From c395c22bc21d2e3e7874d7a336def63abdad5292 Mon Sep 17 00:00:00 2001
From: Nick Dumas <drakonik@gmail.com>
Date: Wed, 21 Jan 2026 10:02:52 -0500
Subject: [PATCH] add more logging

---
 cmd/cli/guest/main.go | 15 ++++++++++++---
 core/core.go          |  5 +++--
 systems/exit.go       | 27 +++++++++++++++++++++++++++
 systems/room.go       | 11 +++--------
 4 files changed, 45 insertions(+), 13 deletions(-)
 create mode 100644 systems/exit.go

diff --git a/cmd/cli/guest/main.go b/cmd/cli/guest/main.go
index c489c92..c6c143c 100644
--- a/cmd/cli/guest/main.go
+++ b/cmd/cli/guest/main.go
@@ -14,14 +14,23 @@ import (
 
 func main() {
 	var (
-		level string
+		level   string
+		logFile string
 	)
 
-	flag.StringVar(&level, "level", "INFO", "Log level: INFO/info, DEBUG/debug, or ERROR/error")
+	flag.StringVar(&level, "level", "INFO", "Log level: INFO/info, DEBUG/debug, or ERROR/error.")
+	flag.StringVar(&logFile, "log", "out.log", "Path to log file.")
 
 	flag.Parse()
 
-	app := core.New(level)
+	f, err := os.Create(logFile)
+	if err != nil {
+		slog.With(
+			slog.Any("error", err),
+		).Error("could not open log file")
+		os.Exit(1)
+	}
+	app := core.New(level, f)
 
 	rs := &systems.RoomSystem{
 		Rooms: make(map[uint64]*systems.Room, 0),
diff --git a/core/core.go b/core/core.go
index f27528b..b7edec6 100644
--- a/core/core.go
+++ b/core/core.go
@@ -3,6 +3,7 @@ package core
 import (
 	"bufio"
 	"context"
+	"io"
 	"log/slog"
 	"os"
 	"time"
@@ -15,7 +16,7 @@ type App struct {
 	L *slog.Logger
 }
 
-func New(level string) *App {
+func New(level string, logFile io.Writer) *App {
 	var logLevel slog.Level
 	switch level {
 	case "INFO", "info":
@@ -27,7 +28,7 @@ func New(level string) *App {
 	}
 
 	l := slog.New(slog.NewTextHandler(
-		os.Stderr, &slog.HandlerOptions{
+		logFile, &slog.HandlerOptions{
 			Level: logLevel,
 		},
 	),
diff --git a/systems/exit.go b/systems/exit.go
new file mode 100644
index 0000000..16f99a4
--- /dev/null
+++ b/systems/exit.go
@@ -0,0 +1,27 @@
+package systems
+
+import (
+	"log/slog"
+
+	"github.com/EngoEngine/ecs"
+
+	"code.ndumas.com/ndumas/muddy/components"
+)
+
+type Exit struct {
+	*components.ID
+	*components.Observable
+	To, From uint64
+}
+
+type ExitSystem struct {
+	L     *slog.Logger
+	exits map[uint64]*Exit
+}
+
+func (es *ExitSystem) New(w *ecs.World) {}
+
+func (es *ExitSystem) Update(dt float32) {
+}
+
+func (es *ExitSystem) Remove(e ecs.BasicEntity) {}
diff --git a/systems/room.go b/systems/room.go
index dc135dc..68777b2 100644
--- a/systems/room.go
+++ b/systems/room.go
@@ -10,12 +10,6 @@ import (
 	"code.ndumas.com/ndumas/muddy/components"
 )
 
-type Exit struct {
-	*components.ID
-	*components.Observable
-	To, From uint64
-}
-
 type Room struct {
 	*components.ID
 	*components.Location
@@ -61,7 +55,6 @@ func (rs *RoomSystem) New(w *ecs.World) {
 }
 
 func (rs *RoomSystem) Update(dt float32) {
-	rs.L.Debug("tick")
 	weather := []string{
 		"The sky is clear and birds sing.",
 		"It's dark and rainy.",
@@ -69,7 +62,9 @@ func (rs *RoomSystem) Update(dt float32) {
 	}
 
 	if rand.Intn(2000) > 1990 {
-		fmt.Println(weather[rand.Intn(len(weather))])
+		idx := rand.Intn(len(weather))
+		rs.L.With(slog.Int("idx", idx)).Debug("sending weather message")
+		fmt.Println(weather[idx])
 	}
 
 	// flush changes to persistent storage