using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Scripting;
using InABox.Wpf.Reports;
using InABox.WPF;
using PRSDesktop.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace PRSDesktop;

public class DigitalFormDockGrid : DynamicGrid<DigitalFormDockModel>
{
    private static readonly CoreFieldMap<IDigitalFormInstance, DigitalFormDockModel> _mappings =
        new CoreFieldMap<IDigitalFormInstance, DigitalFormDockModel>()
            .Add(x => x.ID, x => x.ID)
            .Add(x => x.Form.ID, x => x.FormID)
            .Add(x => x.Number, x => x.Number)
            .Add(x => x.Description, x => x.FormName)
            .Add(x => x.FormCompleted, x => x.Completed)
            .Add(x => x.FormCompletedBy.UserID, x => x.CompletedBy)
            .Add(x => x.FormProcessed, x => x.Processed)
            .Add(x => x.Parent.ID, x => x.ParentID);

    public static readonly Dictionary<Type, System.Drawing.Bitmap> Images = new()
        {
            { typeof(AssignmentForm), PRSDesktop.Resources.assignments },
            { typeof(KanbanForm), PRSDesktop.Resources.kanban },
            { typeof(JobForm), PRSDesktop.Resources.project },
            { typeof(JobITPForm), PRSDesktop.Resources.checklist },
            { typeof(EmployeeForm), PRSDesktop.Resources.employees },
            { typeof(LeaveRequestForm), PRSDesktop.Resources.leave },
            { typeof(ManufacturingPacketStage), PRSDesktop.Resources.factory },
            { typeof(TimeSheetForm), PRSDesktop.Resources.time },
            { typeof(PurchaseOrderItemForm), PRSDesktop.Resources.purchase },
            { typeof(DeliveryForm), PRSDesktop.Resources.truck },
        };

    public List<Type> ExcludedTypes { get; private set; }

    public DateTime StartDate { get; set; }

    public DigitalFormDockGrid()
    {
        StartDate = DateTime.Today;
        ExcludedTypes = new List<Type>();

        ActionColumns.Add(new DynamicImageColumn(TypeImage)
        {
            Position = DynamicActionColumnPosition.Start,
            GetFilter = () => new StaticColumnFilter<Type>(
                FormType,
                Images.Keys.Select(x => new Tuple<string, Type>(x.EntityName().Split('.').Last().SplitCamelCase(), x)).ToArray())
        });

        ActionColumns.Add(new DynamicMenuColumn(MenuBuild, MenuStatus) { Position = DynamicActionColumnPosition.End });
    }

    protected override void DoReconfigure(DynamicGridOptions options)
    {
        options.Clear();
        options.FilterRows = true;
    }

    protected override DynamicGridStyle GetRowStyle(CoreRow row, DynamicGridStyle style)
    {
        var result = base.GetRowStyle(row, style);
        if (!row.Get<DigitalFormDockModel, DateTime>(x => x.Processed).IsEmpty())
            result = new DynamicGridRowStyle(result)
            {
                Background = new SolidColorBrush(Colors.LightGray),
            };
        return result;
    }

    private Type FormType(CoreRow row)
    {
        return row.Get<DigitalFormDockModel, Type>(x => x.FormType);
    }

    private BitmapImage? TypeImage(CoreRow? arg)
    {
        if (arg is null)
            return null;
        var type = arg.Get<DigitalFormDockModel, Type>(x => x.FormType);
        return Images.GetValueOrDefault(type)?.AsBitmapImage();
    }

    private static readonly MethodInfo MenuBuildGenericMethod = typeof(DigitalFormDockGrid)
        .GetMethod(nameof(MenuBuildGeneric), BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)!;
    private void MenuBuildGeneric<TEntityForm, TEntity, TEntityLink>(ContextMenu menu, DigitalFormDockModel formModel)
            where TEntityForm : Entity, IDigitalFormInstance<TEntityLink>, IRemotable, IPersistent, new()
            where TEntity : Entity, IRemotable, IPersistent, new()
            where TEntityLink : IEntityLink<TEntity>, new()
    {
        var filter = new Filter<TEntityForm>(x => x.ID).IsEqualTo(formModel.ID);
        var model = new DigitalFormReportDataModel<TEntityForm>(filter, formModel.FormID);

        if (Security.CanView<TEntity>())
        {
            menu.AddItem($"View {typeof(TEntity).Name}", Images.GetValueOrDefault(typeof(TEntityForm)), formModel, ViewEntity_Click<TEntity>);
        }

        var moduleTask = Task.Run(() =>
        {
            return new Client<CustomModule>().Query(
                new Filter<CustomModule>(x => x.DataModel).IsEqualTo(model.Name)
                    .And(x => x.Section).IsEqualTo(formModel.FormID.ToString())
                    .And(x => x.Visible).IsEqualTo(true)
                ).ToObjects<CustomModule>();
        });

        var modulesSeparator = menu.AddSeparatorIfNeeded();
        var modulesItem = menu.AddItem("Loading...", null, null, enabled: false);
        moduleTask.ContinueWith((task) =>
        {
            try
            {
                var index = menu.Items.IndexOf(modulesItem);
                menu.Items.Remove(modulesItem);
                var any = false;
                foreach (var module in task.Result)
                {
                    any = true;
                    menu.AddItem(
                        module.Name,
                        PRSDesktop.Resources.edit,
                        () =>
                        {
                            try
                            {
                                if (ScriptDocument.RunCustomModule(model, new Dictionary<string, object[]>(), module.Script))
                                {
                                    Refresh(false, true);
                                }
                            }
                            catch (CompileException c)
                            {
                                MessageBox.Show(c.Message);
                            }
                            catch (Exception e)
                            {
                                MessageBox.Show(CoreUtils.FormatException(e));
                            }
                        },
                        enabled: formModel.Processed.IsEmpty(),
                        index: index);
                    ++index;
                }
                if (!any && modulesSeparator is not null)
                {
                    menu.Items.Remove(modulesSeparator);
                }
            }
            catch (Exception ex)
            {
                Logger.Send(LogType.Error, ClientFactory.UserID, $"Error in digital form dock while loading custom modules: {CoreUtils.FormatException(ex)}");
                MessageBox.Show($"Error: {ex.Message}", "Error");
            }
        }, TaskScheduler.FromCurrentSynchronizationContext());

        menu.AddSeparator();

        if (formModel.Processed.IsEmpty())
        {
            menu.AddItem(
                "Mark as Processed",
                PRSDesktop.Resources.lock_sml,
                () =>
                {
                    var form = new TEntityForm
                    {
                        FormProcessed = formModel.Processed
                    }.SetID(formModel.ID);
                    form.CommitChanges();
                    form.FormProcessed = DateTime.Now;
                    using (new WaitCursor())
                    {
                        Client.Save(form, "Marked As Processed");
                        Refresh(false, true);
                    }
                });
        }
        else
        {
            menu.AddItem(
                "Clear Processed Flag",
                PRSDesktop.Resources.lock_sml,
                () =>
                {
                    var form = new TEntityForm
                    {
                        FormProcessed = formModel.Processed
                    }.SetID(formModel.ID);
                    form.CommitChanges();
                    form.FormProcessed = DateTime.MinValue;
                    using (new WaitCursor())
                    {
                        Client.Save(form, "Processed Flag Cleared");
                        Refresh(false, true);
                    }
                });
        }

        if (typeof(TEntity).HasInterface<IJobScopedItem>())
        {
            menu.AddSeparatorIfNeeded();
            menu.AddItem("Set Job", PRSDesktop.Resources.project, formModel,
                SetJob_ClickMethod.MakeGenericMethod(typeof(TEntity)).CreateDelegate<Action<DigitalFormDockModel>>());
            menu.AddItem("Set Job Scope", PRSDesktop.Resources.project, formModel,
                SetJobScope_ClickMethod.MakeGenericMethod(typeof(TEntity)).CreateDelegate<Action<DigitalFormDockModel>>());
        }
        else if (typeof(TEntity) == typeof(Job) && typeof(TEntityForm) == typeof(JobForm))
        {
            menu.AddSeparatorIfNeeded();
            var scopeheader = menu.AddItem("Set Job Scope", PRSDesktop.Resources.project, formModel, dockModel => { });

            var scopes = Client.Query<JobScope>(
                new Filter<JobScope>(x => x.Job.ID).IsEqualTo(formModel.ParentID),
                Columns.None<JobScope>()
                    .Add(x => x.ID)
                    .Add(x => x.Number)
                    .Add(x => x.Description)
            ).ToObjects<JobScope>();
            foreach (var scope in scopes)
            {
                var existingscope = new MenuItem() { Header = $"{scope.Number}: {scope.Description}", DataContext = formModel, Tag = scope };
                existingscope.Click += SetJobScopeFromMenu_Click;
                scopeheader.Items.Add(existingscope);
            }

            if (scopes.Any())
                scopeheader.Items.Add(new Separator());
            
            var newscope = new MenuItem() { Header = $"Create New Scope", DataContext = formModel };
            newscope.Click += CreateJobScopeFromMenu_Click;
            scopeheader.Items.Add(newscope);

        }

        if (Security.IsAllowed<CanCustomiseModules>())
        {
            menu.AddSeparatorIfNeeded();
            menu.AddItem("Customise Modules", PRSDesktop.Resources.script, () =>
            {
                var manager = new CustomModuleManager
                {
                    Section = formModel.FormID.ToString(),
                    DataModel = model
                };
                manager.ShowDialog();
            });
        }

        if (Security.IsAllowed<CanPrintReports>())
        {
            menu.AddSeparatorIfNeeded();
            var printItem = menu.AddItem("Print", PRSDesktop.Resources.printer, null);

            ReportUtils.PopulateMenu(printItem, formModel.FormID.ToString(), model, Security.IsAllowed<CanDesignReports>(), true);
        }
    }

    
    private static void UpdateScopeID(DigitalFormDockModel formModel, Guid scopeid)
    {
        var instance = Client.Query(
                new Filter<JobForm>(x => x.ID).IsEqualTo(formModel.ID),
                Columns.Required<JobForm>()
            ).ToObjects<JobForm>().First();
        
        instance.JobScope.ID = scopeid;
        Client.Save(instance, "Linked scope set by user from Digital forms dock.");

    }
    private void CreateJobScopeFromMenu_Click(object sender, RoutedEventArgs e)
    {
        if ((sender as MenuItem)?.DataContext is DigitalFormDockModel model)
        {
            var scope = new JobScope();
            scope.Job.ID = model.ParentID;
            scope.Description = model.FormName;
            if (new DynamicDataGrid<JobScope>().EditItems(new[] { scope }))
            {
                UpdateScopeID(model, scope.ID);
                MessageBox.Show($"Form has been assigned to scope {scope.Number}.");
                // Update the form scope here (from the SetScope) stuff
            }
        }
        
    }

    private void SetJobScopeFromMenu_Click(object sender, RoutedEventArgs e)
    {
        if (sender is MenuItem mi && mi.DataContext is DigitalFormDockModel model && mi.Tag is JobScope scope)
        {
            UpdateScopeID(model, scope.ID);
            MessageBox.Show($"Form has been assigned to scope {scope.Number}.");
            // Update the form scope here (from the SetScope) stuff
        }
    }

    private static void ViewEntity_Click<TEntity>(DigitalFormDockModel model)
        where TEntity : Entity, IRemotable, IPersistent, new()
    {
        var entity = Client.Query(
            new Filter<TEntity>(x => x.ID).IsEqualTo(model.ParentID),
            DynamicGridUtils.LoadEditorColumns<TEntity>(Columns.None<TEntity>()))
            .ToObjects<TEntity>().First();
        var grid = (DynamicGridUtils.CreateDynamicGrid(typeof(DynamicGrid<>), typeof(TEntity)) as DynamicGrid<TEntity>)!;
        grid.EditItems(new TEntity[] { entity });
    }

    private static void SetJobScopeFromJob_Click(DigitalFormDockModel formModel)
    {
        var instance = Client.Query(
            new Filter<JobForm>(x => x.ID).IsEqualTo(formModel.ID),
            LookupFactory.DefineLookupFilterColumns<JobForm, JobScope, JobScopeLink>(x => x.JobScope)
                .Add(x => x.ID)
                .Add(x => x.Parent.ID))
            .ToObjects<JobForm>().First();
        var job = Client.Query(
            new Filter<Job>(x => x.ID).IsEqualTo(instance.Parent.ID),
            LookupFactory.DefineChildFilterColumns<Job, JobScope>()).ToObjects<Job>().First();

        var window = new MultiSelectDialog<JobScope>(
            new Filters<JobScope>()
                .Add(LookupFactory.DefineChildFilter<Job, JobScope>(new Job[] { job }))
                .Add(new Filter<JobScope>(x => x.Job.ID).IsEqualTo(instance.Parent.ID))
                .Combine(),
            Columns.None<JobScope>().Add(x => x.ID).Add(x => x.Number), multiselect: false);
        if (!window.ShowDialog())
        {
            return;
        }
        var scope = window.Data().ToObjects<JobScope>().First();
        instance.JobScope.ID = scope.ID;

        Client.Save(instance, "Linked scope set by user from Digital forms dock.");
        MessageBox.Show($"Form has been assigned to scope {scope.Number}.");
    }


    private static readonly MethodInfo SetJobScope_ClickMethod = typeof(DigitalFormDockGrid).GetMethod(nameof(SetJobScope_Click), BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static)!;
    private static void SetJobScope_Click<TEntity>(DigitalFormDockModel formModel)
        where TEntity : Entity, IJobScopedItem, IRemotable, IPersistent, new()
    {
        var entity = Client.Query(
            new Filter<TEntity>(x => x.ID).IsEqualTo(formModel.ParentID),
            LookupFactory.DefineLookupFilterColumns<TEntity, JobScope, JobScopeLink>(x => x.JobScope)
                .Add(x => x.ID)
                .Add(x => x.JobLink.ID)
                .Add(x => x.JobScope.ID)
                .Add(x => x.JobScope.Number))
            .ToObjects<TEntity>().First();

        if (entity.JobLink.ID == Guid.Empty)
        {
            MessageBox.Show($"{typeof(TEntity).Name} is not linked to a job. Please select a job first.");
            return;
        }

        var window = new MultiSelectDialog<JobScope>(
            new Filters<JobScope>()
                .Add(LookupFactory.DefineLookupFilter<TEntity, JobScope, JobScopeLink>(x => x.JobScope, new TEntity[] { entity }))
                .Add(new Filter<JobScope>(x => x.Job.ID).IsEqualTo(entity.JobLink.ID))
                .Combine(),
            Columns.None<JobScope>().Add(x => x.ID).Add(x => x.Number),
            multiselect: false);
        if (!window.ShowDialog(nameof(JobScope.Number), entity.JobScope.Number, Syncfusion.Data.FilterType.Equals))
        {
            return;
        }
        var scope = window.Data().ToObjects<JobScope>().First();
        entity.JobScope.ID = scope.ID;

        Client.Save(entity, "Linked scope set by user from Digital forms dock.");
        MessageBox.Show($"{typeof(TEntity).Name} has been assigned to scope {scope.Number}.");
    }

    private static readonly MethodInfo SetJob_ClickMethod = typeof(DigitalFormDockGrid).GetMethod(nameof(SetJob_Click), BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static)!;
    private static void SetJob_Click<TEntity>(DigitalFormDockModel formModel)
        where TEntity: Entity, IJobScopedItem, IRemotable, IPersistent, new()
    {
        var entity = Client.Query(
            new Filter<TEntity>(x => x.ID).IsEqualTo(formModel.ParentID),
            LookupFactory.DefineLookupFilterColumns<TEntity, Job, JobLink>(x => x.JobLink)
                .Add(x => x.ID)
                .Add(x => x.JobLink.ID)
                .Add(x => x.JobLink.JobNumber))
            .ToObjects<TEntity>().First();

        var window = new MultiSelectDialog<Job>(
            LookupFactory.DefineLookupFilter<TEntity, Job, JobLink>(x => x.JobLink, new TEntity[] { entity }),
            Columns.None<Job>().Add(x => x.DefaultScope.ID).Add(x => x.JobNumber),
            multiselect: false);
        if (!window.ShowDialog(nameof(Job.JobNumber), entity.JobLink.JobNumber, Syncfusion.Data.FilterType.Equals))
        {
            return;
        }
        var job = window.Data().ToObjects<Job>().First();
        entity.JobLink.ID = job.ID;
        entity.JobLink.Synchronise(job);

        Client.Save(entity, "Linked job set by user from Digital forms dock.");
        MessageBox.Show($"{typeof(TEntity).Name} has been assigned to job {job.JobNumber}.");
    }

    private void MenuBuild(DynamicMenuColumn column, CoreRow? row)
    {
        if (row is null) return;

        var form = row.ToObject<DigitalFormDockModel>();
        var linkType = DFUtils.FormEntityLinkType(form.FormType);
        var entityType = DFUtils.FormEntityType(form.FormType);

        MenuBuildGenericMethod.MakeGenericMethod(form.FormType, entityType, linkType).Invoke(this, new object?[] { column.GetMenu(), form });
    }

    private DynamicMenuStatus MenuStatus(CoreRow row)
    {
        if (row == null) return DynamicMenuStatus.Hidden;
        return DynamicMenuStatus.Enabled;
    }

    protected override void Reload(
    	Filters<DigitalFormDockModel> criteria, Columns<DigitalFormDockModel> columns, ref SortOrder<DigitalFormDockModel>? sort,
    	CancellationToken token, Action<CoreTable?, Exception?> action)
    {
        var queryDefs = new Dictionary<string, IQueryDef>();

        var types = DFUtils.GetFormInstanceTypes().Except(ExcludedTypes).ToList();
        foreach (var type in types)
        {
            var filter = Filter.Create<IDigitalFormInstance>(type, x => x.FormCompleted).IsGreaterThanOrEqualTo(StartDate)
                .And<IDigitalFormInstance>(x => x.FormCancelled).IsEqualTo(DateTime.MinValue);

            var cols = Columns.Create<IDigitalFormInstance>(type, ColumnTypeFlags.None)
                .Add<IDigitalFormInstance>(c => c.ID)
                .Add<IDigitalFormInstance>(c => c.Parent.ID)
                .Add<IDigitalFormInstance>(c => c.Form.ID)
                .Add<IDigitalFormInstance>(c => c.Number)
                .Add<IDigitalFormInstance>(c => c.Description)
                .Add<IDigitalFormInstance>(c => c.FormCompleted)
                .Add<IDigitalFormInstance>(c => c.FormCompletedBy.UserID)
                .Add<IDigitalFormInstance>(c => c.FormProcessed);

            var sorts = SortOrder.Create<IDigitalFormInstance>(type, x => x.FormCompleted, SortDirection.Descending);

            queryDefs.Add(
                type.ToString(),
                new QueryDef(type)
                {
                    Filter = filter,
                    Columns = cols,
                    SortOrder = sorts
                });
        }

        Client.QueryMultiple(
            (results, e) =>
            {
                if(results is not null)
                {
                    var data = new CoreTable();
                    data.LoadColumns(typeof(DigitalFormDockModel));

                    foreach (var type in types)
                        data.LoadFrom(
                            results[type.ToString()],
                            _mappings,
                            (r) => r.Set<DigitalFormDockModel, Type>(x => x.FormType, type)
                        );
                    action.Invoke(data, null);
                }
                else if(e is not null)
                {
                    Logger.Send(LogType.Error, ClientFactory.UserID, CoreUtils.FormatException(e));
                    MessageBox.Show($"Error: {e.Message}");
                }
            },
            queryDefs);
    }

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

    public override void SaveItem(DigitalFormDockModel item)
    {
    }

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

    protected override void DoDoubleClick(object sender, DynamicGridCellClickEventArgs args)
    {
        base.DoDoubleClick(sender, args);

        var row = SelectedRows.FirstOrDefault();
        if (row is null)
            return;

        var instanceID = row.Get<DigitalFormDockModel, Guid>(x => x.ID);
        var formID = row.Get<DigitalFormDockModel, Guid>(x => x.FormID);
        var formType = row.Get<DigitalFormDockModel, Type>(x => x.FormType);

        var formInstance = Client.Create(formType)
            .Query(
                Filter.Create<IDigitalFormInstance>(formType, x => x.ID).IsEqualTo(instanceID),
                DynamicFormEditWindow.FormColumns(formType))
            .Rows.FirstOrDefault()
            ?.ToObject(formType) as IDigitalFormInstance;

        if (formInstance is null)
        {
            return;
        }
        if (formID == Guid.Empty)
        {
            var window = new DeletedFormWindow();
            window.FormData = formInstance?.FormData ?? "";
            window.ShowDialog();
            return;
        }
        if (DynamicFormEditWindow.EditDigitalForm(formInstance, out var model))
        {
            model.Update(null);
        }
    }

}