using System;
using System.IO;
using InABox.Core;
using Plugin.Media;
using Xamarin.Forms;
using XF.Material.Forms.UI.Dialogs;

namespace comal.timesheets
{
    class EmbeddedImageCapture : Grid
    {
        public Button CameraButton = new Button();
        public Button LibraryButton = new Button();
        public Label CameraLabel = new Label();
        public Label LibraryLabel = new Label();
        public Document Document;
        public Image Image { get; set; }
        bool firstLoad;
        bool disableLibrary;
        public EmbeddedImageCapture(bool disablelibrary = false)
        {
            VerticalOptions = LayoutOptions.Center;
            firstLoad = true;
            Document = new Document();
            Image = new Image();
            disableLibrary = disablelibrary;
            AddColumnsAndRows();
            AddButtons();
        }

        private void AddColumnsAndRows()
        {
            new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) };
            new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) };
            RowDefinition row = new RowDefinition() { Height = new GridLength(1, GridUnitType.Star) };
            RowDefinition row1 = new RowDefinition() { Height = new GridLength(5, GridUnitType.Star) };
            RowDefinition row2 = new RowDefinition() { Height = new GridLength(2, GridUnitType.Star) };
            RowDefinitions.Add(row);
            RowDefinitions.Add(row1);
            RowDefinitions.Add(row2);
        }

        private void AddButtons()
        {
            if (firstLoad)
            {
                CameraButton.Clicked += CameraButton_Clicked;
                CameraButton.ImageSource = "cameraicon.png";
                CameraButton.Margin = 5;
                CameraButton.Padding = 2;
                SetColumn(CameraButton, 0);
                SetRow(CameraButton, 1);
                CameraButton.BackgroundColor = Color.FromHex("#15C7C1");
                CameraButton.HeightRequest = 90;
                CameraButton.WidthRequest = 90;
                CameraButton.CornerRadius = 15;
                CameraButton.HorizontalOptions = LayoutOptions.Center;
                CameraButton.VerticalOptions = LayoutOptions.Center;
                //CameraButton.BorderWidth = 1;
                //CameraButton.BorderColor = Color.Orange;

                LibraryButton.Clicked += LibraryButton_Clicked;
                LibraryButton.ImageSource = "photolibraryicon.png";
                if (Device.RuntimePlatform.Equals(Device.iOS))
                { LibraryButton.ImageSource = "photo.png"; }
                LibraryButton.Margin = 5;
                LibraryButton.Padding = 2;
                SetRow(LibraryButton, 1);
                SetColumn(LibraryButton, 1);
                LibraryButton.BackgroundColor = Color.FromHex("#15C7C1");
                LibraryButton.HeightRequest = 90;
                LibraryButton.WidthRequest = 90;
                LibraryButton.CornerRadius = 15;
                LibraryButton.HorizontalOptions = LayoutOptions.Center;
                LibraryButton.VerticalOptions = LayoutOptions.Center;
                if (disableLibrary)
                    LibraryButton.IsEnabled = false;
                //LibraryButton.BorderWidth = 1;
                //LibraryButton.BorderColor = Color.Orange;

                CameraLabel.Text = "Camera";
                SetRow(CameraLabel, 2);
                SetColumn(CameraLabel, 0);
                CameraLabel.HorizontalOptions = LayoutOptions.Center;
                CameraLabel.HorizontalTextAlignment = TextAlignment.Center;
                CameraLabel.FontAttributes = FontAttributes.Bold;
                CameraLabel.FontSize = Device.GetNamedSize(NamedSize.Medium, CameraLabel);

                LibraryLabel.Text = "Library";
                SetRow(LibraryLabel, 2);
                SetColumn(LibraryLabel, 1);
                LibraryLabel.HorizontalOptions = LayoutOptions.Center;
                LibraryLabel.HorizontalTextAlignment = TextAlignment.Center;
                LibraryLabel.FontAttributes = FontAttributes.Bold;
                LibraryLabel.FontSize = Device.GetNamedSize(NamedSize.Medium, LibraryLabel);
            }
            Children.Add(CameraButton);
            Children.Add(LibraryButton);
            Children.Add(CameraLabel);
            Children.Add(LibraryLabel);
            firstLoad = false;
        }

        private void CameraButton_Clicked(object sender, EventArgs e)
        {
            OpenCamera();
        }

        private void LibraryButton_Clicked(object sender, EventArgs e)
        {
            OpenLibrary();
        }



        private async void OpenLibrary()
        {
            try
            {
                await CrossMedia.Current.Initialize();

                if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
                {
                    return;
                }

                var file = await CrossMedia.Current.PickPhotoAsync(new Plugin.Media.Abstractions.PickMediaOptions()
                {
                    CompressionQuality = 15,
                    PhotoSize = Plugin.Media.Abstractions.PhotoSize.Full,
                });

                if (file == null)
                    return;

                AddPhoto(file);
            }
            catch
            {
                return;
            }
        }

        private async void OpenCamera()
        {
            try
            {
                await CrossMedia.Current.Initialize();

                if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
                {
                    return;
                }

                String filename = String.Format("{0:yyyy-MM-dd HH:mm:ss.fff}.png", DateTime.Now);

                var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
                {
                    Name = filename,
                    CompressionQuality = 15,
                    PhotoSize = Plugin.Media.Abstractions.PhotoSize.Full,
                    SaveMetaData = false
                });

                if (file == null)
                    return;

                AddPhoto(file);
            }
            catch
            { }

        }

        private async void AddPhoto(Plugin.Media.Abstractions.MediaFile file)
        {
            try
            {
                using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Adding Photo"))
                {
                    var memoryStream = new MemoryStream();

                    if (Device.RuntimePlatform.Equals(Device.Android))                                       
                        file.GetStream().CopyTo(memoryStream);                    
                    else if (Device.RuntimePlatform.Equals(Device.iOS))                   
                        file.GetStreamWithImageRotatedForExternalStorage().CopyTo(memoryStream);
                    
                    var data = memoryStream.ToArray();

                    DataToImage(data);
                }
            }
            catch
            { }
        }

        public void DataToImage(byte[] data)
        {
            try
            {
                ImageSource src = ImageSource.FromStream(() => new MemoryStream(data));

                Image = new Image();
                Image.HeightRequest = 200;
                Image.WidthRequest = 200;
                Image.Aspect = Aspect.AspectFit;
                Image.VerticalOptions = LayoutOptions.FillAndExpand;
                Image.HorizontalOptions = LayoutOptions.FillAndExpand;
                Image.Source = src;
                Image.GestureRecognizers.Add(new TapGestureRecognizer
                {
                    Command = new Command(OnTap),
                    CommandParameter = src,
                    NumberOfTapsRequired = 1
                });
                if (Image != null)
                {
                    Device.BeginInvokeOnMainThread(() =>
                    {
                        Children.Clear();
                        RowDefinitions.Clear();
                        ColumnDefinitions.Clear();
                        //SetColumn(Image, 0);
                        //SetColumnSpan(Image, 2);
                        //SetRow(Image, 0);
                        //SetRowSpan(Image, 3);
                        Children.Add(Image);
                        //ForceLayout();
                    });
                }
            }
            catch
            { }
        }

        private void OnTap(object obj)
        {
            ImageViewerEditor imageViewEditor = new ImageViewerEditor(obj as ImageSource, true);
            imageViewEditor.OnDeleteSelected += Viewer_OnDeleteSelected;
            imageViewEditor.OnSaveSelected += ImageViewEditor_OnSaveSelected;
            Navigation.PushAsync(imageViewEditor);
        }

        private void ImageViewEditor_OnSaveSelected(byte[] array)
        {
            DataToImage(array);
        }

        private void Viewer_OnDeleteSelected()
        {
            Document = new Document();
            Image = new Image();
            Image.Source = null;
            Children.Clear();
            AddColumnsAndRows();
            AddButtons();
        }

        public void ClearItems()
        {
            Image = new Image();
            Image.Source = null;
            Children.Clear();
        }
    }
}