using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using com.sun.org.apache.xpath.@internal;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Mail;
using InABox.Wpf;
using InABox.WPF;

namespace PRSDesktop;

public enum EmailRootFolder
{
    Inbox,
    Sent
}

public class EmailInterface : BaseObject
{
    [EnumLookupEditor(typeof(EmailRootFolder), Editable = Editable.Disabled)]
    public EmailRootFolder Folder { get; set; }

    [TextBoxEditor(Editable = Editable.Disabled)]
    public string ID { get; set; }

    [DateTimeEditor(Editable = Editable.Disabled)]
    public DateTime Date { get; set; }

    [TextBoxEditor(Editable = Editable.Disabled)]
    public string Subject { get; set; }

    public CustomerLink Customer => InitializeField(ref _customer, nameof(Customer));
    private CustomerLink? _customer;

    public JobLink Job => InitializeField(ref _job, nameof(Job));
    private JobLink? _job;

    public TimeSpan Time { get; set; }
}

public class EmailInterfaceGrid : DynamicGrid<EmailInterface>
{
    public static readonly DependencyProperty RootFolderProperty =
        DependencyProperty.Register(nameof(RootFolder), typeof(EmailRootFolder), typeof(EmailInterfaceGrid));

    public static readonly DependencyProperty
        FolderProperty = DependencyProperty.Register(nameof(Folder), typeof(string), typeof(EmailInterfaceGrid));

    public static readonly DependencyProperty CountProperty = DependencyProperty.Register(nameof(Count), typeof(int), typeof(EmailInterfaceGrid));

    private static readonly ICoreMailer mailer = ClientFactory.CreateMailer();


    public EmailInterfaceGrid()
    {
        Folder = "";
        FromDate = DateTime.MinValue;
        ToDate = DateTime.MaxValue;

        if (Mailer != null)
            try
            {
                Mailer.Connect();
            }
            catch (Exception)
            {
                MessageBox.Show("Unable to connect to email system!\nPlease configure this in User Settings");
            }
        else
            MessageBox.Show("Please configure Email Settings before continuing.");
    }

    protected override void Init()
    {
        base.Init();

        ActionColumns.Add(new DynamicImageColumn(InABox.Wpf.Resources.delete.AsBitmapImage(), EmailActionIgnore)
        { Position = DynamicActionColumnPosition.Start });
        ActionColumns.Add(new DynamicImageColumn(PRSDesktop.Resources.minus.AsBitmapImage(), EmailLessTimeClick));
        ActionColumns.Add(new DynamicImageColumn(PRSDesktop.Resources.plus.AsBitmapImage(), EmailMoreTimeClick));
        ActionColumns.Add(new DynamicImageColumn(PRSDesktop.Resources.tick.AsBitmapImage(), EmailActionClick));
    }

    protected override void DoReconfigure(DynamicGridOptions options)
    {
        base.DoReconfigure(options);
        options.RecordCount = true;
        options.DirectEdit = true;
    }

    public EmailRootFolder RootFolder
    {
        get => (EmailRootFolder)GetValue(RootFolderProperty);
        set => SetValue(RootFolderProperty, value);
    }

    public string Folder
    {
        get => (string)GetValue(FolderProperty);
        set => SetValue(FolderProperty, value);
    }

    public int Count
    {
        get => (int)GetValue(CountProperty);
        set => SetValue(CountProperty, value);
    }

    public Guid EmployeeID { get; set; }

    public Guid ActivityID { get; set; }

    public DateTime FromDate { get; set; }

    public DateTime ToDate { get; set; }

    public ICoreMailer Mailer => mailer;

    //Dictionary<String, Guid> validemails = new Dictionary<String, Guid>();

    protected override DynamicGridColumns LoadColumns()
    {
        var result = new DynamicGridColumns();
        result.Add<EmailInterface>(x => x.Date, 120, "Date", "dd MMM yy HH:mm", Alignment.MiddleCenter);
        result.Add<EmailInterface>(x => x.Folder, 60, "Folder", "", Alignment.MiddleCenter);
        result.Add<EmailInterface>(x => x.ID, 60, "ID", "", Alignment.MiddleCenter);
        result.Add<EmailInterface>(x => x.Customer.ID, 200, "Customer", "", Alignment.MiddleLeft);
        result.Add<EmailInterface>(x => x.Subject, 0, "Subject", "", Alignment.MiddleLeft);
        result.Add<EmailInterface>(x => x.Job.ID, 200, "Job", "", Alignment.MiddleLeft);
        result.Add<EmailInterface>(x => x.Time, 100, "Time", "", Alignment.MiddleCenter);
        //var cols = new Columns<EmailInterface>().Default(ColumnType.IncludeLinked);
        return result;
    }

    public override void DeleteItems(params CoreRow[] rows)
    {
    }

    public override EmailInterface LoadItem(CoreRow row)
    {
        return row.ToObject<EmailInterface>();
    }

    protected override void Reload(
    	Filters<EmailInterface> criteria, Columns<EmailInterface> columns, ref SortOrder<EmailInterface>? sort,
    	CancellationToken token, Action<CoreTable?, Exception?> action)
    {
        var result = new CoreTable();
        result.LoadColumns(typeof(EmailInterface));
        if (Mailer != null && Mailer.IsConnected)
        {
            var folder = Mailer.FindFolder(RootFolder.Equals(EmailRootFolder.Inbox) ? Mailer.Inbox : Mailer.SentItems, Folder);
            if (folder != null)
            {
                var index = Math.Max(folder.Count - Count, 0);
                var messages = Mailer.ListMessages(folder, index, index + (Count - 1));

                var filtered = messages.Where(x => x.Date.Date >= FromDate && x.Date.Date <= ToDate).ToArray();
                foreach (var message in filtered.Reverse())
                    if (message.Date.Date >= FromDate && message.Date.Date <= ToDate)
                    {
                        var email = "";
                        if (RootFolder.Equals(EmailRootFolder.Inbox))
                            email = message.From; // validemails.ContainsKey(message.From.ToUpper()) ? message.From.ToUpper() : "";
                        else
                            email = message.To.First();
                        //foreach (var to in message.To)
                        //{
                        //    if (validemails.ContainsKey(to.ToUpper()))
                        //    {
                        //        email = to.ToUpper();
                        //        break;
                        //    }
                        //}
                        var subject = message.Subject ?? "";

                        if (!string.IsNullOrWhiteSpace(email) && !subject.StartsWith("[PRS:"))
                        {
                            var intf = new EmailInterface();
                            intf.Folder = RootFolder;
                            intf.ID = message.ID;
                            intf.Date = message.Date;
                            intf.Customer.ID = Guid.Empty; // validemails[email];
                            intf.Subject = subject;
                            result.LoadRow(intf);
                        }
                    }
            }
        }

        action.Invoke(result, null);
    }

    public override void SaveItem(EmailInterface item)
    {
    }

    private bool EmailMoreTimeClick(CoreRow? arg)
    {
        if (arg == null)
            return false;

        var t = arg.Get<EmailInterface, TimeSpan>(x => x.Time);
        t = t.Floor(new TimeSpan(0, 15, 0)).Add(new TimeSpan(0, 15, 0));
        UpdateCell(arg.Index, "Time", t);
        return false;
    }

    private bool EmailLessTimeClick(CoreRow? arg)
    {
        if (arg == null)
            return false;

        var t = arg.Get<EmailInterface, TimeSpan>(x => x.Time);
        t = t.Ceiling(new TimeSpan(0, 15, 0)).Subtract(new TimeSpan(0, 15, 0));
        if (t.Ticks < 0L)
            t = new TimeSpan(0);
        UpdateCell(arg.Index, "Time", t);
        return false;
    }

    private bool EmailActionIgnore(CoreRow? row)
    {
        if (row == null)
            return false;

        var id = row.Get<EmailInterface, string>(x => x.ID);
        var fld = RootFolder == EmailRootFolder.Sent ? Mailer.SentItems : Mailer.Inbox;
        var msg = Mailer.GetMessage(fld, id);
        msg.Subject = string.Format("[PRS:Ignore] {0}", msg.Subject);
        msg.Save();
        return true;
    }

    private bool EmailActionClick(CoreRow? arg)
    {
        if (arg == null)
            return false;

        var t = arg.Get<EmailInterface, TimeSpan>(x => x.Time);
        if (t.Ticks == 0L)
        {
            MessageBox.Show("You must select a time");
            return false;
        }

        var bOK = true;

        var jobid = Entity.EntityLinkID<EmailInterface, JobLink>(x => x.Job, arg);
        var jobname = arg.Get<EmailInterface, string>(x => x.Subject);
        var jobnumber = "";

        if (jobid == null)
        {
            if (Security.IsAllowed<CanCreateJobsFromEmails>())
                bOK = MessageBox.Show("Create new job?", "Confirm", MessageBoxButton.OKCancel) == MessageBoxResult.OK;
            jobid = Guid.Empty;
        }
        else
        {
            var job = new Client<Job>().Query(
                new Filter<Job>(x => x.ID).IsEqualTo(jobid),
                Columns.None<Job>().Add(x => x.JobNumber, x => x.Name)).Rows
                .FirstOrDefault();
            jobname = job != null ? job.Get<Job, string>(x => x.Name) : "";
            jobnumber = job != null ? job.Get<Job, string>(x => x.JobNumber) : "";
        }

        if (bOK)
        {
            var ag = new AssignmentGrid();
            ag.OnBeforeSave += (editor, items) =>
            {
                var ass = items.FirstOrDefault() as Assignment;
                if (ass != null)
                {
                    if (!ass.JobLink.IsValid() && Security.IsAllowed<CanCreateJobsFromEmails>())
                    {
                        var job = new Job();
                        job.Name = jobname;
                        job.Customer.ID = arg.Get<EmailInterface, Guid>(x => x.Customer.ID);
                        
                        job.JobType = JobType.Project;

                        job.SiteLead.ID = EmployeeID;
                        job.ProjectLead.ID = EmployeeID;
                        //job.JobStatus = defstatus.ID;

                        job.Notes = new[] { string.Format("As per email dated {0:dd MMM yy}", arg.Get<EmailInterface, DateTime>(x => x.Date)) };
                        new Client<Job>().Save(job, "Created from Email Interface");

                        foreach (var item in items)
                        {
                            ass.JobLink.ID = job.ID;
                            ass.JobLink.JobNumber = job.JobNumber;
                        }
                    }
                }
            };

            var Time = arg.Get<EmailInterface, DateTime>(x => x.Date).TimeOfDay;
            var Duration = arg.Get<EmailInterface, TimeSpan>(x => x.Time);

            var ass = new Assignment();
            ass.Date = arg.Get<EmailInterface, DateTime>(x => x.Date).Date;
            ass.Actual.Start = RootFolder == EmailRootFolder.Inbox ? Time : Time.Subtract(Duration);
            ass.Actual.Duration = Duration;
            ass.Actual.Finish = ass.Actual.Start.Add(ass.Actual.Duration);
            ass.ActivityLink.ID = ActivityID;
            var id = arg.Get<EmailInterface, string>(x => x.ID);
            var fld = RootFolder == EmailRootFolder.Sent ? Mailer.SentItems : Mailer.Inbox;
            var msg = Mailer.GetMessage(fld, id);
            ass.Description = msg.Body != null ? CoreUtils.StripHTML(msg.Body) : "";
            //ass.Completed = DateTime.Now;
            ass.EmployeeLink.ID = EmployeeID;
            ass.JobLink.ID = jobid ?? Guid.Empty;
            if (ag.EditItems(new[] { ass }))
            {
                msg.Subject = ass.JobLink.IsValid()
                    ? string.Format("[PRS:{0}] {1}", ass.JobLink.JobNumber, msg.Subject)
                    : string.Format("[PRS:No Job] {0}", msg.Subject);
                msg.Save();
                return true;
            }
        }

        return false;
    }
}

/// <summary>
///     Interaction logic for EmailInterfaceForm.xaml
/// </summary>
public partial class EmailInterfaceForm : ThemableWindow
{
    public EmailInterfaceForm()
    {
        InitializeComponent();

        Preview.VisibleButtons = RichTextEditorButtons.None;

        Emails.OnSelectItem += Emails_OnSelectItem;

        var me = new Client<Employee>().Load(new Filter<Employee>(x => x.UserLink.ID).IsEqualTo(ClientFactory.UserGuid)).FirstOrDefault();
        Emails.EmployeeID = me?.ID ?? Guid.Empty;
        Emails.ActivityID = Guid.Empty;
        Employee.Content = me != null ? me.Name : "(No Employee Found)";
    }

    public DateTime FromDate
    {
        get => Emails.FromDate;
        set => Emails.FromDate = value;
    }

    public DateTime ToDate
    {
        get => Emails.ToDate;
        set => Emails.ToDate = value;
    }

    private void Emails_OnSelectItem(object sender, DynamicGridSelectionEventArgs e)
    {
        var row = e.Rows?.FirstOrDefault();
        if (!Emails.Mailer.IsConnected || row == null)
            return;

        var fld = Folder.SelectedIndex == 1 ? Emails.Mailer.SentItems : Emails.Mailer.Inbox;
        var mailer = Emails.Mailer;
        Task.Run(() =>
        {
            var id = row.Get<EmailInterface, string>(x => x.ID);

            var msg = mailer.GetMessage(fld, id);
            var text = CoreUtils.StripHTML(msg.Body);
            Dispatcher.BeginInvoke(new Action(() => { Preview.Text = text; }));
        });
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        Emails.Refresh(true, true);
    }

    private void Folder_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (Emails == null || !Emails.IsLoaded)
            return;
        Emails.RootFolder = Folder.SelectedIndex == 1 ? EmailRootFolder.Sent : EmailRootFolder.Inbox;
        Emails.Refresh(false, true);
    }

    private void Items_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (Emails == null || !Emails.IsLoaded)
            return;
        var value = ((ComboBoxItem)Items.SelectedValue).Content.ToString() ?? "";
        var count = value.Equals("All Items") ? int.MaxValue : int.Parse(value);
        Emails.Count = count;
        Emails.Refresh(false, true);
    }
}