using System.Collections;
using Unity.Netcode;
using UnityEngine;

public class ChaosRuneSystem : NetworkBehaviour
{
    [Header("Drop Timing (seconds)")]
    [SerializeField] private float powerUpDropInterval = 10f;

    [Header("Chaos Rune Prefabs")]
    [Tooltip("Drag your ChaosRune prefabs here (must have NetworkObject + ChaosRune).")]
    [SerializeField] private GameObject[] chaosRunePrefabs;

    [Header("Spawn Area (local to this GameObject)")]
    [Tooltip("Local offset from this GameObject’s position to the center of the spawn area.")]
    [SerializeField] private Vector3 spawnAreaCenter = Vector3.zero;
    [Tooltip("Size of the rectangle: X = width, Y = depth.")]
    [SerializeField] private Vector2 spawnAreaSize = new Vector2(20f, 20f);
    [Tooltip("Height above this GameObject’s Y-position from which runes spawn.")]
    [SerializeField] private float spawnHeight = 15f;

    public override void OnNetworkSpawn()
    {
        if (IsServer)
            StartCoroutine(DropRunesLoop());
    }

    private IEnumerator DropRunesLoop()
    {
        while (true)
        {
            yield return new WaitForSeconds(powerUpDropInterval);
            SpawnRandomRune();
        }
    }

    private void SpawnRandomRune()
    {
        if (chaosRunePrefabs == null || chaosRunePrefabs.Length == 0)
        {
            Debug.LogWarning("ChaosRuneSystem: No prefabs assigned.");
            return;
        }

        int idx = Random.Range(0, chaosRunePrefabs.Length);
        GameObject prefab = chaosRunePrefabs[idx];
        Vector3 pos = GetRandomDropPosition();

        var go = Instantiate(prefab, pos, Quaternion.identity);
        var netObj = go.GetComponent<NetworkObject>();
        if (netObj != null)
            netObj.Spawn();
        else
            Debug.LogError($"ChaosRuneSystem: Prefab '{prefab.name}' missing NetworkObject.");
    }

    private Vector3 GetRandomDropPosition()
    {
        // center in world space
        Vector3 worldCenter = transform.position + spawnAreaCenter;
        float halfW = spawnAreaSize.x * 0.5f;
        float halfD = spawnAreaSize.y * 0.5f;
        float x = worldCenter.x + Random.Range(-halfW, halfW);
        float z = worldCenter.z + Random.Range(-halfD, halfD);
        float y = transform.position.y + spawnHeight;
        return new Vector3(x, y, z);
    }

    private void OnDrawGizmosSelected()
    {
        // draw spawn area rectangle on XZ plane
        Vector3 worldCenter = transform.position + spawnAreaCenter;
        Vector3 size = new Vector3(spawnAreaSize.x, 0.1f, spawnAreaSize.y);

        Gizmos.color = Color.cyan;
        Gizmos.DrawWireCube(worldCenter, size);

        // draw vertical line & marker at spawn height
        Gizmos.color = Color.gray;
        Vector3 bottom = worldCenter;
        Vector3 top    = worldCenter + Vector3.up * spawnHeight;
        Gizmos.DrawLine(bottom, top);
        Gizmos.DrawWireSphere(top, 0.2f);
    }
}

public enum ChaosRuneType
{
    MeteorStrike,
    BoobyTrap,
    Barricade
}