using UnityEngine;

public class BatSwarmMovement : MonoBehaviour
{
    [Header("Movement Settings")]
    [SerializeField] private float radius = 2f;            // Radius of the circular movement
    [SerializeField] private float verticalAmount = 1.5f;  // Amount of vertical movement
    [SerializeField] private float rotationSpeed = 2f;     // Base rotation speed
    [SerializeField] private float bobSpeed = 1.5f;        // Speed of up/down movement

    [Header("Chaos Settings")]
    [SerializeField] private float chaosAmount = 0.5f;     // Amount of random movement
    [SerializeField] private float timeVariance = 0.5f;    // Variance in timing

    private Vector3 startPosition;
    private float individualOffset;
    private float verticalOffset;
    private float rotationOffset;

    private void Start()
    {
        // Store the initial position
        startPosition = transform.position;

        // Generate random offsets for this specific bat
        individualOffset = Random.Range(0f, 2f * Mathf.PI);
        verticalOffset = Random.Range(0f, 2f * Mathf.PI);
        rotationOffset = Random.Range(-0.5f, 0.5f);
    }

    private void Update()
    {
        float time = Time.time;

        // Calculate base circular movement
        float adjustedTime = time * rotationSpeed + individualOffset;
        float x = Mathf.Cos(adjustedTime) * radius;
        float z = Mathf.Sin(adjustedTime) * radius;

        // Add vertical movement using a different frequency
        float verticalMovement = Mathf.Sin(time * bobSpeed + verticalOffset) * verticalAmount;

        // Add chaos to the movement
        float chaosX = Mathf.PerlinNoise(time + individualOffset, 0f) * chaosAmount;
        float chaosY = Mathf.PerlinNoise(0f, time + individualOffset) * chaosAmount;
        float chaosZ = Mathf.PerlinNoise(time + verticalOffset, time + individualOffset) * chaosAmount;

        // Combine all movements
        Vector3 newPosition = startPosition + new Vector3(
            x + chaosX,
            verticalMovement + chaosY,
            z + chaosZ
        );

        // Update position
        transform.position = newPosition;

        // Calculate forward direction for rotation
        Vector3 direction = (newPosition - transform.position).normalized;
        if (direction != Vector3.zero)
        {
            // Add some wobble to the rotation
            float rotationWobble = Mathf.Sin(time * (bobSpeed + rotationOffset)) * 15f;
            Quaternion targetRotation = Quaternion.LookRotation(direction);
            targetRotation *= Quaternion.Euler(0f, 0f, rotationWobble);

            // Smoothly rotate towards the direction of movement
            transform.rotation = Quaternion.Slerp(
                transform.rotation,
                targetRotation,
                Time.deltaTime * 5f
            );
        }

        transform.LookAt(transform.parent);
    }

    // Optional: Visualize the movement radius in the editor
    private void OnDrawGizmosSelected()
    {
        Gizmos.color = Color.yellow;
        Gizmos.DrawWireSphere(transform.position, radius);
    }
}