/*
Copyright © 2026 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package middleware

import (
	"context"
	"log/slog"
)

// loggerKey is the unexported context key used to store the request-scoped logger.
type loggerKey struct{}

// LoggerFromContext retrieves the request-scoped logger stored in ctx.
// When no logger is present (e.g. in unit tests) it returns slog.Default()
// as a safe fallback so callers never need to guard against a nil logger.
func LoggerFromContext(ctx context.Context) *slog.Logger {
	if logger, ok := ctx.Value(loggerKey{}).(*slog.Logger); ok && logger != nil {
		return logger
	}
	return slog.Default()
}