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

namespace Gaia
{
    /// <summary>
    /// Simple Spawn Extension for demo / debug purposes. Just writes some info to the console when being executed.
    /// </summary>
    public class GeNaSpawnExtension : MonoBehaviour, ISpawnExtension
    {
        public string Name { get { return "GeNaSpawnExtension"; } }

        public bool AffectsHeights => false;

        public bool AffectsTextures => false;

        public GameObject m_genaSpawnerPrefab;
        private GeNa.Spawner m_genaSpawnerInstance;

        public void Close()
        {
            //Debug.Log("Spawn Extension is closing down.");
            if (m_genaSpawnerInstance != null)
            {
                DestroyImmediate(m_genaSpawnerInstance.gameObject);
            }
        }

        public void Init(Spawner spawner)
        {
            //Debug.Log("Spawn Extension starting up.");
            if (m_genaSpawnerPrefab == null)
            {
                Debug.LogWarning("GeNa Spawn Extension '" + Name + "' does not have a GeNa Spawner Prefab assigned.");
                return;
            }

            GameObject newGO = Instantiate(m_genaSpawnerPrefab);
            m_genaSpawnerInstance = newGO.GetComponent<GeNa.Spawner>();

            if (m_genaSpawnerInstance == null)
            {
                Debug.LogWarning("Could not find a GeNa Spawner component on the prefab for GeNa Spawn Extension '" + Name + "'. Does this prefab use a GeNa Spawner component on the top level?");
            }


        }

        public void Spawn(Spawner spawner, Transform target, int ruleIndex, int instanceIndex, SpawnExtensionInfo spawnExtensionInfo)
        {
            //Debug.Log("Spawn Extension spawning.");
            if (m_genaSpawnerInstance != null)
            {

                float scalarX = (spawnExtensionInfo.m_position.x - spawnExtensionInfo.m_currentTerrain.transform.position.x) / spawnExtensionInfo.m_currentTerrain.terrainData.size.x;
                float scalarZ = (spawnExtensionInfo.m_position.z - spawnExtensionInfo.m_currentTerrain.transform.position.z) / spawnExtensionInfo.m_currentTerrain.terrainData.size.z;
                Vector3 normal = spawnExtensionInfo.m_currentTerrain.terrainData.GetInterpolatedNormal(scalarX,scalarZ);
                m_genaSpawnerInstance.Initialise(target,"Gaia Spawn Extension Spawn",false);
                m_genaSpawnerInstance.m_parentName = target.name;
                m_genaSpawnerInstance.Spawn(spawnExtensionInfo.m_position, true);
            }

        }

        public void Delete()
        {

        }
    }
}