import { useState } from "react";
import { z, type RefinementCtx } from "zod/v4";
import { useTranslation } from "~/providers/I18nProvider";

export const zStrongPassword = z.string().superRefine((password, ctx) => {
  const test = [/.{8,}/, /[0-9]/, /[a-z]/, /[A-Z]/].every((regex) =>
    regex.test(password),
  );
  if (!test) {
    ctx.addIssue({
      code: "custom",
      message:
        "La password deve contenere almeno 8 caratteri, un numero, una lettera minuscola e una maiuscola.",
    });
  }
});

export const useStrongPassword = () => {
  const { t } = useTranslation();

  const [isVisible, setIsVisible] = useState<boolean>(false);
  const [strengthScore, setStrengthScore] = useState(0);

  const checkStrength = (pass: string) => {
    const requirements = [
      { regex: /.{8,}/, text: t.auth.signup.pw.lenght },
      { regex: /[0-9]/, text: t.auth.signup.pw.number },
      { regex: /[a-z]/, text: t.auth.signup.pw.lowercase },
      { regex: /[A-Z]/, text: t.auth.signup.pw.uppercase },
    ];

    return requirements.map((req) => ({
      met: req.regex.test(pass),
      text: req.text,
    }));
  };

  const getStrengthColor = (score: number) => {
    if (score === 0) return "bg-border";
    if (score <= 1) return "bg-red-500";
    if (score <= 2) return "bg-orange-500";
    if (score === 3) return "bg-amber-500";
    return "bg-emerald-500";
  };
  const getStrengthTxt = (score: number) => {
    if (score === 0) return "text-border";
    if (score <= 1) return "text-red-500";
    if (score <= 2) return "text-orange-500";
    if (score === 3) return "text-amber-500";
    return "text-emerald-500";
  };

  const toggleVisibility = () => setIsVisible((prevState) => !prevState);

  const passwordRefine = ({
    password,
    refinementContext,
    path,
  }: {
    password: string;
    refinementContext: RefinementCtx;
    path: string;
  }) => {
    const complexity = checkStrength(password);

    if (complexity.filter((req) => req.met).length !== complexity.length) {
      refinementContext.issues.push({
        code: "custom",
        message: complexity
          .filter((req) => !req.met)
          .map((req) => req.text)
          .join("\n"),
        path: [path],
        input: "",
      });
    }
    setStrengthScore(complexity.filter((req) => req.met).length);
  };

  return {
    isVisible,
    strengthScore,
    getStrengthColor,
    getStrengthTxt,
    toggleVisibility,
    passwordRefine,
  };
};