using GUI.DataProvider;
using GUI.GUIUtils;
using GUI.Hook;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

namespace GUI
{
    public partial class ControllerGUI : Form
    {
        readonly EventPerformer<ISizeChangedListener> sizeEvent;
        readonly CheckGroup<BottomButton> bottomGroup;
        readonly KeyboardHook keyboard;
        readonly MouseHook mouse;

        public IGUIDataSource dataSource;
        ComAgent agent => Program.comAgent;
        Point screenCenter => new(Screen.PrimaryScreen.Bounds.Width / 2, Screen.PrimaryScreen.Bounds.Height / 2);
        Point screenRightDown => new(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
        
        public ControllerGUI()
        {
            ComConfig guiCfg = new ComConfig();
            guiCfg.ShowDialog();
            if (Program.comAgent == null)
                Process.GetCurrentProcess().Kill();
            MessageBox.Show(
                "按F12暂停和继续控制程序",
                "控制器",
                MessageBoxButtons.OK, MessageBoxIcon.Information);

            InitializeComponent();

            dataSource = agent;
            sizeEvent = new();
            sizeEvent.AddSafe(new GUIParagraph(BottomLayout));
            sizeEvent.AddSafe(new GUIParagraph(LayoutRight)
            {
                Target = GUIParagraph.TargetXY.Y,
                FixedPaneReferenceFunc = (c, f) => c.Size = new(f.Width - 3, c.Height)
            });
            bottomGroup = new();
            bottomGroup.AddSafe(bottomButton1, bottomButton2, bottomButton3);
            OnSizeChanged(null);

            keyboard = new();
            keyboard.SetHook();
            keyboard.OnKeyDownEvent += keyDown;
            keyboard.OnKeyUpEvent += keyUp;
            mouse = new();
            mouse.SetHook();
            mouse.OnMouseMoveEvent += mouseMove;
            mouse.OnMouseDownEvent += mouseDown;
            mouse.OnMouseUpEvent += mouseUp;
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            base.OnFormClosing(e);
            keyboard.UnHook();
        }

        void keyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.F12:
                    Visible = !Visible;
                    if (Visible)
                    {
                        mouseGotoCenter();
                        Cursor.Hide();
                        mouse.SetHook();
                    }
                    else
                    {
                        mouse.UnHook();
                        Cursor.Show();
                    }
                    break;
                case Keys.Q: agent.Q = true; break;
                case Keys.W: agent.W = true; break;
                case Keys.E: agent.E = true; break;
                case Keys.A: agent.A = true; break;
                case Keys.S: agent.S = true; break;
                case Keys.D: agent.D = true; break;
                case Keys.LButton: agent.L = true; break;
                case Keys.RButton: agent.R = true; break;
            }
        }

        void keyUp(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Q: agent.Q = false; break;
                case Keys.W: agent.W = false; break;
                case Keys.E: agent.E = false; break;
                case Keys.A: agent.A = false; break;
                case Keys.S: agent.S = false; break;
                case Keys.D: agent.D = false; break;
                case Keys.LButton: agent.L = false; break;
                case Keys.RButton: agent.R = false; break;
            }
        }

        void mouseDown(object sender, MouseEventArgs e)
        {
            switch (e.Button)
            {
                case MouseButtons.Left: agent.L = true; break;
                case MouseButtons.Right: agent.R = true; break;
            }
        }

        void mouseUp(object sender, MouseEventArgs e)
        {
            switch (e.Button)
            {
                case MouseButtons.Left: agent.L = false; break;
                case MouseButtons.Right: agent.R = false; break;
            }
        }

        int sx, sy;

        void mouseMove(object sender, MouseEventArgs e)
        {
            sx = e.X - screenCenter.X;
            sy = e.Y - screenCenter.Y;
        }

        void ControllerGUI_Resize(object sender, EventArgs e)
        {
            LayoutRight.Size = new(Width / 4, LayoutRight.Height);
            sizeEvent?.Perform(p => p.OnSizeChanged());
        }

        void mouseGotoCenter()
        {
            Win32Api.mouse_event(Win32Api.MOUSEEVENTF_MOVE | Win32Api.MOUSEEVENTF_ABSOLUTE,
                screenCenter.X * 65535 / screenRightDown.X,
                screenCenter.Y * 65535 / screenRightDown.Y, 0, 0);
        }

        private void mouseTimer_Tick(object sender, EventArgs e)
        {
            if (!Visible) return;
            agent.Move(++sx, ++sy);
            mouseGotoCenter();
        }

        void timer1_Tick(object sender, EventArgs e)
        {
            if (!Visible) return;
            DirectionRule.Degree = dataSource?.Yaw ?? 0;
            roulette.Degree = dataSource?.Roll ?? 0;

            agent.SendFrame();
            agent.ResetMove();
        }
    }
}