package repository

import (
	"authorization/internal"
	"database/sql"
	"fmt"
)

type UserPostgres struct {
	db *sql.DB
}

func NewUserPostgres(db *sql.DB) *UserPostgres {
	return &UserPostgres{db: db}
}

func (r *UserPostgres) CreateUser(user internal.User) (int, error) {
	var id int
	query := fmt.Sprintf("INSERT INTO %s(name,username,password_hash,role) values ($1,$2,$3,$4) RETURNING id", usersTable)
	row := r.db.QueryRow(query, user.Name, user.Username, user.Password, internal.Student)
	if err := row.Scan(&id); err != nil {
		return 0, err
	}

	return id, nil
}

func (r *UserPostgres) GetUser(username, password string) (internal.User, error) {
	var user internal.User
	query := fmt.Sprintf("SELECT * from %s where username = $1 AND password_hash=$2", usersTable)
	row := r.db.QueryRow(query, username, password)
	err := row.Scan(&user.Id, &user.Name, &user.Username, &user.Password, &user.UserRole)
	return user, err
}

func (r *UserPostgres) UpdateUserRole(username string, userrole internal.UserRole) (string, error) {
	query := fmt.Sprintf("UPDATE %s SET role = $1 WHERE username = $2 RETURNING role", usersTable)
	var newRole string
	err := r.db.QueryRow(query, userrole, username).Scan(&newRole)
	if err != nil {
		return "", fmt.Errorf("failed to update user role: %v", err)
	}
	return newRole, nil
}