/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;
using MessageBox.Avalonia.Enums;
using UVtools.Core.FileFormats;
using UVtools.Core.Objects;
using UVtools.WPF.Extensions;
using UVtools.WPF.Structures;
using Bitmap = Avalonia.Media.Imaging.Bitmap;
using Helpers = UVtools.WPF.Controls.Helpers;

namespace UVtools.WPF
{
    public partial class MainWindow
    {
        public ObservableCollection<SlicerProperty> SlicerProperties { get; } = new ObservableCollection<SlicerProperty>();
        public DataGrid PropertiesGrid;
        public DataGrid CurrentLayerGrid;

        private uint _visibleThumbnailIndex;
        private Bitmap _visibleThumbnailImage;
        private ObservableCollection<StringTag> _currentLayerProperties = new ObservableCollection<StringTag>();

        public ObservableCollection<StringTag> CurrentLayerProperties
        {
            get => _currentLayerProperties;
            set => RaiseAndSetIfChanged(ref _currentLayerProperties, value);
        }

        public void InitInformation()
        {
            PropertiesGrid = this.Find<DataGrid>(nameof(PropertiesGrid));
            CurrentLayerGrid = this.Find<DataGrid>(nameof(CurrentLayerGrid));
            PropertiesGrid.KeyUp += GridOnKeyUp;
            CurrentLayerGrid.KeyUp += GridOnKeyUp;
            /*CurrentLayerGrid.BeginningEdit += (sender, e) =>
            {
                if (e.Row.DataContext is StringTag stringTag)
                {
                    if (e.Column.DisplayIndex == 0
                        || e.Row.DataContext.ToString() != nameof(LayerCache.Layer.ExposureTime)
                        && e.Row.DataContext.ToString() != nameof(LayerCache.Layer.LightPWM)
                    )
                    {
                        e.Cancel = true;
                    }
                }
                else
                {
                    e.Cancel = true;
                }
            };
            CurrentLayerGrid.RowEditEnding += (sender, e) =>
            {
                if (e.EditAction == DataGridEditAction.Cancel) return;
                if (!(e.Row.DataContext is StringTag stringTag)) return;
                if (float.TryParse(stringTag.TagString, out var result)) return;
                e.Cancel = true;
            };
            CurrentLayerGrid.RowEditEnded += (sender, e) =>
            {
                if (e.EditAction == DataGridEditAction.Cancel) return;
                if (!(e.Row.DataContext is StringTag stringTag)) return;
                switch (stringTag.Content)
                {
                    //case nameof(LayerCache.)
                }
            };*/

        }

        private void GridOnKeyUp(object? sender, KeyEventArgs e)
        {
            if (sender is DataGrid dataGrid)
            {
                switch (e.Key)
                {
                    case Key.Escape:
                        dataGrid.SelectedItems.Clear();
                        break;
                    case Key.Multiply:
                        foreach (var item in dataGrid.Items)
                        {
                            if (dataGrid.SelectedItems.Contains(item))
                                dataGrid.SelectedItems.Remove(item);
                            else
                                dataGrid.SelectedItems.Add(item);
                        }

                        break;
                }
            }
        }

        #region Thumbnails
        public uint VisibleThumbnailIndex
        {
            get => _visibleThumbnailIndex;
            set
            {
                if (value == 0)
                {
                    RaiseAndSetIfChanged(ref _visibleThumbnailIndex, value);
                    RaisePropertyChanged(nameof(ThumbnailCanGoPrevious));
                    RaisePropertyChanged(nameof(ThumbnailCanGoNext));
                    VisibleThumbnailImage = null;
                    return;
                }

                if (!IsFileLoaded) return;
                var index = value - 1;
                if (index >= SlicerFile.CreatedThumbnailsCount) return;
                if (SlicerFile.Thumbnails[index] is null) return;
                if (!RaiseAndSetIfChanged(ref _visibleThumbnailIndex, value)) return;

                VisibleThumbnailImage = SlicerFile.Thumbnails[index].ToBitmap();
                RaisePropertyChanged(nameof(ThumbnailCanGoPrevious));
                RaisePropertyChanged(nameof(ThumbnailCanGoNext));
            }
        }

        public bool ThumbnailCanGoPrevious => SlicerFile is { } && _visibleThumbnailIndex > 1;
        public bool ThumbnailCanGoNext => SlicerFile is { } && _visibleThumbnailIndex < SlicerFile.CreatedThumbnailsCount;

        public void ThumbnailGoPrevious()
        {
            if (!ThumbnailCanGoPrevious) return;
            VisibleThumbnailIndex--;
        }

        public void ThumbnailGoNext()
        {
            if (!ThumbnailCanGoNext) return;
            VisibleThumbnailIndex++;
        }

        public Bitmap VisibleThumbnailImage
        {
            get => _visibleThumbnailImage;
            set
            {
                RaiseAndSetIfChanged(ref _visibleThumbnailImage, value);
                RaisePropertyChanged(nameof(VisibleThumbnailResolution));
            }
        }

        public string VisibleThumbnailResolution => _visibleThumbnailImage is null ? null : $"{{Width: {_visibleThumbnailImage.Size.Width}, Height: {_visibleThumbnailImage.Size.Height}}}";

        public async void OnClickThumbnailSave()
        {
            if (SlicerFile is null) return;
            if (ReferenceEquals(SlicerFile.Thumbnails[_visibleThumbnailIndex - 1], null))
            {
                return; // This should never happen!
            }
            var dialog = new SaveFileDialog
            {
                Filters = Helpers.PngFileFilter,
                Directory = Path.GetDirectoryName(SlicerFile.FileFullPath),
                InitialFileName = $"{Path.GetFileNameWithoutExtension(SlicerFile.FileFullPath)}_thumbnail{_visibleThumbnailIndex}.png"
            };

            var filepath = await dialog.ShowAsync(this);

            if (!string.IsNullOrEmpty(filepath))
            {
                SlicerFile.Thumbnails[_visibleThumbnailIndex - 1].Save(filepath);
            }
        }

        public async void OnClickThumbnailImport()
        {
            if (_visibleThumbnailIndex <= 0) return;
            if (ReferenceEquals(SlicerFile.Thumbnails[_visibleThumbnailIndex - 1], null))
            {
                return; // This should never happen!
            }

            var dialog = new OpenFileDialog
            {
                Filters = Helpers.ImagesFileFilter,
                AllowMultiple = false
            };

            var filepath = await dialog.ShowAsync(this);

            if (filepath is null || filepath.Length <= 0) return;
            int i = (int)(_visibleThumbnailIndex - 1);
            SlicerFile.SetThumbnail(i, filepath[0]);
            VisibleThumbnailImage = SlicerFile.Thumbnails[i].ToBitmap();
        }
        #endregion

        #region Slicer Properties

        public async void OnClickPropertiesSaveFile()
        {
            if (SlicerFile?.Configs is null) return;

            var dialog = new SaveFileDialog
            {
                Filters = Helpers.IniFileFilter,
                Directory = Path.GetDirectoryName(SlicerFile.FileFullPath),
                InitialFileName = $"{Path.GetFileNameWithoutExtension(SlicerFile.FileFullPath)}_properties.ini"
            };

            var file = await dialog.ShowAsync(this);

            if (string.IsNullOrEmpty(file)) return;

            try
            {
                using (TextWriter tw = new StreamWriter(file))
                {
                    foreach (var config in SlicerFile.Configs)
                    {
                        var type = config.GetType();
                        tw.WriteLine($"[{type.Name}]");
                        foreach (var property in type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
                        {
                            if (property.Name.Equals("Item")) continue;
                            var value = property.GetValue(config);
                            switch (value)
                            {
                                case null:
                                    continue;
                                case IList list:
                                    tw.WriteLine($"{property.Name} = {list.Count}");
                                    break;
                                default:
                                    tw.WriteLine($"{property.Name} = {value}");
                                    break;
                            }
                        }
                        tw.WriteLine();
                    }
                    tw.Close();
                }
            }
            catch (Exception e)
            {
                await this.MessageBoxError(e.ToString(), "Error occur while save properties");
                return;
            }

            var result = await this.MessageBoxQuestion(
                "Properties save was successful. Do you want open the file in the default editor?",
                "Properties save complete");
            if (result != ButtonResult.Yes) return;

            App.StartProcess(file);
        }

        public void OnClickPropertiesSaveClipboard()
        {
            if (SlicerFile?.Configs is null) return;
            var sb = new StringBuilder();
            foreach (var config in SlicerFile.Configs)
            {
                var type = config.GetType();
                sb.AppendLine($"[{type.Name}]");
                foreach (var property in type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
                {
                    if (property.Name.Equals("Item")) continue;
                    var value = property.GetValue(config);
                    switch (value)
                    {
                        case null:
                            continue;
                        case IList list:
                            sb.AppendLine($"{property.Name} = {list.Count}");
                            break;
                        default:
                            sb.AppendLine($"{property.Name} = {value}");
                            break;
                    }
                }

                sb.AppendLine();
            }

            Application.Current.Clipboard.SetTextAsync(sb.ToString());
        }

        public void RefreshProperties()
        {
            SlicerProperties.Clear();
            if (SlicerFile.Configs is null) return;
            foreach (var config in SlicerFile.Configs)
            {
                var type = config.GetType();
                foreach (var property in type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
                {
                    if (property.Name.Equals("Item")) continue;
                    var value = property.GetValue(config);
                    switch (value)
                    {
                        case null:
                            continue;
                        case IList list:
                            SlicerProperties.Add(new SlicerProperty(property.Name, list.Count.ToString(),
                                config.GetType().Name));
                            break;
                        default:
                            SlicerProperties.Add(
                                new SlicerProperty(property.Name, value.ToString(), config.GetType().Name));
                            break;
                    }
                }
            }
        }
        #endregion

        #region Current Layer

        public void RefreshCurrentLayerData()
        {
            var layer = LayerCache.Layer;
            CurrentLayerProperties.Clear();
            CurrentLayerProperties.Add(new StringTag(nameof(layer.Index), $"{layer.Index}"));
            CurrentLayerProperties.Add(new StringTag(nameof(layer.LayerHeight), $"{layer.LayerHeight:F2}mm"));
            //CurrentLayerProperties.Add(new KeyValuePair<string, string>(nameof(layer.Filename), layer.Filename));
            CurrentLayerProperties.Add(new StringTag(nameof(layer.PositionZ), $"{layer.PositionZ:F2}mm"));
            CurrentLayerProperties.Add(new StringTag(nameof(layer.IsBottomLayer), layer.IsBottomLayer.ToString()));
            CurrentLayerProperties.Add(new StringTag(nameof(layer.IsModified), layer.IsModified.ToString()));
            //CurrentLayerProperties.Add(new StringTag(nameof(layer.BoundingRectangle), layer.BoundingRectangle.ToString()));
            //CurrentLayerProperties.Add(new StringTag(nameof(layer.NonZeroPixelCount), layer.NonZeroPixelCount.ToString()));
            CurrentLayerProperties.Add(new StringTag(nameof(layer.ExposureTime), $"{layer.ExposureTime:F2}s"));

            if (ReferenceEquals(SlicerFile.PrintParameterPerLayerModifiers, null)) return;

            if (SlicerFile.PrintParameterPerLayerModifiers.Contains(FileFormat.PrintParameterModifier.LiftHeight))
                CurrentLayerProperties.Add(new StringTag(nameof(layer.LiftHeight),
                    $"{layer.LiftHeight.ToString(CultureInfo.InvariantCulture)}mm @ {layer.LiftSpeed.ToString(CultureInfo.InvariantCulture)}mm/min"));
            //CurrentLayerProperties.Adnew StringTagg>(nameof(layer.LiftSpeed), $"{layer.LiftSpeed.ToString(CultureInfo.InvariantCulture)}mm/min"));
            if (SlicerFile.PrintParameterPerLayerModifiers.Contains(FileFormat.PrintParameterModifier.RetractSpeed))
                CurrentLayerProperties.Add(new StringTag(nameof(layer.RetractSpeed),
                    $"{layer.RetractSpeed.ToString(CultureInfo.InvariantCulture)}mm/min"));
            if (SlicerFile.PrintParameterPerLayerModifiers.Contains(FileFormat.PrintParameterModifier.LightOffDelay))
                CurrentLayerProperties.Add(new StringTag(nameof(layer.LightOffDelay),
                    $"{layer.LightOffDelay.ToString(CultureInfo.InvariantCulture)}s"));
            if (SlicerFile.PrintParameterPerLayerModifiers.Contains(FileFormat.PrintParameterModifier.LightPWM))
                CurrentLayerProperties.Add(new StringTag(nameof(layer.LightPWM), layer.LightPWM.ToString()));
        }
        #endregion
    }
}