using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using Unity.Netcode;
using UnityEngine.AI;
using GameNetcodeStuff;
using ScarletMansion.GamePatch.Components;

namespace ScarletMansion {

  public class KnightGhostVariant : EnemyAI {

	  public float maxChaseSpeed = 14.5f;
    public float slowChaseSpeed = 6f;
	  private float currentAnimSpeed = 1f;

	  public Collider mainCollider;

    public MeshRenderer[] knightMeshRenderers;

    public AudioClip[] ramAudioClips;

    public override void Start(){
      base.Start();

      if (IsOwner && KnightSpawnManager.Instance) {
        var index = KnightSpawnManager.Instance.GetSpawnPointIndex();
        if (index == -1) return;

        SyncKnightReplacementClientRpc(index);
      }
    }

	  public override void DoAIInterval() {
		  base.DoAIInterval();

      movingTowardsTargetPlayer = true;

		  if (targetPlayer == null || !targetPlayer.IsOwner) return;
      if (isEnemyDead) return;

      var targetOutOfMap = !PlayerIsTargetable(targetPlayer);
      if (targetOutOfMap){
        CallDisappear();
        return;
      }

      var targetLookingAtMe = !Physics.Linecast(transform.position + Vector3.up * 0.5f, targetPlayer.gameplayCamera.transform.position, StartOfRound.Instance.collidersAndRoomMaskAndDefault) && Vector3.Distance(base.transform.position, targetPlayer.transform.position) < 30f;
      var newBehaviourState = targetLookingAtMe ? 1 : 0;
      if (newBehaviourState != currentBehaviourStateIndex) {
        SwitchToBehaviourState(newBehaviourState);
      }
      
	  }

	  public override void Update() {
		  base.Update();
		  if (isEnemyDead) return;

      var trueSpeed = currentBehaviourStateIndex == 0 ? maxChaseSpeed : slowChaseSpeed;
      if (IsOwner) {
        agent.speed = Mathf.MoveTowards(agent.speed, trueSpeed, 4.5f * Time.deltaTime);
      }

			currentAnimSpeed = Mathf.Lerp(currentAnimSpeed, trueSpeed * 0.4597f, 4f * Time.deltaTime);
			creatureAnimator.SetFloat("walkSpeed", currentAnimSpeed);
	  }

	  public override void OnCollideWithPlayer(Collider other) {
		  base.OnCollideWithPlayer(other);

		  var playerControllerB = MeetsStandardPlayerCollisionConditions(other, false, false);
		  if (playerControllerB != null && playerControllerB.IsOwner && playerControllerB == targetPlayer) {
				var damage = ScarletNetworkManagerUtility.GetCriticalDamageToPlayer(playerControllerB, false);
			  playerControllerB.DamagePlayer(damage, true, true, CauseOfDeath.Mauling, 1, false, default(Vector3));
			  playerControllerB.JumpToFearLevel(1f, true);

        RoundManager.PlayRandomClip(creatureVoice, ramAudioClips, false, 1f, 0);

        CallDisappear();
		  }
	  }

    [ClientRpc]
    public void SyncKnightReplacementClientRpc(int index){
      Plugin.logger.LogInfo($"Spawning ghost knight at {index}");

      try {
        var target = KnightSpawnManager.Instance.GetSpawnPointTransform(index);
        target.gameObject.SetActive(false);

        transform.position = target.position;
        transform.rotation = target.rotation;
        serverPosition = target.position;

        if (agent == null) agent = GetComponentInChildren<NavMeshAgent>();
        agent.Warp(target.position);

        if (IsOwner) {
          SyncPositionToClients();
        }
      } catch (Exception e){
        Plugin.logger.LogError($"Tried to ghost knight spawn at {index}, but completely failed");
        Plugin.logger.LogError(e);
      }
    }


    public void FindAndTunnelPlayer(Vector3 searchPosition){
      var validPlayers = StartOfRound.Instance.allPlayerScripts.Where(p => p != null && PlayerIsTargetable(p));
      if (validPlayers.Count() == 0) {
        Plugin.logger.LogWarning("Could not find valid target to tunnel");
        return;
      }

      var closestPlayer = validPlayers
        .OrderBy(p => Vector3.SqrMagnitude(p.transform.position - searchPosition))
        .FirstOrDefault();

      if (closestPlayer != null) {
        ChangeOwnershipOfEnemy(closestPlayer.actualClientId);
        TunnelPlayerClientRpc(closestPlayer);
      }
    }

    [ClientRpc]
    public void TunnelPlayerClientRpc(NetworkBehaviourReference playerRef){
      if (playerRef.TryGet<PlayerControllerB>(out var player)){
        targetPlayer = player;
        Plugin.logger.LogInfo($"Targeting {player.playerUsername} for death");

        if (targetPlayer.IsOwner) return;

        // other clients will only see eyes of death
        foreach(var m in knightMeshRenderers) {
          m.enabled = false;
        }
      } else {
        Plugin.logger.LogWarning("Could not find target player through reference");
      }
    }

    private bool calledDisappear = false;
    public void CallDisappear(){
      if (calledDisappear) return;

      Plugin.logger.LogInfo("Killing ghost knight");

      calledDisappear = true;
      mainCollider.enabled = false;
      mainCollider.gameObject.SetActive(false);

      ScarletNetworkManager.Instance.CreateSpawnAudioPrefab(transform.position, targetPlayer.actualClientId);
      DisappearServerRpc();
    }

    [ServerRpc(RequireOwnership = false)]
    public void DisappearServerRpc(){
      KillEnemy(true);
    }
  }
}