import { mount } from "@vue/test-utils";
import waitlistQuestion from "./waitlist-question";
import store from "@/store";
import { experimentSettings } from "@/constants/experiments";

jest.mock("@/store", () => ({
    getters: {
        applicationUser: {
            experiments: [],
        },
    },
}));

const MOCK_CMS_CONTENT = {
    WaitListLabelWidget: { Text: "Want to be notified sooner?" },
    WaitListQuestionWidget: { QuestionText: "Add me to the waitlist" },
};

function dateStringOffsetFromToday(offsetDays) {
    const d = new Date();
    d.setDate(d.getDate() + offsetDays);
    return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(
        d.getDate()
    ).padStart(2, "0")}`;
}

function enableWaitlistExperiment(thresholdDays = 0) {
    store.getters.applicationUser.experiments = [
        {
            isActive: true,
            settings: {
                [experimentSettings.DISPLAY_WAITLIST]: "true",
                [experimentSettings.WAITLIST_THRESHOLD_DAYS]: String(thresholdDays),
            },
        },
    ];
}

function mountComponent(props = {}) {
    const cmsMixin = {
        methods: {
            getCmsContent: jest.fn((widgetName, fieldName) => {
                return MOCK_CMS_CONTENT[widgetName]?.[fieldName] ?? "";
            }),
        },
    };

    return mount(waitlistQuestion, {
        props: {
            modelValue: false,
            availableDates: [dateStringOffsetFromToday(10)],
            ...props,
        },
        global: {
            mixins: [cmsMixin],
        },
    });
}

describe("waitlist-question.vue", () => {
    beforeEach(() => {
        enableWaitlistExperiment();
    });

    afterEach(() => {
        store.getters.applicationUser.experiments = [];
    });

    it("renders the label and checkbox CMS content", () => {
        const wrapper = mountComponent();

        expect(wrapper.text()).toContain("Want to be notified sooner?");
        expect(wrapper.text()).toContain("Add me to the waitlist");
    });

    it("reflects the modelValue prop on the checkbox", () => {
        const wrapper = mountComponent({ modelValue: true });

        expect(wrapper.find("input[type='checkbox']").element.checked).toBe(true);
    });

    it("emits update:modelValue with true when the checkbox is checked", async () => {
        const wrapper = mountComponent({ modelValue: false });

        const input = wrapper.find("input[type='checkbox']");
        await input.setValue(true);

        expect(wrapper.emitted("update:modelValue")).toEqual([[true]]);
    });

    it("emits update:modelValue with false when the checkbox is unchecked", async () => {
        const wrapper = mountComponent({ modelValue: true });

        const input = wrapper.find("input[type='checkbox']");
        await input.setValue(false);

        expect(wrapper.emitted("update:modelValue")).toEqual([[false]]);
    });

    it("renders nothing when shouldDisplay is false", () => {
        store.getters.applicationUser.experiments = [];

        const wrapper = mountComponent();

        expect(wrapper.find("input[type='checkbox']").exists()).toBe(false);
    });

    describe("clicking the container", () => {
        it("toggles localValue to true when clicking outside the checkbox", async () => {
            const wrapper = mountComponent({ modelValue: false });

            await wrapper.find(".waitlist-label").trigger("click");

            expect(wrapper.emitted("update:modelValue")).toEqual([[true]]);
        });

        it("toggles localValue to false when clicking outside the checkbox", async () => {
            const wrapper = mountComponent({ modelValue: true });

            await wrapper.find(".waitlist-question").trigger("click");

            expect(wrapper.emitted("update:modelValue")).toEqual([[false]]);
        });

        it("does not toggle when the click target is the checkbox input itself", () => {
            // jsdom doesn't reliably run a checkbox's native activation behavior
            // (toggling + firing "change") for script-dispatched clicks, so this
            // calls the handler directly with the real input element as the
            // event target to verify the guard is skipped in that case.
            const wrapper = mountComponent({ modelValue: false });
            const inputElement = wrapper.find("input[type='checkbox']").element;

            wrapper.vm.handleContainerClick({ target: inputElement });

            expect(wrapper.emitted("update:modelValue")).toBeUndefined();
        });

        it("does not toggle when the click lands inside the checkbox wrapper but not on the input", async () => {
            const wrapper = mountComponent({ modelValue: false });

            await wrapper.find(".ui-checkbox").trigger("click");

            expect(wrapper.emitted("update:modelValue")).toBeUndefined();
        });
    });

    describe("shouldDisplay", () => {
        it("is false when the DISPLAY_WAITLIST experiment is off", () => {
            store.getters.applicationUser.experiments = [
                {
                    isActive: true,
                    settings: { [experimentSettings.WAITLIST_THRESHOLD_DAYS]: "3" },
                },
            ];

            const wrapper = mountComponent({ availableDates: [dateStringOffsetFromToday(10)] });

            expect(wrapper.vm.shouldDisplay).toBe(false);
        });

        it("is false when the earliest available date is within the threshold", () => {
            enableWaitlistExperiment(3);

            const wrapper = mountComponent({ availableDates: [dateStringOffsetFromToday(2)] });

            expect(wrapper.vm.shouldDisplay).toBe(false);
        });

        it("is true when the experiment is on and the earliest available date exceeds the threshold", () => {
            enableWaitlistExperiment(3);

            const wrapper = mountComponent({ availableDates: [dateStringOffsetFromToday(10)] });

            expect(wrapper.vm.shouldDisplay).toBe(true);
        });

        it("is false when there are no available dates", () => {
            enableWaitlistExperiment(0);

            const wrapper = mountComponent({ availableDates: [] });

            expect(wrapper.vm.shouldDisplay).toBe(false);
        });
    });
});