using System;
using System.Linq.Expressions;
using Microsoft.SqlServer.Server;
using Syncfusion.SfDataGrid.XForms;
using Xamarin.Forms;

namespace comal.timesheets
{
    
    public abstract class MobileGridColumn<TEntity, TType> : IMobileGridColumn
    {
        
        public MobileGridColumn()
        {
            Alignment = TextAlignment.Center;
            Width = GridLength.Star;
        }
        

        public Expression<Func<TEntity,TType>> Column { get; set; }

        // This should come from CoreUtils
        public String ColumnName => Column?.ToString().Replace(" ","").Replace("x=>x.","") ?? "";
        
        public GridLength Width { get; set; }
        
        public String Caption { get; set; }
        
        public TextAlignment Alignment { get; set; }
        
        public Action<IMobileGridColumn, object> Tapped { get; set; }
        
        public abstract GridColumn CreateColumn();
        
        public TColumn CreateColumn<TColumn>() where TColumn : GridColumn, new()
        {
            var result = new TColumn();
            
            result.MappingName = ColumnName;
            
            if (Width.IsStar)
                result.ColumnSizer = ColumnSizer.Star;
            else if (Width.IsAuto)
                result.ColumnSizer = ColumnSizer.Auto;
            else
            {
                result.ColumnSizer = ColumnSizer.None;
                result.Width = Width.Value;
            }

            result.TextAlignment = Alignment;
            
            result.HeaderTextAlignment = Alignment;
            result.HeaderText = Caption;

            return result;

        }
        
    }
}