using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Scripting;
using InABox.WPF;
using Microsoft.Win32;
using Org.BouncyCastle.Asn1.Mozilla;
using Syncfusion.Windows.Shared;
using UnderlineType = InABox.Core.UnderlineType;

namespace InABox.DynamicGrid
{
    public abstract class DynamicFormLayoutGrid : DynamicOneToManyGrid<DigitalForm, DigitalFormLayout>
    {
        private readonly BitmapImage design = Wpf.Resources.design.AsBitmapImage();

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

            ActionColumns.Add(new DynamicImageColumn(DesignImage, DesignClick));
            //AddButton("Design", PRSDesktop.Resources.design.AsBitmapImage(), DesignClick);
            HiddenColumns.Add(x => x.Layout);

            AddButton("Auto Generate", null, AutoGenerate_Click);
            AddButton("Duplicate", null, Duplicate_Click);
        }

        protected override void DoReconfigure(FluentList<DynamicGridOption> options)
        {
            base.DoReconfigure(options);

            options.AddRange(DynamicGridOption.RecordCount, DynamicGridOption.ImportData);
        }

        private DFLayout LoadLayoutFromSpreadsheet(ISpreadsheet spreadsheet)
        {
            return DigitalFormUtils.LoadLayout(spreadsheet);
        }

        protected override void DoImport()
        {
            var dialog = new OpenFileDialog();
            dialog.Filter = "Excel Spreadsheet (.xlsx)|*.xlsx";
            if (dialog.ShowDialog() == true)
            {
                try
                {
                    DFLayout layout;
                    Dictionary<String, String> variablegroups = new Dictionary<string, string>();
                    using (var fs = new FileStream(dialog.FileName, FileMode.Open, FileAccess.Read, FileShare.Read))
                    {
                        layout = LoadLayoutFromSpreadsheet(new Spreadsheet(fs));
                    }

                    var dfLayout = CreateItem();
                    dfLayout.Code = Path.GetFileNameWithoutExtension(dialog.FileName).ToUpper();
                    dfLayout.Description = $"Imported From {Path.GetFileName(dialog.FileName)}";
                    dfLayout.Layout = layout.SaveLayout();
                    if(EditItems(new DigitalFormLayout[] { dfLayout }))
                    {
                        var newVariables = new List<DigitalFormVariable>();
                        String group = "";
                        foreach (var element in layout.Elements)
                        {
                            if (element is DFLayoutHeader header)
                            {
                                group = header.Header;
                            }
                            else if (element is DFLayoutField field)
                            {
                                var variable = new DigitalFormVariable();
                                variable.SetFieldType(field.GetType());
                                variable.SaveProperties(field.GetProperties());
                                variable.Group = group;
                                variable.Code = field.Name;
                                variable.Description = field.Name;
                                newVariables.Add(variable);
                            }
                        }
                        if(newVariables.Count > 0)
                        {
                            var variables = GetVariableGrid();
                            if (variables is not null)
                            {
                                var save = new List<DigitalFormVariable>();
                                foreach(var newVariable in newVariables)
                                {
                                    var variable = variables.GetVariable(newVariable.Code);
                                    if(variable is not null)
                                    {
                                        if(variable.FieldType() != newVariable.FieldType())
                                        {
                                            MessageBox.Show($"Variable [{newVariable.Code}] already exists with a different type!");
                                        }
                                    }
                                    else
                                    {
                                        save.Add(newVariable);
                                    }
                                }

                                variables.SaveItems(save.ToArray());
                                variables.Refresh(false, true);
                            }
                        }

                        Refresh(false, true);
                    }
                }
                catch(Exception e)
                {
                    Logger.Send(LogType.Error, "", CoreUtils.FormatException(e));
                    MessageBox.Show($"Error: {e.Message}");
                }
            }
        }

        private bool Duplicate_Click(Button btn, CoreRow[] rows)
        {
            if (!rows.Any()) return false;

            SaveItems(rows.Select(x =>
            {
                var layout = x.ToObject<DigitalFormLayout>();
                layout.ID = Guid.Empty;
                return layout;
            }).ToArray());
            return true;
        }

        private bool AutoGenerate_Click(Button btn, CoreRow[] rows)
        {
            var menu = new ContextMenu();

            menu.AddItem("Desktop Layout", null, AddDesktop_Click);
            menu.AddItem("Mobile Layout", null, AddMobile_Click);

            menu.IsOpen = true;

            return false;
        }

        private BitmapImage? DesignImage(CoreRow? row)
        {
            return row != null ? design : null;
        }

        private void AddMobile_Click()
        {
            var item = CreateItem();

            item.Layout = DFLayout.GenerateAutoMobileLayout(GetVariables()).SaveLayout();
            item.Type = DFLayoutType.Mobile;

            if (EditItems(new[] { item }))
            {
                SaveItem(item);
                Refresh(false, true);
                DoChanged();
            }
        }

        private void AddDesktop_Click()
        {
            var item = CreateItem();

            item.Layout = DFLayout.GenerateAutoDesktopLayout(GetVariables()).SaveLayout();
            item.Type = DFLayoutType.Desktop;

            if (EditItems(new[] { item }))
            {
                SaveItem(item);
                Refresh(false, true);
                DoChanged();
            }
        }

        private DynamicVariableGrid? GetVariableGrid()
            => EditorGrid.Pages?.FirstOrDefault(x => x is DynamicVariableGrid)
                as DynamicVariableGrid;

        private List<DigitalFormVariable> GetVariables()
            => GetVariableGrid()?.Items.ToList() ?? new List<DigitalFormVariable>();

        private void Design(DigitalFormLayout layout)
        {
            var variables = GetVariables();

            var newVariables = new List<DigitalFormVariable>();

            var form = new DynamicFormDesignWindow
            {
                Type = layout.Type
            };
            form.OnCreateVariable += (fieldType) =>
            {
                if (DynamicVariableUtils.CreateAndEdit(Item, GetVariables(), fieldType, out var variable))
                {
                    newVariables.Add(variable);
                    return variable;
                }
                return null;
            };
            /*form.OnEditVariable += (variable) =>
            {
                var properties = variable.CreateProperties();
                if (DynamicVariableUtils.EditProperties(Item, GetVariables(), properties.GetType(), properties))
                {
                    variable.SaveProperties(properties);
                    return true;
                }
                return false;
            };*/
            form.LoadLayout(layout, variables);
            form.Initialize();

            if (form.ShowDialog() == true)
            {
                layout.Layout = form.SaveLayout();
                SaveItem(layout);

                var grid = GetVariableGrid();
                if (grid is not null)
                {
                    grid.SaveItems(newVariables.ToArray());
                    grid.Refresh(false, true);
                }
            }
        }

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

            Design(LoadItem(row));

            return false;
        }


        //public override void SaveItem(DigitalFormLayout item)
        //{
        //    bool bActive = item.Active;
        //    foreach (var other in Items.Where(x=>(x != item) && (x.Type == item.Type)))
        //    {
        //        if (item.Active)
        //        {
        //            if (other.Active)
        //                other.Active = false;
        //        }
        //        else
        //            bActive = bActive || other.Active;
        //    }
        //    if (!bActive)
        //        item.Active = true;
        //    base.SaveItem(item);
        //}

        protected override void DoDoubleClick(object sender)
        {
            DesignClick(SelectedRows.FirstOrDefault());
        }
    }
}