// SPDX-License-Identifier: AGPL-3.0-or-later

package store

import (
	"database/sql"
	"errors"
	"fmt"
	"strings"
)

var ErrSignupRequestExists = errors.New("signup request already exists")

type SignupRequestStore struct {
	db *sql.DB
}

func NewSignupRequestStore(db *sql.DB) *SignupRequestStore {
	return &SignupRequestStore{db: db}
}

// Create stores a pending signup request with a hashed password.
func (s *SignupRequestStore) Create(username, password string) error {
	hash, err := hashPassword(password)
	if err != nil {
		return fmt.Errorf("hash password: %w", err)
	}

	_, err = s.db.Exec(
		`INSERT INTO signup_requests (username, password_hash) VALUES (?, ?)`,
		username, hash,
	)
	if err != nil {
		if strings.Contains(err.Error(), "UNIQUE constraint failed") {
			return ErrSignupRequestExists
		}
		return fmt.Errorf("insert signup request: %w", err)
	}
	return nil
}

// PendingCount returns the number of pending signup requests.
func (s *SignupRequestStore) PendingCount() (int, error) {
	var n int
	err := s.db.QueryRow("SELECT COUNT(*) FROM signup_requests WHERE status = 'pending'").Scan(&n)
	return n, err
}