using System.Collections;
using Unity.BossRoom.Gameplay.GameplayObjects.Character;
using Unity.Netcode;
using UnityEngine;

[RequireComponent(typeof(NetworkObject))]
public class MeteorStrikeEffect : NetworkBehaviour
{
    [Header("Meteor Shower Settings")]
    [Tooltip("Prefab of a single meteor. Must have Collider + (optionally) Rigidbody + NetworkObject if you want networked meteors.")]
    public GameObject meteorPrefab;

    [Tooltip("Number of meteors to spawn over the duration.")]
    public int meteorCount = 10;

    [Tooltip("Total time (in seconds) over which meteors will fall.")]
    public float strikeDuration = 3f;

    [Tooltip("Horizontal radius (XZ plane) around this object's position where meteors will land.")]
    public float strikeRadius = 10f;

    [Tooltip("Vertical offset above this object's position from which meteors spawn.")]
    public float spawnHeight = 20f;

    [Tooltip("If checked, the shower will start automatically on network spawn.")]
    public bool startOnAwake = true;

    private Coroutine _showerRoutine;

    public override void OnNetworkSpawn()
    {
        // Only run on the server
        if (!IsServer) return;

        if (startOnAwake)
        {
            StartShower();
        }
    }

    /// <summary>
    /// Public method to kick off the meteor shower at this GameObject's position.
    /// </summary>
    public void StartShower()
    {
        if (!IsServer) return;

        if (_showerRoutine != null)
            StopCoroutine(_showerRoutine);

        _showerRoutine = StartCoroutine(ShowerCoroutine());
    }

    private IEnumerator ShowerCoroutine()
    {
        float interval = strikeDuration / Mathf.Max(1, meteorCount);
        Vector3 center = transform.position;

        for (int i = 0; i < meteorCount; i++)
        {
            // pick a random landing point in the XZ circle
            Vector2 offset = Random.insideUnitCircle * strikeRadius;
            Vector3 spawnPos = new Vector3(
                center.x + offset.x,
                center.y + spawnHeight,
                center.z + offset.y
            );

            // instantiate the meteor
            var go = Instantiate(meteorPrefab, spawnPos, Quaternion.identity);

            // if it has a NetworkObject, spawn it on clients
            if (go.TryGetComponent<NetworkObject>(out var netObj))
            {
                netObj.Spawn(true);
            }
            else
            {
                // otherwise ensure it falls via physics
                var rb = go.GetComponent<Rigidbody>() ?? go.AddComponent<Rigidbody>();
                rb.useGravity = true;
            }

            // attach our collision-forwarder
            var mb = go.AddComponent<MeteorBehavior>();
            mb.controller = this;

            yield return new WaitForSeconds(interval);
        }
    }

    /// <summary>
    /// Override this in a subclass or add logic here to handle when a meteor hits something.
    /// </summary>
    /// <param name="hitObject">The object struck by the meteor.</param>
    protected virtual void OnHit(GameObject hitObject)
    {
        Debug.Log($"[Server] Meteor hit: {hitObject.name}");
        // TODO: your custom hit logic here
    }

    private void OnDrawGizmosSelected()
    {
        // visualize the landing radius in the editor
        Gizmos.matrix = transform.localToWorldMatrix;
        Gizmos.DrawWireSphere(Vector3.zero, strikeRadius);
    }

    /// <summary>
    /// Internal helper attached to each spawned meteor to forward collisions.
    /// </summary>
    private class MeteorBehavior : MonoBehaviour
    {
        [HideInInspector] public MeteorStrikeEffect controller;

        private void OnCollisionEnter(Collision collision)
        {
            if (controller != null && controller.IsServer)
            {
                controller.OnHit(collision.gameObject);
            }
            Destroy(gameObject);
        }
    }
}