CREATE TABLE IF NOT EXISTS users
(
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    name          TEXT NOT NULL,
    public_key    TEXT NOT NULL,
    creation_time DATETIME DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS security_types
(
    name TEXT PRIMARY KEY
);

INSERT INTO security_types(name)
VALUES ('currency'), ('bond');

CREATE TABLE IF NOT EXISTS securities
(
    id             INTEGER PRIMARY KEY AUTOINCREMENT,
    security_type  TEXT NOT NULL,
    name           TEXT NOT NULL UNIQUE,
    symbol         TEXT NOT NULL UNIQUE,
    creation_time  DATETIME DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (security_type) REFERENCES security_types (name)
);

CREATE TABLE IF NOT EXISTS accounts
(
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    security      INTEGER  NOT NULL,
    owner         INTEGER  NOT NULL,
    amount        INTEGER  NOT NULL,
    timestamp     DATETIME NOT NULL,
    creation_time DATETIME DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (security) REFERENCES securities (id),
    FOREIGN KEY (owner) REFERENCES users (id)
);

CREATE TABLE IF NOT EXISTS account_values
(
    id INTEGER PRIMARY KEY AUTOINCREMENT
);