ForgottenWawiTech/Content/NPCs/Enemies/AvalianInvasion/AvalianRifleman.cs

using Terraria;
using Terraria.ID;
using Terraria.ModLoader;
using Microsoft.Xna.Framework;

namespace ForgottenWawiTech.Content.NPCs.Enemies.AvalianInvasion
{
    public class AvalianRifleman : ModNPC
    {
        private int shootTimer = 0;

        public override void SetStaticDefaults()
        {
            Main.npcFrameCount[Type] = 6;
            NPCID.Sets.NPCBestiaryDrawModifiers value = new NPCID.Sets.NPCBestiaryDrawModifiers(0)
            {
                Velocity = 1f
            };
            NPCID.Sets.NPCBestiaryDrawOffset.Add(Type, value);
        }

        public override void SetDefaults()
        {
            NPC.width = 34;
            NPC.height = 42;
            NPC.damage = 55;
            NPC.defense = 20;
            NPC.lifeMax = 400;
            NPC.HitSound = SoundID.NPCHit1;
            NPC.DeathSound = SoundID.NPCDeath6;
            NPC.value = Item.buyPrice(0, 0, 10, 0);
            NPC.knockBackResist = 0.3f;
            NPC.aiStyle = NPCAIStyleID.Bat; // Flying ranged enemy
        }

        public override void AI()
        {
            // Ranged attack behavior
            Player target = Main.player[NPC.target];
            if (target.active && !target.dead)
            {
                shootTimer++;
                
                // Keep distance from player
                float distanceToPlayer = Vector2.Distance(NPC.Center, target.Center);
                if (distanceToPlayer < 300f)
                {
                    // Move away
                    Vector2 awayDirection = Vector2.Normalize(NPC.Center - target.Center);
                    NPC.velocity = awayDirection * 3f;
                }

                // Shoot every 90 frames (1.5 seconds)
                if (shootTimer >= 90)
                {
                    shootTimer = 0;
                    
                    if (Main.netMode != NetmodeID.MultiplayerClient)
                    {
                        Vector2 shootDirection = Vector2.Normalize(target.Center - NPC.Center);
                        Projectile.NewProjectile(NPC.GetSource_FromAI(), NPC.Center, 
                            shootDirection * 10f, ProjectileID.BulletHighVelocity, 
                            NPC.damage / 2, 1f);
                    }
                }
            }
        }

        public override void HitEffect(NPC.HitInfo hit)
        {
            if (NPC.life <= 0)
            {
                for (int i = 0; i < 12; i++)
                {
                    Dust.NewDust(NPC.position, NPC.width, NPC.height, DustID.Feather);
                }
            }
        }

        public override float SpawnChance(NPCSpawnInfo spawnInfo)
        {
            return 0f; // Controlled by invasion system
        }
    }
}