using Comal.Classes;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using Syncfusion.Data;
using Syncfusion.UI.Xaml.Grid;
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;

namespace PRSDesktop.Panels.Jobs.Summary;

public class JobRequisitionItemSummaryGrid : DynamicDataGrid<JobRequisitionItem>, ISpecificGrid
{
    public int DueDateAlert { get; set; }
    public int DueDateWarning { get; set; }

    protected override bool ShowSequenceButtons => false;

    private class UIComponent : DynamicGridGridUIComponent<JobRequisitionItem>
    {
        private JobRequisitionItemSummaryGrid Grid;

        public UIComponent(JobRequisitionItemSummaryGrid grid)
        {
            Grid = grid;
            Parent = grid;
        }

        protected override Brush? GetCellBackground(CoreRow row, DynamicColumnBase column)
        {
            if (column is DynamicGridColumn col)
            {
                if (String.Equals(col.ColumnName,
                        CoreUtils.GetFullPropertyName<JobRequisitionItem, DateTime>(x => x.Requisition.DueDate, ".")))
                {
                    var due = row.Get<JobRequisitionItem, DateTime>(x => x.Requisition.DueDate);
                    if (!due.IsEmpty())
                    {
                        var background = DateTime.Today > due.Date
                            ? Colors.LightSalmon
                            : DateTime.Today.AddDays(Grid.DueDateWarning) >= due.Date
                                ? Colors.Orange
                                : DateTime.Today.AddDays(Grid.DueDateAlert) >= due.Date
                                    ? Colors.LightYellow
                                    : Colors.LightGreen;
                        return new SolidColorBrush(background) { Opacity = 0.5 };
                    }
                }
            }
            else if(column is DynamicActionColumn dac)
            {
                if (dac == Grid.InStockColumn
                    || dac == Grid.OnOrderColumn)
                {
                    return Colors.LightBlue.ToBrush(0.5);
                }
                else if (dac == Grid.TreatmentRequiredColumn
                    || dac == Grid.TreatmentOnOrderColumn)
                {
                    return Colors.Plum.ToBrush(0.5);
                }
            }

            var qty = row.Get<JobRequisitionItem, double>(x => x.Qty);
            if(row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                return Colors.Silver.ToBrush(0.5);
            }
            else if(row.Get<JobRequisitionItem, double>(x => x.Allocated) + row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                return Colors.LightGreen.ToBrush(0.5);
            }
            else if(row.Get<JobRequisitionItem, double>(x => x.InStock) + row.Get<JobRequisitionItem, double>(x => x.Issued) >= qty)
            {
                return Colors.Orange.ToBrush(0.5);
            }
            else
            {
                return Colors.LightSalmon.ToBrush(0.5);
            }
        }
    }

    private DynamicActionColumn InStockColumn;
    private DynamicActionColumn OnOrderColumn;
    private DynamicActionColumn TreatmentRequiredColumn;
    private DynamicActionColumn TreatmentOnOrderColumn;
    private DynamicActionColumn AllocatedColumn;
    private DynamicActionColumn IssuedColumn;

    public JobRequisitionItemSummaryGrid()
    {
        HiddenColumns.Add(x => x.Qty);
        HiddenColumns.Add(x => x.InStock);
        HiddenColumns.Add(x => x.OnOrder);
        HiddenColumns.Add(x => x.TreatmentOnOrder);
        HiddenColumns.Add(x => x.TreatmentRequired);
        HiddenColumns.Add(x => x.Allocated);
        HiddenColumns.Add(x => x.Issued);

        var qtyColumn = AddDoubleColumn(x => x.Qty, "Qty.");
        qtyColumn.GetSummary = () =>
        {
            return new GridSummaryColumn
            {
                Name = "Qty",
                Format = "{Sum:F2}",
                MappingName = "Qty",
                SummaryType = Syncfusion.Data.SummaryType.Custom,
                CustomAggregate = new QtyAggregate()
            };
        };

        InStockColumn = AddDoubleColumn(x => x.InStock, "Stk.");
        OnOrderColumn = AddDoubleColumn(x => x.OnOrder, "Ord.");
        TreatmentRequiredColumn = AddDoubleColumn(x => x.TreatmentRequired, "Req.");
        TreatmentOnOrderColumn = AddDoubleColumn(x => x.TreatmentOnOrder, "Ord.");
        AllocatedColumn = AddDoubleColumn(x => x.Allocated, "Stk.");
        IssuedColumn = AddDoubleColumn(x => x.Issued, "Iss.");

        ColumnsTag = "JobRequisitionReview";
    }

    private class QtyAggregate : ISummaryAggregate
    {
        public double Sum { get; private set; }

        public Action<IEnumerable, string, PropertyDescriptor> CalculateAggregateFunc()
        {
            return AggregateFunc;
        }

        private void AggregateFunc(IEnumerable items, string property, PropertyDescriptor args)
        {
            if (items is IEnumerable<DataRowView> rows)
            {
                Sum = 0;
                foreach (var dataRow in rows)
                {
                    Sum += (double)dataRow["Qty"];
                }
            }
            else
            {
                Logger.Send(LogType.Error, "", $"Attempting to calculate aggregate on invalid data type '{items.GetType()}'.");
            }
        }
    }

    private DynamicActionColumn AddDoubleColumn(Expression<Func<JobRequisitionItem, object>> property, string header)
    {
        var col = new DynamicTextColumn<JobRequisitionItem>(property) { Format = "F2", HeaderText = header, Width = 50 };
        ActionColumns.Add(col);
        return col;
    }

    protected override IDynamicGridUIComponent<JobRequisitionItem> CreateUIComponent()
    {
        return new UIComponent(this);
    }

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

        options.Clear();
        options.FilterRows = true;
        options.SelectColumns = true;
        options.RecordCount = true;
    }

    public override DynamicGridColumns GenerateColumns()
    {
        var columns = new DynamicGridColumns();
        columns.Add<JobRequisitionItem, DateTime>(x => x.Requisition.DueDate, 80, "Due", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem, string>(x => x.Requisition.Job.JobNumber, 70, "Job", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem, int>(x => x.Requisition.Number, 50, "Requi", "", Alignment.MiddleCenter);
        columns.Add<JobRequisitionItem, string>(x => x.Product.Code, 100, "Product Code", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Product.Name, 0, "Product Name", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Style.Code, 100, "Style", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, string>(x => x.Dimensions.UnitSize, 70, "Size", "", Alignment.MiddleLeft);
        columns.Add<JobRequisitionItem, JobRequisitionItemStatus>(x => x.Status, 90, "Status", "", Alignment.MiddleCenter);

        return columns;
    }

    protected override void ConfigureColumnGroups()
    {
        GetColumnGrouping()
            .AddGroup("Stock", InStockColumn, OnOrderColumn)
            .AddGroup("Treatment", TreatmentRequiredColumn, TreatmentOnOrderColumn)
            .AddGroup("Allocated", AllocatedColumn, IssuedColumn);
    }
}