#!/usr/bin/env node
// Local patch: make the minimum length for newly created character names
// configurable.
//
// Upstream's is_name_allowed() rejects names shorter than 4 characters, while
// is_name_xallowed() already accepts 1-12 for rename, chat and login. Three
// character names are therefore fully supported; the 4-character gate only
// applies to character creation and makes them a paid rename target (24,000
// shells). This patch reads options.character_name_min_length (default 4) so a
// local server can allow 3-character names at creation without changing the
// rename rules or prices.
//
// The patch is idempotent and fails loudly if the anchor is gone.

const fs = require("node:fs");
const path = require("node:path");

const app = path.resolve(process.argv[2] || "/app");
const file = path.join(app, "api.js");
let source = fs.readFileSync(file, "utf8");

const oldLine = "\tif (name.length < 4) return false;";
const newLines = [
	"\tvar min_length =",
	'\t\ttypeof options === "undefined" || !options || options.character_name_min_length === undefined',
	"\t\t\t? 4",
	"\t\t\t: Number(options.character_name_min_length);",
	"\tif (!Number.isSafeInteger(min_length) || min_length < 1 || min_length > 12) min_length = 4;",
	"\tif (name.length < min_length) return false;",
].join("\n");

function fail(message) {
	console.error("patch-character-name-length: " + message);
	process.exit(1);
}

const marker = "options.character_name_min_length";
const oldCount = source.split(oldLine).length - 1;
const patchedCount = source.split("if (name.length < min_length) return false;").length - 1;

if (oldCount === 1 && patchedCount === 0) {
	source = source.replace(oldLine, newLines);
	fs.writeFileSync(file, source);
	console.log("patch-character-name-length: patched " + file);
} else if (oldCount === 0 && patchedCount === 1 && source.includes(marker)) {
	console.log("patch-character-name-length: already patched");
} else {
	fail(
		"expected 1 unpatched creation length check, found " +
			oldCount +
			" unpatched and " +
			patchedCount +
			" patched; refusing partial patch",
	);
}