using System;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Windows.Controls;
using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using PRSDesktop.WidgetGroups;

namespace PRSDesktop
{
    public class TaskWidgetProperties : IUserConfigurationSettings, IDashboardProperties { }

    public class TaskWidgetElement : DashboardElement<TaskWidget, Common, TaskWidgetProperties> { }

    /// <summary>
    ///     Interaction logic for TaskWidget.xaml
    /// </summary>
    public partial class TaskWidget : UserControl, IDashboardWidget<Common, TaskWidgetProperties>
    {
        private DateTime _date = DateTime.Today;

        private Guid _groupid = CoreUtils.FullGuid;

        private readonly DataTable report = new();

        private CoreTable tasks;

        public TaskWidget()
        {
            InitializeComponent();
            report.Columns.Add("ID", typeof(Guid));
            report.Columns.Add("Name", typeof(string));
            report.Columns.Add("Current", typeof(int));
            report.Columns.Add("Others", typeof(int));
            report.Columns.Add("New", typeof(int));
            report.Columns.Add("Closed", typeof(int));
            report.Columns.Add("Overdue", typeof(int));
            report.PrimaryKey = new[] { report.Columns[0] };
        }

        public DateTime Date
        {
            get => _date;
            set
            {
                _date = value;
                LoadTasks();
            }
        }

        public Guid GroupID
        {
            get => _groupid;
            set
            {
                _groupid = value;
                LoadTasks();
            }
        }

        public TaskWidgetProperties Properties { get; set; }
        public event LoadSettings<TaskWidgetProperties>? LoadSettings;
        public event SaveSettings<TaskWidgetProperties>? SaveSettings;

        public void Setup()
        {
        }

        public void Refresh()
        {
            LoadTasks();
        }

        public void Shutdown(CancelEventArgs? cancel)
        {
        }

        private void LoadTasks()
        {
            Report.ItemsSource = null;
            tasks = null;

            var filter = new Filter<Kanban>(x => x.Created).IsLessThanOrEqualTo(Date.AddDays(1));

            filter.Ands.Add(new Filter<Kanban>(x => x.EmployeeLink.StartDate).IsEqualTo(DateTime.MinValue).Or(x => x.EmployeeLink.StartDate)
                .IsLessThanOrEqualTo(Date));

            filter.Ands.Add(new Filter<Kanban>(x => x.EmployeeLink.FinishDate).IsEqualTo(DateTime.MinValue).Or(x => x.EmployeeLink.FinishDate)
                .IsGreaterThanOrEqualTo(Date));

            filter.Ands.Add(new Filter<Kanban>(x => x.Completed).IsEqualTo(DateTime.MinValue).Or(x => x.Completed).IsGreaterThanOrEqualTo(Date));

            filter.Ands.Add(new Filter<Kanban>(x => x.Closed).IsEqualTo(DateTime.MinValue).Or(x => x.Closed).IsGreaterThanOrEqualTo(Date));

            if (!_groupid.Equals(CoreUtils.FullGuid))
                filter.Ands.Add(new Filter<Kanban>(x => x.EmployeeLink.Group.ID).IsEqualTo(_groupid).Or(x => x.ManagerLink.ID).IsEqualTo(_groupid));

            new Client<Kanban>().Query(
                filter,
                null,
                new SortOrder<Kanban>(x => x.EmployeeLink.Name),
                (o, e) =>
                {
                    tasks = o;
                    CheckData();
                }
            );
        }

        private void CheckData()
        {
            if (tasks != null)
                ProcessData();
        }

        private void ProcessData()
        {
            try
            {
                report.Rows.Clear();
                foreach (var task in tasks.Rows)
                {
                    var empid = task.Get<Kanban, Guid>(x => x.EmployeeLink.ID);
                    var empValid = Entity.IsEntityLinkValid<Kanban, EmployeeLink>(x => x.EmployeeLink, task);
                    var empname = task.Get<Kanban, string>(x => x.EmployeeLink.Name);

                    if (empValid && report.Rows.Find(empid) == null)
                    {
                        var rows = tasks.Rows.Where(r => r.Get<Kanban, Guid>(c => c.EmployeeLink.ID).Equals(empid));
                        int? mine = null;
                        int? others = null;
                        int? created = null;
                        int? closed = null;
                        int? overdue = null;

                        foreach (var row in rows)
                        {
                            var taskemp = row.Get<Kanban, Guid>(x => x.EmployeeLink.ID);
                            var taskmgr = row.Get<Kanban, Guid>(x => x.ManagerLink.ID);
                            var taskcreated = row.Get<Kanban, DateTime>(x => x.Created).Date;
                            var taskclosed = row.Get<Kanban, DateTime>(x => x.Completed).Date;
                            if (taskclosed.IsEmpty())
                                taskclosed = row.Get<Kanban, DateTime>(x => x.Closed).Date;
                            var taskdue = row.Get<Kanban, DateTime>(x => x.DueDate).Date;

                            if (taskemp.Equals(empid))
                                mine = mine.HasValue ? mine.Value + 1 : 1;
                            if (taskmgr.Equals(empid) && !taskemp.Equals(empid))
                                others = others.HasValue ? others.Value + 1 : 1;
                            if (taskcreated.Equals(_date) && taskemp.Equals(empid))
                                created = created.HasValue ? created.Value + 1 : 1;
                            if (taskclosed.Equals(_date) && taskemp.Equals(empid))
                                closed = closed.HasValue ? closed.Value + 1 : 1;
                            if (taskdue < _date && taskclosed.IsEmpty())
                                overdue = overdue.HasValue ? overdue.Value + 1 : 1;
                        }

                        if (mine.HasValue || others.HasValue || created.HasValue || closed.HasValue || overdue.HasValue)
                            report.Rows.Add(empid, empname, mine, others, created, closed, overdue);
                    }
                }
            }
            catch (Exception e)
            {
                Logger.Send(LogType.Error, "", string.Format("*** Unknown Error: {0}\n{1}", e.Message, e.StackTrace));
            }

            Dispatcher.Invoke(() => { Report.ItemsSource = report; });
        }
    }
}