// input validation for server URLs and credentials

// ensure value is always an array
const toArray = (value) =>
	Array.isArray(value) ? value : value ? [value] : [];

// build validation response object
const buildValidation = (valid, value, error) => ({
	valid,
	...(valid ? { value } : { error }),
});

// check if id is present and valid type
function validateId(value, fieldName = "ID") {
	const isValid =
		value && (typeof value === "string" || typeof value === "number");
	return buildValidation(isValid, value, `${fieldName} is required`);
}

// validate server URL is valid HTTP(S) format
function validateServerUrl(url) {
	if (!url || typeof url !== "string") {
		return buildValidation(false, null, STRINGS.SERVER_URL_REQUIRED);
	}

	const trimmed = url.trim();
	if (!trimmed) {
		return buildValidation(false, null, STRINGS.SERVER_URL_EMPTY);
	}

	try {
		const urlObj = new URL(trimmed);
		const isValid = ["http:", "https:"].includes(urlObj.protocol);
		return buildValidation(
			isValid,
			trimmed,
			isValid ? null : "Server URL must use HTTP or HTTPS",
		);
	} catch {
		return buildValidation(false, null, "Invalid URL format");
	}
}

// validate username and password meet requirements
function validateCredentials(username, password) {
	const errors = [];

	if (!username || typeof username !== "string" || !username.trim()) {
		errors.push("Username is required");
	} else if (username.length > 255) {
		errors.push("Username is too long (max 255 characters)");
	}

	if (!password || typeof password !== "string" || !password) {
		errors.push("Password is required");
	} else if (password.length > 1000) {
		errors.push("Password is too long");
	}

	if (errors.length > 0) {
		return buildValidation(false, null, errors.join("; "));
	}

	return buildValidation(true, { username: username.trim(), password });
}