package hws

import (
	"errors"
	"fmt"
	"net/url"

	"github.com/rs/zerolog"
)

type logger struct {
	logger       *zerolog.Logger
	ignoredPaths []string
}

// Server.AddLogger adds a logger to the server to use for request logging.
func (server *Server) AddLogger(zlogger *zerolog.Logger) error {
	if zlogger == nil {
		return errors.New("Unable to add logger, no logger provided")
	}
	server.logger = &logger{
		logger: zlogger,
	}
	return nil
}

// Server.LoggerIgnorePaths sets a list of URL paths to ignore logging for.
// Path should match the url.URL.Path field, see https://pkg.go.dev/net/url#URL
// Useful for ignoring requests to CSS files or favicons
func (server *Server) LoggerIgnorePaths(paths ...string) error {
	for _, path := range paths {
		u, err := url.Parse(path)
		valid := err == nil &&
			u.Scheme == "" &&
			u.Host == "" &&
			u.RawQuery == "" &&
			u.Fragment == ""
		if !valid {
			return fmt.Errorf("Invalid path: '%s'", path)
		}
	}
	server.logger.ignoredPaths = paths
	return nil
}