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package auth
import (
"context"
"errors"
"log"
"time"
"github.com/jackc/pgx/v5"
"golang.org/x/crypto/bcrypt"
"github.com/nsfisis/phperkaigi-2025-albatross/backend/account"
"github.com/nsfisis/phperkaigi-2025-albatross/backend/db"
"github.com/nsfisis/phperkaigi-2025-albatross/backend/fortee"
)
var (
ErrForteeLoginTimeout = errors.New("fortee login timeout")
)
const (
forteeAPITimeout = 3 * time.Second
)
func Login(
ctx context.Context,
queries *db.Queries,
username string,
password string,
) (int, error) {
userAuth, err := queries.GetUserAuthByUsername(ctx, username)
if err != nil && !errors.Is(err, pgx.ErrNoRows) {
return 0, err
}
if userAuth.AuthType == "password" {
// Authenticate with password.
passwordHash := userAuth.PasswordHash
if passwordHash == nil {
panic("inconsistant data")
}
err := bcrypt.CompareHashAndPassword([]byte(*passwordHash), []byte(password))
if err != nil {
return 0, err
}
return int(userAuth.UserID), nil
}
// Authenticate with fortee.
return verifyForteeAccountOrSignup(ctx, queries, username, password)
}
func verifyForteeAccountOrSignup(
ctx context.Context,
queries *db.Queries,
username string,
password string,
) (int, error) {
canonicalizedUsername, err := verifyForteeAccount(ctx, username, password)
if err != nil {
return 0, err
}
userID, err := queries.GetUserIDByUsername(ctx, canonicalizedUsername)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
return signup(
ctx,
queries,
canonicalizedUsername,
)
}
return 0, err
}
return int(userID), nil
}
func signup(
ctx context.Context,
queries *db.Queries,
username string,
) (int, error) {
// TODO: transaction
userID, err := queries.CreateUser(ctx, username)
if err != nil {
return 0, err
}
if err := queries.CreateUserAuth(ctx, db.CreateUserAuthParams{
UserID: userID,
AuthType: "fortee",
}); err != nil {
return 0, err
}
go func() {
err := account.FetchIcon(context.Background(), queries, int(userID))
if err != nil {
log.Printf("%v", err)
// The failure is intentionally ignored. Retry manually if needed.
}
}()
return int(userID), nil
}
func verifyForteeAccount(ctx context.Context, username string, password string) (string, error) {
ctx, cancel := context.WithTimeout(ctx, forteeAPITimeout)
defer cancel()
canonicalizedUsername, err := fortee.Login(ctx, username, password)
if errors.Is(err, context.DeadlineExceeded) {
return "", ErrForteeLoginTimeout
}
return canonicalizedUsername, err
}
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