using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;

namespace PRSDesktop;

public class KanbanGridSettings : IUserConfigurationSettings
{
    public string[] RecentTags { get; set; } = [];
}

public abstract class BaseKanbanGrid : DynamicDataGrid<Kanban>
{
    protected abstract TaskPanelProperties Properties { get; }

    protected KanbanGridSettings Settings { get; private set; }

    public BaseKanbanGrid()
    {
        Settings = new UserConfiguration<KanbanGridSettings>().Load();

        ActionColumns.Add(new DynamicImageColumn(PRSDesktop.Resources.menu.AsBitmapImage(), FormMenuClick));

        HiddenColumns.Add(x => x.EmployeeLink.ID);
    }

    protected override void DoValidate(Kanban[] items, List<string> errors)
    {
        base.DoValidate(items, errors);

        if (Properties.RequireTaskTypes && items.Any(x => x.Type.ID == Guid.Empty))
        {
            errors.Add("[Task Type] may not be blank!");
        }
    }

    protected override void DoReconfigure(DynamicGridOptions options)
    {
        base.DoReconfigure(options);

        options.SelectColumns = true;
        options.FilterRows = true;
        options.RecordCount = true;
        options.PageSize = 1000;
    }

    private bool FormMenuClick(CoreRow? row)
    {
        if (row is null)
            return false;

        var kanbanID = row.Get<Kanban, Guid>(x => x.ID);

        var menu = new ContextMenu();

        var digitalForms = menu.AddItem("Digital Forms", null, null);

        DynamicGridUtils.PopulateFormMenu<KanbanForm, Kanban, KanbanLink>(digitalForms, kanbanID, () => row.ToObject<Kanban>());

        menu.AddItem("Manage Subscribers", null, row, Subscribers_Click);

        menu.IsOpen = true;

        return false;
    }

    private void Subscribers_Click(CoreRow row)
    {
        var kanban = row.ToObject<Kanban>();
        TaskPanel.ManageSubscribers(kanban);
    }

    protected override void CustomiseEditor(IDynamicEditorForm sender, Kanban[]? items, DynamicGridColumn column, BaseEditor editor)
    {
        var kanban = items?.FirstOrDefault();
        if (kanban is null) return;

        var bFullControl = IsFullControl(new[] { kanban });
        bool? enabled = null;
        switch (column.ColumnName)
        {
            case "Private":
                enabled = kanban.EmployeeLink.ID == App.EmployeeID && kanban.ManagerLink.ID == App.EmployeeID;
                break;
            case "Description":
                enabled = kanban.ID == Guid.Empty || (bFullControl && !kanban.Private);
                break;
            case "EmployeeLink.ID":
                enabled = bFullControl && !kanban.Private;
                break;
            case "ManagerLink.ID":
                enabled = bFullControl && !kanban.Private;
                break;
            case "Category":
                enabled = bFullControl && !kanban.Private;
                break;
            case "Closed":
                enabled = bFullControl || Security.IsAllowed<CanCloseOthersTasks>();
                break;
        }
        if(enabled != null)
        {
            editor.Editable = enabled.Value ? Editable.Enabled : Editable.Disabled;
        }
    }

    protected override void OnCreateEditorControl(string column, BaseEditor editor, IDynamicEditorControl control)
    {
        base.OnCreateEditorControl(column, editor, control);

        if(column == nameof(Kanban.Tags) && control is TagsEditorControl tagsEditor)
        {
            tagsEditor.RecentTags = Settings.RecentTags.ToList();
            tagsEditor.OnRecentTagsChanged += TagsEditor_OnRecentTagsChanged;
        }
    }

    private void TagsEditor_OnRecentTagsChanged(IEnumerable<string> tags)
    {
        var lst = tags.ToArray();
        if(lst.Length > 15)
        {
            var newArr = new string[15];
            Array.Copy(lst, lst.Length - 15, newArr, 0, 15);
            Settings.RecentTags = newArr;
        }
        else
        {
            Settings.RecentTags = lst;
        }
        new UserConfiguration<KanbanGridSettings>().Save(Settings);
    }

    private bool IsFullControl(Kanban[] kanbans)
    {
        foreach (var kanban in kanbans)
        {
            if (!App.EmployeeID.Equals(kanban.ManagerLink.ID) && !App.EmployeeID.Equals(kanban.EmployeeLink.ID))
            {
                // If you can change others tasks, IsFullControl is true - but we don't check at the beginning of the function
                // to save checking security tokens every time.
                return Security.IsAllowed<CanChangeOthersTasks>();
            }
        }
        return true;
    }

    protected override Dictionary<string, object?> EditorValueChanged(IDynamicEditorForm editor, Kanban[] items, string name, object value)
    {
        var result = base.EditorValueChanged(editor, items, name, value);

        if (name == "Type.ID")
        {
            //ReloadForms<Kanban, KanbanForm, KanbanTypeForm>(editor, items.FirstOrDefault(), x => x.Type.ID,
            //    value != null ? (Guid)value : Guid.Empty);
        }
        else if (name == "EmployeeLink.ID")
        {
            var enabled = items.FirstOrDefault()?.ManagerLink.UserLink.ID == ClientFactory.UserGuid &&
                          (Guid)(value ?? Guid.Empty) == items.FirstOrDefault()?.ManagerLink.ID;
            editor.FindEditor("Private").IsEnabled = enabled;
        }
        else if (name == "ManagerLink.ID")
        {
            var enabled = items.FirstOrDefault()?.EmployeeLink.UserLink.ID == ClientFactory.UserGuid &&
                          (Guid)(value ?? Guid.Empty) == items.FirstOrDefault()?.EmployeeLink.ID;
            editor.FindEditor("Private").IsEnabled = enabled;
        }
        else if (name == "Private")
        {
            var enabled = !Equals(value, true);
            var employeeEditor = editor.FindEditor("EmployeeLink.ID");
            var managerEditor = editor.FindEditor("ManagerLink.ID");
            employeeEditor.IsEnabled = enabled;
            managerEditor.IsEnabled = enabled;
            if (!enabled)
            {
                employeeEditor.SetValue(employeeEditor.ColumnName, App.EmployeeID);
                managerEditor.SetValue(managerEditor.ColumnName, App.EmployeeID);

                foreach(var item in items)
                {
                    item.EmployeeLink.ID = App.EmployeeID;
                    item.ManagerLink.ID = App.EmployeeID;
                }
            }
        }

        return result;
    }
}

public class KanbanGrid : BaseKanbanGrid, IDefaultGrid
{
    private TaskPanelProperties _properties;
    protected override TaskPanelProperties Properties => _properties;

    public KanbanGrid()
    {
        _properties = new GlobalConfiguration<TaskPanelProperties>().Load();
    }
}