From a8f8f63e88471a400f112b2cf6731a8d9a55f9fc Mon Sep 17 00:00:00 2001
From: Robin Olsen <robinolsen98@outlook.com>
Date: Mon, 2 Mar 2026 23:04:57 +0100
Subject: [PATCH] configure json logger

---
 internal/app/options.go | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/internal/app/options.go b/internal/app/options.go
index 840c865..d288c28 100644
--- a/internal/app/options.go
+++ b/internal/app/options.go
@@ -2,8 +2,10 @@ package app
 
 import (
 	"context"
+	"io"
 	"log/slog"
 	"os"
+	"path/filepath"
 
 	"github.com/LazyBachelor/LazyPM/internal/models"
 )
@@ -23,15 +25,43 @@ type AppBuilder struct {
 }
 
 func defaultBuilder(ctx context.Context, config Config) *AppBuilder {
+	lifecycle := NewLifecycle()
+	logger := newDefaultLogger(config, lifecycle)
+
 	return &AppBuilder{
 		ctx:         ctx,
 		config:      config,
-		lifecycle:   NewLifecycle(),
+		lifecycle:   lifecycle,
 		initializer: &InteractiveInitializer{},
-		logger:      slog.New(slog.NewJSONHandler(os.Stdout, nil)),
+		logger:      logger,
 	}
 }
 
+func newDefaultLogger(config Config, lifecycle *Lifecycle) *slog.Logger {
+	statsDir := filepath.Dir(config.StatisticsStoragePath)
+	if statsDir == "" {
+		statsDir = "."
+	}
+
+	if err := os.MkdirAll(statsDir, 0o755); err != nil {
+		return slog.New(slog.NewJSONHandler(io.Discard, nil))
+	}
+
+	logPath := filepath.Join(statsDir, "app-logs.jsonl")
+	logFile, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
+	if err != nil {
+		return slog.New(slog.NewJSONHandler(io.Discard, nil))
+	}
+
+	if lifecycle != nil {
+		lifecycle.Add(func() {
+			_ = logFile.Close()
+		})
+	}
+
+	return slog.New(slog.NewJSONHandler(logFile, &slog.HandlerOptions{}))
+}
+
 func WithLogger(logger *slog.Logger) Option {
 	return func(b *AppBuilder) error {
 		b.logger = logger