool EnumChildWindows(IntPtr hWnd,EnumWindowsChildProc enumFunc,IntPtr lParam);

        [DllImport("User32.dll")]
        private static extern bool EnumWindows(EnumWindowsProc enumFunc, IntPtr lParam);

        [DllImport("User32.dll")]
        private static extern bool GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("User32.dll")]
        private static extern bool PostMessage(IntPtr hWnd, uint msg, uint wParam, uint lParam);

        private static bool EnumFunc(IntPtr hWnd, IntPtr lParam)
        {
            const uint WM_CLOSE = 0x0010;

            StringBuilder wndCaption = new StringBuilder(1024);

            GetWindowText(hWnd, wndCaption, 1024);

            if (wndCaption.ToString() == txt)
            {
                EnumChildWindows(hWnd,new EnumWindowsChildProc(CloseChildren), IntPtr.Zero );
                return false;
            }
            else
            {
                return true;
            }
        }
        
        private static bool CloseChildren(IntPtr hWnd, IntPtr lParam)
        {
            const uint WM_CLOSE = 0x0010;

            StringBuilder wndCaption = new StringBuilder(1024);

            GetWindowText(hWnd, wndCaption, 1024);
            if(wndCaption.ToString()!="")
                captions.Add(wndCaption.ToString());
            handles.Add(hWnd);
            //PostMessage(hWnd, WM_CLOSE, 0, 0);
            return true;
        }

        private void ShowProcesses()
        {
            handles.Clear();
            processes = Process.GetProcessesByName("firefox");
            foreach(Process proc in processes)
            {
                this.mainHwnd = proc.MainWindowHandle;
                txt = proc.MainWindowTitle.ToString();
                this.richTextBox1.Text += proc.ProcessName+txt+"\n";
            }
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            foreach (Process proc in processes)
            {
                try
                {
                    EnumWindows(new EnumWindowsProc(EnumFunc), IntPtr.Zero);
                    foreach (IntPtr ptr in handles)
                        this.richTextBox2.Text += ptr.ToString() + "\n";
                    foreach (string str in captions)
                        this.richTextBox3.Text += str+ "\n";

                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        private void GetProcessesById()
        {
            Process proc;
            foreach(IntPtr ptr in handles)
            {
                try
                {
                    proc = Process.GetProcessById(ptr.ToInt32());
                    this.richTextBox3.Text += "***" + ptr.ToString() + "***" + "\n";
                    this.richTextBox3.Text += proc.MainWindowTitle.ToString() + "\n";
                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }
    }
}