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
) STRICT;

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 security_permissions
(
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    security_id   INTEGER NOT NULL,
    user_id       INTEGER NOT NULL,
    creation_time DATETIME DEFAULT CURRENT_TIMESTAMP,

    FOREIGN KEY (security_id) REFERENCES securities (id),
    FOREIGN KEY (user_id) REFERENCES users (id)

);

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 cashed_cheques
(
    id                  INTEGER PRIMARY KEY AUTOINCREMENT,
    drawer_user_id      INTEGER NOT NULL,
    drawer_account_id   INTEGER,
    cheque_number       INTEGER NOT NULL,
    amount              INTEGER NOT NULL,
    underlying_security INTEGER NOT NULL,
    creation_time       DATETIME DEFAULT CURRENT_TIMESTAMP,


    FOREIGN KEY (underlying_security) REFERENCES securities (id),
    FOREIGN KEY (drawer_user_id) REFERENCES users (id),
    FOREIGN KEY (drawer_account_id) REFERENCES accounts (id)
);