ForgottenWawiTech/Content/Players/ProtogenSentinelPlayer.cs

using System;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ModLoader;
using ForgottenWawiTech.Content.Projectiles.Protogen;
using ForgottenWawiTech.Content.GlobalProjectiles;

namespace ForgottenWawiTech.Content.Players
{
    public class ProtogenSentinelPlayer : ModPlayer
    {
        private const int CoreProjectileCount = 1;
        private const int CoreBaseDamage = 320;
        private const float CoreSpawnOffset = -68f;
        private const float FragmentSplitChance = 0.20f;

        public bool SentinelCoreActive { get; private set; }
        public bool SentinelProjectileSplitActive { get; private set; }

        public override void ResetEffects()
        {
            SentinelCoreActive = false;
            SentinelProjectileSplitActive = false;
        }

        public void EnableSentinelCore()
        {
            SentinelCoreActive = true;
            SentinelProjectileSplitActive = true;
        }

        public override void PostUpdate()
        {
            if (!SentinelCoreActive)
            {
                return;
            }

            if (Player.whoAmI != Main.myPlayer)
            {
                return;
            }

            int coreType = ModContent.ProjectileType<ProtogenSentinelCore>();
            if (Player.ownedProjectileCounts[coreType] >= CoreProjectileCount)
            {
                return;
            }

            var source = Player.GetSource_Misc("ProtogenSentinelSet");
            Vector2 spawnPos = Player.Center + new Vector2(0f, CoreSpawnOffset);
            Projectile.NewProjectile(
                source,
                spawnPos,
                Vector2.Zero,
                coreType,
                0,
                0f,
                Player.whoAmI);
        }

        public static int GetCoreDamage(Player player)
        {
            return (int)player.GetTotalDamage(DamageClass.Summon).ApplyTo(CoreBaseDamage);
        }

        public override void OnHitNPCWithProj(Projectile proj, NPC target, NPC.HitInfo hit, int damageDone)
        {
            if (!SentinelProjectileSplitActive || Player.whoAmI != Main.myPlayer)
            {
                return;
            }

            if (!proj.friendly || proj.owner != Player.whoAmI)
            {
                return;
            }

            if (proj.GetGlobalProjectile<ProtogenSentinelGlobalProjectile>().DisableSentinelSplit)
            {
                return;
            }

            if (proj.type == ModContent.ProjectileType<ProtogenSentinelCoreBeam>() || proj.type == ModContent.ProjectileType<ProtogenSentinelFragment>())
            {
                return;
            }

            if (damageDone <= 0)
            {
                return;
            }

            if (Main.rand.NextFloat() > FragmentSplitChance)
            {
                return;
            }

            SpawnFragments(proj, damageDone);
        }

        private void SpawnFragments(Projectile sourceProj, int damageDone)
        {
            int fragmentType = ModContent.ProjectileType<ProtogenSentinelFragment>();
            int fragmentCount = 2;
            int fragmentDamage = Math.Max(1, damageDone / 2);
            var source = Player.GetSource_Misc("ProtogenSentinelSplit");

            for (int i = 0; i < fragmentCount; i++)
            {
                float rotation = MathHelper.ToRadians(Main.rand.NextFloat(-18f, 18f));
                Vector2 launch = sourceProj.velocity.SafeNormalize(Vector2.UnitY).RotatedBy(rotation) * 14f;
                Projectile fragment = Projectile.NewProjectileDirect(
                    source,
                    sourceProj.Center,
                    launch,
                    fragmentType,
                    fragmentDamage,
                    2f,
                    Player.whoAmI);
                fragment.GetGlobalProjectile<ProtogenSentinelGlobalProjectile>().DisableSentinelSplit = true;
            }
        }
    }
}