using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;

namespace EvilSatellites
{
    public class VibrationManager
    {
        private PlayerIndex playerIndex;
        List<Vibration> vibrations = new List<Vibration>();

        public VibrationManager(PlayerIndex playerIndex)
        {
            this.playerIndex = playerIndex;
        }

        public void AddVibration(float leftMotor, float rightMotor, float durationMS)
        {
            vibrations.Add(new Vibration(leftMotor, rightMotor, durationMS));
        }

        public void Update(float msElapsed)
        {
            List<Vibration> toDelete = new List<Vibration>();

            foreach (Vibration vibration in vibrations)
            {
                vibration.MSLeft -= msElapsed;

                if (vibration.MSLeft < 0.0f)
                {
                    toDelete.Add(vibration);
                }
            }

            foreach (Vibration vibration in toDelete)
            {
                vibrations.Remove(vibration);
            }

            float leftMotor;
            float rightMotor;

            GetVibration(out leftMotor, out rightMotor);

            GamePad.SetVibration(playerIndex, leftMotor, rightMotor);
        }

        public void GetVibration(out float leftMotor, out float rightMotor)
        {
            leftMotor = 0.0f;
            rightMotor = 0.0f;

            foreach (Vibration vibration in vibrations)
            {
                leftMotor = Math.Max(leftMotor, vibration.LeftMotor);
                rightMotor = Math.Max(rightMotor, vibration.RightMotor);
            }
        }
    }
}