package debug

import (
	"context"
	"fmt"
	"net"
	"net/http"

	"github.com/owncloud/ocis/v2/ocis-pkg/handlers"
	"github.com/owncloud/ocis/v2/ocis-pkg/service/debug"
	"github.com/owncloud/ocis/v2/ocis-pkg/version"
)

// Server initializes the debug service and server.
func Server(opts ...Option) (*http.Server, error) {
	options := newOptions(opts...)

	checkHandler := handlers.NewCheckHandler(
		handlers.NewCheckHandlerConfiguration().
			WithLogger(options.Logger).WithCheck("web reachability", func(ctx context.Context) error {
			conn, err := net.Dial("tcp", options.Config.HTTP.Addr)
			defer func(conn net.Conn) {
				err := conn.Close()
				if err != nil {
					return
				}
			}(conn)
			if err != nil {
				return fmt.Errorf("could not connect to web server: %v", err)
			}

			return nil
		}),
	)

	return debug.NewService(
		debug.Logger(options.Logger),
		debug.Name(options.Config.Service.Name),
		debug.Version(version.GetString()),
		debug.Address(options.Config.Debug.Addr),
		debug.Token(options.Config.Debug.Token),
		debug.Pprof(options.Config.Debug.Pprof),
		debug.Zpages(options.Config.Debug.Zpages),
		debug.Health(checkHandler),
		debug.Ready(checkHandler),
	), nil
}