import { describe, expect, it } from "vitest";
import { ABSENCE_TYPES, absenceLabel, isAbsenceType, statusLabel } from "@/lib/absence";

// The stored employment status is still 'Karenz' — renaming the enum value
// would mean rewriting every stored function that spells it. The rename
// therefore lives entirely in this mapping, which makes it the one thing
// standing between the database value and what an HR user reads.
describe("statusLabel", () => {
  it("renders the stored 'Karenz' value as Langzeitabwesenheit", () => {
    expect(statusLabel("Karenz")).toBe("Langzeitabwesenheit");
  });

  it("leaves the other statuses alone", () => {
    expect(statusLabel("Aktiv")).toBe("Aktiv");
    expect(statusLabel("Geplant")).toBe("Geplant");
    expect(statusLabel("Ausgetreten")).toBe("Ausgetreten");
  });
});

describe("absenceLabel", () => {
  it("shows the specific kind when one is recorded", () => {
    expect(absenceLabel("Karenz", "Bildungskarenz")).toBe("Bildungskarenz");
    expect(absenceLabel("Karenz", "Präsenzdienst")).toBe("Präsenzdienst");
  });

  it("falls back to the generic name for absences recorded before the field existed", () => {
    expect(absenceLabel("Karenz", null)).toBe("Langzeitabwesenheit");
    expect(absenceLabel("Karenz", "")).toBe("Langzeitabwesenheit");
  });

  it("ignores a type that is not on the list rather than displaying it", () => {
    // The column has a check constraint, but the value arrives here as a
    // plain string — echoing an unknown one would put unvalidated text in
    // the status chip.
    expect(absenceLabel("Karenz", "Ausgedachte Karenz")).toBe("Langzeitabwesenheit");
  });

  it("ignores the absence type entirely for any other status", () => {
    expect(absenceLabel("Aktiv", "Sabbatical")).toBe("Aktiv");
    expect(absenceLabel("Ausgetreten", "Papamonat")).toBe("Ausgetreten");
  });
});

describe("ABSENCE_TYPES", () => {
  it("holds the thirteen kinds, in the order they are offered", () => {
    expect(ABSENCE_TYPES).toHaveLength(13);
    expect(ABSENCE_TYPES[0]).toBe("Wochenhilfe (Mutterschutz)");
    expect(ABSENCE_TYPES.at(-1)).toBe("Sabbatical");
  });

  it("guards every entry with isAbsenceType", () => {
    for (const t of ABSENCE_TYPES) expect(isAbsenceType(t)).toBe(true);
    expect(isAbsenceType("Karenz")).toBe(false);
    expect(isAbsenceType(null)).toBe(false);
  });
});