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

namespace ForgottenWawiTech.Content.NPCs.Enemies.AvalianInvasion
{
    public class AvalianTechnician : ModNPC
    {
        private int laserTimer = 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 = 36;
            NPC.height = 44;
            NPC.damage = 40;
            NPC.defense = 12;
            NPC.lifeMax = 300;
            NPC.HitSound = SoundID.NPCHit1;
            NPC.DeathSound = SoundID.NPCDeath6;
            NPC.value = Item.buyPrice(0, 0, 15, 0);
            NPC.knockBackResist = 0.4f;
            NPC.aiStyle = NPCAIStyleID.Bat;
        }

        public override void AI()
        {
            Player target = Main.player[NPC.target];
            if (target.active && !target.dead)
            {
                laserTimer++;
                
                // Circle around player
                float distanceToPlayer = Vector2.Distance(NPC.Center, target.Center);
                if (distanceToPlayer > 400f)
                {
                    // Move closer
                    Vector2 toPlayer = Vector2.Normalize(target.Center - NPC.Center);
                    NPC.velocity = toPlayer * 4f;
                }
                else if (distanceToPlayer < 350f)
                {
                    // Orbit
                    Vector2 toPlayer = target.Center - NPC.Center;
                    Vector2 perpendicular = new Vector2(-toPlayer.Y, toPlayer.X);
                    perpendicular.Normalize();
                    NPC.velocity = perpendicular * 3f;
                }

                // Fire laser every 60 frames (1 second)
                if (laserTimer >= 60)
                {
                    laserTimer = 0;
                    
                    if (Main.netMode != NetmodeID.MultiplayerClient)
                    {
                        Vector2 shootDirection = Vector2.Normalize(target.Center - NPC.Center);
                        Projectile.NewProjectile(NPC.GetSource_FromAI(), NPC.Center, 
                            shootDirection * 12f, ProjectileID.DeathLaser, 
                            NPC.damage / 2, 1f);
                    }
                }
            }
        }

        public override void HitEffect(NPC.HitInfo hit)
        {
            if (NPC.life <= 0)
            {
                // Tech parts and feathers
                for (int i = 0; i < 8; i++)
                {
                    Dust.NewDust(NPC.position, NPC.width, NPC.height, DustID.Feather);
                }
                for (int i = 0; i < 5; i++)
                {
                    Dust.NewDust(NPC.position, NPC.width, NPC.height, DustID.Electric);
                }
            }
        }

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