using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace BulletHellTemplate
{
    /// <summary>
    /// Spawns boxes at defined intervals within a specified area, avoiding obstacles with certain tags.
    /// </summary>
    public class BoxSpawner : MonoBehaviour
    {
        [Header("Spawner Settings")]
        public int maxBoxes = 5; // Maximum number of boxes to maintain in the scene
        public float spawnCooldown = 5f; // Cooldown in seconds between spawns
        public GameObject boxPrefab; // Prefab of the BoxEntity to spawn
        public float spawnRadius = 10f; // Radius within which boxes can be spawned

        private List<GameObject> currentBoxes = new List<GameObject>(); // List to keep track of spawned boxes
        private float cooldownTimer; // Timer to track cooldown between spawns

        void Start()
        {
            cooldownTimer = spawnCooldown;
        }

        void Update()
        {
            // Do not update the spawner if the game is paused
            if (GameplayManager.Singleton.IsPaused())
                return;

            cooldownTimer -= Time.deltaTime;

            // Check if it's time to spawn a new box and if the max number hasn't been reached
            if (cooldownTimer <= 0 && currentBoxes.Count < maxBoxes)
            {
                SpawnBox();
                cooldownTimer = spawnCooldown; // Reset cooldown timer
            }

            // Clean up null entries if boxes have been destroyed
            currentBoxes.RemoveAll(box => box == null);
        }

        /// <summary>
        /// Spawns a box at a random position within the spawn radius, avoiding walls.
        /// </summary>
        private void SpawnBox()
        {
            Vector3 spawnPoint = Vector3.zero;
            bool validPlacement = false;

            // Attempt to find a valid spawn location
            for (int attempts = 0; attempts < 10; attempts++) // Limit attempts to avoid infinite loops
            {
                spawnPoint = transform.position + Random.insideUnitSphere * spawnRadius;
                spawnPoint.y = transform.position.y; // Adjust spawn height to match the spawner's y position

                // Check for proximity to walls
                if (!Physics.CheckSphere(spawnPoint, 0.3f, LayerMask.GetMask("Wall")))
                {
                    validPlacement = true;
                    break;
                }
            }

            if (validPlacement)
            {
                GameObject newBox = Instantiate(boxPrefab, spawnPoint, Quaternion.identity);
                currentBoxes.Add(newBox);
            }
            else
            {
                Debug.LogWarning("Failed to find a valid placement for the box after several attempts.");
            }
        }

        private void OnDrawGizmos()
        {
            Gizmos.color = Color.blue;
            Gizmos.DrawWireSphere(transform.position, spawnRadius);
        }
    }
}