using System;
using System.Drawing;
using System.Windows.Forms;
using WindowsInput.Native;
using System.Collections.Generic;

namespace WindowsInputSimulator
{
	class InputSimulator
	{
		private Size screen;
		private const int max = 65535;
		private WindowsInput.InputSimulator input = new WindowsInput.InputSimulator();

		public InputSimulator()
		{
			this.screen = GetMaxSize();
		}

		//http://msdn.microsoft.com/en-us/library/dd375731(VS.85).aspx
		public void KeyPress(VirtualKeyCode keyCode, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.KeyPress(keyCode);
		}

		public void KeyDown(VirtualKeyCode keyCode, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.KeyDown(keyCode);
		}

		public void KeyUp(VirtualKeyCode keyCode, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.KeyUp(keyCode);
		}

		public void TextEntry(string text, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.TextEntry(text);
		}

		public void TextEntry(char chr, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.TextEntry(chr);
		}

		public void ModifiedKeyStroke(VirtualKeyCode modifierKeyCode, VirtualKeyCode keyCode, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.ModifiedKeyStroke(modifierKeyCode, keyCode);
		}

		public void ModifiedKeyStroke(IEnumerable<VirtualKeyCode> modifierKeyCodes, IEnumerable<VirtualKeyCode> keyCodes, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.ModifiedKeyStroke(modifierKeyCodes, keyCodes);
		}

		public void ModifiedKeyStroke(VirtualKeyCode modifierKeyCode, IEnumerable<VirtualKeyCode> keyCodes, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.ModifiedKeyStroke(modifierKeyCode, keyCodes);
		}

		public void ModifiedKeyStroke(IEnumerable<VirtualKeyCode> modifierKeyCodes, VirtualKeyCode keyCode, int delay = 0)
		{
			if (delay > 0)
				this.input.Keyboard.Sleep(delay);
			this.input.Keyboard.ModifiedKeyStroke(modifierKeyCodes, keyCode);
		}

		public void MoveMouseTo(int x, int y, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.MoveMouseToPositionOnVirtualDesktop(AbsoluteX(x), AbsoluteY(y));
		}

		public void MoveMouseBy(int pixelDeltaX, int pixelDeltaY, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.MoveMouseBy(pixelDeltaX, pixelDeltaY);
		}

		public void XButtonClick(int buttonId, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.XButtonClick(buttonId);
		}

		public void XButtonDoubleClick(int buttonId, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.XButtonDoubleClick(buttonId);
		}

		public void XButtonDown(int buttonId, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.XButtonDown(buttonId);
		}

		public void XButtonUp(int buttonId, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.XButtonUp(buttonId);
		}

		public void HorizontalScroll(int scrollAmountInClicks, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.HorizontalScroll(scrollAmountInClicks);
		}

		public void VerticalScroll(int scrollAmountInClicks, int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.VerticalScroll(scrollAmountInClicks);
		}

		public void LeftButtonClick(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.LeftButtonClick();
		}

		public void LeftButtonDoubleClick(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.LeftButtonDoubleClick();
		}

		public void LeftButtonDown(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.LeftButtonDown();
		}

		public void LeftButtonUp(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.LeftButtonUp();
		}

		public void RightButtonDoubleClick(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.RightButtonDoubleClick();
		}

		public void RightButtonClick(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.RightButtonClick();
		}

		public void RightButtonDown(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.RightButtonDown();
		}

		public void RightButtonUp(int delay = 0)
		{
			if (delay > 0)
				this.input.Mouse.Sleep(delay);
			this.input.Mouse.RightButtonUp();
		}

		protected double AbsoluteX(int x)
		{
			return x * max / screen.Width;
		}

		protected double AbsoluteY(int y)
		{
			return y * max / screen.Height;
		}

		protected Size GetMaxSize()
		{
			Rectangle bounds;
			int left_min, top_min, right_max, bottom_max;
			left_min = 0; top_min = 0; right_max = 0; bottom_max = 0;
			foreach (var screen in Screen.AllScreens)
			{
				bounds = screen.Bounds;
				left_min = Math.Min(left_min, bounds.Left);
				right_max = Math.Max(right_max, bounds.Right);
				top_min = Math.Min(top_min, bounds.Top);
				bottom_max = Math.Max(bottom_max, bounds.Bottom);
			}
			return new Size(right_max - left_min, bottom_max - top_min);
		}
	}
}