using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using log4net;
using UnityEditor;
using UnityEngine;

namespace Managers
{
	/// <summary>
	/// Handles setting up the available character/ship options, which the players can choose from,
	/// connects them to the players when choosen and manages them (spawning, despawning etc.).
	/// </summary>
	public class CharacterManager : MonoBehaviour
	{
		private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

		/// <summary>
		/// Globally accessible member to use manager with.
		/// </summary>
		public static CharacterManager G { get; private set; }
		public List<ShipProperties> AvailableShips { get; private set; } = new List<ShipProperties>();
		private static readonly string characterAssetsBundleName = "characters";
		private static readonly string characterAssetsPath = "Assets/ScriptedAssets/Characters";

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

		void Start()
		{
			LoadAvailableCharacters();
		}

		/// <summary>
		/// Loads the characters a player can choose from a fixed path
		/// in the project.
		/// </summary>
		private void LoadAvailableCharacters()
		{
#if UNITY_EDITOR
			string[] files = Directory.GetFiles(characterAssetsPath, "*.asset",
				SearchOption.TopDirectoryOnly);
			foreach (var file in files)
			{
				AvailableShips.Add(AssetDatabase.LoadAssetAtPath<ShipProperties>(file));
			}
#else
			var characterAssetBundle = AssetBundle.LoadFromFile(Path.Combine(Application.streamingAssetsPath, characterAssetsBundleName));
			if (characterAssetBundle == null)
			{
				Log.Error("Failed to load rules asset bundle!");
				return;
			}
			AvailableShips.AddRange(characterAssetBundle.LoadAllAssets<ShipProperties>());
#endif
		}

		/// <summary>
		/// Assigns a ship to the player.
		/// Depends on the number of the player.
		/// Player number 2 always gets ship number 2 in the characters folder.
		/// </summary>
		/// <param name="p">Player</param>
		public void AssignShipFixed(Player p)
		{
			if (availableShips.Count >= p.playerNumber)
			{
				p.character = availableShips[p.playerNumber - 1];
			}
			else
			{
				Log.Error($"There was no ship assigned to player number: {p.playerNumber}" +
				" There are not enough ships to choose from.");
			}
		}
	}
}