using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Linq;
using System.Windows;
using System.Windows.Controls;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Wpf;
using InABox.WPF;

namespace PRSDesktop;

internal class JobRequisitionItemGrid : DynamicDataGrid<JobRequisitionItem>, IMasterDetailControl<JobRequisition, JobRequisitionItem>, ISpecificGrid
{
    public Job? Job { get; set; }

    private JobRequisition? _master;
    public JobRequisition? Master
    {
        get => _master;
        set
        {
            _master = value;
            CheckVisibility();
            Reconfigure();
        }
    }

    public Filter<JobRequisitionItem> MasterDetailFilter => Master != null
        ? Master.ID != Guid.Empty
            ? new Filter<JobRequisitionItem>(x => x.Requisition.ID).IsEqualTo(Master.ID)
            : new Filter<JobRequisitionItem>().None()
        : Job is not null && Job.ID != Guid.Empty
            ? new Filter<JobRequisitionItem>(x => x.Requisition.Job.ID).IsEqualTo(Job.ID)
            : new Filter<JobRequisitionItem>().None();

    private Button CancelItemsButton;

    public JobRequisitionItemGrid()
    {
        CancelItemsButton = AddButton("Cancel Items", PRSDesktop.Resources.disabled.AsBitmapImage(), CancelItems);
        CheckVisibility();
    }

    private void CheckVisibility()
    {
        CancelItemsButton.Visibility = Master is not null && Security.CanEdit<JobRequisition>() && Security.CanEdit<JobRequisitionItem>()
            ? System.Windows.Visibility.Visible
            : System.Windows.Visibility.Hidden;
    }

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

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

    private bool CancelItems(Button button, CoreRow[] rows)
    {
        if (Master is null) return false;

        if(rows.Length == 0)
        {
            MessageWindow.ShowMessage("Please select at least one item to cancel.", "Select items");
            return false;
        }

        // Reloading so I can ensure the correct columns without having to add hidden columns to JobRequisitionGrid.
        var oldRequi = Client.Query(
            new Filter<JobRequisition>(x => x.ID).IsEqualTo(Master?.ID ?? Guid.Empty),
            new Columns<JobRequisition>(x => x.Description)
					.Add(x => x.Number)
                .Add(x => x.DueDate))
            .ToObjects<JobRequisition>()
            .First();

        var oldRequiItems = Client.Query(
            new Filter<JobRequisitionItem>(x => x.ID).InList(rows.Select(x => x.Get<JobRequisitionItem, Guid>(x => x.ID)).ToArray()),
            new Columns<JobRequisitionItem>(x => x.Qty)
                .Add(x => x.Sequence)
                .Add(x => x.Job.ID)
                .Add(x => x.Product.ID)
                .Add(x => x.Product.Code)
                .Add(x => x.Style.ID)
                .Add(x => x.Style.Code)
                .Add(x => x.Style.Description)
                .Add(x => x.Dimensions.Unit.ID)
                .Add(x => x.Dimensions.Quantity)
                .Add(x => x.Dimensions.Length)
                .Add(x => x.Dimensions.Width)
                .Add(x => x.Dimensions.Height)
                .Add(x => x.Dimensions.Weight)
                .Add(x => x.Dimensions.UnitSize)
                .Add(x => x.Supplier.ID));

        var requisition = new JobRequisition
        {
            Description = $"Adjustment Requisition for Requisition {oldRequi.Number}",
            DueDate = oldRequi.DueDate
        };
        requisition.Job.ID = Master.Job.ID;
        requisition.Job.Synchronise(Master.Job);

        var requiItems = new List<JobRequisitionItem>();
        foreach(var oldItem in oldRequiItems.ToObjects<JobRequisitionItem>())
        {
            var newItem = new JobRequisitionItem
            {
                Notes = "Adjustment Requisition item",
                Qty = -oldItem.Qty,
                Sequence = oldItem.Sequence
            };
            newItem.Job.ID = requisition.Job.ID;
            newItem.Product.ID = oldItem.Product.ID;
            newItem.Style.ID = oldItem.Style.ID;
            newItem.Supplier.ID = oldItem.Supplier.ID;
            requiItems.Add(newItem);
        }

        var grid = DynamicGridUtils.CreateDynamicGrid(typeof(DynamicGrid<>), typeof(JobRequisition));
        if (grid.EditItems(new JobRequisition[] { requisition }, t =>
        {
            if (t == typeof(JobRequisitionItem))
            {
                var table = new CoreTable();

                table.LoadColumns(new Columns<JobRequisitionItem>().Default(
                    ColumnType.IncludeOptional,
                    ColumnType.IncludeEditable,
                    ColumnType.IncludeAggregates,
                    ColumnType.IncludeForeignKeys,
                    ColumnType.IncludeFormulae));
                table.LoadRows(requiItems);
                return table;
            }
            return null;
        }))
        {
            MessageWindow.ShowMessage($"Created requisition {requisition.Number}", "Created Requisition");
            return true;
        }
        else
        {
            return false;
        }
    }

    protected override void DoReconfigure(FluentList<DynamicGridOption> options)
    {
        base.DoReconfigure(options);
        options.AddRange(
            DynamicGridOption.RecordCount,
            DynamicGridOption.SelectColumns,
            DynamicGridOption.FilterRows,
            DynamicGridOption.MultiSelect
            );
        if(Master is not null)
        {
            options.Add(DynamicGridOption.AddRows);
        }
        else
        {
            options.Remove(DynamicGridOption.AddRows);
        }
    }
    

    protected override void Reload(Filters<JobRequisitionItem> criteria, Columns<JobRequisitionItem> columns,
        ref SortOrder<JobRequisitionItem>? sort,
        Action<CoreTable?, Exception?> action)
    {
        criteria.Add(MasterDetailFilter);
        base.Reload(criteria, columns, ref sort, action);
    }

    protected override bool CanCreateItems()
    {
        return base.CanCreateItems() && (Master?.ID ?? Guid.Empty) != Guid.Empty;
    }

    protected override JobRequisitionItem CreateItem()
    {
        var result = base.CreateItem();
        if(Master is not null)
        {
            result.Requisition.ID = Master.ID;
            result.Requisition.Synchronise(Master);
            result.Job.ID = Master.Job.ID;
            result.Job.Synchronise(Master.Job);
        }
        result.Qty = 1;
        return result;
    }
    
    protected override void OnAfterEditorValueChanged(DynamicEditorGrid? grid, JobRequisitionItem[] items, AfterEditorValueChangedArgs args, Dictionary<string, object?> changes)
    {
        base.OnAfterEditorValueChanged(grid, items, args, changes);
        if (args.ColumnName.Equals("Product.ID") || args.ColumnName.Equals("Dimensions") || args.ColumnName.StartsWith("Dimensions.") || args.ColumnName.Equals("Style.ID") || args.ColumnName.Equals("Supplier.ID"))
        {
            JobRequisitionItem.UpdateCosts(
                items, 
                changes
            );
        }
    }

    public override DynamicGridColumns GenerateColumns()
    {
        var columns = new DynamicGridColumns();
        columns.Add<JobRequisitionItem, DateTime>(x => x.Created, 80, "Date", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Requisition.Job.JobNumber, 70, "Job", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, int>(x => x.Requisition.Number, 50, "NO.", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Product.Code, 70, "Code", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Product.Name, 200, "Product Name", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Style.Description, 150, "Style", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, double>(x => x.Qty, 50, "Qty", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Dimensions.UnitSize, 50, "Size", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.PurchaseOrderNumbers, 80, "PO Numbers", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, JobRequisitionItemStatus>(x => x.Status, 80, "Status", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Notes, 300, "Notes", "", Alignment.MiddleLeft);

        columns.AddRange(base.GenerateColumns());
        return columns;
    }
}