package middleware

import (
	"log/slog"
)

// Option configures a middleware that logs, such as NewCSRF, Logger or
// Recoverer.
type Option func(*options)

// options holds the settings Options change.
type options struct {
	log *slog.Logger
}

// WithLogger makes a middleware log to logger instead of slog.Default().
func WithLogger(logger *slog.Logger) Option {
	return func(opts *options) {
		opts.log = logger
	}
}

// applyOptions returns the settings opts make.
func applyOptions(opts []Option) options {
	var settings options
	for _, opt := range opts {
		opt(&settings)
	}

	return settings
}

// logger returns the logger to use, tagged with component: the given one, or
// slog.Default(), looked up now.
func (opts options) logger(component string) *slog.Logger {
	log := opts.log
	if log == nil {
		log = slog.Default()
	}
	return log.With("component", component)
}