From 511515b9fa253781c12be0365761060e82d8426b Mon Sep 17 00:00:00 2001
From: Alessandro Proto <me@alexdevs.me>
Date: Fri, 27 Jan 2023 19:31:29 +0100
Subject: [PATCH] Added panic screen back

---
 Capy64/Runtime/InputEmitter.cs   |  1 +
 Capy64/Runtime/LuaState.cs       |  9 +++++
 Capy64/Runtime/PanicScreen.cs    | 57 ++++++++++++++++++++++++++++++++
 Capy64/Runtime/RuntimeManager.cs | 21 ++++++++++--
 4 files changed, 86 insertions(+), 2 deletions(-)
 create mode 100644 Capy64/Runtime/PanicScreen.cs

diff --git a/Capy64/Runtime/InputEmitter.cs b/Capy64/Runtime/InputEmitter.cs
index 21d9519..78baa9f 100644
--- a/Capy64/Runtime/InputEmitter.cs
+++ b/Capy64/Runtime/InputEmitter.cs
@@ -75,6 +75,7 @@ internal class InputEmitter
         if (heldReboot >= rebootDelay)
         {
             heldReboot = 0;
+            RuntimeManager.ResetPanic();
             RuntimeManager.Reboot();
         }
     }
diff --git a/Capy64/Runtime/LuaState.cs b/Capy64/Runtime/LuaState.cs
index 05870a8..3160430 100644
--- a/Capy64/Runtime/LuaState.cs
+++ b/Capy64/Runtime/LuaState.cs
@@ -135,9 +135,18 @@ public class LuaState : IDisposable
         string stacktrace = Thread.OptString(-1, null);
 
         var builder = new StringBuilder();
+        builder.AppendLine(status switch
+        {
+            LuaStatus.ErrSyntax => "Syntax error",
+            LuaStatus.ErrMem => "Out of memory",
+            LuaStatus.ErrErr => "Error",
+            LuaStatus.ErrRun => "Runtime error",
+            _ => status.ToString()
+        });
         builder.AppendLine(error);
         if (!string.IsNullOrWhiteSpace(stacktrace))
         {
+            builder.AppendLine();
             builder.Append(stacktrace);
         }
 
diff --git a/Capy64/Runtime/PanicScreen.cs b/Capy64/Runtime/PanicScreen.cs
new file mode 100644
index 0000000..aa3e880
--- /dev/null
+++ b/Capy64/Runtime/PanicScreen.cs
@@ -0,0 +1,57 @@
+using Capy64.Core;
+using Capy64.Runtime.Libraries;
+using Microsoft.Xna.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Capy64.Runtime;
+
+public class PanicScreen
+{
+    public static Color ForegroundColor = Color.White;
+    public static Color BackgroundColor = new Color(0, 51, 187);
+
+    public static void Render(string error, string details = null)
+    {
+        Term.ForegroundColor = ForegroundColor;
+        Term.BackgroundColor = BackgroundColor;
+        Term.SetCursorBlink(false);
+        Term.SetSize(51, 19);
+        Term.Clear();
+
+        var title = " Capy64 ";
+        var halfX = (Term.Width / 2) + 1;
+        Term.SetCursorPosition(halfX - (title.Length / 2), 2);
+        Term.ForegroundColor = BackgroundColor;
+        Term.BackgroundColor = ForegroundColor;
+        Term.Write(title);
+
+        Term.ForegroundColor = ForegroundColor;
+        Term.BackgroundColor = BackgroundColor;
+        Term.SetCursorPosition(1, 4);
+        Print(error + '\n');
+
+        if (details is not null)
+        {
+            Print(details);
+        }
+        Term.SetCursorPosition(1, 19);
+        Print("Hold CTRL + ALT + INSERT to reboot.");
+    }
+
+    private static void Print(string txt)
+    {
+        foreach (var ch in txt)
+        {
+            Term.Write(ch.ToString());
+            if (Term.CursorPosition.X >= Term.Width || ch == '\n')
+            {
+                Term.SetCursorPosition(1, (int)Term.CursorPosition.Y + 1);
+            }
+        }
+        Term.SetCursorPosition(1, (int)Term.CursorPosition.Y + 1);
+    }
+}
diff --git a/Capy64/Runtime/RuntimeManager.cs b/Capy64/Runtime/RuntimeManager.cs
index 67fbc1f..cc62bdf 100644
--- a/Capy64/Runtime/RuntimeManager.cs
+++ b/Capy64/Runtime/RuntimeManager.cs
@@ -20,6 +20,7 @@ internal class RuntimeManager : IPlugin
     private int step = 0;
 
     private static bool close = false;
+    private static bool inPanic = false;
 
     private static IGame _game;
     public RuntimeManager(IGame game)
@@ -59,10 +60,26 @@ internal class RuntimeManager : IPlugin
 
     private void Resume()
     {
-        if (close || !luaState.ProcessQueue())
+        if (inPanic) return;
+        try
         {
-            Start();
+            if (close || !luaState.ProcessQueue())
+            {
+                Start();
+            }
         }
+        catch (LuaException e)
+        {
+            Console.Error.WriteLine(e);
+            inPanic = true;
+            close = true;
+            PanicScreen.Render(e.Message);
+        }
+    }
+
+    public static void ResetPanic()
+    {
+        inPanic = false;
     }
 
     private void InitBIOS()