Space-Smash-Out/Assets/Scripts/Managers/PlayerManager.cs

using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using log4net;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Managers
{

	/// <summary>
	/// Handles setting up and managing all local players.
	/// </summary>
	public class PlayerManager : MonoBehaviour
	{
		private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

		/// <summary>
		/// Globally accessible member to use manager with.
		/// </summary>
		public static PlayerManager G { get; private set; }

		/// <summary>
		/// The player which has started/owns the game.
		/// May be identified at the start of the game and not 
		/// to be changed.
		/// </summary>
		public Player OnlinePlayer { get; private set; }

		/// <summary>
		/// List of the players currently playing the game.
		/// </summary>
		public List<Player> MatchPlayers { get; private set; } = new List<Player>();

		[SerializeReference]
		private CameraOperator cameraOperator;

		void Awake()
		{
			G = this;
			Log.Info("Awake");
		}

		/// <summary>
		/// Create the minimum number of players for the match and
		/// add them to the player list.
		/// </summary>
		/// <param name="minPlayers">Minimum number of players</param>
		public void LocalMatchJoinPlayers(int minPlayers, int maxPlayers)
		{
			if (MatchPlayers.Count < minPlayers)
			{
				for (int i = MatchPlayers.Count; i < minPlayers; ++i)
				{
					CreateLocalPlayer(i + 1);
				}
			}
			if (MatchPlayers.Count > maxPlayers)
			{
				MatchPlayers.RemoveRange(maxPlayers, MatchPlayers.Count - maxPlayers);
			}
		}

		/// <summary>
		/// Creates a new player for this local session.
		/// </summary>
		/// <param name="id">Number of the player</param>
		/// <returns>The created player or null if the number was already choosen.</returns>
		private Player CreateLocalPlayer(int id)
		{
			if (MatchPlayers.Any(p => p.playerNumber == id))
			{
				Log.Warn($"The local player with the number: {id}, already exists!");
				return null;
			}
			Player player = ScriptableObject.CreateInstance<Player>();
			player.playerNumber = id;
			player.playerName = $"Player {id}";
			MatchPlayers.Add(player);
			Log.Debug($"Added player number {id}.");
			return player;
		}

		/// <summary>
		/// When playing online there is only one player per client.
		/// TODO: No online syncronization at this point yet.
		/// Just the spawned character/ships are syncronized.
		/// </summary>
		public void LoadOnlinePlayer()
		{
			Player player = ScriptableObject.CreateInstance<Player>();
			player.playerNumber = 1;
			player.playerName = $"Player {1}";
			MatchPlayers.Add(player);
			Log.Debug($"Added player number {1}.");
			OnlinePlayer = player;
			MatchPlayers = new List<Player>() { OnlinePlayer };
		}


		public void OnPlayerJoined(PlayerInput pi)
		{
			cameraOperator.AddCharacter(pi.gameObject);
		}
	}

}