/*
Copyright 2021 - 2022 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import React from "react";
import { fireEvent, render, RenderResult } from "@testing-library/react";
import { MatrixEvent } from "matrix-js-sdk/src/matrix";
import { Relations } from "matrix-js-sdk/src/models/relations";
import {
    M_POLL_KIND_DISCLOSED,
    M_POLL_KIND_UNDISCLOSED,
    M_POLL_RESPONSE,
    M_POLL_START,
    PollStartEventContent,
    PollAnswer,
} from "matrix-js-sdk/src/@types/polls";
import { M_TEXT } from "matrix-js-sdk/src/@types/extensible_events";

import MPollBody, { allVotes, findTopAnswer, isPollEnded } from "../../../../src/components/views/messages/MPollBody";
import { IBodyProps } from "../../../../src/components/views/messages/IBodyProps";
import {
    flushPromises,
    getMockClientWithEventEmitter,
    makePollEndEvent,
    mockClientMethodsUser,
    setupRoomWithPollEvents,
} from "../../../test-utils";
import MatrixClientContext from "../../../../src/contexts/MatrixClientContext";
import { RoomPermalinkCreator } from "../../../../src/utils/permalinks/Permalinks";
import { MediaEventHelper } from "../../../../src/utils/MediaEventHelper";

const CHECKED = "mx_PollOption_checked";
const userId = "@me:example.com";

const mockClient = getMockClientWithEventEmitter({
    ...mockClientMethodsUser(userId),
    sendEvent: jest.fn().mockReturnValue(Promise.resolve({ event_id: "fake_send_id" })),
    getRoom: jest.fn(),
    decryptEventIfNeeded: jest.fn().mockResolvedValue(true),
    relations: jest.fn(),
});

describe("MPollBody", () => {
    beforeEach(() => {
        mockClient.sendEvent.mockClear();

        mockClient.getRoom.mockReturnValue(null);
        mockClient.relations.mockResolvedValue({ events: [] });
    });

    it("finds no votes if there are none", () => {
        expect(allVotes(newVoteRelations([]))).toEqual([]);
    });

    it("renders a loader while responses are still loading", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        // render without waiting for responses
        const renderResult = await newMPollBody(votes, [], undefined, undefined, false);

        // spinner rendered
        expect(renderResult.getByTestId("spinner")).toBeInTheDocument();
    });

    it("renders no votes if none were made", async () => {
        const votes: MatrixEvent[] = [];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("");
        expect(votesCount(renderResult, "poutine")).toBe("");
        expect(votesCount(renderResult, "italian")).toBe("");
        expect(votesCount(renderResult, "wings")).toBe("");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("No votes cast");
        expect(renderResult.getByText("What should we order for the party?")).toBeTruthy();
    });

    it("finds votes from multiple people", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("2 votes");
        expect(votesCount(renderResult, "poutine")).toBe("1 vote");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 4 votes");
    });

    it("ignores end poll events from unauthorised users", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const ends = [newPollEndEvent("@notallowed:example.com", 12)];
        const renderResult = await newMPollBody(votes, ends);

        // Even though an end event was sent, we render the poll as unfinished
        // because this person is not allowed to send these events
        expect(votesCount(renderResult, "pizza")).toBe("2 votes");
        expect(votesCount(renderResult, "poutine")).toBe("1 vote");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 4 votes");
    });

    it("hides scores if I have not voted", async () => {
        const votes = [
            responseEvent("@alice:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("");
        expect(votesCount(renderResult, "poutine")).toBe("");
        expect(votesCount(renderResult, "italian")).toBe("");
        expect(votesCount(renderResult, "wings")).toBe("");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("4 votes cast. Vote to see the results");
    });

    it("hides a single vote if I have not voted", async () => {
        const votes = [responseEvent("@alice:example.com", "pizza")];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("");
        expect(votesCount(renderResult, "poutine")).toBe("");
        expect(votesCount(renderResult, "italian")).toBe("");
        expect(votesCount(renderResult, "wings")).toBe("");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("1 vote cast. Vote to see the results");
    });

    it("takes someone's most recent vote if they voted several times", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", "wings", 20), // latest me
            responseEvent("@qbert:example.com", "pizza", 14),
            responseEvent("@qbert:example.com", "poutine", 16), // latest qbert
            responseEvent("@qbert:example.com", "wings", 15),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("1 vote");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 2 votes");
    });

    it("uses my local vote", async () => {
        // Given I haven't voted
        const votes = [
            responseEvent("@nf:example.com", "pizza", 15),
            responseEvent("@fg:example.com", "pizza", 15),
            responseEvent("@hi:example.com", "pizza", 15),
        ];
        const renderResult = await newMPollBody(votes);

        // When I vote for Italian
        clickOption(renderResult, "italian");

        // My vote is counted
        expect(votesCount(renderResult, "pizza")).toBe("3 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("1 vote");
        expect(votesCount(renderResult, "wings")).toBe("0 votes");

        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 4 votes");
    });

    it("overrides my other votes with my local vote", async () => {
        // Given two of us have voted for Italian
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", "poutine", 13),
            responseEvent("@me:example.com", "italian", 14),
            responseEvent("@nf:example.com", "italian", 15),
        ];
        const renderResult = await newMPollBody(votes);

        // When I click Wings
        clickOption(renderResult, "wings");

        // Then my vote is counted for Wings, and not for Italian
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("1 vote");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");

        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 2 votes");

        // And my vote is highlighted
        expect(voteButton(renderResult, "wings").className.includes(CHECKED)).toBe(true);
        expect(voteButton(renderResult, "italian").className.includes(CHECKED)).toBe(false);
    });

    it("cancels my local vote if another comes in", async () => {
        // Given I voted locally
        const votes = [responseEvent("@me:example.com", "pizza", 100)];
        const mxEvent = new MatrixEvent({
            type: M_POLL_START.name,
            event_id: "$mypoll",
            room_id: "#myroom:example.com",
            content: newPollStart(undefined, undefined, true),
        });
        const props = getMPollBodyPropsFromEvent(mxEvent);
        const room = await setupRoomWithPollEvents([mxEvent], votes, [], mockClient);
        const renderResult = renderMPollBodyWithWrapper(props);
        // wait for /relations promise to resolve
        await flushPromises();
        clickOption(renderResult, "pizza");

        // When a new vote from me comes in
        await room.processPollEvents([responseEvent("@me:example.com", "wings", 101)]);

        // Then the new vote is counted, not the old one
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");

        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 1 vote");
    });

    it("doesn't cancel my local vote if someone else votes", async () => {
        // Given I voted locally
        const votes = [responseEvent("@me:example.com", "pizza")];
        const mxEvent = new MatrixEvent({
            type: M_POLL_START.name,
            event_id: "$mypoll",
            room_id: "#myroom:example.com",
            content: newPollStart(undefined, undefined, true),
        });
        const props = getMPollBodyPropsFromEvent(mxEvent);
        const room = await setupRoomWithPollEvents([mxEvent], votes, [], mockClient);
        const renderResult = renderMPollBodyWithWrapper(props);
        // wait for /relations promise to resolve
        await flushPromises();

        clickOption(renderResult, "pizza");

        // When a new vote from someone else comes in
        await room.processPollEvents([responseEvent("@xx:example.com", "wings", 101)]);

        // Then my vote is still for pizza
        // NOTE: the new event does not affect the counts for other people -
        //       that is handled through the Relations, not by listening to
        //       these timeline events.
        expect(votesCount(renderResult, "pizza")).toBe("1 vote");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");

        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 2 votes");

        // And my vote is highlighted
        expect(voteButton(renderResult, "pizza").className.includes(CHECKED)).toBe(true);
        expect(voteButton(renderResult, "wings").className.includes(CHECKED)).toBe(false);
    });

    it("highlights my vote even if I did it on another device", async () => {
        // Given I voted italian
        const votes = [responseEvent("@me:example.com", "italian"), responseEvent("@nf:example.com", "wings")];
        const renderResult = await newMPollBody(votes);

        // But I didn't click anything locally

        // Then my vote is highlighted, and others are not
        expect(voteButton(renderResult, "italian").className.includes(CHECKED)).toBe(true);
        expect(voteButton(renderResult, "wings").className.includes(CHECKED)).toBe(false);
    });

    it("ignores extra answers", async () => {
        // When cb votes for 2 things, we consider the first only
        const votes = [responseEvent("@cb:example.com", ["pizza", "wings"]), responseEvent("@me:example.com", "wings")];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("1 vote");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("1 vote");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 2 votes");
    });

    it("allows un-voting by passing an empty vote", async () => {
        const votes = [
            responseEvent("@nc:example.com", "pizza", 12),
            responseEvent("@nc:example.com", [], 13),
            responseEvent("@me:example.com", "italian"),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("1 vote");
        expect(votesCount(renderResult, "wings")).toBe("0 votes");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 1 vote");
    });

    it("allows re-voting after un-voting", async () => {
        const votes = [
            responseEvent("@op:example.com", "pizza", 12),
            responseEvent("@op:example.com", [], 13),
            responseEvent("@op:example.com", "italian", 14),
            responseEvent("@me:example.com", "italian"),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("2 votes");
        expect(votesCount(renderResult, "wings")).toBe("0 votes");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 2 votes");
    });

    it("treats any invalid answer as a spoiled ballot", async () => {
        // Note that uy's second vote has a valid first answer, but
        // the ballot is still spoiled because the second answer is
        // invalid, even though we would ignore it if we continued.
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", ["pizza", "doesntexist"], 13),
            responseEvent("@uy:example.com", "italian", 14),
            responseEvent("@uy:example.com", "doesntexist", 15),
        ];
        const renderResult = await newMPollBody(votes);
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("0 votes");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("0 votes");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 0 votes");
    });

    it("allows re-voting after a spoiled ballot", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", ["pizza", "doesntexist"], 13),
            responseEvent("@uy:example.com", "italian", 14),
            responseEvent("@uy:example.com", "doesntexist", 15),
            responseEvent("@uy:example.com", "poutine", 16),
        ];
        const renderResult = await newMPollBody(votes);
        expect(renderResult.container.querySelectorAll('input[type="radio"]')).toHaveLength(4);
        expect(votesCount(renderResult, "pizza")).toBe("0 votes");
        expect(votesCount(renderResult, "poutine")).toBe("1 vote");
        expect(votesCount(renderResult, "italian")).toBe("0 votes");
        expect(votesCount(renderResult, "wings")).toBe("0 votes");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Based on 1 vote");
    });

    it("renders nothing if poll has no answers", async () => {
        const answers: PollAnswer[] = [];
        const votes: MatrixEvent[] = [];
        const ends: MatrixEvent[] = [];
        const { container } = await newMPollBody(votes, ends, answers);
        expect(container.childElementCount).toEqual(0);
    });

    it("renders the first 20 answers if 21 were given", async () => {
        const answers = Array.from(Array(21).keys()).map((i) => {
            return { id: `id${i}`, [M_TEXT.name]: `Name ${i}` };
        });
        const votes: MatrixEvent[] = [];
        const ends: MatrixEvent[] = [];
        const { container } = await newMPollBody(votes, ends, answers);
        expect(container.querySelectorAll(".mx_PollOption").length).toBe(20);
    });

    it("hides scores if I voted but the poll is undisclosed", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@alice:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const renderResult = await newMPollBody(votes, [], undefined, false);
        expect(votesCount(renderResult, "pizza")).toBe("");
        expect(votesCount(renderResult, "poutine")).toBe("");
        expect(votesCount(renderResult, "italian")).toBe("");
        expect(votesCount(renderResult, "wings")).toBe("");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Results will be visible when the poll is ended");
    });

    it("highlights my vote if the poll is undisclosed", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@alice:example.com", "poutine"),
            responseEvent("@bellc:example.com", "poutine"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const { container } = await newMPollBody(votes, [], undefined, false);

        // My vote is marked
        expect(container.querySelector('input[value="pizza"]')!).toBeChecked();

        // Sanity: other items are not checked
        expect(container.querySelector('input[value="poutine"]')!).not.toBeChecked();
    });

    it("shows scores if the poll is undisclosed but ended", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza"),
            responseEvent("@alice:example.com", "pizza"),
            responseEvent("@bellc:example.com", "pizza"),
            responseEvent("@catrd:example.com", "poutine"),
            responseEvent("@dune2:example.com", "wings"),
        ];
        const ends = [newPollEndEvent("@me:example.com", 12)];
        const renderResult = await newMPollBody(votes, ends, undefined, false);
        expect(endedVotesCount(renderResult, "pizza")).toBe('<div class="mx_PollOption_winnerIcon"></div>3 votes');
        expect(endedVotesCount(renderResult, "poutine")).toBe("1 vote");
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe("1 vote");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 5 votes");
    });

    it("sends a vote event when I choose an option", async () => {
        const votes: MatrixEvent[] = [];
        const renderResult = await newMPollBody(votes);
        clickOption(renderResult, "wings");
        expect(mockClient.sendEvent).toHaveBeenCalledWith(...expectedResponseEventCall("wings"));
    });

    it("sends only one vote event when I click several times", async () => {
        const votes: MatrixEvent[] = [];
        const renderResult = await newMPollBody(votes);
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        expect(mockClient.sendEvent).toHaveBeenCalledWith(...expectedResponseEventCall("wings"));
    });

    it("sends no vote event when I click what I already chose", async () => {
        const votes = [responseEvent("@me:example.com", "wings")];
        const renderResult = await newMPollBody(votes);
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        clickOption(renderResult, "wings");
        expect(mockClient.sendEvent).not.toHaveBeenCalled();
    });

    it("sends several events when I click different options", async () => {
        const votes: MatrixEvent[] = [];
        const renderResult = await newMPollBody(votes);
        clickOption(renderResult, "wings");
        clickOption(renderResult, "italian");
        clickOption(renderResult, "poutine");
        expect(mockClient.sendEvent).toHaveBeenCalledTimes(3);
        expect(mockClient.sendEvent).toHaveBeenCalledWith(...expectedResponseEventCall("wings"));
        expect(mockClient.sendEvent).toHaveBeenCalledWith(...expectedResponseEventCall("italian"));
        expect(mockClient.sendEvent).toHaveBeenCalledWith(...expectedResponseEventCall("poutine"));
    });

    it("sends no events when I click in an ended poll", async () => {
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const votes = [responseEvent("@uy:example.com", "wings", 15), responseEvent("@uy:example.com", "poutine", 15)];
        const renderResult = await newMPollBody(votes, ends);
        clickOption(renderResult, "wings");
        clickOption(renderResult, "italian");
        clickOption(renderResult, "poutine");
        expect(mockClient.sendEvent).not.toHaveBeenCalled();
    });

    it("finds the top answer among several votes", async () => {
        // 2 votes for poutine, 1 for pizza.  "me" made an invalid vote.
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", ["pizza", "doesntexist"], 13),
            responseEvent("@uy:example.com", "italian", 14),
            responseEvent("@uy:example.com", "doesntexist", 15),
            responseEvent("@uy:example.com", "poutine", 16),
            responseEvent("@ab:example.com", "pizza", 17),
            responseEvent("@fa:example.com", "poutine", 18),
        ];

        expect(runFindTopAnswer(votes)).toEqual("Poutine");
    });

    it("finds all top answers when there is a draw", async () => {
        const votes = [
            responseEvent("@uy:example.com", "italian", 14),
            responseEvent("@ab:example.com", "pizza", 17),
            responseEvent("@fa:example.com", "poutine", 18),
        ];
        expect(runFindTopAnswer(votes)).toEqual("Italian, Pizza and Poutine");
    });

    it("is silent about the top answer if there are no votes", async () => {
        expect(runFindTopAnswer([])).toEqual("");
    });

    it("shows non-radio buttons if the poll is ended", async () => {
        const events = [newPollEndEvent()];
        const { container } = await newMPollBody([], events);
        expect(container.querySelector(".mx_StyledRadioButton")).not.toBeInTheDocument();
        expect(container.querySelector('input[type="radio"]')).not.toBeInTheDocument();
    });

    it("counts votes as normal if the poll is ended", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza", 12),
            responseEvent("@me:example.com", "wings", 20), // latest me
            responseEvent("@qbert:example.com", "pizza", 14),
            responseEvent("@qbert:example.com", "poutine", 16), // latest qbert
            responseEvent("@qbert:example.com", "wings", 15),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);
        expect(endedVotesCount(renderResult, "pizza")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe('<div class="mx_PollOption_winnerIcon"></div>1 vote');
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe('<div class="mx_PollOption_winnerIcon"></div>1 vote');
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 2 votes");
    });

    it("counts a single vote as normal if the poll is ended", async () => {
        const votes = [responseEvent("@qbert:example.com", "poutine", 16)];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);
        expect(endedVotesCount(renderResult, "pizza")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe('<div class="mx_PollOption_winnerIcon"></div>1 vote');
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe("0 votes");
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 1 vote");
    });

    it("shows ended vote counts of different numbers", async () => {
        const votes = [
            responseEvent("@me:example.com", "wings", 20),
            responseEvent("@qb:example.com", "wings", 14),
            responseEvent("@xy:example.com", "wings", 15),
            responseEvent("@fg:example.com", "pizza", 15),
            responseEvent("@hi:example.com", "pizza", 15),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);

        expect(renderResult.container.querySelectorAll(".mx_StyledRadioButton")).toHaveLength(0);
        expect(renderResult.container.querySelectorAll('input[type="radio"]')).toHaveLength(0);
        expect(endedVotesCount(renderResult, "pizza")).toBe("2 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe('<div class="mx_PollOption_winnerIcon"></div>3 votes');
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 5 votes");
    });

    it("ignores votes that arrived after poll ended", async () => {
        const votes = [
            responseEvent("@sd:example.com", "wings", 30), // Late
            responseEvent("@ff:example.com", "wings", 20),
            responseEvent("@ut:example.com", "wings", 14),
            responseEvent("@iu:example.com", "wings", 15),
            responseEvent("@jf:example.com", "wings", 35), // Late
            responseEvent("@wf:example.com", "pizza", 15),
            responseEvent("@ld:example.com", "pizza", 15),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);

        expect(endedVotesCount(renderResult, "pizza")).toBe("2 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe('<div class="mx_PollOption_winnerIcon"></div>3 votes');
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 5 votes");
    });

    it("counts votes that arrived after an unauthorised poll end event", async () => {
        const votes = [
            responseEvent("@sd:example.com", "wings", 30), // Late
            responseEvent("@ff:example.com", "wings", 20),
            responseEvent("@ut:example.com", "wings", 14),
            responseEvent("@iu:example.com", "wings", 15),
            responseEvent("@jf:example.com", "wings", 35), // Late
            responseEvent("@wf:example.com", "pizza", 15),
            responseEvent("@ld:example.com", "pizza", 15),
        ];
        const ends = [
            newPollEndEvent("@unauthorised:example.com", 5), // Should be ignored
            newPollEndEvent("@me:example.com", 25),
        ];
        const renderResult = await newMPollBody(votes, ends);

        expect(endedVotesCount(renderResult, "pizza")).toBe("2 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe('<div class="mx_PollOption_winnerIcon"></div>3 votes');
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 5 votes");
    });

    it("ignores votes that arrived after the first end poll event", async () => {
        // From MSC3381:
        // "Votes sent on or before the end event's timestamp are valid votes"

        const votes = [
            responseEvent("@sd:example.com", "wings", 30), // Late
            responseEvent("@ff:example.com", "wings", 20),
            responseEvent("@ut:example.com", "wings", 14),
            responseEvent("@iu:example.com", "wings", 25), // Just on time
            responseEvent("@jf:example.com", "wings", 35), // Late
            responseEvent("@wf:example.com", "pizza", 15),
            responseEvent("@ld:example.com", "pizza", 15),
        ];
        const ends = [
            newPollEndEvent("@me:example.com", 65),
            newPollEndEvent("@me:example.com", 25),
            newPollEndEvent("@me:example.com", 75),
        ];
        const renderResult = await newMPollBody(votes, ends);

        expect(endedVotesCount(renderResult, "pizza")).toBe("2 votes");
        expect(endedVotesCount(renderResult, "poutine")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "italian")).toBe("0 votes");
        expect(endedVotesCount(renderResult, "wings")).toBe('<div class="mx_PollOption_winnerIcon"></div>3 votes');
        expect(renderResult.getByTestId("totalVotes").innerHTML).toBe("Final result based on 5 votes");
    });

    it("highlights the winning vote in an ended poll", async () => {
        // Given I voted for pizza but the winner is wings
        const votes = [
            responseEvent("@me:example.com", "pizza", 20),
            responseEvent("@qb:example.com", "wings", 14),
            responseEvent("@xy:example.com", "wings", 15),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);

        // Then the winner is highlighted
        expect(endedVoteChecked(renderResult, "wings")).toBe(true);
        expect(endedVoteChecked(renderResult, "pizza")).toBe(false);

        // Double-check by looking for the endedOptionWinner class
        expect(endedVoteDiv(renderResult, "wings").className.includes("mx_PollOption_endedOptionWinner")).toBe(true);
        expect(endedVoteDiv(renderResult, "pizza").className.includes("mx_PollOption_endedOptionWinner")).toBe(false);
    });

    it("highlights multiple winning votes", async () => {
        const votes = [
            responseEvent("@me:example.com", "pizza", 20),
            responseEvent("@xy:example.com", "wings", 15),
            responseEvent("@fg:example.com", "poutine", 15),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody(votes, ends);

        expect(endedVoteChecked(renderResult, "pizza")).toBe(true);
        expect(endedVoteChecked(renderResult, "wings")).toBe(true);
        expect(endedVoteChecked(renderResult, "poutine")).toBe(true);
        expect(endedVoteChecked(renderResult, "italian")).toBe(false);
        expect(renderResult.container.getElementsByClassName(CHECKED)).toHaveLength(3);
    });

    it("highlights nothing if poll has no votes", async () => {
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const renderResult = await newMPollBody([], ends);
        expect(renderResult.container.getElementsByClassName(CHECKED)).toHaveLength(0);
    });

    it("says poll is not ended if there is no end event", async () => {
        const ends: MatrixEvent[] = [];
        const result = await runIsPollEnded(ends);
        expect(result).toBe(false);
    });

    it("says poll is ended if there is an end event", async () => {
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const result = await runIsPollEnded(ends);
        expect(result).toBe(true);
    });

    it("says poll is not ended if poll is fetching responses", async () => {
        const pollEvent = new MatrixEvent({
            type: M_POLL_START.name,
            event_id: "$mypoll",
            room_id: "#myroom:example.com",
            content: newPollStart([]),
        });
        const ends = [newPollEndEvent("@me:example.com", 25)];

        await setupRoomWithPollEvents([pollEvent], [], ends, mockClient);
        const poll = mockClient.getRoom(pollEvent.getRoomId()!)!.polls.get(pollEvent.getId()!)!;
        // start fetching, dont await
        poll.getResponses();
        expect(isPollEnded(pollEvent, mockClient)).toBe(false);
    });

    it("Displays edited content and new answer IDs if the poll has been edited", async () => {
        const pollEvent = new MatrixEvent({
            type: M_POLL_START.name,
            event_id: "$mypoll",
            room_id: "#myroom:example.com",
            content: newPollStart(
                [
                    { id: "o1", [M_TEXT.name]: "old answer 1" },
                    { id: "o2", [M_TEXT.name]: "old answer 2" },
                ],
                "old question",
            ),
        });
        const replacingEvent = new MatrixEvent({
            type: M_POLL_START.name,
            event_id: "$mypollreplacement",
            room_id: "#myroom:example.com",
            content: {
                "m.new_content": newPollStart(
                    [
                        { id: "n1", [M_TEXT.name]: "new answer 1" },
                        { id: "n2", [M_TEXT.name]: "new answer 2" },
                        { id: "n3", [M_TEXT.name]: "new answer 3" },
                    ],
                    "new question",
                ),
            },
        });
        pollEvent.makeReplaced(replacingEvent);
        const { getByTestId, container } = await newMPollBodyFromEvent(pollEvent, []);
        expect(getByTestId("pollQuestion").innerHTML).toEqual(
            'new question<span class="mx_MPollBody_edited"> (edited)</span>',
        );
        const inputs = container.querySelectorAll('input[type="radio"]');
        expect(inputs).toHaveLength(3);
        expect(inputs[0].getAttribute("value")).toEqual("n1");
        expect(inputs[1].getAttribute("value")).toEqual("n2");
        expect(inputs[2].getAttribute("value")).toEqual("n3");
        const options = container.querySelectorAll(".mx_PollOption_optionText");
        expect(options).toHaveLength(3);
        expect(options[0].innerHTML).toEqual("new answer 1");
        expect(options[1].innerHTML).toEqual("new answer 2");
        expect(options[2].innerHTML).toEqual("new answer 3");
    });

    it("renders a poll with no votes", async () => {
        const votes: MatrixEvent[] = [];
        const { container } = await newMPollBody(votes);
        expect(container).toMatchSnapshot();
    });

    it("renders a poll with only non-local votes", async () => {
        const votes = [
            responseEvent("@op:example.com", "pizza", 12),
            responseEvent("@op:example.com", [], 13),
            responseEvent("@op:example.com", "italian", 14),
            responseEvent("@me:example.com", "wings", 15),
            responseEvent("@qr:example.com", "italian", 16),
        ];
        const { container } = await newMPollBody(votes);
        expect(container).toMatchSnapshot();
    });

    it("renders a warning message when poll has undecryptable relations", async () => {
        const votes = [
            responseEvent("@op:example.com", "pizza", 12),
            responseEvent("@op:example.com", [], 13),
            responseEvent("@op:example.com", "italian", 14),
            responseEvent("@me:example.com", "wings", 15),
            responseEvent("@qr:example.com", "italian", 16),
        ];

        jest.spyOn(votes[1], "isDecryptionFailure").mockReturnValue(true);
        const { getByText } = await newMPollBody(votes);
        expect(getByText("Due to decryption errors, some votes may not be counted")).toBeInTheDocument();
    });

    it("renders a poll with local, non-local and invalid votes", async () => {
        const votes = [
            responseEvent("@a:example.com", "pizza", 12),
            responseEvent("@b:example.com", [], 13),
            responseEvent("@c:example.com", "italian", 14),
            responseEvent("@d:example.com", "italian", 14),
            responseEvent("@e:example.com", "wings", 15),
            responseEvent("@me:example.com", "italian", 16),
        ];
        const renderResult = await newMPollBody(votes);
        clickOption(renderResult, "italian");

        expect(renderResult.container).toMatchSnapshot();
    });

    it("renders a poll that I have not voted in", async () => {
        const votes = [
            responseEvent("@op:example.com", "pizza", 12),
            responseEvent("@op:example.com", [], 13),
            responseEvent("@op:example.com", "italian", 14),
            responseEvent("@yo:example.com", "wings", 15),
            responseEvent("@qr:example.com", "italian", 16),
        ];
        const { container } = await newMPollBody(votes);
        expect(container).toMatchSnapshot();
    });

    it("renders a finished poll with no votes", async () => {
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const { container } = await newMPollBody([], ends);
        expect(container).toMatchSnapshot();
    });

    it("renders a finished poll", async () => {
        const votes = [
            responseEvent("@op:example.com", "pizza", 12),
            responseEvent("@op:example.com", [], 13),
            responseEvent("@op:example.com", "italian", 14),
            responseEvent("@yo:example.com", "wings", 15),
            responseEvent("@qr:example.com", "italian", 16),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const { container } = await newMPollBody(votes, ends);
        expect(container).toMatchSnapshot();
    });

    it("renders a finished poll with multiple winners", async () => {
        const votes = [
            responseEvent("@ed:example.com", "pizza", 12),
            responseEvent("@rf:example.com", "pizza", 12),
            responseEvent("@th:example.com", "wings", 13),
            responseEvent("@yh:example.com", "wings", 14),
            responseEvent("@th:example.com", "poutine", 13),
            responseEvent("@yh:example.com", "poutine", 14),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const { container } = await newMPollBody(votes, ends);
        expect(container).toMatchSnapshot();
    });

    it("renders an undisclosed, unfinished poll", async () => {
        const votes = [
            responseEvent("@ed:example.com", "pizza", 12),
            responseEvent("@rf:example.com", "pizza", 12),
            responseEvent("@th:example.com", "wings", 13),
            responseEvent("@yh:example.com", "wings", 14),
            responseEvent("@th:example.com", "poutine", 13),
            responseEvent("@yh:example.com", "poutine", 14),
        ];
        const ends: MatrixEvent[] = [];
        const { container } = await newMPollBody(votes, ends, undefined, false);
        expect(container).toMatchSnapshot();
    });

    it("renders an undisclosed, finished poll", async () => {
        const votes = [
            responseEvent("@ed:example.com", "pizza", 12),
            responseEvent("@rf:example.com", "pizza", 12),
            responseEvent("@th:example.com", "wings", 13),
            responseEvent("@yh:example.com", "wings", 14),
            responseEvent("@th:example.com", "poutine", 13),
            responseEvent("@yh:example.com", "poutine", 14),
        ];
        const ends = [newPollEndEvent("@me:example.com", 25)];
        const { container } = await newMPollBody(votes, ends, undefined, false);
        expect(container).toMatchSnapshot();
    });
});

function newVoteRelations(relationEvents: Array<MatrixEvent>): Relations {
    return newRelations(relationEvents, M_POLL_RESPONSE.name, [M_POLL_RESPONSE.altName!]);
}

function newRelations(relationEvents: Array<MatrixEvent>, eventType: string, altEventTypes?: string[]): Relations {
    const voteRelations = new Relations("m.reference", eventType, mockClient, altEventTypes);
    for (const ev of relationEvents) {
        voteRelations.addEvent(ev);
    }
    return voteRelations;
}

async function newMPollBody(
    relationEvents: Array<MatrixEvent>,
    endEvents: Array<MatrixEvent> = [],
    answers?: PollAnswer[],
    disclosed = true,
    waitForResponsesLoad = true,
): Promise<RenderResult> {
    const mxEvent = new MatrixEvent({
        type: M_POLL_START.name,
        event_id: "$mypoll",
        room_id: "#myroom:example.com",
        content: newPollStart(answers, undefined, disclosed),
    });
    const result = newMPollBodyFromEvent(mxEvent, relationEvents, endEvents);
    // flush promises from loading relations
    if (waitForResponsesLoad) {
        await flushPromises();
    }
    return result;
}

function getMPollBodyPropsFromEvent(mxEvent: MatrixEvent): IBodyProps {
    return {
        mxEvent,
        // We don't use any of these props, but they're required.
        highlightLink: "unused",
        highlights: [],
        mediaEventHelper: {} as unknown as MediaEventHelper,
        onHeightChanged: () => {},
        onMessageAllowed: () => {},
        permalinkCreator: {} as unknown as RoomPermalinkCreator,
    };
}

function renderMPollBodyWithWrapper(props: IBodyProps): RenderResult {
    return render(<MPollBody {...props} />, {
        wrapper: ({ children }) => (
            <MatrixClientContext.Provider value={mockClient}>{children}</MatrixClientContext.Provider>
        ),
    });
}

async function newMPollBodyFromEvent(
    mxEvent: MatrixEvent,
    relationEvents: Array<MatrixEvent>,
    endEvents: Array<MatrixEvent> = [],
): Promise<RenderResult> {
    const props = getMPollBodyPropsFromEvent(mxEvent);

    await setupRoomWithPollEvents([mxEvent], relationEvents, endEvents, mockClient);

    return renderMPollBodyWithWrapper(props);
}

function clickOption({ getByTestId }: RenderResult, value: string) {
    fireEvent.click(getByTestId(`pollOption-${value}`));
}

function voteButton({ getByTestId }: RenderResult, value: string): Element {
    return getByTestId(`pollOption-${value}`);
}

function votesCount({ getByTestId }: RenderResult, value: string): string {
    return getByTestId(`pollOption-${value}`).querySelector(".mx_PollOption_optionVoteCount")!.innerHTML;
}

function endedVoteChecked({ getByTestId }: RenderResult, value: string): boolean {
    return getByTestId(`pollOption-${value}`).className.includes(CHECKED);
}

function endedVoteDiv({ getByTestId }: RenderResult, value: string): Element {
    return getByTestId(`pollOption-${value}`).firstElementChild!;
}

function endedVotesCount(renderResult: RenderResult, value: string): string {
    return votesCount(renderResult, value);
}

function newPollStart(answers?: PollAnswer[], question?: string, disclosed = true): PollStartEventContent {
    if (!answers) {
        answers = [
            { id: "pizza", [M_TEXT.name]: "Pizza" },
            { id: "poutine", [M_TEXT.name]: "Poutine" },
            { id: "italian", [M_TEXT.name]: "Italian" },
            { id: "wings", [M_TEXT.name]: "Wings" },
        ];
    }

    if (!question) {
        question = "What should we order for the party?";
    }

    const answersFallback = answers.map((a, i) => `${i + 1}. ${M_TEXT.findIn<string>(a)}`).join("\n");

    const fallback = `${question}\n${answersFallback}`;

    return {
        [M_POLL_START.name]: {
            question: {
                [M_TEXT.name]: question,
            },
            kind: disclosed ? M_POLL_KIND_DISCLOSED.name : M_POLL_KIND_UNDISCLOSED.name,
            answers: answers,
        },
        [M_TEXT.name]: fallback,
    };
}

function responseEvent(
    sender = "@alice:example.com",
    answers: string | Array<string> = "italian",
    ts = 0,
): MatrixEvent {
    const ans = typeof answers === "string" ? [answers] : answers;
    return new MatrixEvent({
        event_id: nextId(),
        room_id: "#myroom:example.com",
        origin_server_ts: ts,
        type: M_POLL_RESPONSE.name,
        sender: sender,
        content: {
            "m.relates_to": {
                rel_type: "m.reference",
                event_id: "$mypoll",
            },
            [M_POLL_RESPONSE.name]: {
                answers: ans,
            },
        },
    });
}

function expectedResponseEvent(answer: string) {
    return {
        content: {
            [M_POLL_RESPONSE.name]: {
                answers: [answer],
            },
            "m.relates_to": {
                event_id: "$mypoll",
                rel_type: "m.reference",
            },
        },
        roomId: "#myroom:example.com",
        eventType: M_POLL_RESPONSE.name,
        txnId: "$123",
    };
}
function expectedResponseEventCall(answer: string) {
    const { content, roomId, eventType } = expectedResponseEvent(answer);
    return [roomId, eventType, content];
}

function newPollEndEvent(sender = "@me:example.com", ts = 0): MatrixEvent {
    return makePollEndEvent("$mypoll", "#myroom:example.com", sender, ts);
}

async function runIsPollEnded(ends: MatrixEvent[]) {
    const pollEvent = new MatrixEvent({
        event_id: "$mypoll",
        room_id: "#myroom:example.com",
        type: M_POLL_START.name,
        content: newPollStart(),
    });

    await setupRoomWithPollEvents([pollEvent], [], ends, mockClient);

    return isPollEnded(pollEvent, mockClient);
}

function runFindTopAnswer(votes: MatrixEvent[]) {
    const pollEvent = new MatrixEvent({
        event_id: "$mypoll",
        room_id: "#myroom:example.com",
        type: M_POLL_START.name,
        content: newPollStart(),
    });

    return findTopAnswer(pollEvent, newVoteRelations(votes));
}

let EVENT_ID = 0;
function nextId(): string {
    EVENT_ID++;
    return EVENT_ID.toString();
}