using System;
using System.Collections.Generic;
using System.Timers;
using Timer = System.Timers.Timer;
namespace BITKit
{
    public enum PlayerState
    {
        None,
        Playing,
        Paused,
    }
    public enum PlayerType
    {
        None,
        Player,
        Recorder,
    }
    public interface IPlayer<TSource>
    {
        void Start();
        void Pause();
        void Stop();
        int GetIndex();
        float GetTime();
        void SetIndex(int index);
        void SetTime(float time);
        PlayerState GetPlayState();
    }
    public class Player<T>
    {
        public int frameRate = 30;
        public PlayerState state;
        protected List<T> list = new();
        public bool isPlaying;
        public event Action onStart;
        public event Action onStop;
        protected T current;
        Timer timer = new() { AutoReset = true };
        public void Start()
        {
            if (isPlaying is false)
            {
                list ??= new();
                timer ??= new();
                isPlaying = true;
                timer.Interval = TimeSpan.FromSeconds(1f / (float)frameRate).Milliseconds;
                timer.Elapsed += Update;
                timer.Start();
                state = PlayerState.Playing;
                OnStart();
                onStart?.Invoke();
            }
        }
        public void Stop()
        {
            if (isPlaying)
            {
                timer.Stop();
                timer.Elapsed -= Update;
                isPlaying = false;
                state = 0;
                OnStop();
                onStop?.Invoke();
            }
        }
        public void Cancel()
        {
            timer?.Stop();
            list?.Clear();
            onStop?.Invoke();
            timer = null;
            isPlaying = false;
            state = 0;
        }
        public void PlayOrPause()
        {
            switch (state)
            {
                case PlayerState.None:
                    Start();
                    break;
                case PlayerState.Playing:
                    state = PlayerState.Paused;
                    break;
                case PlayerState.Paused:
                    state = PlayerState.Playing;
                    break;
            }
        }
        public void Set(T t)
        {
            current = t;
        }
        void Update(object sender, ElapsedEventArgs e)
        {
            OnUpdate();
        }
        protected virtual void OnUpdate() { }
        protected virtual void OnStart() { }
        protected virtual void OnStop() { }
    }
}