using Invector.vCharacterController.AI.FSMBehaviour;
using UnityEngine;

namespace ArcherEnemy
{
	/// <summary>
	/// State action that makes archer flee/retreat from player
	/// Moves archer away from player while trying to maintain shooting distance
	/// </summary>
	[CreateAssetMenu(menuName = "Invector/FSM/Actions/Archer/Flee From Player")]
	public class SA_FleeFromPlayer : vStateAction
	{
		public override string categoryName => "Archer/Combat";
		public override string defaultName => "Flee From Player";

		[Header("Flee Configuration")]
		[Tooltip("Desired safe distance from player")]
		public float safeDistance = 12f;

		[Tooltip("How far to look ahead when fleeing")]
		public float fleeDistance = 5f;

		[Tooltip("Check for obstacles when fleeing")]
		public bool avoidObstacles = true;

		[Tooltip("Layers considered as obstacles")]
		public LayerMask obstacleMask = -1;

		[Tooltip("Number of directions to try when finding flee path")]
		public int directionSamples = 8;

		[Header("Movement")]
		[Tooltip("Movement speed multiplier (uses AI's speed)")]
		[Range(0.5f, 2f)]
		public float speedMultiplier = 1.2f;

		[Tooltip("Make archer sprint while fleeing")]
		public bool useSprint = true;

		[Header("Rotation")]
		[Tooltip("Keep facing player while backing away")]
		public bool facePlayer = true;

		[Tooltip("Rotation speed when facing player (degrees/sec)")]
		public float turnSpeed = 180f;

		[Header("Debug")]
		[Tooltip("Enable debug logging")]
		public bool enableDebug = false;

		[Tooltip("Show flee direction gizmos")]
		public bool showGizmos = true;

		private Vector3 currentFleeDirection;
		private Transform currentTarget;

		public override void DoAction(vIFSMBehaviourController fsmBehaviour, vFSMComponentExecutionType executionType = vFSMComponentExecutionType.OnStateUpdate)
		{
			if (executionType == vFSMComponentExecutionType.OnStateEnter)
			{
				OnEnter(fsmBehaviour);
			}
			else if (executionType == vFSMComponentExecutionType.OnStateUpdate)
			{
				OnUpdate(fsmBehaviour);
			}
			else if (executionType == vFSMComponentExecutionType.OnStateExit)
			{
				OnExit(fsmBehaviour);
			}
		}

		private void OnEnter(vIFSMBehaviourController fsmBehaviour)
		{
			currentTarget = GetTarget(fsmBehaviour);

			if (currentTarget == null)
			{
				if (enableDebug) Debug.LogWarning("[SA_FleeFromPlayer] No target found!");
				return;
			}

			// Calculate initial flee direction
			currentFleeDirection = CalculateFleeDirection(fsmBehaviour);

			// Set AI to sprint if enabled
			var aiController = fsmBehaviour as Invector.vCharacterController.AI.vIControlAI;
			if (aiController != null && useSprint)
			{
			}

			if (enableDebug) Debug.Log("[SA_FleeFromPlayer] Started fleeing from player");
		}

		private void OnUpdate(vIFSMBehaviourController fsmBehaviour)
		{
			if (currentTarget == null)
			{
				currentTarget = GetTarget(fsmBehaviour);
				if (currentTarget == null) return;
			}

			// Recalculate flee direction periodically
			currentFleeDirection = CalculateFleeDirection(fsmBehaviour);

			// Move in flee direction
			MoveInDirection(fsmBehaviour, currentFleeDirection);

			// Face player while fleeing if enabled
			if (facePlayer)
			{
				RotateTowardsPlayer(fsmBehaviour);
			}
		}

		private void OnExit(vIFSMBehaviourController fsmBehaviour)
		{
			// Reset AI speed
			var aiController = fsmBehaviour as Invector.vCharacterController.AI.vIControlAI;
			if (aiController != null)
			{
			}

			if (enableDebug) Debug.Log("[SA_FleeFromPlayer] Stopped fleeing");
		}

		/// <summary>
		/// Calculates the best direction to flee
		/// </summary>
		private Vector3 CalculateFleeDirection(vIFSMBehaviourController fsmBehaviour)
		{
			Vector3 archerPos = fsmBehaviour.transform.position;
			Vector3 playerPos = currentTarget.position;

			// Basic flee direction: away from player
			Vector3 awayFromPlayer = (archerPos - playerPos).normalized;

			// If not avoiding obstacles, return simple direction
			if (!avoidObstacles)
			{
				return awayFromPlayer;
			}

			// Try to find clear path
			Vector3 bestDirection = awayFromPlayer;
			float bestScore = EvaluateDirection(archerPos, awayFromPlayer, playerPos);

			// Sample multiple directions around the flee vector
			for (int i = 0; i < directionSamples; i++)
			{
				float angle = (360f / directionSamples) * i;
				Vector3 testDirection = Quaternion.Euler(0f, angle, 0f) * awayFromPlayer;
				float score = EvaluateDirection(archerPos, testDirection, playerPos);

				if (score > bestScore)
				{
					bestScore = score;
					bestDirection = testDirection;
				}
			}

			return bestDirection;
		}

		/// <summary>
		/// Evaluates how good a flee direction is (higher = better)
		/// </summary>
		private float EvaluateDirection(Vector3 from, Vector3 direction, Vector3 playerPos)
		{
			float score = 0f;

			// Check if path is clear
			Ray ray = new Ray(from + Vector3.up * 0.5f, direction);
			bool isBlocked = Physics.Raycast(ray, fleeDistance, obstacleMask, QueryTriggerInteraction.Ignore);

			if (!isBlocked)
			{
				score += 10f; // Big bonus for clear path
			}

			// Prefer directions that move away from player
			Vector3 awayFromPlayer = (from - playerPos).normalized;
			float alignment = Vector3.Dot(direction, awayFromPlayer);
			score += alignment * 5f;

			// Check destination height (avoid running off cliffs)
			Vector3 destination = from + direction * fleeDistance;
			if (Physics.Raycast(destination + Vector3.up * 2f, Vector3.down, 5f, obstacleMask))
			{
				score += 3f; // Bonus for having ground
			}

			return score;
		}

		/// <summary>
		/// Moves archer in specified direction
		/// </summary>
		private void MoveInDirection(vIFSMBehaviourController fsmBehaviour, Vector3 direction)
		{
			var aiController = fsmBehaviour as Invector.vCharacterController.AI.vIControlAI;

			if (aiController == null) return;

			// Calculate destination point
			Vector3 destination = fsmBehaviour.transform.position + direction * fleeDistance;

			// Use Invector's AI movement
			aiController.MoveTo(destination);

			// Apply speed multiplier
			var motor = aiController as Invector.vCharacterController.AI.vSimpleMeleeAI_Controller;
			if (motor != null)
			{
				// This would need to be adapted to your specific Invector version
				// The goal is to make the archer move faster while fleeing
			}
		}

		/// <summary>
		/// Rotates archer to face player while backing away
		/// </summary>
		private void RotateTowardsPlayer(vIFSMBehaviourController fsmBehaviour)
		{
			if (currentTarget == null) return;

			Vector3 directionToPlayer = (currentTarget.position - fsmBehaviour.transform.position);
			directionToPlayer.y = 0f;

			if (directionToPlayer.sqrMagnitude > 0.001f)
			{
				Quaternion targetRotation = Quaternion.LookRotation(directionToPlayer);
				fsmBehaviour.transform.rotation = Quaternion.RotateTowards(
					fsmBehaviour.transform.rotation,
					targetRotation,
					turnSpeed * Time.deltaTime
				);
			}
		}

		private Transform GetTarget(vIFSMBehaviourController fsmBehaviour)
		{
			// Try through AI controller
			var aiController = fsmBehaviour as Invector.vCharacterController.AI.vIControlAI;
			if (aiController != null && aiController.currentTarget != null)
				return aiController.currentTarget.transform;

			// Fallback - find player
			GameObject player = GameObject.FindGameObjectWithTag("Player");
			return player?.transform;
		}

#if UNITY_EDITOR

		private void OnDrawGizmosSelected()
		{
			if (!showGizmos || !Application.isPlaying) return;

			// Draw current flee direction
			if (currentFleeDirection != Vector3.zero)
			{
				Gizmos.color = Color.red;
				// This would need the archer's position to draw properly
			}
		}

#endif
	}
}