using System;
using System.Drawing;
using System.Collections.Generic;

public static class VoiceBotScript
{
	private const string ScriptSettingName = "relative_position_driving_mode";
	
	// The threshold of the mouse movement, in pixels
	private const int Threshold = 5;
	
	// The speed at which the script runs. Each loop will wait for
	// this many milliseconds (250 is 4 times a second)
	private const int IntervalMS = 250;
	
	// An enum to help keep track of the direction
	private enum DirectionEnum
	{
		None = 0,
		Left = 1,
		Right = 2		
	}
	
	// A dictionary to map the direction to the key. For Left/Right arrow use "{LEFT}" and "{RIGHT}", for
	// A and D use "A" and "D"
	private static Dictionary<DirectionEnum, string> KeyMap = new Dictionary<DirectionEnum, string>()
	{
		{DirectionEnum.Left, "A"},
		{DirectionEnum.Right, "D"},
	};
	
	private static DirectionEnum CurrentDirection = DirectionEnum.None;
	private static int LastMousePosition = 0;
	
	public static void Run(IntPtr windowHandle)
	{
		// If the script is running, this will set the script to
		// stop running, and then exit
		if (BFS.ScriptSettings.ReadValueBool(ScriptSettingName))
		{
			BFS.ScriptSettings.WriteValueBool(ScriptSettingName, false);
			return;
		}
			
		// If we got this far, that means the script is running
		BFS.ScriptSettings.WriteValueBool(ScriptSettingName, true);
        
		// Setup our initial values
		LastMousePosition = BFS.Input.GetMousePositionX();
		
		// Run the loop while the script should be running
		while (BFS.ScriptSettings.ReadValueBool(ScriptSettingName))
		{
            // Check how far the mouse is now
			int x = BFS.Input.GetMousePositionX();			
			int delta = x - LastMousePosition;
			
			// The mouse didn't move enough. Let go of any keys and continue
			if(Math.Abs(delta) < Threshold)
			{
				// Let go of any held down keys
				if(CurrentDirection != DirectionEnum.None)
					BFS.Input.SendKeyUp(KeyMap[CurrentDirection]);
				
				// Update the values
				CurrentDirection = DirectionEnum.None;
				LastMousePosition = x;
				
				// Wait for the specified time
				BFS.General.ThreadWait(IntervalMS);
				continue;
			}
			
			// The mouse moved left
			if(delta < 0)
			{				
				// If no keys are pressed just press the left key
				if(CurrentDirection == DirectionEnum.None)
					BFS.Input.SendKeyDown(KeyMap[DirectionEnum.Left]);
								
				// If the right key is held down let it go and press the left key
				if(CurrentDirection == DirectionEnum.Right)
				{
					BFS.Input.SendKeyUp(KeyMap[DirectionEnum.Right]);
					BFS.Input.SendKeyDown(KeyMap[DirectionEnum.Left]);
				}
				
				// Keep track of the pressed key
				CurrentDirection = DirectionEnum.Left;
			}
			
			// The mouse moved right
			if(delta > 0)
			{				
				// If no keys are pressed just press the right key
				if(CurrentDirection == DirectionEnum.None)
					BFS.Input.SendKeyDown(KeyMap[DirectionEnum.Right]);
				
				// If the left key is held down let it go and press the right key
				if(CurrentDirection == DirectionEnum.Left)
				{
					BFS.Input.SendKeyUp(KeyMap[DirectionEnum.Left]);
					BFS.Input.SendKeyDown(KeyMap[DirectionEnum.Right]);
				}
				
				// Keep track of the pressed key
				CurrentDirection = DirectionEnum.Right;
			}
			
			// Update the values
			LastMousePosition = x;
			
			// Wait for the specified time
			BFS.General.ThreadWait(IntervalMS);
		}
		
		// If we got this far that means the script has ended
		// Let go of any held down keys
		if(CurrentDirection != DirectionEnum.None)
			BFS.Input.SendKeyUp(KeyMap[CurrentDirection]);
		
		// Update the values
		CurrentDirection = DirectionEnum.None;
	}
}