// internal-logging.ts

// FIXME: Move this to somewhere more appropriate
type AtLeastOne<T> = [T, ...T[]];

type MessageSource = "logging" | "diagnostic" | "user";

type Message = {
    // FIXME: number probably isn't what we want here
    timestamp?: number;
    source: MessageSource;

    text: AtLeastOne<string>;
};

const m1: Message = { timestamp: 123, source: "logging", text: ["foo"] };
const m2: Message = {
    timestamp: 321,
    source: "diagnostic",
    text: ["ok", "whatever"],
};

type FilterArgument = {
    limit?: number;
    before?: number;
    after?: number;

    // FIXME: add offsets to use instead of or in addition to before/after

    match?: (string | RegExp)[];
};

const log = (_message: Message) => {
    // WRITEME
};

const getLogs = (filter: FilterArgument) => {
    // WRITEME
};

// FIXME: there's scope for more specialized functions although they
// probably should be defined in terms of the basic ones here.

export { getLogs, log };