package surf

import "net/http"

// RouteInfo is a read-only snapshot of one registered route after Assemble
// or BuildRouter.
type RouteInfo struct {
	Method     string
	Pattern    string
	PluginID   string
	Middleware []string
	Raw        bool
}

// AdminPrefix reports the cabana admin mount path set by BuildRouter. False
// means no plugin registers an admin controller, so no admin routes exist.
func (r *Router) AdminPrefix() (string, bool) {
	if r == nil || !r.adminMounted {
		return "", false
	}
	return r.adminPrefix, true
}

// Routes returns a defensive copy of every registered route.
func (r *Router) Routes() []RouteInfo {
	if r == nil {
		return nil
	}
	out := make([]RouteInfo, len(r.routes))
	for i, rt := range r.routes {
		mw := append([]string{}, rt.middleware...)
		out[i] = RouteInfo{
			Method:     rt.method,
			Pattern:    rt.path,
			PluginID:   rt.pluginID,
			Middleware: mw,
			Raw:        rt.raw,
		}
	}
	return out
}

// Handler returns the compiled middleware chain of the route registered for
// method and pattern (as listed by Routes), for an in-process dispatch that
// must run the same constraints, guards, throttles, body limit, locale and
// recovery as an HTTP request. The caller sets the path values and Pattern
// on its request before serving, as the mux would. False when no such route
// exists or BuildRouter has not compiled the routes yet.
func (r *Router) Handler(method, pattern string) (http.Handler, bool) {
	if r == nil || r.handlers == nil {
		return nil, false
	}
	h, ok := r.handlers[method+" "+pattern]
	return h, ok && h != nil
}