using Microsoft.Win32;
using Newtonsoft.Json;
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;

namespace WPFDemo
{
    /// <summary>
    /// SiloPanel.xaml 的交互逻辑
    /// </summary>
    public partial class SiloPanel : UserControl, INotifyPropertyChanged
    {
        //料仓模块左键按下标识
        bool siloIsMouseDown = false;
        //画线标识
        bool lineIsDraw = false;
        //当前线条
        private Line currentLine;
        //线条集合
        private List<Line> lines = new List<Line>();
        //料仓集合
        private List<Silo> silos = new List<Silo>();
        //用于序列化
        private Segment segment = new Segment();

        //提示
        private string tips = "常规模式";
        /// <summary>
        /// 提示
        /// </summary>
        public string Tips
        {
            get { return tips; }
            set
            {
                tips = value;
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Tips"));
            }
        }
        /// <summary>
        /// 当前选中的料仓
        /// </summary>
        public Silo CurrentSilo { get; private set; }

        /// <summary>
        /// 画布宽度
        /// </summary>
        public double PanelWidth
        {
            get { return (double)GetValue(PanelWidthProperty); }
            set { SetValue(PanelWidthProperty, value); }
        }

        // Using a DependencyProperty as the backing store for PanelWidth.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty PanelWidthProperty =
            DependencyProperty.Register("PanelWidth", typeof(double), typeof(SiloPanel), new PropertyMetadata(1920d));


        /// <summary>
        /// 画布高度
        /// </summary>
        public double PanelHeight
        {
            get { return (double)GetValue(PanelHeightProperty); }
            set { SetValue(PanelHeightProperty, value); }
        }

        // Using a DependencyProperty as the backing store for PanelHeight.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty PanelHeightProperty =
            DependencyProperty.Register("PanelHeight", typeof(double), typeof(SiloPanel), new PropertyMetadata(1080d));

        public event PropertyChangedEventHandler? PropertyChanged;

        public SiloPanel()
        {
            InitializeComponent();
            cvMain.PreviewMouseLeftButtonDown += CvMain_PreviewMouseLeftButtonDown;
            cvMain.PreviewMouseMove += CvMain_PreviewMouseMove;
            cvMain.PreviewMouseLeftButtonUp += CvMain_PreviewMouseLeftButtonUp;
        }

        /// <summary>
        /// 开始画线
        /// </summary>
        public void AddLine()
        {
            lineIsDraw = true;
            Tips = "线条绘制";
        }

        /// <summary>
        /// 添加料仓模块
        /// </summary>
        public void AddSilo()
        {
            if (lineIsDraw)
                lineIsDraw = false;
            newSilo(String.Empty, String.Empty);
        }

        /// <summary>
        /// 保存文件
        /// </summary>
        public void Save()
        {
            segment.Silos.Clear();
            segment.Lines.Clear();
            lines.ForEach(line =>
            {
                segment.Lines.Add(new Segment.SimpleLine() { X1 = line.X1, X2 = line.X2, Y1 = line.Y1, Y2 = line.Y2 });
            });
            silos.ForEach(silo =>
            {
                segment.Silos.Add(new Segment.SimpleSilo()
                {
                    Left = (double)silo.GetValue(Canvas.LeftProperty),
                    Top = (double)silo.GetValue(Canvas.TopProperty),
                    Caption = silo.Caption,
                    Index = silo.Index
                });
            });


            string ResultJson = JsonConvert.SerializeObject(segment);
            SaveFileDialog dialog = new SaveFileDialog();
            dialog.Filter = "配置文件|*.json";
            if (dialog.ShowDialog() == true)
            {
                File.WriteAllText(dialog.FileName, ResultJson);
            }
        }

        /// <summary>
        /// 加载文件
        /// </summary>
        public void Load()
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.Filter = "配置文件|*.json";
            if (dialog.ShowDialog() == true)
            {
                string content = File.ReadAllText(dialog.FileName);
                try
                {
                    segment = JsonConvert.DeserializeObject<Segment>(content);
                    lines.Clear();
                    silos.Clear();
                    cvMain.Children.Clear();
                    foreach (var line in segment.Lines)
                    {
                        newLine(line.X1, line.Y1, line.X2, line.Y2);
                    }
                    foreach (var temp in segment.Silos)
                    {
                        newSilo(temp.Caption, temp.Index,temp.Left,temp.Top);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        /// <summary>
        /// 清空画布
        /// </summary>
        public void Clear()
        {
            lines.Clear();
            silos.Clear();
            cvMain.Children.Clear();
        }

        private void newSilo(string caption, string index, double left = -1, double top = -1)
        {
            Silo silo = new Silo() { Caption = caption, Index = index };
            if (left == -1)
                silo.SetValue(Canvas.LeftProperty, cvMain.ActualWidth / 2 - silo.Width / 2);
            else
                silo.SetValue(Canvas.LeftProperty, left);

            if (top == -1)
                silo.SetValue(Canvas.TopProperty, cvMain.ActualHeight / 2 - silo.Height / 2);
            else
                silo.SetValue(Canvas.TopProperty, top);

            silo.AllowDrop = true;
            cvMain.Children.Add(silo);
            silos.Add(silo);
            silo.PreviewMouseLeftButtonDown += Silo_PreviewMouseLeftButtonDown;
            silo.PreviewMouseMove += Silo_PreviewMouseMove;
            silo.PreviewMouseLeftButtonUp += Silo_PreviewMouseLeftButtonUp;

            CurrentSilo = silo;
        }

        private void newLine(double x1, double y1, double x2, double y2)
        {
            var temp = new Line();
            temp.Stroke = Brushes.Green;
            temp.StrokeThickness = 1;
            temp.X1 = x1;
            temp.Y1 = y1;
            temp.X2 = x2;
            temp.Y2 = y2;
            cvMain.Children.Add(temp);
            lines.Add(temp);

            currentLine = temp;
        }

        private void CvMain_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            lineIsDraw = false;
            Tips = "常规模式";
        }

        private void CvMain_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed && lineIsDraw)
            {
                Point point = e.GetPosition(cvMain);
                currentLine.X2 = point.X;
                currentLine.Y2 = point.Y;
            }
        }

        private void CvMain_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (!lineIsDraw)
                return;
            var point = e.GetPosition(cvMain);
            newLine(point.X, point.Y, point.X, point.Y);

        }



        private void Silo_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            var c = sender as UIElement;
            siloIsMouseDown = false;
            c.ReleaseMouseCapture();
            CurrentSilo = sender as Silo;
        }

        private void Silo_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (siloIsMouseDown)
            {
                var c = sender as UIElement;
                var pos = e.GetPosition(this);
                c.SetValue(Canvas.LeftProperty, pos.X);
                c.SetValue(Canvas.TopProperty, pos.Y);
            }
        }

        private void Silo_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            var c = sender as UIElement;
            siloIsMouseDown = true;
            var transform = c.RenderTransform as TranslateTransform;
            if (transform == null)
            {
                transform = new TranslateTransform();
                c.RenderTransform = transform;
            }
            c.CaptureMouse();
        }


    }
}