using System.Diagnostics.CodeAnalysis;
using System.Windows.Input;
using Connected.Annotations;
using Connected.Utilities;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;

namespace Connected.Components;

// note: the MudTable code is split. Everything that has nothing to do with the type parameter of MudTable<T> is here in MudTableBase

public abstract class TableBase : UIComponent
{
   internal object _editingItem = null;
   internal bool IsEditing => _editingItem != null;

   private int _currentPage = 0;
   private int? _rowsPerPage;
   private bool _isFirstRendered = false;

   protected string Classname =>
   new CssBuilder("mud-table")
      .AddClass("mud-xs-table", Breakpoint == Breakpoint.Xs)
      .AddClass("mud-sm-table", Breakpoint == Breakpoint.Sm)
      .AddClass("mud-md-table", Breakpoint == Breakpoint.Md)
      .AddClass("mud-lg-table", Breakpoint is Breakpoint.Lg or Breakpoint.Always)
      .AddClass("mud-xl-table", Breakpoint is Breakpoint.Xl or Breakpoint.Always)
      .AddClass("mud-xxl-table", Breakpoint is Breakpoint.Xxl or Breakpoint.Always)
      .AddClass("mud-table-dense", Dense)
      .AddClass("mud-table-hover", Hover)
      .AddClass("mud-table-bordered", Bordered)
      .AddClass("mud-table-striped", Striped)
      .AddClass("mud-table-outlined", Outlined)
      .AddClass("mud-table-square", Square)
      .AddClass("mud-table-sticky-header", FixedHeader)
      .AddClass("mud-table-sticky-footer", FixedFooter)
      .AddClass($"mud-elevation-{Elevation}", !Outlined)
     .AddClass(Class)
   .Build();

   protected string HeadClassname => new CssBuilder("mud-table-head")
      .AddClass(HeaderClass).Build();
   protected string FootClassname => new CssBuilder("mud-table-foot")
      .AddClass(FooterClass).Build();

   /// <summary>
   /// When editing a row and this is true, the editing row must be saved/cancelled before a new row will be selected.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public bool IsEditRowSwitchingBlocked { get; set; } = false;

   /// <summary>
   /// The higher the number, the heavier the drop-shadow. 0 for no shadow.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public int Elevation { set; get; } = 1;

   /// <summary>
   /// Set true to disable rounded corners
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Square { get; set; }

   /// <summary>
   /// If true, table will be outlined.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Outlined { get; set; }

   /// <summary>
   /// If true, table's cells will have left/right borders.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Bordered { get; set; }

   /// <summary>
   /// Set true for rows with a narrow height
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Dense { get; set; }

   /// <summary>
   /// Set true to see rows hover on mouse-over.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Hover { get; set; }

   /// <summary>
   /// If true, striped table rows will be used.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public bool Striped { get; set; }

   /// <summary>
   /// At what breakpoint the table should switch to mobile layout. Takes None, Xs, Sm, Md, Lg and Xl the default behavior is breaking on Xs.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Behavior)]
   public Breakpoint Breakpoint { get; set; } = Breakpoint.Xs;

   /// <summary>
   /// When true, the header will stay in place when the table is scrolled. Note: set Height to make the table scrollable.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Header)]
   public bool FixedHeader { get; set; }

   /// <summary>
   /// When true, the footer will be visible is not scrolled to the bottom. Note: set Height to make the table scrollable.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Footer)]
   public bool FixedFooter { get; set; }

   /// <summary>
   /// Setting a height will allow to scroll the table. If not set, it will try to grow in height. You can set this to any CSS value that the
   /// attribute 'height' accepts, i.e. 500px. 
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Appearance)]
   public string Height { get; set; }

   /// <summary>
   /// If table is in smalldevice mode and uses any kind of sorting the text applied here will be the sort selects label.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Sorting)]
   public string SortLabel { get; set; }

   /// <summary>
   /// If true allows table to be in an unsorted state through column clicks (i.e. first click sorts "Ascending", second "Descending", third "None").
   /// If false only "Ascending" and "Descending" states are allowed (i.e. there always should be a column to sort).
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Sorting)]
   public bool AllowUnsorted { get; set; } = true;

   /// <summary>
   /// If the table has more items than this number, it will break the rows into pages of said size.
   /// Note: requires a MudTablePager in PagerContent.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Pagination)]
   public int RowsPerPage
   {
      get => _rowsPerPage ?? 10;
      set
      {
         if (_rowsPerPage is null || _rowsPerPage != value)
            SetRowsPerPage(value);
      }
   }

   /// <summary>
   /// Rows Per Page two-way bindable parameter
   /// </summary>
   [Parameter] public EventCallback<int> RowsPerPageChanged { get; set; }

   /// <summary>
   /// The page index of the currently displayed page (Zero based). Usually called by MudTablePager.
   /// Note: requires a MudTablePager in PagerContent.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Pagination)]
   public int CurrentPage
   {
      get => _currentPage;
      set
      {
         if (_currentPage == value)
            return;
         _currentPage = value;
         InvokeAsync(StateHasChanged);
         if (_isFirstRendered)
            InvokeServerLoadFunc();
      }
   }

   /// <summary>
   /// Set to true to enable selection of multiple rows with check boxes. 
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Selecting)]
   public bool MultiSelection { get; set; }

   /// <summary>
   /// Optional. Add any kind of toolbar to this render fragment.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Behavior)]
   public RenderFragment ToolBarContent { get; set; }

   /// <summary>
   /// Show a loading animation, if true.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Data)]
   public bool Loading { get; set; }

   /// <summary>
   /// The color of the loading progress if used. It supports the theme colors.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Data)]
   public ThemeColor LoadingProgressColor { get; set; } = ThemeColor.Info;

   /// <summary>
   /// Add MudTh cells here to define the table header. If <see cref="CustomHeader"/> is set, add one or more MudTHeadRow instead.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Header)]
   public RenderFragment HeaderContent { get; set; }

   /// <summary>
   /// Specify if the header has multiple rows. In that case, you need to provide the MudTHeadRow tags.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Header)]
   public bool CustomHeader { get; set; }

   /// <summary>
   /// Add a class to the thead tag
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Header)]
   public string HeaderClass { get; set; }

   /// <summary>
   /// Add MudTd cells here to define the table footer. If<see cref="CustomFooter"/> is set, add one or more MudTFootRow instead.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Footer)]
   public RenderFragment FooterContent { get; set; }

   /// <summary>
   /// Specify if the footer has multiple rows. In that case, you need to provide the MudTFootRow tags.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Footer)]
   public bool CustomFooter { get; set; }

   /// <summary>
   /// Add a class to the tfoot tag
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Footer)]
   public string FooterClass { get; set; }

   /// <summary>
   /// Specifies a group of one or more columns in a table for formatting.
   /// Ex:
   /// table
   ///     colgroup
   ///        col span="2" style="background-color:red"
   ///        col style="background-color:yellow"
   ///      colgroup
   ///      header
   ///      body
   /// table
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Behavior)]
   public RenderFragment ColGroup { get; set; }

   //[Parameter] public RenderFragment<T> RowTemplate { get; set; } <-- see MudTable.razor

   /// <summary>
   /// Add MudTablePager here to enable breaking the rows in to multiple pages.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Pagination)]
   public RenderFragment PagerContent { get; set; }


   /// <summary>
   /// Locks Inline Edit mode, if true.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public bool ReadOnly { get; set; } = false;

   /// <summary>
   /// Button commit edit click event.
   /// </summary>
   [Parameter] public EventCallback<MouseEventArgs> OnCommitEditClick { get; set; }

   /// <summary>
   /// Button cancel edit click event.
   /// </summary>
   [Parameter] public EventCallback<MouseEventArgs> OnCancelEditClick { get; set; }

   /// <summary>
   /// Event is called before the item is modified in inline editing.
   /// </summary>
   [Parameter] public EventCallback<object> OnPreviewEditClick { get; set; }

   /// <summary>
   /// Command executed when the user clicks on the CommitEdit Button.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public ICommand CommitEditCommand { get; set; }

   /// <summary>
   /// Command parameter for the CommitEdit Button. By default, will be the row level item model, if you won't set anything else.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public object CommitEditCommandParameter { get; set; }

   /// <summary>
   /// Tooltip for the CommitEdit Button.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public string CommitEditTooltip { get; set; }

   /// <summary>
   /// Tooltip for the CancelEdit Button.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public string CancelEditTooltip { get; set; }

   /// <summary>
   /// Sets the Icon of the CommitEdit Button.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public string CommitEditIcon { get; set; } = Icons.Material.Filled.Done;

   /// <summary>
   /// Sets the Icon of the CancelEdit Button.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public string CancelEditIcon { get; set; } = Icons.Material.Filled.Cancel;

   /// <summary>
   /// Define if Cancel button is present or not for inline editing.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public bool CanCancelEdit { get; set; }

   /// <summary>
   /// Set the positon of the CommitEdit and CancelEdit button, if <see cref="IsEditable"/> IsEditable is true. Defaults to the end of the row
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public TableApplyButtonPosition ApplyButtonPosition { get; set; } = TableApplyButtonPosition.End;

   /// <summary>
   /// Set the positon of the StartEdit button, if <see cref="IsEditable"/> IsEditable is true. Defaults to the end of the row
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public TableEditButtonPosition EditButtonPosition { get; set; } = TableEditButtonPosition.End;

   /// <summary>
   /// Defines how a table row edit will be triggered
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public TableEditTrigger EditTrigger { get; set; } = TableEditTrigger.RowClick;

   /// <summary>
   /// Defines the edit button that will be rendered when EditTrigger.EditButton
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public RenderFragment<EditButtonContext> EditButtonContent { get; set; }

   /// <summary>
   /// The method is called before the item is modified in inline editing.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public Action<object> RowEditPreview { get; set; }

   /// <summary>
   /// The method is called when the edition of the item has been committed in inline editing.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public Action<object> RowEditCommit { get; set; }

   /// <summary>
   /// The method is called when the edition of the item has been canceled in inline editing.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Editing)]
   public Action<object> RowEditCancel { get; set; }

   /// <summary>
   /// Number of items. Used only with ServerData="true"
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Data)]
   public int TotalItems { get; set; }

   /// <summary>
   /// CSS class for the table rows. Note, many CSS settings are overridden by MudTd though
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Rows)]
   public string RowClass { get; set; }

   /// <summary>
   /// CSS styles for the table rows. Note, many CSS settings are overridden by MudTd though
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Rows)]
   public string RowStyle { get; set; }

   /// <summary>
   /// If true, the results are displayed in a Virtualize component, allowing a boost in rendering speed.
   /// </summary>
   [Parameter]
   [Category(CategoryTypes.Table.Behavior)]
   public bool Virtualize { get; set; }

   #region --> Obsolete Forwarders for Backwards-Compatiblilty
   /// <summary>
   /// Alignment of the table cell text when breakpoint is smaller than <see cref="Breakpoint" />
   /// </summary>
   [ExcludeFromCodeCoverage]
   [Obsolete("This property is not needed anymore, the cells width/alignment is done automatically.", true)]
   [Parameter] public bool RightAlignSmall { get; set; } = true;
   #endregion

   public abstract TableContext TableContext { get; }

   protected override Task OnAfterRenderAsync(bool firstRender)
   {
      if (firstRender)
         _isFirstRendered = true;

      return base.OnAfterRenderAsync(firstRender);
   }

   public void NavigateTo(Page page)
   {
      switch (page)
      {
         case Page.First:
            CurrentPage = 0;
            break;
         case Page.Last:
            CurrentPage = Math.Max(0, NumPages - 1);
            break;
         case Page.Next:
            CurrentPage = Math.Min(NumPages - 1, CurrentPage + 1);
            break;
         case Page.Previous:
            CurrentPage = Math.Max(0, CurrentPage - 1);
            break;
      }
   }
   /// <summary>
   /// Navigate to page with specified index.
   /// </summary>
   /// <param name="pageIndex"> The index of the page number.</param>
   public void NavigateTo(int pageIndex)
   {
      CurrentPage = Math.Min(Math.Max(0, pageIndex), NumPages - 1);
   }

   public void SetRowsPerPage(int size)
   {
      if (_rowsPerPage == size)
         return;
      _rowsPerPage = size;
      CurrentPage = 0;
      StateHasChanged();
      RowsPerPageChanged.InvokeAsync(_rowsPerPage.Value);
      if (_isFirstRendered)
         InvokeServerLoadFunc();
   }

   protected abstract int NumPages { get; }

   public abstract int GetFilteredItemsCount();

   public abstract void SetSelectedItem(object item);

   public abstract void SetEditingItem(object item);

   internal async Task OnCommitEditHandler(MouseEventArgs ev, object item)
   {
      await OnCommitEditClick.InvokeAsync(ev);
      if (CommitEditCommand?.CanExecute(CommitEditCommandParameter) ?? false)
      {
         var parameter = CommitEditCommandParameter;
         if (parameter == null)
            parameter = item;
         CommitEditCommand.Execute(parameter);
      }
   }

   internal Task OnPreviewEditHandler(object item)
   {
      return OnPreviewEditClick.InvokeAsync(item);
   }

   internal Task OnCancelEditHandler(MouseEventArgs ev)
   {
      return OnCancelEditClick.InvokeAsync(ev);
   }

   protected string TableStyle
      => new StyleBuilder()
         .AddStyle($"height", Height, !string.IsNullOrWhiteSpace(Height))
         .Build();

   internal abstract bool HasServerData { get; }

   internal abstract Task InvokeServerLoadFunc();

   internal abstract void FireRowClickEvent(MouseEventArgs args, Tr tr, object item);

   internal abstract void OnHeaderCheckboxClicked(bool value);

   internal abstract bool IsEditable { get; }

   public abstract bool ContainsItem(object item);
   public abstract void UpdateSelection();

   public IForm Validator { get; set; } = new TableRowValidator();
}