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: "tegn", verb: "havde" },
    file: { unit: "bytes", verb: "havde" },
    array: { unit: "elementer", verb: "indeholdt" },
    set: { unit: "elementer", verb: "indeholdt" },
  };

  const TypeNames: Record<string, string> = {
    string: "streng",
    number: "tal",
    boolean: "boolean",
    array: "liste",
    object: "objekt",
    set: "sæt",
    file: "fil",
  };

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

  function getTypeName(type: string): string {
    return TypeNames[type] ?? type;
  }

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

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

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

  const Nouns: {
    [k in $ZodStringFormats | (string & {})]?: string;
  } = {
    regex: "input",
    email: "e-mailadresse",
    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 dato- og klokkeslæt",
    date: "ISO-dato",
    time: "ISO-klokkeslæt",
    duration: "ISO-varighed",
    ipv4: "IPv4-område",
    ipv6: "IPv6-område",
    cidrv4: "IPv4-spektrum",
    cidrv6: "IPv6-spektrum",
    base64: "base64-kodet streng",
    base64url: "base64url-kodet streng",
    json_string: "JSON-streng",
    e164: "E.164-nummer",
    jwt: "JWT",
    template_literal: "input",
  };

  return (issue) => {
    switch (issue.code) {
      case "invalid_type":
        return `Ugyldigt input: forventede ${getTypeName(issue.expected)}, fik ${getTypeName(parsedType(issue.input))}`;
      case "invalid_value":
        if (issue.values.length === 1) return `Ugyldig værdi: forventede ${util.stringifyPrimitive(issue.values[0])}`;
        return `Ugyldigt valg: forventede en af følgende ${util.joinValues(issue.values, "|")}`;
      case "too_big": {
        const adj = issue.inclusive ? "<=" : "<";
        const sizing = getSizing(issue.origin);
        const origin = getTypeName(issue.origin);
        if (sizing)
          return `For stor: forventede ${origin ?? "value"} ${sizing.verb} ${adj} ${issue.maximum.toString()} ${sizing.unit ?? "elementer"}`;
        return `For stor: forventede ${origin ?? "value"} havde ${adj} ${issue.maximum.toString()}`;
      }
      case "too_small": {
        const adj = issue.inclusive ? ">=" : ">";
        const sizing = getSizing(issue.origin);
        const origin = getTypeName(issue.origin);
        if (sizing) {
          return `For lille: forventede ${origin} ${sizing.verb} ${adj} ${issue.minimum.toString()} ${sizing.unit}`;
        }

        return `For lille: forventede ${origin} havde ${adj} ${issue.minimum.toString()}`;
      }
      case "invalid_format": {
        const _issue = issue as errors.$ZodStringFormatIssues;
        if (_issue.format === "starts_with") return `Ugyldig streng: skal starte med "${_issue.prefix}"`;
        if (_issue.format === "ends_with") return `Ugyldig streng: skal ende med "${_issue.suffix}"`;
        if (_issue.format === "includes") return `Ugyldig streng: skal indeholde "${_issue.includes}"`;
        if (_issue.format === "regex") return `Ugyldig streng: skal matche mønsteret ${_issue.pattern}`;
        return `Ugyldig ${Nouns[_issue.format] ?? issue.format}`;
      }
      case "not_multiple_of":
        return `Ugyldigt tal: skal være deleligt med ${issue.divisor}`;
      case "unrecognized_keys":
        return `${issue.keys.length > 1 ? "Ukendte nøgler" : "Ukendt nøgle"}: ${util.joinValues(issue.keys, ", ")}`;
      case "invalid_key":
        return `Ugyldig nøgle i ${issue.origin}`;
      case "invalid_union":
        return "Ugyldigt input: matcher ingen af de tilladte typer";
      case "invalid_element":
        return `Ugyldig værdi i ${issue.origin}`;
      default:
        return `Ugyldigt input`;
    }
  };
};

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