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

namespace ForgottenWawiTech.Content.Projectiles.TridentOfTheSunken
{
    public class TridentOfTheSunkenShot : ModProjectile
    {
        private const float ExplosionRadiusBlocks = 20f;
        private const int ExplosionDamage = 5000;
        private const int DrownDuration = 600; // 10 seconds

        private bool HasDetonated
        {
            get => Projectile.localAI[1] == 1f;
            set => Projectile.localAI[1] = value ? 1f : 0f;
        }

        public override void SetDefaults()
        {
            Projectile.width = 256;
            Projectile.height = 30;
            Projectile.friendly = true;
            Projectile.hostile = false;
            Projectile.DamageType = DamageClass.Magic;
            Projectile.penetrate = 1;
            Projectile.aiStyle = 0;
            Projectile.tileCollide = true;
            Projectile.ignoreWater = false;
            Projectile.extraUpdates = 1;
            Projectile.timeLeft = 180;
        }

        public override void AI()
        {
            if (Projectile.velocity.LengthSquared() > 0.0001f)
            {
                Projectile.direction = Projectile.spriteDirection = Projectile.velocity.X >= 0f ? 1 : -1;
                Projectile.rotation = Projectile.velocity.ToRotation();
                if (Projectile.spriteDirection == -1)
                {
                    Projectile.rotation += MathHelper.Pi;
                }
            }
            Lighting.AddLight(Projectile.Center, 0.1f, 0.2f, 0.6f);

            if (Main.rand.NextBool(3))
            {
                Dust dust = Dust.NewDustDirect(Projectile.position, Projectile.width, Projectile.height, DustID.WaterCandle, 0f, 0f, 150, default, 1.1f);
                dust.velocity *= 0.3f;
                dust.noGravity = true;
            }
        }

        public override bool OnTileCollide(Vector2 oldVelocity)
        {
            Detonate();
            return true;
        }

        public override void OnHitNPC(NPC target, NPC.HitInfo hit, int damageDone)
        {
            target.AddBuff(BuffID.Suffocation, DrownDuration);
            Detonate();
            Projectile.Kill();
        }

        public override void Kill(int timeLeft)
        {
            Detonate();
        }

        private void Detonate()
        {
            if (HasDetonated)
            {
                return;
            }

            HasDetonated = true;

            if (Projectile.owner == Main.myPlayer)
            {
                float radiusPixels = ExplosionRadiusBlocks * 16f;
                int explosion = Projectile.NewProjectile(Projectile.GetSource_Death(), Projectile.Center, Vector2.Zero, ModContent.ProjectileType<TridentOfTheSunkenBlast>(), ExplosionDamage, 8f, Projectile.owner, radiusPixels);
                if (Main.projectile.IndexInRange(explosion))
                {
                    Main.projectile[explosion].localAI[0] = radiusPixels;
                }
            }

            SoundEngine.PlaySound(SoundID.Item14 with { Volume = 1f, Pitch = -0.2f }, Projectile.Center);

            for (int i = 0; i < 20; i++)
            {
                Vector2 velocity = Main.rand.NextVector2Unit() * Main.rand.NextFloat(2f, 6f);
                Dust dust = Dust.NewDustDirect(Projectile.position, Projectile.width, Projectile.height, DustID.BlueCrystalShard, velocity.X, velocity.Y, 150, default, 1.2f);
                dust.noGravity = true;
            }
            Projectile.timeLeft = Math.Min(Projectile.timeLeft, 2);
        }
    }
}