using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;

namespace Barotrauma
{
    public static class PlayerInput
    {
        static MouseState mouseState, oldMouseState;
        static MouseState latestMouseState; //the absolute latest state, do NOT use for player interaction
        static KeyboardState keyboardState, oldKeyboardState;

        static double timeSinceClick;

        const double doubleClickDelay = 0.4;

        static bool doubleClicked;

        public static Keys selectKey = Keys.E;

        public static Vector2 MousePosition
        {
            get { return new Vector2(mouseState.Position.X, mouseState.Position.Y); }
        }

        public static Vector2 LatestMousePosition
        {
            get { return new Vector2(latestMouseState.Position.X, latestMouseState.Position.Y); }
        }

        //public static MouseState GetMouseState
        //{
        //    get { return mouseState; }
        //}
        //public static MouseState GetOldMouseState
        //{
        //    get { return oldMouseState; }
        //}

        public static bool MouseInsideWindow
        {
            get { return new Rectangle(0, 0, GameMain.GraphicsWidth, GameMain.GraphicsHeight).Contains(MousePosition); }
        }

        public static Vector2 MouseSpeed
        {
            get
            {
                return GameMain.WindowActive ? MousePosition - new Vector2(oldMouseState.X, oldMouseState.Y) : Vector2.Zero;
            }
        }

        public static KeyboardState GetKeyboardState
        {
            get { return keyboardState; }
        }

        public static KeyboardState GetOldKeyboardState
        {
            get { return oldKeyboardState; }
        }

        public static int ScrollWheelSpeed
        {
            get { return GameMain.WindowActive ? mouseState.ScrollWheelValue - oldMouseState.ScrollWheelValue : 0; }

        }

        public static bool LeftButtonHeld()
        {
            return GameMain.WindowActive && mouseState.LeftButton == ButtonState.Pressed;
        }

        public static bool LeftButtonDown()
        {
            return GameMain.WindowActive &&
                oldMouseState.LeftButton == ButtonState.Released &&
                mouseState.LeftButton == ButtonState.Pressed;
        }

        public static bool LeftButtonReleased()
        {
            return GameMain.WindowActive && mouseState.LeftButton == ButtonState.Released;
        }


        public static bool LeftButtonClicked()
        {
            return (GameMain.WindowActive &&
                oldMouseState.LeftButton == ButtonState.Pressed
                && mouseState.LeftButton == ButtonState.Released);
        }

        public static bool RightButtonHeld()
        {
            return GameMain.WindowActive && mouseState.RightButton == ButtonState.Pressed;
        }

        public static bool RightButtonClicked()
        {
            return (GameMain.WindowActive &&
                oldMouseState.RightButton == ButtonState.Pressed
                && mouseState.RightButton == ButtonState.Released);
        }

        public static bool DoubleClicked()
        {
            return GameMain.WindowActive && doubleClicked;
        }

        public static bool KeyHit(InputType inputType)
        {
            return GameMain.WindowActive && GameMain.Config.KeyBind(inputType).IsHit();
        }

        public static bool KeyDown(InputType inputType)
        {
            return GameMain.WindowActive && GameMain.Config.KeyBind(inputType).IsDown();
        }

        public static bool KeyUp(InputType inputType)
        {
            return GameMain.WindowActive && !GameMain.Config.KeyBind(inputType).IsDown();
        }

        public static bool KeyHit(Keys button)
        {
            return (GameMain.WindowActive && oldKeyboardState.IsKeyDown(button) && keyboardState.IsKeyUp(button));
        }

        public static bool KeyDown(Keys button)
        {
            return (GameMain.WindowActive && keyboardState.IsKeyDown(button));
        }

        public static bool KeyUp(Keys button)
        {
            return GameMain.WindowActive && keyboardState.IsKeyUp(button);
        }

        public static void Update(double deltaTime)
        {
            timeSinceClick += deltaTime;

            oldMouseState = mouseState;
            mouseState = latestMouseState;
            UpdateVariable();

            oldKeyboardState = keyboardState;
            keyboardState = Keyboard.GetState();

            doubleClicked = false;
            if (LeftButtonClicked())
            {
                if (timeSinceClick < doubleClickDelay) doubleClicked = true;
                timeSinceClick = 0.0;
            }
        }

        public static void UpdateVariable()
        {
            //do NOT use this for actual interaction with the game, this is to be used for debugging and rendering ONLY

            latestMouseState = Mouse.GetState();
        }
    }
}