package resolver

import (
	"github.com/safing/portbase/api"
)

func registerAPI() error {
	if err := api.RegisterEndpoint(api.Endpoint{
		Path:        "dns/clear",
		Read:        api.PermitUser,
		ActionFunc:  clearNameCache,
		Name:        "Clear cached DNS records",
		Description: "Deletes all saved DNS records from the database.",
	}); err != nil {
		return err
	}

	if err := api.RegisterEndpoint(api.Endpoint{
		Path:        "dns/resolvers",
		Read:        api.PermitAnyone,
		StructFunc:  exportDNSResolvers,
		Name:        "List DNS Resolvers",
		Description: "List currently configured DNS resolvers and their status.",
	}); err != nil {
		return err
	}

	return nil
}

type resolverExport struct {
	*Resolver
	Failing bool
}

func exportDNSResolvers(*api.Request) (interface{}, error) {
	resolversLock.RLock()
	defer resolversLock.RUnlock()

	export := make([]*resolverExport, 0, len(globalResolvers))
	for _, r := range globalResolvers {
		export = append(export, &resolverExport{
			Resolver: r,
			Failing:  r.Conn.IsFailing(),
		})
	}

	return export, nil
}