DROP TABLE beacon_command_invocation;
DROP TABLE beacon_command;

CREATE TABLE beacon_file (
    file_id varchar PRIMARY KEY NOT NULL,

    file_name varchar,

    beacon_source_id varchar,

    FOREIGN KEY (beacon_source_id) REFERENCES beacon_instance
);

CREATE TABLE beacon_command (
    command_id integer PRIMARY KEY AUTOINCREMENT NOT NULL,

    cmd_type text check (cmd_type in ('update', 'exec', 'install', 'upload', 'download', 'chdir', 'ls')),

    exec_command varchar,

    install_target varchar,

    upload_src varchar,

    download_src varchar,
    download_path varchar,

    chdir_target varchar,

    FOREIGN KEY (download_src) REFERENCES beacon_file
);

CREATE TABLE beacon_command_invocation (
    beacon_id varchar NOT NULL,
    command_id int NOT NULL,

    issue_date int NOT NULL,

    invoker_id int NOT NULL,

    invocation_date int,
    invocation_result varchar,

    PRIMARY KEY (beacon_id, command_id),

    FOREIGN KEY (command_id) REFERENCES beacon_command,
    FOREIGN KEY (beacon_id) REFERENCES beacon_instance,
    FOREIGN KEY (invoker_id) REFERENCES users
);