using MahApps.Metro.Controls;
using System;
using System.Collections.Generic;
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 Tango.Core.DI;
using Tango.FSE.Common;
using Tango.FSE.Common.FSEApplication;
using Tango.FSE.Common.Resolution;
using Tango.FSE.UI.DemoMode;
using Tango.Settings;

namespace Tango.FSE.UI
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : MetroWindow
    {
        public static MainWindow Instance { get; set; }
        private Point _startPoint;
        private bool _isMouseDown;
        private FSESettings _settings;
        private IResolutionService _resolutionService;

        public MainWindow()
        {
            Instance = this;
            InitializeComponent();

            _settings = SettingsManager.Default.GetOrCreate<FSESettings>();

            ApplyAdaptiveTransform();

            IFSEApplicationManager appManager = TangoIOC.Default.GetInstance<IFSEApplicationManager>();

            ContentRendered += (_, __) => 
            {
                if (appManager.DemoMode)
                {
                    DemoModeWindow demoWindow = new DemoModeWindow();
                    demoWindow.Show();
                }
            };

            Closing += (x, e) =>
            {
                e.Cancel = true;
                appManager.ShutDown();
            };

            btnMinimize.Click += (_, __) => WindowState = WindowState.Minimized;
            btnMaximize.Click += (_, __) => WindowState = WindowState == WindowState.Maximized ? WindowState = WindowState.Normal : WindowState = WindowState.Maximized;
            btnClose.Click += (_, __) => Close();
            gridTitle.MouseLeftButtonDown += (x, e) =>
            {
                Mouse.Capture(gridTitle);

                _startPoint = e.GetPosition(this);

                if (e.ClickCount > 1 && appManager.DisplayWindowControls)
                {
                    WindowState = WindowState == WindowState.Normal ? WindowState.Maximized : WindowState.Normal;
                    return;
                }

                _isMouseDown = true;
            };
            gridTitle.MouseLeftButtonUp += (x, e) =>
            {
                _isMouseDown = false;
                gridTitle.ReleaseMouseCapture();
            };
            gridTitle.MouseMove += GridTitle_MouseMove;
            StateChanged += MainWindow_StateChanged;
        }

        private void MainWindow_StateChanged(object sender, EventArgs e)
        {
            if (WindowState == WindowState.Maximized)
            {
                btnMaximize.Icon = MaterialDesignThemes.Wpf.PackIconKind.WindowRestore;
                _settings.WindowMaximizedOnStartup = true;
                _settings.Save();
            }
            else if (WindowState == WindowState.Normal)
            {
                btnMaximize.Icon = MaterialDesignThemes.Wpf.PackIconKind.WindowMaximize;
                _settings.WindowMaximizedOnStartup = false;
                _settings.Save();
            }
        }

        private void GridTitle_MouseMove(object sender, MouseEventArgs e)
        {
            if (_isMouseDown)
            {
                if (WindowState == WindowState.Maximized)
                {
                    var previousWidth = Width;
                    WindowState = WindowState.Normal;
                    var currentWidth = Width;
                    var locationPrecentageBefore = _startPoint.X / previousWidth;
                    var newLocationX = currentWidth * locationPrecentageBefore;
                    _startPoint = new Point(newLocationX, _startPoint.Y);
                }
                else
                {
                    Point pointToWindow = Mouse.GetPosition(this);
                    Point pointToScreen = PointToScreen(pointToWindow);

                    Left = pointToScreen.X - _startPoint.X;
                    Top = pointToScreen.Y - _startPoint.Y;
                }
            }
        }

        private void ApplyAdaptiveTransform()
        {
            var resolution = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Size;

            if (_resolutionService == null)
            {
                _resolutionService = TangoIOC.Default.GetInstance<IResolutionService>();
            }

            if (_settings.EnableAdaptiveScaling && resolution.Width < 1600)
            {
                _resolutionService.AdaptiveScalingMode = true;

                var grid = mainGrid;
                grid.Width = 1920;
                grid.Height = 1040;
                Content = null;
                Content = new Viewbox()
                {
                    Child = mainGrid,
                    Stretch = Stretch.Fill,
                };

                var ratio = 1280d / 720d;
                MinWidth = resolution.Width / (1920d / 1280d);
                MinHeight = MinWidth / ratio;
                Width = resolution.Width - 100;
                Height = Width / ratio;
            }
            else
            {
                IgnoreTaskbarOnMaximize = resolution.Height <= 768; //Allow full screen when resolution is small.
            }

            if (System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Height < Height)
            {
                Height = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Height;
            }
        }

        protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
        {
            base.OnRenderSizeChanged(sizeInfo);

            //Add this to keep aspect ratio when AdaptiveTransform

            //if (_resolutionService.AdaptiveTransformMode)
            //{
            //    var aspect = 1920d / 1040d;

            //    if (sizeInfo.WidthChanged) this.Width = sizeInfo.NewSize.Height * aspect;
            //    else this.Height = sizeInfo.NewSize.Width / aspect;
            //}
        }
    }
}