DeathMod

using SoulHarvest.Common;
using SoulHarvest.Items;
using SoulHarvest.Tiles;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System;
using System.Collections.Generic;
using Terraria;
using Terraria.Audio;
using Terraria.GameContent;
using Terraria.GameContent.UI.Elements;
using Terraria.ID;
using Terraria.Localization;
using Terraria.ModLoader;
using Terraria.UI;

namespace SoulHarvest.UI;


[Autoload(Side = ModSide.Client)]
public class DeathAltarUISystem : ModSystem
{
    private UserInterface? altarInterface;
    private DeathAltarUIState? altarState;
    private bool escapeWasDown;
    public bool IsVisible => altarInterface?.CurrentState is not null;

    public override void Load()
    {
        altarState = new DeathAltarUIState();
        altarState.Activate();
        altarInterface = new UserInterface();
    }

    public void Show(int tileX, int tileY)
    {
        altarState?.SetAltarPosition(tileX, tileY);
        altarInterface?.SetState(altarState);
    }

    public void Hide()
    {
        altarState?.CancelTransientInteraction();
        altarInterface?.SetState(null);
    }

    public override void UpdateUI(GameTime gameTime)
    {
        if (!IsVisible || altarState is null)
            return;
        bool escapeIsDown = Main.keyState.IsKeyDown(Keys.Escape);
        if (escapeIsDown && !escapeWasDown)
        {
            SoundEngine.PlaySound(SoundID.MenuClose);
            Hide();
        }
        escapeWasDown = escapeIsDown;
        if (!altarState.IsPlayerNearAltar())
        {
            Hide();
            return;
        }
        altarInterface?.Update(gameTime);
    }

    public override void ModifyInterfaceLayers(List<GameInterfaceLayer> layers)
    {
        int index = layers.FindIndex(layer => layer.Name == "Vanilla: Mouse Text");
        if (index < 0)
            return;
        layers.Insert(index, new LegacyGameInterfaceLayer("SoulHarvest: Death Altar Skill Tree", () =>
        {
            if (IsVisible)
                altarInterface?.Draw(Main.spriteBatch, new GameTime());
            return true;
        }, InterfaceScaleType.UI));
    }

    internal void RequestUpgrade(DeathAltarUpgradeType type, DeathAltarItemReference itemReference, int tileX, int tileY)
    {
        if (Main.netMode == NetmodeID.SinglePlayer)
        {
            DeathAltarUpgradeService.TryUpgrade(Main.LocalPlayer, type, itemReference, tileX, tileY);
            return;
        }
        ModPacket packet = ModContent.GetInstance<SoulHarvest>().GetPacket();
        packet.Write((byte)SoulHarvest.MessageType.RequestAltarUpgrade);
        packet.Write((byte)type);
        packet.Write((byte)itemReference.Storage);
        packet.Write(itemReference.Slot);
        packet.Write(itemReference.ExpectedItemType);
        packet.Write((short)tileX);
        packet.Write((short)tileY);
        packet.Send();
    }
}