using System;
using MvvmCross.Binding.iOS.Views;
using ILive.UIControls.iOS.Extensions.Anchors;
using UIKit;
using ILive.UIControls.iOS.Extensions;
using ILive.Core;
using ILive.UIControls.iOS;
using Foundation;
using CoreGraphics;
using ILive.Core.Primitives.Chat;

namespace ILive.iOS.ViewControllers.Chat
{
    public class MessageBubble : MvxTableViewCell
    {
        public static readonly nfloat TextLeftPadding = 15;
        public static readonly nfloat TextTopPadding = 10;
        public static readonly nfloat SidePadding = 20;
        public static readonly nfloat AvatarSize = 30;
        public static readonly nfloat ElementPadding = 10;
        public static readonly nfloat BubbleRadius = 5;
        public static readonly nfloat StampWidth = 50;

        public bool IsInitialized = false;

        public ChatMessage Source { get; set; }

        public string Message
        {
            get => TextLabel?.Text ?? string.Empty;
            set => TextLabel.Text = value;
        }

        public UIView Bubble { get; private set; }
        new public UITextView TextLabel { get; private set; }

        public UIView StampView { get; private set; }
        public UILabel DateStampView { get; private set; }
        public UILabel TimeStampView { get; private set; }
        public UIActivityIndicatorView Indicator { get; private set; }

        public UIImageView AvatarView { get; set; }

        public MessageBubble(ChatMessage item, bool isSelfBubble = false)
        {
            Source = item;

            CreateView();

            IsInitialized = isSelfBubble ? CompleteSelfUI() : CompleteOtherUI();
        }

        void CreateView()
        {
            Bubble = new UIView().AddTo(ContentView);
            TextLabel = new UITextView().AddTo(Bubble);

            Bubble.SetCornerRadius(BubbleRadius)
                  .JoinCenterY(ContentView);

            TextLabel.JoinTopOf(Bubble, TextTopPadding)
                     .JoinBottomOf(Bubble, TextTopPadding)
                     .JoinRightOf(Bubble, TextLeftPadding)
                     .JoinLeftOf(Bubble, TextLeftPadding)
                     .JoinHeight(0, AnchorType.GreaterThan);

            TextLabel.Set(v => v.TextContainerInset = UIEdgeInsets.Zero)
                     .Set(v => v.TextContainer.LineFragmentPadding = 0)
                     .Set(v => v.Font = UIFont.SystemFontOfSize(15, UIFontWeight.Regular))
                     .SetBackgroundColor(UIColor.Clear)
                     .Set(v => v.Text = Source.GetText());

            TextLabel.ScrollEnabled = false;
            TextLabel.Editable = false;

            StampView = new UIView().AddTo(ContentView);

            DateStampView = new UILabel().AddTo(StampView)
                                         .Set(v => v.Text = Source.TimeStamp.ToString(@"dd/MM/yy"))
                                         .Set(v => v.Font = UIFont.SystemFontOfSize(10, UIFontWeight.Light))
                                         .JoinTopOf(StampView)
                                         .JoinRightOf(StampView)
                                         .JoinLeftOf(StampView)
                                         .JoinWidth(StampWidth, AnchorType.GreaterThan)
                                         .JoinHeight(0, AnchorType.GreaterThan)
                                         .SetTextColor(Palette.TextLightGray);

            TimeStampView = new UILabel().AddTo(StampView)
                                         .Set(v => v.Text = Source.TimeStamp.ToString("HH:mm"))
                                         .Set(v => v.Font = UIFont.SystemFontOfSize(10, UIFontWeight.Light))
                                         .JoinBottomOf(DateStampView)
                                         .JoinBottomOf(StampView)
                                         .JoinRightOf(StampView)
                                         .JoinLeftOf(StampView)
                                         .JoinBottomOf(StampView)
                                         .JoinWidth(StampWidth, AnchorType.GreaterThan)
                                         .JoinHeight(0, AnchorType.GreaterThan)
                                         .SetTextColor(Palette.TextLightGray);

            if (Source.TimeStamp.Equals(default(DateTime)))
            {
                Indicator = new UIActivityIndicatorView(UIActivityIndicatorViewStyle.Gray).AddTo(StampView)
                                                                                          .JoinCenterX(StampView)
                                                                                          .JoinCenterY(StampView)
                                                                                          .JoinHeight(StampView)
                                                                                          .JoinWidthToHeight(StampView)
                                                                                          .Set(v => v.StartAnimating())
                                                                                          .Set(v => v.Layer.ZPosition = 1);
                TimeStampView.Hidden = true;
                DateStampView.Hidden = true;
            }
        }

        bool CompleteSelfUI()
        {
            Bubble.JoinRightOf(ContentView, SidePadding)
                  .SetBackgroundColor(Palette.LightGray);

            StampView.JoinLeftOf(ContentView, SidePadding, AnchorType.GreaterThan)
                     .JoinCenterY(Bubble)
                     .JoinLeftOf(Bubble, ElementPadding);

            DateStampView.SetAligment(UITextAlignment.Right);
            TimeStampView.SetAligment(UITextAlignment.Right);

            return true;
        }

        bool CompleteOtherUI()
        {
            AvatarView = new UIImageView().AddTo(ContentView)
                                          .JoinWidth(AvatarSize)
                                          .JoinHeight(AvatarSize)
                                          .JoinLeftOf(ContentView, SidePadding)
                                          .JoinAnchors(v => v.BottomAnchor, Bubble.BottomAnchor)
                                          .SetCornerRadius(AvatarSize / 2f)
                                          .SetBackgroundColor(UIColor.Brown)
                                          .Set(v => v.ClipsToBounds = true);

            Bubble.JoinRightOf(AvatarView, ElementPadding)
                  .SetBorder(1, Palette.LightGray.ToColor());

            StampView.JoinRightOf(ContentView, SidePadding, AnchorType.LessThan)
                     .JoinCenterY(Bubble)
                     .JoinRightOf(Bubble, ElementPadding);

            return true;
        }
    }
}