import { z } from "zod";
import { validationMessage } from "@/shared/i18n";

const ASCII_SPACE = 32;
const ASCII_DELETE = 127;
const MAX_EMAIL_LENGTH = 254;
const MIN_PASSWORD_BYTES = 12;
const MAX_PASSWORD_BYTES = 72;

function isEmailCharacterInvalid(character: string): boolean {
	return (
		/\s/.test(character) ||
		character.charCodeAt(0) < ASCII_SPACE ||
		character.charCodeAt(0) === ASCII_DELETE
	);
}

const email = z
	.string()
	.trim()
	.toLowerCase()
	.max(MAX_EMAIL_LENGTH)
	.refine(
		(value) =>
			value.split("@").length === 2 &&
			value.split("@").every(Boolean) &&
			!value.split("").some(isEmailCharacterInvalid),
		validationMessage("auth.validation.invalidEmail"),
	);
const password = z
	.string()
	.refine(
		(value) =>
			new TextEncoder().encode(value).length >= MIN_PASSWORD_BYTES &&
			new TextEncoder().encode(value).length <= MAX_PASSWORD_BYTES,
		validationMessage("auth.validation.invalidPasswordLength"),
	);

const loginSchema = z.object({
	email,
	password,
	passwordConfirmation: z.string().optional(),
});
const registerSchema = loginSchema.refine(
	(value) => value.password === value.passwordConfirmation,
	(value) => ({
		path: ["passwordConfirmation"],
		...validationMessage("auth.validation.passwordsDoNotMatch")(value),
	}),
);

type AuthFormValues = z.input<typeof loginSchema>;

export { type AuthFormValues, loginSchema, registerSchema };