import { moment } from "obsidian";
import { adjectives } from "adjectives.js";
import { capitalize, sample } from "lodash-es";
import { nouns } from "nouns.js";

interface FormatOptions {
	ext?: string;
}

export function format(str: string, options?: FormatOptions): string {
	let formatted = str.trim();

	let extension = options?.ext ?? "";
	if (extension.length > 0 && !extension.startsWith(".")) {
		extension = `.${extension}`;
	}

	// Replace {N} with a random noun
	formatted = formatted.replace(/{N}/g, () => {
		return capitalize(sample(nouns));
	});

	// Replace {n} with a random noun (lower case)
	formatted = formatted.replace(/{n}/g, () => {
		return sample(nouns);
	});

	// Replace {A} with a random adjective
	formatted = formatted.replace(/{A}/g, () => {
		return capitalize(sample(adjectives));
	});

	// Replace {a} with a random adjective (lower case)
	formatted = formatted.replace(/{a}/g, () => {
		return sample(adjectives);
	});

	// Replace {MW} with the current month week
	const monthWeek = `${Math.ceil(new Date().getDate() / 7)}`;
	formatted = formatted.replace(/{MW}/g, monthWeek);

	// Replace {time <moment format>} with the moment-formatted string
	formatted = formatted.replace(
		/{time (.+?)}/g,
		(_: string, pattern: string) => {
			return moment().format(pattern);
		}
	);

	return formatted + extension;
}