// Package resolver provides iterative DNS resolution from root nameservers.
package resolver

import (
	"context"
	"errors"
	"log/slog"

	"go.uber.org/fx"

	"sneak.berlin/go/dnswatcher/internal/logger"
)

// ErrNotImplemented indicates the resolver is not yet implemented.
var ErrNotImplemented = errors.New("resolver not yet implemented")

// Params contains dependencies for Resolver.
type Params struct {
	fx.In

	Logger *logger.Logger
}

// Resolver performs iterative DNS resolution from root servers.
type Resolver struct {
	log *slog.Logger
}

// New creates a new Resolver instance.
func New(
	_ fx.Lifecycle,
	params Params,
) (*Resolver, error) {
	return &Resolver{
		log: params.Logger.Get(),
	}, nil
}

// LookupNS performs iterative resolution to find authoritative
// nameservers for the given domain.
func (r *Resolver) LookupNS(
	_ context.Context,
	_ string,
) ([]string, error) {
	return nil, ErrNotImplemented
}

// LookupAllRecords performs iterative resolution to find all DNS
// records for the given hostname.
func (r *Resolver) LookupAllRecords(
	_ context.Context,
	_ string,
) (map[string][]string, error) {
	return nil, ErrNotImplemented
}

// ResolveIPAddresses resolves a hostname to all IPv4 and IPv6
// addresses, following CNAME chains.
func (r *Resolver) ResolveIPAddresses(
	_ context.Context,
	_ string,
) ([]string, error) {
	return nil, ErrNotImplemented
}