/**
 * Unit tests for getDutyMarkerRows and buildDutyItemTimePrefix logic.
 * Covers: sorting order preservation, idx=0 with total>1 and startSameDay.
 */

import { describe, it, expect, beforeAll } from "vitest";
import { getDutyMarkerRows } from "./hints.js";

const FROM = "from";
const TO = "until";
const SEP = "\u00a0";

describe("getDutyMarkerRows", () => {
  beforeAll(() => {
    document.body.innerHTML = '<div id="calendar"></div>';
  });

  it("preserves input order (caller must sort by start_at before passing)", () => {
    const hintDay = "2025-02-25";
    const duties = [
      {
        full_name: "Иванов",
        start_at: "2025-02-25T14:00:00",
        end_at: "2025-02-25T18:00:00",
      },
      {
        full_name: "Петров",
        start_at: "2025-02-25T09:00:00",
        end_at: "2025-02-25T14:00:00",
      },
    ];
    const rows = getDutyMarkerRows(duties, hintDay, SEP, FROM, TO);
    expect(rows).toHaveLength(2);
    expect(rows[0].fullName).toBe("Иванов");
    expect(rows[1].fullName).toBe("Петров");
  });

  it("first of multiple with startSameDay shows full range (from HH:MM to HH:MM)", () => {
    const hintDay = "2025-02-25";
    const duties = [
      {
        full_name: "Иванов",
        start_at: "2025-02-25T09:00:00",
        end_at: "2025-02-25T14:00:00",
      },
      {
        full_name: "Петров",
        start_at: "2025-02-25T14:00:00",
        end_at: "2025-02-25T18:00:00",
      },
    ].sort((a, b) => new Date(a.start_at) - new Date(b.start_at));

    const rows = getDutyMarkerRows(duties, hintDay, SEP, FROM, TO);
    expect(rows).toHaveLength(2);
    expect(rows[0].fullName).toBe("Иванов");
    expect(rows[0].timePrefix).toContain("09:00");
    expect(rows[0].timePrefix).toContain("14:00");
    expect(rows[0].timePrefix).toContain(FROM);
    expect(rows[0].timePrefix).toContain(TO);
  });

  it("first of multiple continuation from previous day shows only end time", () => {
    const hintDay = "2025-02-25";
    const duties = [
      {
        full_name: "Иванов",
        start_at: "2025-02-24T22:00:00",
        end_at: "2025-02-25T06:00:00",
      },
      {
        full_name: "Петров",
        start_at: "2025-02-25T09:00:00",
        end_at: "2025-02-25T14:00:00",
      },
    ].sort((a, b) => new Date(a.start_at) - new Date(b.start_at));

    const rows = getDutyMarkerRows(duties, hintDay, SEP, FROM, TO);
    expect(rows).toHaveLength(2);
    expect(rows[0].fullName).toBe("Иванов");
    expect(rows[0].timePrefix).not.toContain(FROM);
    expect(rows[0].timePrefix).toContain(TO);
    expect(rows[0].timePrefix).toContain("06:00");
  });

  it("multiple duties in one day — correct order when input is pre-sorted", () => {
    const hintDay = "2025-02-25";
    const duties = [
      { full_name: "A", start_at: "2025-02-25T09:00:00", end_at: "2025-02-25T12:00:00" },
      { full_name: "B", start_at: "2025-02-25T12:00:00", end_at: "2025-02-25T15:00:00" },
      { full_name: "C", start_at: "2025-02-25T15:00:00", end_at: "2025-02-25T18:00:00" },
    ].sort((a, b) => new Date(a.start_at) - new Date(b.start_at));

    const rows = getDutyMarkerRows(duties, hintDay, SEP, FROM, TO);
    expect(rows.map((r) => r.fullName)).toEqual(["A", "B", "C"]);
    expect(rows[0].timePrefix).toContain("09:00");
    expect(rows[1].timePrefix).toContain("12:00");
    expect(rows[2].timePrefix).toContain("15:00");
  });
});