DeathMod

using SoulHarvest.Common;
using Microsoft.Xna.Framework;
using System;
using System.IO;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace SoulHarvest.Projectiles;

/// <summary>A continuous molten route left by Infernal movement and dash attacks.</summary>
public sealed class ReaperInfernalTrailProjectile : ModProjectile
{
    private SickleCombatSnapshot snapshot;
    private float routeLength;
    private float routeWidth;
    private int lifetime;
    private int age;
    private int seed;
    private bool configured;
    private bool serverAuthorized;

    public override string Texture => "Terraria/Images/Projectile_0";

    internal static int Spawn(Terraria.DataStructures.IEntitySource source, int owner,
        in SickleCombatSnapshot snapshot, Vector2 start, Vector2 end, float width,
        int phase, int actionId)
    {
        if (Main.netMode == NetmodeID.MultiplayerClient)
            return -1;
        Vector2 path = end - start;
        float length = path.Length();
        if (length < 8f)
            return -1;
        Vector2 axis = path / length;
        int damage = Math.Max(1, (int)Math.Round(snapshot.Damage * 0.25f));
        int index = Projectile.NewProjectile(source, (start + end) * 0.5f, axis,
            ModContent.ProjectileType<ReaperInfernalTrailProjectile>(), damage,
            snapshot.Knockback * 0.10f, owner);
        if (index < 0 || index >= Main.maxProjectiles)
            return -1;
        Projectile projectile = Main.projectile[index];
        projectile.originalDamage = snapshot.Damage;
        int skillLevel = Math.Clamp(Math.Max(1, (int)snapshot.Skill1), 1, 3);
        int activeLifetime = skillLevel switch { 1 => 90, 2 => 120, _ => 150 };
        int stableSeed = unchecked(actionId * 486187739 + phase * 16777619 + owner * 71);
        if (projectile.ModProjectile is ReaperInfernalTrailProjectile trail)
            trail.Configure(snapshot, length, width, activeLifetime, stableSeed);
        projectile.GetGlobalProjectile<MyGlobalProjectile>().ConfigureReaperProjectile(
            projectile, snapshot, ReaperHitKind.DamageOverTime, phase,
            axis.ToRotation(), actionId);
        projectile.localNPCHitCooldown = 30;
        ReaperProjectileHelper.SyncNewProjectile(projectile);
        return index;
    }

    public override void SetDefaults()
    {
        Projectile.width = 4;
        Projectile.height = 4;
        Projectile.friendly = true;
        Projectile.hostile = false;
        Projectile.tileCollide = false;
        Projectile.ignoreWater = true;
        Projectile.penetrate = -1;
        Projectile.timeLeft = 150;
        Projectile.netImportant = true;
        Projectile.DamageType = DamageClass.Melee;
        Projectile.usesLocalNPCImmunity = true;
        Projectile.localNPCHitCooldown = 30;
    }

    public override bool ShouldUpdatePosition() => false;
    public override bool? CanDamage()
        => configured && age >= 4 && Projectile.timeLeft > 15 ? null : false;

    public override void AI()
    {
        if (Main.netMode == NetmodeID.Server && !serverAuthorized)
        {
            Projectile.Kill();
            return;
        }
        if (!configured)
            return;
        age++;
        Projectile.rotation = Projectile.velocity.ToRotation();
    }

    public override bool? Colliding(Rectangle projHitbox, Rectangle targetHitbox)
    {
        Vector2 axis = Projectile.velocity.SafeNormalize(Vector2.UnitX);
        Vector2 start = Projectile.Center - axis * routeLength * 0.5f;
        Vector2 end = Projectile.Center + axis * routeLength * 0.5f;
        float collisionPoint = 0f;
        return Collision.CheckAABBvLineCollision(targetHitbox.TopLeft(), targetHitbox.Size(),
            start, end, routeWidth * 0.62f, ref collisionPoint);
    }

    public override bool PreDraw(ref Color lightColor)
    {
        if (!configured || Main.dedServ)
            return false;
        float reveal = Smooth01(age / 9f);
        float fade = Smooth01(Projectile.timeLeft / 30f);
        float pulse = 0.94f + (float)Math.Sin(age * 0.11f + seed * 0.001f) * 0.06f;
        Vector2 center = Projectile.Center - Main.screenPosition;
        DeathDomainPrimitiveTextureSystem.DrawBladeCentered(center, Projectile.rotation,
            routeLength, routeWidth * 1.55f, new Color(8, 2, 0, 225) * fade, reveal);
        DeathDomainPrimitiveTextureSystem.DrawBladeCentered(center, Projectile.rotation,
            routeLength, routeWidth * pulse, new Color(245, 48, 3, 0) * (fade * 0.86f), reveal);
        DeathDomainPrimitiveTextureSystem.DrawBladeCentered(center, Projectile.rotation,
            routeLength, Math.Max(1.5f, routeWidth * 0.24f),
            new Color(255, 225, 94, 0) * fade, reveal);

        Vector2 axis = Projectile.velocity.SafeNormalize(Vector2.UnitX);
        Vector2 start = Projectile.Center - axis * routeLength * 0.5f;
        for (int mote = 0; mote < 5; mote++)
        {
            float amount = (age * 0.019f + mote / 5f + seed * 0.00013f) % 1f;
            Vector2 point = start + axis * routeLength * amount;
            float radius = 1.8f + mote % 2 * 0.7f;
            DeathDomainPrimitiveTextureSystem.DrawSmoothDisc(Main.spriteBatch,
                point - Main.screenPosition, radius + 2f,
                new Color(255, 52, 5, 0) * (fade * 0.42f));
            DeathDomainPrimitiveTextureSystem.DrawSmoothDisc(Main.spriteBatch,
                point - Main.screenPosition, radius,
                new Color(255, 231, 120, 0) * (fade * 0.92f));
        }
        return false;
    }

    public override void SendExtraAI(BinaryWriter writer)
    {
        writer.Write(configured);
        if (!configured)
            return;
        snapshot.Write(writer);
        writer.Write(routeLength);
        writer.Write(routeWidth);
        writer.Write((short)lifetime);
        writer.Write(seed);
        writer.Write((short)Math.Clamp(age, 0, short.MaxValue));
    }

    public override void ReceiveExtraAI(BinaryReader reader)
    {
        bool incoming = reader.ReadBoolean();
        if (!incoming)
        {
            if (Main.netMode != NetmodeID.Server)
                configured = false;
            return;
        }
        SickleCombatSnapshot incomingSnapshot = SickleCombatSnapshot.Read(reader);
        float incomingLength = reader.ReadSingle();
        float incomingWidth = reader.ReadSingle();
        int incomingLifetime = reader.ReadInt16();
        int incomingSeed = reader.ReadInt32();
        int incomingAge = reader.ReadInt16();
        if (Main.netMode == NetmodeID.Server)
            return;
        snapshot = incomingSnapshot;
        routeLength = incomingLength;
        routeWidth = incomingWidth;
        lifetime = incomingLifetime;
        seed = incomingSeed;
        age = incomingAge;
        configured = true;
    }

    private void Configure(in SickleCombatSnapshot value, float length, float width,
        int activeLifetime, int shapeSeed)
    {
        snapshot = value;
        routeLength = MathHelper.Clamp(length, 8f, 1600f);
        routeWidth = MathHelper.Clamp(width, 6f, 80f);
        lifetime = Math.Clamp(activeLifetime, 45, 240);
        seed = shapeSeed;
        age = 0;
        configured = true;
        serverAuthorized = Main.netMode != NetmodeID.MultiplayerClient;
        Projectile.timeLeft = lifetime;
    }

    private static float Smooth01(float value)
    {
        value = MathHelper.Clamp(value, 0f, 1f);
        return value * value * (3f - 2f * value);
    }
}