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: "字元", verb: "擁有" },
    file: { unit: "位元組", verb: "擁有" },
    array: { unit: "項目", verb: "擁有" },
    set: { unit: "項目", verb: "擁有" },
  };

  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" : "number";
      }
      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: "輸入",
    email: "郵件地址",
    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 日期時間",
    date: "ISO 日期",
    time: "ISO 時間",
    duration: "ISO 期間",
    ipv4: "IPv4 位址",
    ipv6: "IPv6 位址",
    cidrv4: "IPv4 範圍",
    cidrv6: "IPv6 範圍",
    base64: "base64 編碼字串",
    base64url: "base64url 編碼字串",
    json_string: "JSON 字串",
    e164: "E.164 數值",
    jwt: "JWT",
    template_literal: "輸入",
  };

  return (issue) => {
    switch (issue.code) {
      case "invalid_type":
        return `無效的輸入值：預期為 ${issue.expected}，但收到 ${parsedType(issue.input)}`;
      case "invalid_value":
        if (issue.values.length === 1) return `無效的輸入值：預期為 ${util.stringifyPrimitive(issue.values[0])}`;
        return `無效的選項：預期為以下其中之一 ${util.joinValues(issue.values, "|")}`;
      case "too_big": {
        const adj = issue.inclusive ? "<=" : "<";
        const sizing = getSizing(issue.origin);
        if (sizing)
          return `數值過大：預期 ${issue.origin ?? "值"} 應為 ${adj}${issue.maximum.toString()} ${sizing.unit ?? "個元素"}`;
        return `數值過大：預期 ${issue.origin ?? "值"} 應為 ${adj}${issue.maximum.toString()}`;
      }
      case "too_small": {
        const adj = issue.inclusive ? ">=" : ">";
        const sizing = getSizing(issue.origin);
        if (sizing) {
          return `數值過小：預期 ${issue.origin} 應為 ${adj}${issue.minimum.toString()} ${sizing.unit}`;
        }
        return `數值過小：預期 ${issue.origin} 應為 ${adj}${issue.minimum.toString()}`;
      }
      case "invalid_format": {
        const _issue = issue as errors.$ZodStringFormatIssues;
        if (_issue.format === "starts_with") {
          return `無效的字串：必須以 "${_issue.prefix}" 開頭`;
        }
        if (_issue.format === "ends_with") return `無效的字串：必須以 "${_issue.suffix}" 結尾`;
        if (_issue.format === "includes") return `無效的字串：必須包含 "${_issue.includes}"`;
        if (_issue.format === "regex") return `無效的字串：必須符合格式 ${_issue.pattern}`;
        return `無效的 ${Nouns[_issue.format] ?? issue.format}`;
      }
      case "not_multiple_of":
        return `無效的數字：必須為 ${issue.divisor} 的倍數`;
      case "unrecognized_keys":
        return `無法識別的鍵值${issue.keys.length > 1 ? "們" : ""}：${util.joinValues(issue.keys, "、")}`;
      case "invalid_key":
        return `${issue.origin} 中有無效的鍵值`;
      case "invalid_union":
        return "無效的輸入值";
      case "invalid_element":
        return `${issue.origin} 中有無效的值`;
      default:
        return `無效的輸入值`;
    }
  };
};

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