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

public class RocketShell : ProjectileBase
{
    [SerializeField] private float visualDamageAmount = 1000.0f;
    [SerializeField] private float visualDamageRadius = 10.0f;
    [SerializeField] private LayerMask whatCanBeHitByRocket;
    private float splitAmount = 5f;
    private HashSet<NPC> hitNPCs = new HashSet<NPC>();
    private bool hasHit = false;


    protected override void OnHitEntity(Collision col)
    {
        SpawnDamageVisuals(col);
        TimedPooledDestroy();
    }

    private void SpawnDamageVisuals(Collision col)
    {
        if (!hasHit)
        {
            Collider[] hitEnemies = Physics.OverlapSphere(col.contacts[0].point, visualDamageRadius, whatCanBeHitByRocket);
            foreach (Collider collider in hitEnemies)
            {
                if (collider.transform.root.TryGetComponent(out NPC npc) && !hitNPCs.Contains(npc))
                {
                    hitNPCs.Add(npc);
                    SplitDamage(npc.getNA().GetHeadPosition());
                }
            }
        }
        hasHit = true;

    }

    private void SplitDamage(Vector3 spawnPos)
    {
        float damage = visualDamageAmount / splitAmount;
        for (int i = 0; i < splitAmount; i++)
        {
            GameObject damageTextClone = NetworkPooler.Instance.PooledInstantiate("FloatingDamageText", spawnPos, Quaternion.identity);
            FloatingDamageText text = damageTextClone.GetComponent<FloatingDamageText>();
            text.MaxWaitTime = 3.0f;
            text.GetText().color = Color.red;

            float visualDamageVariance = Random.Range(damage - 30.0f, damage + 30.0f);
            text.GetText().SetText(Mathf.RoundToInt(visualDamageVariance).ToString());
        }
    }

    private void TimedPooledDestroy()
    {
        //we want it to put back into the pool after time, so the particle effect doesnt disapear abruptly. so stop its movement until returned to pool.
        rb.velocity = Vector3.zero;
        rb.angularVelocity = Vector3.zero;

        string baseName = NetworkPooler.GetBaseName(transform.name);
        if (NetworkPooler.Instance.poolDictionary.ContainsKey(baseName))
            NetworkPooler.Instance.PooledDestroy(baseName, gameObject, 5.0f);
    }
}