import { describe, it, expect } from "vitest";
import { detectName } from "./name.js";

describe("Korean name detection", () => {
  it("detects common Korean names", () => {
    expect(detectName("김철수 님")).toHaveLength(1);
    expect(detectName("이영희 입니다")).toHaveLength(1);
    expect(detectName("박민수")).toHaveLength(1);
  });

  it("detects names with various top surnames", () => {
    expect(detectName("최지원")).toHaveLength(1);
    expect(detectName("정하나")).toHaveLength(1);
    expect(detectName("강민호")).toHaveLength(1);
  });

  it("detects 2-char names (surname + 1 char)", () => {
    expect(detectName("김솔")).toHaveLength(1);
    expect(detectName("이준")).toHaveLength(1);
  });

  it("rejects single character (surname only)", () => {
    // "김" alone is just a surname, not a full name
    expect(detectName("김 입니다")).toHaveLength(0);
  });

  it("detects multiple names in text", () => {
    const r = detectName("김철수와 이영희가 만났다");
    expect(r).toHaveLength(2);
  });

  it("has lower confidence than other PII types", () => {
    const r = detectName("김철수");
    if (r.length > 0) {
      expect(r[0].confidence).toBeLessThan(0.8);
    }
  });

  it("returns empty for non-Korean text", () => {
    expect(detectName("John Smith")).toHaveLength(0);
    expect(detectName("hello world")).toHaveLength(0);
  });

  it("excludes common Korean words that start with surname chars", () => {
    // These words start with top surnames but are not names
    expect(detectName("오늘")).toHaveLength(0);
    expect(detectName("전화")).toHaveLength(0);
    expect(detectName("서버")).toHaveLength(0);
    expect(detectName("주소")).toHaveLength(0);
    expect(detectName("한국")).toHaveLength(0);
    expect(detectName("고객")).toHaveLength(0);
    expect(detectName("최근")).toHaveLength(0);
    expect(detectName("문제")).toHaveLength(0);
    expect(detectName("안내")).toHaveLength(0);
    expect(detectName("신청")).toHaveLength(0);
  });

  it("still detects real names despite exclusion list", () => {
    // These are valid names, not in the exclusion list
    expect(detectName("오세진")).toHaveLength(1);
    expect(detectName("전지현")).toHaveLength(1);
    expect(detectName("서연우")).toHaveLength(1);
  });
});