package shootergame.input;

import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.util.ArrayList;

import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWJoystickCallbackI;

import mainloop.task.IMainloopTask;
import shootergame.Main;

public class JoystickCallback implements GLFWJoystickCallbackI, IMainloopTask
{
	public static final JoystickCallback JOYSTICK_CALLBACK = new JoystickCallback();
	private ArrayList<Integer> connections = new ArrayList<Integer>();

	@Override
	public void invoke(int jid, int event)
	{
		// Gamepad connect
		if(event == GLFW.GLFW_CONNECTED)
		{
			// Log the event and add the connection
			System.out.println("Gamepad "+jid+" connected");
			connections.add(jid);
		}
		
		// Gamepad disconnect
		else if(event == GLFW.GLFW_DISCONNECTED)
		{
			// Log the event
			System.out.println("Gamepad "+jid+" disconnected");
			
			// Loop over the connections
			for(int i=0;i<connections.size();i++)
			{
				// Is this connection the connection that disconnected
				if(connections.get(i).intValue() == jid)
				{
					// Remove the connection and reduce i
					connections.remove(i);
					i -= 1;
				}
			}
		}
	}
	
	public void init()
	{
		// Loop over all the gamepads
		for(int i=0;i<=GLFW.GLFW_JOYSTICK_LAST;i++)
		{
			// Is this gamepad present; add the gamepad
			if(GLFW.glfwJoystickPresent(i)) {
				if(GLFW.glfwJoystickIsGamepad(i)) {
					System.out.println("Gamepad "+i+" connected");
					connections.add(i);
				}
			}
		}
	}

	@Override
	public boolean MainLoopDelay(long millis) {
		return millis > 10;
	}

	@Override
	public boolean MainLoopRepeat() {
		return true;
	}
	
	private float combineJoystickAxis(float a, float b)
	{
		if(b > 0.2 || b < -0.2) a += b;
		return a;
	}

	@Override
	public void MainLoopUpdate()
	{
		
		
		// Gamepad properties
		float left_x = 0;
		float left_y = 0;
		float left_trigger = 0;
		float right_x = 0;
		float right_y = 0;
		float right_trigger = 0;
		boolean left_stick_button = false;
		boolean right_stick_button = false;
		boolean button_a = false;
		boolean button_b = false;
		boolean button_x = false;
		boolean button_y = false;
		boolean button_start = false;
		boolean button_back = false;
		boolean button_home = false;
		boolean dpad_up = false;
		boolean dpad_down = false;
		boolean dpad_left = false;
		boolean dpad_right = false;
		boolean shoulder_left = false;
		boolean shoulder_right = false;
		
		// Loop over all the connected gamepads
		for(int jid : connections)
		{
			// Get all the axes
			FloatBuffer axes = GLFW.glfwGetJoystickAxes(jid);
			
			// Store all the axes data
			left_x = combineJoystickAxis(left_x, axes.get(0));
			left_y = combineJoystickAxis(left_y, axes.get(1));
			right_x = combineJoystickAxis(right_x, axes.get(3));
			right_y = combineJoystickAxis(right_y, axes.get(4));
			left_trigger = combineJoystickAxis(left_trigger, axes.get(2));
			right_trigger = combineJoystickAxis(right_trigger, axes.get(5));
			
			// Get all the buttons
			ByteBuffer buttons = GLFW.glfwGetJoystickButtons(jid);
			
			// Store all the button data
			button_a = buttons.get(0) == 1 || button_a;
			button_b = buttons.get(1) == 1 || button_b;
			button_x = buttons.get(2) == 1 || button_x;
			button_y = buttons.get(3) == 1 || button_y;
			shoulder_left = buttons.get(4) == 1 || shoulder_left;
			shoulder_right = buttons.get(5) == 1 || shoulder_right;
			button_back = buttons.get(6) == 1 || button_back;
			button_start = buttons.get(7) == 1 || button_start;
			button_home = buttons.get(8) == 1 || button_home;
			left_stick_button = buttons.get(9) == 1 || left_stick_button;
			right_stick_button = buttons.get(10) == 1 || right_stick_button;
			dpad_left = buttons.get(11) == 1 || buttons.get(18) == 1 || dpad_left;
			dpad_right = buttons.get(12) == 1 || buttons.get(16) == 1 || dpad_right;
			dpad_up = buttons.get(13) == 1 || buttons.get(15) == 1 || dpad_up;
			dpad_down = buttons.get(14) == 1 || buttons.get(17) == 1 || dpad_down;
		}
		
		// Is the left stick moved into a position (movement stick)
		if(left_x > 0.3 || left_x < -0.3 || left_y > 0.3 || left_y < -0.3)
		{
			// Get the the angle
			double angle = Math.toDegrees(Math.atan2(left_y, left_x)) + 90;
			
			// Move the player in the left sticks angle
			Main.player.angle += angle;
			Main.player.moveForward();
			Main.player.angle -= angle;
			
			// Set the players moving to true
			Main.player.moving = true;
		}
		
		// Set the players moving to false
		else Main.player.moving = false;
		
		// Is the right x axis stick moved into a position (camera stick)
		if(right_x > 0.3 || right_x < -0.3) {
			Main.player.angle += right_x;
		}
		
		// Gun trigger
		if(right_trigger > 0.3) {
			Main.player.fireBullet(0);
		}
		
		if(dpad_up) {
			Main.player.fireBullet(0);
		}
		
		if(dpad_down) {
			Main.player.fireBullet(180);
		}
		
		if(dpad_left) {
			Main.player.fireBullet(270);
		}
		
		if(dpad_right) {
			Main.player.fireBullet(90);
		}
	}

}