using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using Comal.Classes;
using FastReport.DataVisualization.Charting;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using PRSDesktop.Panels.Employees;
using Xceed.Wpf.Toolkit.PropertyGrid;

namespace PRSDesktop
{
    internal class EmployeeGrid : DynamicDataGrid<Employee>
    {
        private bool ShowAll;

        private Button SendFormButton = null!;

        public EmployeeGrid()
        {
        }

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

            HiddenColumns.Add(x => x.Code);
            
            HiddenColumns.Add(x=>x.RosterTemplate.ID);
            HiddenColumns.Add(x=>x.RosterTemplate.Code);
            HiddenColumns.Add(x => x.RosterStart);

            ActionColumns.Add(new DynamicScheduleEditorColumn<Employee>());
            HiddenColumns.Add(x => x.ActiveSchedules);

            HiddenColumns.Add(x => x.Thumbnail.ID);
            HiddenColumns.Add(x => x.Thumbnail.FileName);
            ActionColumns.Add(new DynamicImageManagerColumn<Employee>(this, x => x.Thumbnail, true) { Position = DynamicActionColumnPosition.Start });
            ActionColumns.Add(new DynamicMenuColumn(MenuBuild) { Position = DynamicActionColumnPosition.End });

            // AddButton("Activities", PRSDesktop.Resources.quality.AsBitmapImage(), ShowActivities);
            // AddButton("Available Forms", PRSDesktop.Resources.kanban.AsBitmapImage(), ShowRoleForms);

            //ActionColumns.Add(new DynamicEmployeeStatusColumn<Employee>(x => x.InOut));
            //HiddenColumns.Add(x => x.InOut);

            AddButton("Show All", PRSDesktop.Resources.anonymous.AsBitmapImage(Color.White), ToggleFinishedEmployees);

            SendFormButton = AddButton("Send Form", PRSDesktop.Resources.kanban.AsBitmapImage(Color.White), CreateEmployeeForms);
        }

        protected override void SelectItems(CoreRow[]? rows)
        {
            base.SelectItems(rows);

            SendFormButton.IsEnabled = rows is not null && rows.Length > 0;
        }

        private bool CreateEmployeeForms(Button button, CoreRow[] rows)
        {
            if(rows.Length == 0)
            {
                MessageBox.Show("Please select at least one row.");
                return false;
            }

            var select = new MultiSelectDialog<DigitalForm>(
                LookupFactory.DefineFilter<EmployeeForm, DigitalForm>(Array.Empty<EmployeeForm>()),
                LookupFactory.DefineColumns<DigitalForm>()
                    .Add(x => x.ID)
                    .Add(x => x.Description),
                false);
            if (select.ShowDialog() == true)
            {
                var digitalForm = select.Data().Rows.FirstOrDefault()?.ToObject<DigitalForm>();

                if (digitalForm is not null)
                {
                    var employees = Client.Query(
                        new Filter<EmployeeDigitalForm>(x => x.Form.ID).IsEqualTo(digitalForm.ID),
                        new Columns<EmployeeDigitalForm>(x => x.Employee.ID))
                        .Rows.Select(x => x.Get<EmployeeDigitalForm, Guid>(x => x.Employee.ID))
                        .ToArray();
                    var selectedEmployees = rows.Select(x => x.ToObject<Employee>()).ToArray();
                    var warningEmployees = selectedEmployees.Where(x => !employees.Contains(x.ID)).ToArray();
                    if (warningEmployees.Any())
                    {
                        var message = "The selected form is not usually available for ";

                        if(warningEmployees.Length == 1)
                        {
                            message += warningEmployees[0].Code;
                        }
                        else
                        {
                            message += string.Join(',', warningEmployees.Take(warningEmployees.Length - 1).Select(x => x.Code))
                                + " and " + warningEmployees.Last().Code;
                        }
                        message += ", since it has not been assigned to their role";
                        if(warningEmployees.Length > 1)
                        {
                            message += "s";
                        }
                        message += "; do you still wish to send this form?";

                        var result = MessageBox.Show(message, "Confirm", MessageBoxButton.YesNo);
                        if(result != MessageBoxResult.Yes)
                        {
                            MessageBox.Show("Sending form cancelled.");
                            return false;
                        }
                    }

                    var employeeForms = new List<EmployeeForm>(rows.Length);
                    foreach(var employee in selectedEmployees)
                    {
                        var employeeForm = new EmployeeForm();
                        employeeForm.Form.ID = digitalForm.ID;
                        employeeForm.Description = digitalForm.Description;
                        employeeForm.Parent.ID = employee.ID;
                        employeeForms.Add(employeeForm);
                    }
                    Client.Save(employeeForms, "Assigned to employee by user");
                    MessageBox.Show("Form sent.");
                }
            }
            return false;
        }

        protected override void DoReconfigure(FluentList<DynamicGridOption> options)
        {
            base.DoReconfigure(options);
            options.AddRange(
                DynamicGridOption.FilterRows,
                DynamicGridOption.SelectColumns,
                DynamicGridOption.MultiSelect
            );
        }

        private void MenuBuild(DynamicMenuColumn column, CoreRow? row)
        {
            if (row is null) return;
            var newItem = column.AddItem("Digital Forms", null, null);
            DynamicGridUtils.PopulateFormMenu<EmployeeForm, Employee, EmployeeLink>(
                newItem,
                row.Get<Employee, Guid>(x => x.ID),
                row.ToObject<Employee>);

            column.AddSeparator();

            column.AddItem("Activities", PRSDesktop.Resources.quality, ShowActivitiesWindow);
            column.AddItem("Available Forms", PRSDesktop.Resources.kanban, ShowRoleFormsWindow);
        }

        private void ShowActivitiesWindow(CoreRow? row)
        {
            if (row is null) return;

            DynamicGridUtils.CreateGridWindow("Employee Activities",
                new EmployeeActivityGrid() { Left = row.ToObject<Employee>() }).ShowDialog();
        }
        private void ShowRoleFormsWindow(CoreRow? row)
        {
            if (row is null) return;

            DynamicGridUtils.CreateGridWindow("Employee Role Forms",
                new EmployeeRoleFormGrid() { Left = row.ToObject<Employee>() }).ShowDialog();
        }
        private bool ShowActivities(Button button, CoreRow[] rows)
        {
            if(rows.Length == 0)
            {
                MessageBox.Show("Please select an employee.");
                return false;
            }
            else if(rows.Length > 1)
            {
                MessageBox.Show("Please select only one employee");
                return false;
            }

            ShowActivitiesWindow(rows[0]);

            return false;
        }

        private bool ShowRoleForms(Button button, CoreRow[] rows)
        {
            if(rows.Length == 0)
            {
                MessageBox.Show("Please select an employee.");
                return false;
            }
            else if(rows.Length > 1)
            {
                MessageBox.Show("Please select only one employee");
                return false;
            }

            ShowRoleFormsWindow(rows[0]);

            return false;
        }

        public Employee[] Employees { get; private set; }

        private bool ToggleFinishedEmployees(Button btn, CoreRow[] rows)
        {
            ShowAll = !ShowAll;
            UpdateButton(btn, PRSDesktop.Resources.anonymous.AsBitmapImage(Color.White), ShowAll ? "Hide Finished" : "Show All");
            return true;
        }

        protected override void Reload(Filters<Employee> criteria, Columns<Employee> columns, ref SortOrder<Employee>? sort, Action<CoreTable?, Exception?> action)
        {
            if (!ShowAll)
                criteria.Add(new Filter<Employee>(x => x.FinishDate).IsEqualTo(DateTime.MinValue));

            base.Reload(criteria, columns, ref sort, action);
        }

        protected override BaseEditor? GetEditor(object item, DynamicGridColumn column)
        {
            if (column.ColumnName.StartsWith($"{nameof(Employee.OrgChart)}."))
            {
                if (!Security.IsAllowed<CanEditOrgChart>())
                    return new NullEditor();
                var orgChartSettings = new GlobalConfiguration<OrgChartSettings>().Load();
                if (orgChartSettings.Layout != OrgChartLayout.Employee)
                    return new NullEditor();
            }
            return base.GetEditor(item, column);
        }
        
        
    }
}