using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using AIPractice.Shared.Labels;
using Microsoft.Win32;

namespace AIPractice.LabelEditor
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private string _oldContent;
        private string _openedFile;

        public string OpenedFile
        {
            get { return _openedFile; }
            set
            {
                if (_openedFile != value)
                {
                    _openedFile = value;
                    Title = $"标签编辑器 - [{_openedFile}]";

                }
            }
        }

        public MainWindow()
        {
            InitializeComponent();
            var container = new LabelContainer();
            App.Container = new LabelContainerViewModel(container);
            _oldContent = container.ToXml();
            DataContext = App.Container;
            Closing += OnClosing;
        }

        private void OnClosing(object sender, CancelEventArgs e)
        {
            if (_oldContent != App.Container.Container.ToXml())
            {
                var result = MessageBox.Show(this, "是否保存当前标签？", "标签编辑器", MessageBoxButton.YesNoCancel,
                    MessageBoxImage.Question);
                if (result == MessageBoxResult.Yes)
                {
                    OnSaveClick(this, null);
                }

                if (result == MessageBoxResult.Cancel)
                {
                    e.Cancel = true;
                }
            }
        }

        private void OnOpenLabelClick(object sender, RoutedEventArgs e)
        {
            var ofd = new OpenFileDialog();
            ofd.Filter = "标签文件|*.lb|XML文件|*.xml";
            if (ofd.ShowDialog() == true)
            {
                var targetFile = ofd.FileName;
                try
                {
                    var container = LabelContainer.Open(targetFile);
                    App.Container = new LabelContainerViewModel(container);
                    DataContext = null;
                    DataContext = App.Container;
                    if (App.Container.Labels.Count > 0)
                    {
                        App.Container.SelectedRootLabel = App.Container.Labels[0];
                    }

                    OpenedFile = targetFile;
                    _oldContent = App.Container.Container.ToXml();
                }
                catch (Exception)
                {
                    MessageBox.Show(this,"打开标签文件失败", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
        }

        private string GetUniqueRootLabelName(string prefix)
        {
            var index = 1;
            while (App.Container.Labels.Any(x=>x.Title == $"{prefix}{index}"))
            {
                index++;
            }

            return $"{prefix}{index}";
        }

        private string GetUniqueDescriptionGroupName(string prefix)
        {
            var index = 1;
            while (App.Container.SelectedRootLabel.Descriptions.Any(x => x.Title == $"{prefix}{index}"))
            {
                index++;
            }

            return $"{prefix}{index}";
        }

        private string GetUniqueConclusionGroupName(string prefix)
        {
            var index = 1;
            while (App.Container.SelectedRootLabel.Conclusions.Any(x => x.Title == $"{prefix}{index}"))
            {
                index++;
            }

            return $"{prefix}{index}";
        }

        private void OnAddRootLabelClick(object sender, RoutedEventArgs e)
        {
            var id = Guid.NewGuid().ToString("N").ToUpper();
            var name = GetUniqueRootLabelName("新建部位");
            var rootLabel = new RootLabel(id, name, new List<LabelGroup>(), new List<LabelGroup>(), new List<LabelAssociation>());
            App.Container.Labels.Add(new RootLabelViewModel(rootLabel));
        }

        private void OnAddMultiDescriptionGroupClick(object sender, RoutedEventArgs e)
        {
            if (App.Container.SelectedRootLabel != null)
            {
                var id = Guid.NewGuid().ToString("N").ToUpper();
                var name = GetUniqueDescriptionGroupName("新建描述标签组");
                var multiSelectionLabelGroup =
                    new MultiSelectionLabelGroup(id, name, GroupType.All, new List<ImageLabel>());
                var multiSelectionGroupViewModel = new MultiSelectionLabelGroupViewModel(multiSelectionLabelGroup);
                App.Container.SelectedRootLabel.Descriptions.Add(multiSelectionGroupViewModel);
                DescriptionScroller.ScrollToBottom();
            }
        }

        private void OnAddSingleDescriptionGroupClick(object sender, RoutedEventArgs e)
        {
            if (App.Container.SelectedRootLabel != null)
            {
                var id = Guid.NewGuid().ToString("N").ToUpper();
                var name = GetUniqueDescriptionGroupName("新建描述标签组");
                var singleSelectionLabelGroup =
                    new SingleSelectionLabelGroup(id, name, GroupType.All, new List<ImageLabel>());
                var singleSelectionGroupViewModel = new SingleSelectionLabelGroupViewModel(singleSelectionLabelGroup);
                App.Container.SelectedRootLabel.Descriptions.Add(singleSelectionGroupViewModel);
                DescriptionScroller.ScrollToBottom();
            }
        }

        private void OnAddMultiConclusionGroupClick(object sender, RoutedEventArgs e)
        {
            if (App.Container.SelectedRootLabel != null)
            {
                var id = Guid.NewGuid().ToString("N").ToUpper();
                var name = GetUniqueConclusionGroupName("新建结论标签组");
                var multiSelectionLabelGroup =
                    new MultiSelectionLabelGroup(id, name, GroupType.All, new List<ImageLabel>());
                var multiSelectionGroupViewModel = new MultiSelectionLabelGroupViewModel(multiSelectionLabelGroup);
                App.Container.SelectedRootLabel.Conclusions.Add(multiSelectionGroupViewModel);
                ConclusionScroller.ScrollToBottom();
            }
        }


        private void OnAddSingleConclusionGroupClick(object sender, RoutedEventArgs e)
        {
            if (App.Container.SelectedRootLabel != null)
            {
                var id = Guid.NewGuid().ToString("N").ToUpper();
                var name = GetUniqueConclusionGroupName("新建结论标签组");
                var singleSelectionLabelGroup =
                    new SingleSelectionLabelGroup(id, name, GroupType.All, new List<ImageLabel>());
                var singleSelectionGroupViewModel = new SingleSelectionLabelGroupViewModel(singleSelectionLabelGroup);
                App.Container.SelectedRootLabel.Conclusions.Add(singleSelectionGroupViewModel);
                ConclusionScroller.ScrollToBottom();
            }
        }

        private void OnSaveClick(object sender, RoutedEventArgs e)
        {
            foreach(var root in App.Container.Labels)
            {
                root.RootLabel.ClearLabelAssociations();
                foreach(var group in root.Descriptions)
                {
                    foreach(var label in group.Labels)
                    {
                        if(label.Linked != null)
                        {
                            var left = (DescriptionLabelViewModel)label;
                            var right = (ConclusionLabelViewModel)label.Linked;
                            root.RootLabel.AddLabelAssociation(new LabelAssociation(left.Description, right.Conclusion));
                        }
                    }
                }
            }
            if (_openedFile != null)
            {
                App.Container.Container.Save(_openedFile);
                _oldContent = App.Container.Container.ToXml();
            }
            else
            {
                var sfd = new SaveFileDialog
                {
                    Filter = "标签文件|*.lb|XML文件|*.xml"
                };
                if (sfd.ShowDialog() == true)
                {
                    var targetFile = sfd.FileName;
                    App.Container.Container.Save(targetFile);
                    OpenedFile = targetFile;
                    _oldContent = App.Container.Container.ToXml();
                }
            }
        }

        private void OnSaveAsClick(object sender, RoutedEventArgs e)
        {
            foreach (var root in App.Container.Labels)
            {
                root.RootLabel.ClearLabelAssociations();
                foreach (var group in root.Descriptions)
                {
                    foreach (var label in group.Labels)
                    {
                        if (label.Linked != null)
                        {
                            var left = (DescriptionLabelViewModel)label;
                            var right = (ConclusionLabelViewModel)label.Linked;
                            root.RootLabel.AddLabelAssociation(new LabelAssociation(left.Description, right.Conclusion));
                        }
                    }
                }
            }
            var sfd = new SaveFileDialog
            {
                Filter = "标签文件|*.lb|XML文件|*.xml"
            };
            if (sfd.ShowDialog() == true)
            {
                var targetFile = sfd.FileName;
                App.Container.Container.Save(targetFile);
                OpenedFile = targetFile;
                _oldContent = App.Container.Container.ToXml();
            }
        }
    }
}