import type { $ZodStringFormats } from "../core/checks.js";
import type * as errors from "../core/errors.js";
import * as util from "../core/util.js";

const error: () => errors.$ZodErrorMap = () => {
  const Sizable: Record<string, { unit: string; verb: string }> = {
    string: { unit: "Zeichen", verb: "zu haben" },
    file: { unit: "Bytes", verb: "zu haben" },
    array: { unit: "Elemente", verb: "zu haben" },
    set: { unit: "Elemente", verb: "zu haben" },
  };

  function getSizing(origin: string): { unit: string; verb: string } | null {
    return Sizable[origin] ?? null;
  }

  const parsedType = (data: any): string => {
    const t = typeof data;

    switch (t) {
      case "number": {
        return Number.isNaN(data) ? "NaN" : "Zahl";
      }
      case "object": {
        if (Array.isArray(data)) {
          return "Array";
        }
        if (data === null) {
          return "null";
        }

        if (Object.getPrototypeOf(data) !== Object.prototype && data.constructor) {
          return data.constructor.name;
        }
      }
    }
    return t;
  };

  const Nouns: {
    [k in $ZodStringFormats | (string & {})]?: string;
  } = {
    regex: "Eingabe",
    email: "E-Mail-Adresse",
    url: "URL",
    emoji: "Emoji",
    uuid: "UUID",
    uuidv4: "UUIDv4",
    uuidv6: "UUIDv6",
    nanoid: "nanoid",
    guid: "GUID",
    cuid: "cuid",
    cuid2: "cuid2",
    ulid: "ULID",
    xid: "XID",
    ksuid: "KSUID",
    datetime: "ISO-Datum und -Uhrzeit",
    date: "ISO-Datum",
    time: "ISO-Uhrzeit",
    duration: "ISO-Dauer",
    ipv4: "IPv4-Adresse",
    ipv6: "IPv6-Adresse",
    cidrv4: "IPv4-Bereich",
    cidrv6: "IPv6-Bereich",
    base64: "Base64-codierter String",
    base64url: "Base64-URL-codierter String",
    json_string: "JSON-String",
    e164: "E.164-Nummer",
    jwt: "JWT",
    template_literal: "Eingabe",
  };

  return (issue) => {
    switch (issue.code) {
      case "invalid_type":
        return `Ungültige Eingabe: erwartet ${issue.expected}, erhalten ${parsedType(issue.input)}`;
      case "invalid_value":
        if (issue.values.length === 1) return `Ungültige Eingabe: erwartet ${util.stringifyPrimitive(issue.values[0])}`;
        return `Ungültige Option: erwartet eine von ${util.joinValues(issue.values, "|")}`;
      case "too_big": {
        const adj = issue.inclusive ? "<=" : "<";
        const sizing = getSizing(issue.origin);
        if (sizing)
          return `Zu groß: erwartet, dass ${issue.origin ?? "Wert"} ${adj}${issue.maximum.toString()} ${sizing.unit ?? "Elemente"} hat`;
        return `Zu groß: erwartet, dass ${issue.origin ?? "Wert"} ${adj}${issue.maximum.toString()} ist`;
      }
      case "too_small": {
        const adj = issue.inclusive ? ">=" : ">";
        const sizing = getSizing(issue.origin);
        if (sizing) {
          return `Zu klein: erwartet, dass ${issue.origin} ${adj}${issue.minimum.toString()} ${sizing.unit} hat`;
        }

        return `Zu klein: erwartet, dass ${issue.origin} ${adj}${issue.minimum.toString()} ist`;
      }
      case "invalid_format": {
        const _issue = issue as errors.$ZodStringFormatIssues;
        if (_issue.format === "starts_with") return `Ungültiger String: muss mit "${_issue.prefix}" beginnen`;
        if (_issue.format === "ends_with") return `Ungültiger String: muss mit "${_issue.suffix}" enden`;
        if (_issue.format === "includes") return `Ungültiger String: muss "${_issue.includes}" enthalten`;
        if (_issue.format === "regex") return `Ungültiger String: muss dem Muster ${_issue.pattern} entsprechen`;
        return `Ungültig: ${Nouns[_issue.format] ?? issue.format}`;
      }
      case "not_multiple_of":
        return `Ungültige Zahl: muss ein Vielfaches von ${issue.divisor} sein`;
      case "unrecognized_keys":
        return `${issue.keys.length > 1 ? "Unbekannte Schlüssel" : "Unbekannter Schlüssel"}: ${util.joinValues(issue.keys, ", ")}`;
      case "invalid_key":
        return `Ungültiger Schlüssel in ${issue.origin}`;
      case "invalid_union":
        return "Ungültige Eingabe";
      case "invalid_element":
        return `Ungültiger Wert in ${issue.origin}`;
      default:
        return `Ungültige Eingabe`;
    }
  };
};

export default function (): { localeError: errors.$ZodErrorMap } {
  return {
    localeError: error(),
  };
}