using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Net.Mime;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MailSend_Lesebestätigung
{
    public partial class Form1 : FormEx
    {
        SynchronizationContext synccontext;

        private string mail_path = $@"{Application.StartupPath}\Serienbriefe";
        private FHelp helpForm = new FHelp();



        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Directory.CreateDirectory(mail_path);
            listViewEx1.DoubleBuffer(true);
        }

        private void abtnAD_Click(object sender, EventArgs e)
        {
            synccontext = SynchronizationContext.Current;
            File.Delete("ad_users.csv");
            LoadADColumns();
            Task.Run(delegate
            {
                lADload.Loading("AD wird ausgelesen", "Fertig", () =>
                {
                    foreach (UserPrincipal user in ActiveDirectory.GetUsers(new PrincipalContext(ContextType.Domain, "Domainname", Properties.Settings.Default.LDAPcontainer)))
                    {
                        if (user.Enabled != true || user.GetProperty("employeeID") == "")
                            continue;
                        string[] userinfo = Properties.Settings.Default.ADuserProps.Split(',').Select(prop => user.GetProperty(prop.Split(':')[1])).ToArray();
                        //string[] userinfo = { user.GetProperty("givenname"), user.GetProperty("sn"), user.GetProperty("department"), user.EmailAddress, user.GetProperty("employeeID"), user.SamAccountName };
                        File.AppendAllText("ad_users.csv", $@"{string.Join(";", userinfo)}{Environment.NewLine}");
                        var item = new ListViewItemEx(userinfo[0]);
                        item.SubItems.AddRange(userinfo.Skip(1).ToArray());
                        listViewEx1.Invoke(new MethodInvoker(delegate { listViewEx1.Items.Add(item); }));
                    }
                    listViewEx1.Invoke(new MethodInvoker(delegate
                    {
                        listViewEx1.SortByColumn(1, SortOrder.Ascending);
                        listViewEx1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent);
                    }));
                });
            });
        }


        private void LoadADColumns()
        {
            listViewEx1.Clear();
            listViewEx1.Columns.AddRange(Properties.Settings.Default.ADuserProps.Split(',').Select(prop => new ColumnHeader() { Text = prop.Split(':')[0], Name = prop.Split(':')[1] }).ToArray());
        }


        private void LoadMailColumns()
        {
            listViewEx1.Clear();
            listViewEx1.Columns.Add("E-Mail");
            listViewEx1.Columns.Add("Dateiname");
            listViewEx1.Columns.Add("Fehler");
        }

        async private void animationButton1_Click(object sender, EventArgs e)
        {
            await GetMails();
            foreach (ListViewItemEx item in listViewEx1.Items)
            {
                try
                {
                    string mailaddress = item.Text;
                    string filename = item.SubItems[1].Text;
                    string fullfilename = $@"{mail_path}\{mailaddress}\{filename}";

                    var mail = new SendMail("[Mailserver]", 25, "[Mail-User]", "[Mail-User-Pass]");
                    Attachment attachment = new Attachment(fullfilename, new ContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document"));
                    MailMessage mailmessage = new MailMessage(new MailAddress("[Mail-Adress]", "[From]"), new MailAddress(mailaddress)) { IsBodyHtml = true };
                    mailmessage.Subject = "Bestätigung zur Einhaltung der Verhaltensregeln";

                    string mailbody = File.ReadAllText(Properties.Settings.Default.MailBody);

                    var user = ActiveDirectory.GetUser(new PrincipalContext(ContextType.Domain, "[Domainname], Properties.Settings.Default.LDAPcontainer), new MailAddress(mailaddress));

                    Properties.Settings.Default.MailBodyReplacements.Cast<string>().ToList().ForEach(replacement =>
                    {
                        mailbody = mailbody.Replace($"%{replacement.Split(':')[0]}%", user.GetProperty(replacement.Split(':')[1]));
                    });


                    mailmessage.Body = mailbody;
                    //mailmessage.Body = File.ReadAllText(Properties.Settings.Default.MailBody).Replace("%UserName%", filename.Split(',')[0]);
                    mailmessage.Attachments.Add(attachment);
                    var send = mail.Send(mailmessage);
                    if (send == MailSendStatus.Fail)
                    {
                        item.HeaderColor = Color.OrangeRed;
                        item.SubItems.Add("Mail nicht versendet");
                    }
                    else
                    {
                        item.HeaderColor = Color.Honeydew;
                    }
                }
                catch (Exception ex)
                {
                    item.HeaderColor = Color.OrangeRed;
                    item.SubItems.Add("Mail nicht versendet");
                    File.WriteAllText("log.log", ex.ToString() + Environment.NewLine + Environment.NewLine);
                }
            }
        }



        async private Task GetMails()
        {
            LoadMailColumns();
            var dir = new DirectoryInfo(mail_path);

            foreach (var subdir in dir.GetDirectories())
            {
                FileInfo file = subdir.GetFiles()[0];
                var item = new ListViewItemEx(subdir.Name);
                item.SubItems.Add(new ListViewItem.ListViewSubItem(item, file.Name) { Name = listViewEx1.Columns[item.SubItems.Count].Name });

                listViewEx1.Invoke(new MethodInvoker(delegate
                {
                    listViewEx1.Items.Add((ListViewItemEx)item);
                    listViewEx1.EnsureVisible(listViewEx1.Items.Count - 1);
                }));

                await Task.Delay(1);
            }
            listViewEx1.SortByColumn(1, SortOrder.Ascending);
            listViewEx1.AutoResizeColumns(ColumnHeaderAutoResizeStyle.ColumnContent);
        }



        private void abtnPath_Click(object sender, EventArgs e)
        {
            Process.Start(mail_path);
        }

        private void abtnHelp_Click(object sender, EventArgs e)
        {
            if(helpForm.Visible == false)
                helpForm.Show();
            else
                helpForm.Hide();

        }

        async private void abtnShowMails_Click(object sender, EventArgs e)
        {
            await GetMails();
        }
    }
}