package api

import (
	"context"

	codequestpb "github.com/hhhapz/codequest/api/v1"
	"github.com/hhhapz/codequest/models"
	"golang.org/x/oauth2"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/reflection"
)

// inProd tells the server whether it is in prod.
// It should be set using ldflags on build time.
var inProd bool

type OAuthStore interface {
	Create(callback string) (code string)
	Validate(code string) (string, bool)
	Exchange(ctx context.Context, code string) (*oauth2.Token, error)
}

type UserStore interface {
	ConsumeToken(ctx context.Context, token *oauth2.Token) (*models.Token, bool, error)

	CreateToken(ctx context.Context, user *models.User) (*models.Token, error)
	RevokeToken(ctx context.Context, token string) error
	RevokeUserTokens(ctx context.Context, user *models.User) (int64, error)

	User(ctx context.Context, email string) (*models.User, error)
	Users(ctx context.Context) ([]*models.User, error)

	UserByToken(ctx context.Context, token string) (*models.User, error)

	UpdateUser(ctx context.Context, user *models.User) error
	DeleteUser(ctx context.Context, user *models.User) error
}

type Server struct {
	*AuthService
	*UserService
}

func NewServer(os OAuthStore, us UserStore) (*grpc.Server, error) {
	s := &Server{
		AuthService: &AuthService{
			oauthStore: os,
			userStore:  us,
		},
		UserService: &UserService{
			userStore: us,
		},
	}
	srv := grpc.NewServer(
		grpc.UnaryInterceptor(AuthInterceptor(s.AuthService.defaultAuthFunc)),
	)
	reflection.Register(srv)
	codequestpb.RegisterAuthServiceServer(srv, s.AuthService)
	codequestpb.RegisterUserServiceServer(srv, s.UserService)
	return srv, nil
}

// List of commonly used error values
var (
	ErrInvalidArgument = grpc.Errorf(
		codes.InvalidArgument,
		"Invalid argument",
	)
)

func err() {
}