/*
 * Copyright(c) 2019 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
using System;
using System.Collections.Generic;
using Tizen.NUI.BaseComponents;
using System.ComponentModel;

namespace Tizen.NUI.Components
{
    /// <summary>
    /// Popup is one kind of common component, it can be used as popup window.
    /// User can handle Popup button count, head title and content area.
    /// </summary>
    /// <since_tizen> 6 </since_tizen>
    public class Popup : Control
    {
        private ImageView backgroundImage;
        private ImageView shadowImage;
        private TextLabel titleText;
        private List<Button> buttonList;
        private List<string> buttonTextList = new List<string>();

        private PopupAttributes popupAttributes;
        private int buttonCount = 0;

        /// <summary>
        /// Creates a new instance of a Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public Popup() : base()
        {
            Initialize();
        }

        /// <summary>
        /// Creates a new instance of a Popup with style.
        /// </summary>
        /// <param name="style">Create Popup by special style defined in UX.</param>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Popup(string style) : base(style)
        {
            Initialize();
        }

        /// <summary>
        /// Creates a new instance of a Popup with attributes.
        /// </summary>
        /// <param name="attributes">Create Popup by attributes customized by user.</param>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Popup(PopupAttributes attributes) : base(attributes)
        {
            Initialize();
        }

        /// <summary>
        /// An event for the button clicked signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public event EventHandler<ButtonClickEventArgs> PopupButtonClickEvent;

        /// <summary>
        /// Title text string in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public string TitleText
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.Text?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateTitleTextAttributes();
                    if (popupAttributes.TitleTextAttributes.Text == null)
                    {
                        popupAttributes.TitleTextAttributes.Text = new StringSelector();
                    }
                    popupAttributes.TitleTextAttributes.Text.All = value;

                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Button count in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public int ButtonCount
        {
            get
            {
                return buttonCount;
            }
            set
            {
                if (buttonCount != value)
                {
                    buttonCount = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Content view in Popup, only can be gotten.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public View ContentView
        {
            get;
            private set;
        }

        /// <summary>
        /// Shadow image's resource url in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public string ShadowImageURL
        {
            get
            {
                return popupAttributes?.ShadowImageAttributes?.ResourceURL?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateShadowAttributes();
                    if (popupAttributes.ShadowImageAttributes.ResourceURL == null)
                    {
                        popupAttributes.ShadowImageAttributes.ResourceURL = new StringSelector();
                    }
                    popupAttributes.ShadowImageAttributes.ResourceURL.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Shadow image's border in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Rectangle ShadowImageBorder
        {
            get
            {
                return popupAttributes?.ShadowImageAttributes?.Border?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateShadowAttributes();
                    if (popupAttributes.ShadowImageAttributes.Border == null)
                    {
                        popupAttributes.ShadowImageAttributes.Border = new RectangleSelector();
                    }
                    popupAttributes.ShadowImageAttributes.Border.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Background image's resource url in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public string BackgroundImageURL
        {
            get
            {
                return popupAttributes?.BackgroundImageAttributes?.ResourceURL?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateBackgroundAttributes();
                    if (popupAttributes.BackgroundImageAttributes.ResourceURL == null)
                    {
                        popupAttributes.BackgroundImageAttributes.ResourceURL = new StringSelector();
                    }
                    popupAttributes.BackgroundImageAttributes.ResourceURL.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Background image's border in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Rectangle BackgroundImageBorder
        {
            get
            {
                return popupAttributes?.BackgroundImageAttributes?.Border?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateBackgroundAttributes();
                    if (popupAttributes.BackgroundImageAttributes.Border == null)
                    {
                        popupAttributes.BackgroundImageAttributes.Border = new RectangleSelector();
                    }
                    popupAttributes.BackgroundImageAttributes.Border.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Title text point size in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public float TitlePointSize
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.PointSize?.All ?? 0;
            }
            set
            {
                CreateTitleTextAttributes();
                if (popupAttributes.TitleTextAttributes.PointSize == null)
                {
                    popupAttributes.TitleTextAttributes.PointSize = new FloatSelector();
                }
                popupAttributes.TitleTextAttributes.PointSize.All = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Title text font family in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public string TitleFontFamily
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.FontFamily;
            }
            set
            {
                CreateTitleTextAttributes();
                popupAttributes.TitleTextAttributes.FontFamily = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Title text color in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public Color TitleTextColor
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.TextColor?.All;
            }
            set
            {
                CreateTitleTextAttributes();
                if (popupAttributes.TitleTextAttributes.TextColor == null)
                {
                    popupAttributes.TitleTextAttributes.TextColor = new ColorSelector();
                }
                popupAttributes.TitleTextAttributes.TextColor.All = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Title text horizontal alignment in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public HorizontalAlignment TitleTextHorizontalAlignment
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.HorizontalAlignment ?? HorizontalAlignment.Center;
            }
            set
            {
                CreateTitleTextAttributes();
                popupAttributes.TitleTextAttributes.HorizontalAlignment = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Title text's position in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public Position TitleTextPosition
        {
            get
            {
                return popupAttributes?.TitleTextAttributes?.Position ?? new Position(0, 0, 0);
            }
            set
            {
                CreateTitleTextAttributes();
                popupAttributes.TitleTextAttributes.Position = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Title text's height in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public int TitleHeight
        {
            get
            {
                return (int)(popupAttributes?.TitleTextAttributes?.Size?.Height ?? 0);
            }
            set
            {
                CreateTitleTextAttributes();
                popupAttributes.TitleTextAttributes.Size.Height = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Shadow offset in Popup, including left, right, up and bottom offset.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Vector4 ShadowOffset
        {
            get
            {
                return popupAttributes?.ShadowOffset;
            }
            set
            {
                if (value != null)
                {
                    if (popupAttributes.ShadowOffset == null)
                    {
                        popupAttributes.ShadowOffset = new Vector4(0, 0, 0, 0);
                    }
                    popupAttributes.ShadowOffset = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Button height in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public int ButtonHeight
        {
            get
            {
                return (int)(popupAttributes?.ButtonAttributes?.Size?.Height ?? 0);
            }
            set
            {
                CreateButtonAttributes();
                popupAttributes.ButtonAttributes.Size.Height = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Button text point size in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public float ButtonTextPointSize
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.TextAttributes?.PointSize?.All ?? 0;
            }
            set
            {
                CreateButtonAttributes();
                if (popupAttributes.ButtonAttributes.TextAttributes.PointSize == null)
                {
                    popupAttributes.ButtonAttributes.TextAttributes.PointSize = new FloatSelector();
                }
                popupAttributes.ButtonAttributes.TextAttributes.PointSize.All = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Button text font family in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public string ButtonFontFamily
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.TextAttributes?.FontFamily;
            }
            set
            {
                CreateButtonAttributes();
                popupAttributes.ButtonAttributes.TextAttributes.FontFamily = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Button text color in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public Color ButtonTextColor
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.TextAttributes?.TextColor?.All;
            }
            set
            {
                CreateButtonAttributes();
                if (popupAttributes.ButtonAttributes.TextAttributes.TextColor == null)
                {
                    popupAttributes.ButtonAttributes.TextAttributes.TextColor = new ColorSelector();
                }
                popupAttributes.ButtonAttributes.TextAttributes.TextColor.All = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Button overlay background color selector in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public ColorSelector ButtonOverLayBackgroundColorSelector
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.OverlayImageAttributes?.BackgroundColor;
            }
            set
            {
                if (value != null)
                {
                    CreateButtonAttributes();
                    popupAttributes.ButtonAttributes.OverlayImageAttributes.BackgroundColor = value.Clone() as ColorSelector;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Button text horizontal alignment in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public HorizontalAlignment ButtonTextAlignment
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.TextAttributes?.HorizontalAlignment ?? HorizontalAlignment.Center;
            }
            set
            {
                CreateButtonAttributes();
                popupAttributes.ButtonAttributes.TextAttributes.HorizontalAlignment = value;
                RelayoutRequest();
            }
        }

        /// <summary>
        /// Button background image's resource url in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public string ButtonBackgroundImageURL
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.BackgroundImageAttributes?.ResourceURL?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateButtonAttributes();
                    if (popupAttributes.ButtonAttributes.BackgroundImageAttributes.ResourceURL == null)
                    {
                        popupAttributes.ButtonAttributes.BackgroundImageAttributes.ResourceURL = new StringSelector();
                    }
                    popupAttributes.ButtonAttributes.BackgroundImageAttributes.ResourceURL.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Button background image's border in Popup.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public Rectangle ButtonBackgroundImageBorder
        {
            get
            {
                return popupAttributes?.ButtonAttributes?.BackgroundImageAttributes?.Border?.All;
            }
            set
            {
                if (value != null)
                {
                    CreateButtonAttributes();
                    if (popupAttributes.ButtonAttributes.BackgroundImageAttributes.Border == null)
                    {
                        popupAttributes.ButtonAttributes.BackgroundImageAttributes.Border = new RectangleSelector();
                    }
                    popupAttributes.ButtonAttributes.BackgroundImageAttributes.Border.All = value;
                    RelayoutRequest();
                }
            }
        }

        /// <summary>
        /// Set button text by index.
        /// </summary>
        /// <param name="index">Button index.</param>
        /// <param name="text">Button text string.</param>
        /// <since_tizen> 6 </since_tizen>
        public void SetButtonText(int index, string text)
        {
            if(index < 0 && index >= buttonCount)
            {
                return;
            }
            if(buttonTextList.Count < index + 1)
            {
                for (int i = buttonTextList.Count; i < index + 1; i++)
                {
                    buttonTextList.Add("");
                }
            }
            buttonTextList[index] = text;
            RelayoutRequest();
        }

        /// <summary>
        /// Dispose Popup and all children on it.
        /// </summary>
        /// <param name="type">Dispose type.</param>
        /// <since_tizen> 6 </since_tizen>
        protected override void Dispose(DisposeTypes type)
        {
            if (disposed)
            {
                return;
            }

            if (type == DisposeTypes.Explicit)
            {
                if (titleText != null)
                {
                    Remove(titleText);
                    titleText.Dispose();
                    titleText = null;
                }
                if (backgroundImage != null)
                {
                    Remove(backgroundImage);
                    backgroundImage.Dispose();
                    backgroundImage = null;
                }
                if (shadowImage != null)
                {
                    Remove(shadowImage);
                    shadowImage.Dispose();
                    shadowImage = null;
                }
                if (ContentView != null)
                {
                    Remove(ContentView);
                    ContentView.Dispose();
                    ContentView = null;
                }
                if (buttonList != null)
                {
                    foreach(Button btn in buttonList)
                    {
                        Remove(btn);
                        btn.Dispose();
                    }
                }
            }

            base.Dispose(type);
        }

        /// <summary>
        /// Focus gained callback.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public override void OnFocusGained()
        {
            base.OnFocusGained();
        }

        /// <summary>
        /// Focus lost callback.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        public override void OnFocusLost()
        {
            base.OnFocusLost();
        }

        /// <summary>
        /// Get Popup attribues.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        protected override Attributes GetAttributes()
        {
            return new PopupAttributes();
        }

        /// <summary>
        /// Update Popup by attributes.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        protected override void OnUpdate()
        {
            int w = 0;
            int h = 0;
            int titleX = 0;
            int titleY = 0;
            int titleH = 0;
            int buttonH = 0;

            if (popupAttributes.ShadowImageAttributes != null)
            {
                if (shadowImage == null)
                {
                    shadowImage = new ImageView();
                    Add(shadowImage);
                }
                ApplyAttributes(shadowImage, popupAttributes.ShadowImageAttributes);
                w = Size2D.Width;
                h = Size2D.Height;
                if (popupAttributes.ShadowOffset != null)
                {
                    w = (int)(Size2D.Width + popupAttributes.ShadowOffset.W + popupAttributes.ShadowOffset.X);
                    h = (int)(Size2D.Height + popupAttributes.ShadowOffset.Y + popupAttributes.ShadowOffset.Z);
                }

                shadowImage.Size2D = new Size2D(w, h);
            }

            if (popupAttributes.BackgroundImageAttributes != null)
            {
                if (backgroundImage == null)
                {
                    backgroundImage = new ImageView()
                    {
                        WidthResizePolicy = ResizePolicyType.FillToParent,
                        HeightResizePolicy = ResizePolicyType.FillToParent
                    };
                    Add(backgroundImage);
                }
                ApplyAttributes(backgroundImage, popupAttributes.BackgroundImageAttributes);
            }

            if (popupAttributes.TitleTextAttributes != null)
            {
                if (titleText == null)
                {
                    titleText = new TextLabel();
                    Add(titleText);
                }

                ApplyAttributes(titleText, popupAttributes.TitleTextAttributes);

                if (titleText.Text != null && titleText.Text != "")
                {
                    popupAttributes.TitleTextAttributes.Text = new StringSelector { All = titleText.Text };
                    w = (int)(Size2D.Width - titleText.PositionX * 2);

                    if (popupAttributes.TitleTextAttributes.Size != null)
                    {
                        titleH = (int)titleText.Size.Height;
                    }
                    titleText.Size2D = new Size2D(w, titleH);

                    if (popupAttributes.TitleTextAttributes.Position != null)
                    {
                        titleX = (int)popupAttributes.TitleTextAttributes.Position.X;
                        titleY = (int)popupAttributes.TitleTextAttributes.Position.Y;
                    }
                }
                else
                {
                    titleText.Size2D = new Size2D(0, 0);
                }

               
            }
            ContentView.RaiseToTop();

            UpdateButton(buttonCount);
           
            if (buttonList != null && popupAttributes.ButtonAttributes != null && popupAttributes.ButtonAttributes.Size != null)
            {
                buttonH = (int)popupAttributes.ButtonAttributes.Size.Height;
            }
            ContentView.Size2D = new Size2D(Size2D.Width - titleX * 2, Size2D.Height - titleY - titleH - buttonH);
            ContentView.Position2D = new Position2D(titleX, titleY + titleH);

            LayoutChild();
        }

        /// <summary>
        /// Layout child in Popup and it can be override by user.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        protected virtual void LayoutChild()
        {
            if (popupAttributes == null)
            {
                return;
            }

            if(titleText != null)
            {
                if(LayoutDirection == ViewLayoutDirectionType.RTL)
                {
                    if (popupAttributes.TitleTextAttributes != null)
                    {
                        popupAttributes.TitleTextAttributes.HorizontalAlignment = HorizontalAlignment.End;
                    }
                    titleText.HorizontalAlignment = HorizontalAlignment.End;
                }
                else if(LayoutDirection == ViewLayoutDirectionType.LTR)
                {
                    if (popupAttributes.TitleTextAttributes != null)
                    {
                        popupAttributes.TitleTextAttributes.HorizontalAlignment = HorizontalAlignment.Begin;
                    }
                    titleText.HorizontalAlignment = HorizontalAlignment.Begin;
                }
            }

            if(buttonList != null && buttonList.Count > 0)
            {
                int pos = 0;
                if (LayoutDirection == ViewLayoutDirectionType.RTL)
                {                   
                    for (int i = buttonList.Count - 1; i >= 0; i--)
                    {
                        buttonList[i].PositionX = pos;
                        pos += buttonList[i].Size2D.Width;
                    }
                }
                else
                {
                    for (int i = 0; i < buttonList.Count; i++)
                    {
                        buttonList[i].PositionX = pos;
                        pos += buttonList[i].Size2D.Width;
                    }
                }
            }
        }

        /// <summary>
        /// Theme change callback when theme is changed, this callback will be trigger.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
        [EditorBrowsable(EditorBrowsableState.Never)]
        protected override void OnThemeChangedEvent(object sender, StyleManager.ThemeChangeEventArgs e)
        {
            PopupAttributes tempAttributes = StyleManager.Instance.GetAttributes(style) as PopupAttributes;
            if (tempAttributes != null)
            {
                attributes = popupAttributes = tempAttributes;
                RelayoutRequest();
            }
        }

        private void Initialize()
        {
            popupAttributes = attributes as PopupAttributes;
            if (popupAttributes == null)
            {
                throw new Exception("Popup attribute parse error.");
            }

            ApplyAttributes(this, popupAttributes);
            LeaveRequired = true;

            ContentView = new View()
            {
                ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
                PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
                PositionUsesPivotPoint = true
            };
            Add(ContentView);
            ContentView.RaiseToTop();
        }

        private void CreateShadowAttributes()
        {
            if (popupAttributes.ShadowImageAttributes == null)
            {
                popupAttributes.ShadowImageAttributes = new ImageAttributes()
                {
                    PositionUsesPivotPoint = true,
                    ParentOrigin = Tizen.NUI.ParentOrigin.Center,
                    PivotPoint = Tizen.NUI.PivotPoint.Center,
                };
            }
        }

        private void CreateBackgroundAttributes()
        {
            if (popupAttributes.BackgroundImageAttributes == null)
            {
                popupAttributes.BackgroundImageAttributes = new ImageAttributes()
                {
                    PositionUsesPivotPoint = true,
                    ParentOrigin = Tizen.NUI.ParentOrigin.Center,
                    PivotPoint = Tizen.NUI.PivotPoint.Center, 
                    WidthResizePolicy = ResizePolicyType.FillToParent,
                    HeightResizePolicy = ResizePolicyType.FillToParent
                };
            }
        }

        private void CreateTitleTextAttributes()
        {
            if (popupAttributes.TitleTextAttributes == null)
            {
                popupAttributes.TitleTextAttributes = new TextAttributes()
                {
                    Size =  new Size(0, 0),
                    PositionUsesPivotPoint = true,
                    ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
                    PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
                    HorizontalAlignment = HorizontalAlignment.Begin,
                    VerticalAlignment = VerticalAlignment.Bottom
                };
            }
        }

        private void CreateButtonAttributes()
        {
            if (popupAttributes.ButtonAttributes == null)
            {
                popupAttributes.ButtonAttributes = new ButtonAttributes()
                {
                    Size =  new Size(0, 0),
                    PositionUsesPivotPoint = true,
                    ParentOrigin =  Tizen.NUI.ParentOrigin.BottomLeft,
                    PivotPoint = Tizen.NUI.PivotPoint.BottomLeft,
                    TextAttributes = new TextAttributes
                    {
                        PositionUsesPivotPoint = true,
                        ParentOrigin = Tizen.NUI.ParentOrigin.Center,
                        PivotPoint = Tizen.NUI.PivotPoint.Center,
                        HorizontalAlignment =  HorizontalAlignment.Center,
                        VerticalAlignment = VerticalAlignment.Center
                    },
                    BackgroundImageAttributes = new ImageAttributes
                    {
                        PositionUsesPivotPoint = true,
                        ParentOrigin =  Tizen.NUI.ParentOrigin.Center,
                        PivotPoint = Tizen.NUI.PivotPoint.Center,
                        WidthResizePolicy = ResizePolicyType.FillToParent,
                        HeightResizePolicy = ResizePolicyType.FillToParent,
                        Border = new RectangleSelector { All = new Rectangle(0, 0, 0, 0) },
                    },
                    OverlayImageAttributes = new ImageAttributes
                    {
                        PositionUsesPivotPoint = true,
                        ParentOrigin = Tizen.NUI.ParentOrigin.Center,
                        PivotPoint = Tizen.NUI.PivotPoint.Center,
                        WidthResizePolicy = ResizePolicyType.FillToParent,
                        HeightResizePolicy = ResizePolicyType.FillToParent,
                        Border = new RectangleSelector { All = new Rectangle(0, 0, 0, 0) },
                    },
                };
            }
        }

        private void UpdateButton(int count)
        {
            if(buttonList != null && buttonCount == buttonList.Count)
            {
                for (int i = 0; i < count; i++)
                {
                    buttonList[i].TextColor = popupAttributes.ButtonAttributes.TextAttributes.TextColor.All;
                }
                return;
            }
           
            if (buttonList != null)
            {
                foreach (Button btn in buttonList)
                {
                    btn.ClickEvent -= ButtonClickEvent;
                    this.Remove(btn);
                    btn.Dispose();
                }
                buttonList.Clear();
                buttonList = null;
            }
            if(count <= 0)
            {
                return;
            }
            int buttonWidth = Size2D.Width / count;
            int buttonHeight = (int)popupAttributes.ButtonAttributes.Size.Height;
            int pos = 0;
            buttonList = new List<Button>();
            for (int i = 0; i < count; i++)
            {
                Button btn = null;
                popupAttributes.ButtonAttributes.Size.Width = buttonWidth;
                btn = new Button(popupAttributes.ButtonAttributes);
                btn.Position2D = new Position2D(pos, 0);

                if (i >= buttonTextList.Count)
                {
                    buttonTextList.Add("");
                }
                btn.Text = buttonTextList[i];
                btn.ClickEvent += ButtonClickEvent;
                pos += buttonWidth;
                this.Add(btn);
                buttonList.Add(btn);
            }
        }

        private void ButtonClickEvent(object sender, Button.ClickEventArgs e)
        {
            if (PopupButtonClickEvent != null && buttonList != null)
            {
                Button button = sender as Button;
                for (int i = 0; i < buttonList.Count; i++)
                {
                    if(button == buttonList[i])
                    {
                        ButtonClickEventArgs args = new ButtonClickEventArgs();
                        args.ButtonIndex = i;
                        PopupButtonClickEvent(this, args);
                    }
                }
            }
        }

        /// <summary>
        /// ButtonClickEventArgs is a class to record button click event arguments which will sent to user.
        /// </summary>
        /// <since_tizen> 6 </since_tizen>
        public class ButtonClickEventArgs : EventArgs
        {
            /// <summary> Button index which is clicked in Popup </summary>
            /// <since_tizen> 6 </since_tizen>
            public int ButtonIndex;
        }
    }
}