import {
    getAvailableAppointmentDatesToShow,
    getAvailableDatesFromProviderDays,
} from "./schedule-helper";

describe("getAvailableDatesFromProviderDays", () => {
    test("returns sorted dates that have at least one time slot", () => {
        const days = [
            { date: "2026-06-16", timeSlots: [{ id: "a" }] },
            { date: "2026-06-11", timeSlots: [] },
            { date: "2026-06-14", timeSlots: [{ id: "b" }, { id: "c" }] },
        ];

        expect(getAvailableDatesFromProviderDays(days)).toEqual(["2026-06-14", "2026-06-16"]);
    });

    test("returns an empty array when days is null or undefined", () => {
        expect(getAvailableDatesFromProviderDays(null)).toEqual([]);
        expect(getAvailableDatesFromProviderDays(undefined)).toEqual([]);
    });
});

describe("getAvailableAppointmentDatesToShow", () => {
    const selectedDate = "2026-06-15";

    test("AC1: happy path", () => {
        const available = [
            "2026-06-11",
            "2026-06-12",
            "2026-06-13",
            "2026-06-14",
            "2026-06-16",
            "2026-06-17",
            "2026-06-18",
            "2026-06-19",
            "2026-06-20",
        ];

        expect(getAvailableAppointmentDatesToShow(available, selectedDate)).toEqual([
            "2026-06-11",
            "2026-06-14",
            "2026-06-16",
        ]);
    });

    test("AC2: no previous dates available", () => {
        const available = ["2026-06-16", "2026-06-17", "2026-06-18", "2026-06-19", "2026-06-20"];

        expect(getAvailableAppointmentDatesToShow(available, selectedDate)).toEqual([
            "2026-06-16",
            "2026-06-17",
            "2026-06-18",
        ]);
    });

    test("AC3: no next dates available", () => {
        const available = [
            "2026-06-09",
            "2026-06-10",
            "2026-06-11",
            "2026-06-12",
            "2026-06-13",
            "2026-06-14",
        ];

        expect(getAvailableAppointmentDatesToShow(available, selectedDate)).toEqual([
            "2026-06-09",
            "2026-06-10",
            "2026-06-14",
        ]);
    });

    test("AC4: only one previous date available and it matches earliest", () => {
        const available = [
            "2026-06-11",
            "2026-06-16",
            "2026-06-17",
            "2026-06-18",
            "2026-06-19",
            "2026-06-20",
        ];

        expect(getAvailableAppointmentDatesToShow(available, selectedDate)).toEqual([
            "2026-06-11",
            "2026-06-16",
            "2026-06-17",
        ]);
    });

    test("AC5: no dates available", () => {
        expect(getAvailableAppointmentDatesToShow([], selectedDate)).toEqual([]);
        expect(getAvailableAppointmentDatesToShow([""], selectedDate)).toEqual([]);
        expect(getAvailableAppointmentDatesToShow([], null)).toEqual([]);
    });

    test("AC6: only one date available", () => {
        expect(getAvailableAppointmentDatesToShow(["2026-06-13"], selectedDate)).toEqual([
            "2026-06-13",
        ]);
    });

    test("AC7: only two dates available", () => {
        expect(
            getAvailableAppointmentDatesToShow(["2026-06-11", "2026-06-12"], selectedDate)
        ).toEqual(["2026-06-11", "2026-06-12"]);
    });
});