using Unity.BossRoom.Gameplay.GameplayObjects.Character;
using Unity.Netcode;
using UnityEngine;

namespace Unity.Multiplayer.Samples.BossRoom
{
    [RequireComponent(typeof(Collider))]
    public class Platform : NetworkBehaviour
    {
        public int PlatformID { get; private set; }
        public bool IsOccupied{ get; private set; }

        private NetworkVariable<ulong> OccupierId = new NetworkVariable<ulong>(0, NetworkVariableReadPermission.Everyone, NetworkVariableWritePermission.Server);
        private Collider m_PlatformCollider;

        private void Awake()
        {
            m_PlatformCollider = GetComponent<Collider>();
            if (!m_PlatformCollider.isTrigger)
            {
                Debug.LogWarning($"Platform {name} collider must be set as a trigger.");
                m_PlatformCollider.isTrigger = true; // Ensure it's a trigger.
            }
        }

        public void AssignID(int id)
        {
            PlatformID = id;
            IsOccupied = false;
            Debug.Log($"Platform {name} assigned ID: {PlatformID}");
        }

        public void Occupy(ServerCharacter player)
        {
            if (!IsServer)
            {
                Debug.LogError("Occupy can only be called on the server.");
                return;
            }

            if (IsOccupied)
            {
                Debug.LogWarning($"Platform {PlatformID} is already occupied.");
                return;
            }

            IsOccupied = true;
            OccupierId.Value = player.OwnerClientId;
            player.SetOnPlatform(true);

            Debug.Log($"Platform {PlatformID} is now occupied by Player {player.OwnerClientId}.");
        }

        public void Vacate(ServerCharacter player)
        {
            if (!IsServer)
            {
                Debug.LogError("Vacate can only be called on the server.");
                return;
            }

            if (!IsOccupied || OccupierId.Value != player.OwnerClientId)
            {
                Debug.LogWarning($"Platform {PlatformID} is not occupied by Player {player.OwnerClientId}.");
                return;
            }

            IsOccupied = false;
            OccupierId.Value = 0;
            player.SetOnPlatform(false);

            Debug.Log($"Platform {PlatformID} is now vacated.");
        }

        private void OnTriggerEnter(Collider other)
        {
            if (!IsServer) return;

            if (other.TryGetComponent<ServerCharacter>(out var player))
            {
                if (!IsOccupied)
                {
                    Occupy(player);
                    player.OnArrivalOnPlatform();
                }
                else
                {
                    Debug.Log($"Player {player.OwnerClientId} attempted to occupy an already occupied Platform {PlatformID}.");
                }
            }
        }

        public ulong GetOccupierId()
        {
            return OccupierId.Value;
        }
        
        private void OnTriggerExit(Collider other)
        {
            if (!IsServer) return;

            if (other.TryGetComponent<ServerCharacter>(out var player) && OccupierId.Value == player.OwnerClientId)
            {
                Vacate(player);
                player.OnLeavingPlatform();
            }
        }
    }
}