CREATE EXTENSION IF NOT EXISTS pgcrypto;

CREATE TABLE IF NOT EXISTS users (
    id BIGSERIAL PRIMARY KEY,
    username VARCHAR(50) UNIQUE NOT NULL,
    password VARCHAR(255) NOT NULL,
    role VARCHAR(20) NOT NULL DEFAULT 'STUDENT'
);

-- Админ по умолчанию: admin / admin (bcrypt через pgcrypto)
INSERT INTO users (username, password, role)
VALUES ('admin', crypt('admin', gen_salt('bf', 10)), 'ADMIN')
ON CONFLICT (username) DO NOTHING;