package gateway

import (
	"context"

	"github.com/google/uuid"

	"nexavpn/backend/internal/wireguard"
)

type Service struct {
	repo Repository
}

func NewService(repo Repository) *Service {
	return &Service{repo: repo}
}

func (s *Service) List(ctx context.Context) ([]Gateway, error) {
	return s.repo.List(ctx)
}

func (s *Service) SelectActive(ctx context.Context) (Gateway, error) {
	return s.repo.FirstActive(ctx)
}

func (s *Service) BuildSyncBundle(ctx context.Context, gatewayID string) (wireguard.GatewayBundle, error) {
	id, err := uuid.Parse(gatewayID)
	if err != nil {
		return wireguard.GatewayBundle{}, err
	}
	return s.repo.BuildSyncBundle(ctx, id)
}

func (s *Service) Update(ctx context.Context, gatewayID string, input UpdateRequest) (Gateway, error) {
	id, err := uuid.Parse(gatewayID)
	if err != nil {
		return Gateway{}, err
	}
	return s.repo.Update(ctx, id, input)
}

func (s *Service) Bootstrap(ctx context.Context, input BootstrapRequest) (Gateway, error) {
	if input.Name == "" {
		input.Name = "primary-gateway"
	}
	if input.ListenPort == 0 {
		input.ListenPort = 51820
	}
	if input.VPNCIDR == "" {
		input.VPNCIDR = "100.96.0.0/24"
	}
	if len(input.DNSServers) == 0 {
		input.DNSServers = []string{"10.20.0.53"}
	}
	return s.repo.UpsertByName(ctx, input)
}