using UnityEngine;
using UnityEngine.AI;

// ALWAYS validate positions before navigation
public bool TryGetValidNavMeshPosition(Vector3 target, out Vector3 validPosition, float maxDistance = 2f)
{
    if (NavMesh.SamplePosition(target, out NavMeshHit hit, maxDistance, NavMesh.AllAreas))
    {
        validPosition = hit.position;
        return true;
    }
    validPosition = Vector3.zero;
    return false;
}

// Find lootable objects within radius
private readonly Collider[] _scanBuffer = new Collider[64];

public void ScanForLoot(Vector3 position, float radius, int layerMask)
{
    int count = Physics.OverlapSphereNonAlloc(position, radius, _scanBuffer, layerMask);
    for (int i = 0; i < count; i++)
    {
        var collider = _scanBuffer[i];
        // Process collider.gameObject
    }
}

// Prefer sqrMagnitude for distance comparisons (avoids sqrt)
float distanceSq = (targetPos - botPos).sqrMagnitude;
if (distanceSq < maxDistanceSq) // Compare squared values
{
    Vector3 direction = (targetPos - botPos).normalized;
    // Use direction for facing/movement
}

public Vector3 CalculateSpawnPosition(Transform playerTransform, float distance = 15f)
{
    // Spawn behind and slightly offset
    Vector3 behindPlayer = playerTransform.position - playerTransform.forward * distance;
    
    if (TryGetValidNavMeshPosition(behindPlayer, out Vector3 validPos))
        return validPos;
    
    // Fallback: try sides
    Vector3 leftPos = playerTransform.position - playerTransform.right * distance;
    if (TryGetValidNavMeshPosition(leftPos, out validPos))
        return validPos;
        
    return playerTransform.position; // Last resort
}

private IEnumerator HealOverTime(float totalAmount, float duration)
{
    float elapsed = 0f;
    float healPerSecond = totalAmount / duration;
    
    while (elapsed < duration)
    {
        ApplyHealing(healPerSecond * Time.deltaTime);
        elapsed += Time.deltaTime;
        yield return null; // Wait one frame
    }
}