/*
Copyright 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 { mocked } from "jest-mock";
import { IProtocol, IPublicRoomsChunkRoom, MatrixClient, Room, RoomMember } from "matrix-js-sdk/src/matrix";
import sanitizeHtml from "sanitize-html";
import { fireEvent, render, screen } from "@testing-library/react";

import SpotlightDialog, { Filter } from "../../../../src/components/views/dialogs/spotlight/SpotlightDialog";
import { MatrixClientPeg } from "../../../../src/MatrixClientPeg";
import { LocalRoom, LOCAL_ROOM_ID_PREFIX } from "../../../../src/models/LocalRoom";
import { DirectoryMember, startDmOnFirstMessage } from "../../../../src/utils/direct-messages";
import DMRoomMap from "../../../../src/utils/DMRoomMap";
import { flushPromisesWithFakeTimers, mkRoom, stubClient } from "../../../test-utils";
import { shouldShowFeedback } from "../../../../src/utils/Feedback";
import SettingsStore from "../../../../src/settings/SettingsStore";
import { SettingLevel } from "../../../../src/settings/SettingLevel";

jest.useFakeTimers();

jest.mock("../../../../src/utils/Feedback");

jest.mock("../../../../src/utils/direct-messages", () => ({
    // @ts-ignore
    ...jest.requireActual("../../../../src/utils/direct-messages"),
    startDmOnFirstMessage: jest.fn(),
}));

interface IUserChunkMember {
    user_id: string;
    display_name?: string;
    avatar_url?: string;
}

interface MockClientOptions {
    userId?: string;
    homeserver?: string;
    thirdPartyProtocols?: Record<string, IProtocol>;
    rooms?: IPublicRoomsChunkRoom[];
    members?: RoomMember[];
    users?: IUserChunkMember[];
}

function mockClient({
    userId = "testuser",
    homeserver = "example.tld",
    thirdPartyProtocols = {},
    rooms = [],
    members = [],
    users = [],
}: MockClientOptions = {}): MatrixClient {
    stubClient();
    const cli = MatrixClientPeg.get();
    MatrixClientPeg.getHomeserverName = jest.fn(() => homeserver);
    cli.getUserId = jest.fn(() => userId);
    cli.getHomeserverUrl = jest.fn(() => homeserver);
    cli.getThirdpartyProtocols = jest.fn(() => Promise.resolve(thirdPartyProtocols));
    cli.publicRooms = jest.fn((options) => {
        const searchTerm = options?.filter?.generic_search_term?.toLowerCase();
        const chunk = rooms.filter(
            (it) =>
                !searchTerm ||
                it.room_id.toLowerCase().includes(searchTerm) ||
                it.name?.toLowerCase().includes(searchTerm) ||
                sanitizeHtml(it?.topic || "", { allowedTags: [] })
                    .toLowerCase()
                    .includes(searchTerm) ||
                it.canonical_alias?.toLowerCase().includes(searchTerm) ||
                it.aliases?.find((alias) => alias.toLowerCase().includes(searchTerm)),
        );
        return Promise.resolve({
            chunk,
            total_room_count_estimate: chunk.length,
        });
    });
    cli.searchUserDirectory = jest.fn(({ term, limit }) => {
        const searchTerm = term?.toLowerCase();
        const results = users.filter(
            (it) =>
                !searchTerm ||
                it.user_id.toLowerCase().includes(searchTerm) ||
                it.display_name?.toLowerCase().includes(searchTerm),
        );
        return Promise.resolve({
            results: results.slice(0, limit ?? +Infinity),
            limited: !!limit && limit < results.length,
        });
    });
    cli.getProfileInfo = jest.fn(async (userId) => {
        const member = members.find((it) => it.userId === userId);
        if (member) {
            return Promise.resolve({
                displayname: member.rawDisplayName,
                avatar_url: member.getMxcAvatarUrl(),
            });
        } else {
            return Promise.reject();
        }
    });
    return cli;
}

describe("Spotlight Dialog", () => {
    const testPerson: IUserChunkMember = {
        user_id: "@janedoe:matrix.org",
        display_name: "Jane Doe",
        avatar_url: undefined,
    };

    const testPublicRoom: IPublicRoomsChunkRoom = {
        room_id: "@room247:matrix.org",
        name: "Room #247",
        topic: "We hope you'll have a <b>shining</b> experience!",
        world_readable: false,
        num_joined_members: 1,
        guest_can_join: false,
    };

    let testRoom: Room;
    let testLocalRoom: LocalRoom;

    let mockedClient: MatrixClient;

    beforeEach(() => {
        mockedClient = mockClient({ rooms: [testPublicRoom], users: [testPerson] });
        testRoom = mkRoom(mockedClient, "!test23:example.com");
        mocked(testRoom.getMyMembership).mockReturnValue("join");
        testLocalRoom = new LocalRoom(LOCAL_ROOM_ID_PREFIX + "test23", mockedClient, mockedClient.getUserId()!);
        testLocalRoom.updateMyMembership("join");
        mocked(mockedClient.getVisibleRooms).mockReturnValue([testRoom, testLocalRoom]);

        jest.spyOn(DMRoomMap, "shared").mockReturnValue({
            getUserIdForRoomId: jest.fn(),
        } as unknown as DMRoomMap);
    });

    describe("should apply filters supplied via props", () => {
        it("without filter", async () => {
            render(<SpotlightDialog onFinished={() => null} />);

            const filterChip = document.querySelector("div.mx_SpotlightDialog_filter");
            expect(filterChip).not.toBeInTheDocument();
        });

        it("with public room filter", async () => {
            render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);

            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            const filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).toBeInTheDocument();
            expect(filterChip.innerHTML).toContain("Public rooms");

            const content = document.querySelector("#mx_SpotlightDialog_content")!;
            const options = content.querySelectorAll("div.mx_SpotlightDialog_option");
            expect(options.length).toBe(1);
            expect(options[0].innerHTML).toContain(testPublicRoom.name);
        });

        it("with people filter", async () => {
            render(
                <SpotlightDialog
                    initialFilter={Filter.People}
                    initialText={testPerson.display_name}
                    onFinished={() => null}
                />,
            );
            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            const filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).toBeInTheDocument();
            expect(filterChip.innerHTML).toContain("People");

            const content = document.querySelector("#mx_SpotlightDialog_content")!;
            const options = content.querySelectorAll("div.mx_SpotlightDialog_option");
            expect(options.length).toBeGreaterThanOrEqual(1);
            expect(options[0]!.innerHTML).toContain(testPerson.display_name);
        });
    });

    describe("when MSC3946 dynamic room predecessors is enabled", () => {
        beforeEach(() => {
            jest.spyOn(SettingsStore, "getValue").mockImplementation((settingName, roomId, excludeDefault) => {
                if (settingName === "feature_dynamic_room_predecessors") {
                    return true;
                } else {
                    return []; // SpotlightSearch.recentSearches
                }
            });
        });

        afterEach(() => {
            jest.restoreAllMocks();
        });

        it("should call getVisibleRooms with MSC3946 dynamic room predecessors", async () => {
            render(<SpotlightDialog onFinished={() => null} />);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();
            expect(mockedClient.getVisibleRooms).toHaveBeenCalledWith(true);
        });
    });

    describe("should apply manually selected filter", () => {
        it("with public rooms", async () => {
            render(<SpotlightDialog onFinished={() => null} />);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            fireEvent.click(screen.getByText("Public rooms"));
            // wrapper.find("#mx_SpotlightDialog_button_explorePublicRooms").first().simulate("click");
            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            const filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).toBeInTheDocument();
            expect(filterChip.innerHTML).toContain("Public rooms");

            const content = document.querySelector("#mx_SpotlightDialog_content")!;
            const options = content.querySelectorAll("div.mx_SpotlightDialog_option");
            expect(options.length).toBe(1);
            expect(options[0]!.innerHTML).toContain(testPublicRoom.name);

            // assert that getVisibleRooms is called without MSC3946 dynamic room predecessors
            expect(mockedClient.getVisibleRooms).toHaveBeenCalledWith(false);
        });
        it("with people", async () => {
            render(<SpotlightDialog initialText={testPerson.display_name} onFinished={() => null} />);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            fireEvent.click(screen.getByText("People"));

            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            const filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).toBeInTheDocument();
            expect(filterChip.innerHTML).toContain("People");

            const content = document.querySelector("#mx_SpotlightDialog_content")!;
            const options = content.querySelectorAll("div.mx_SpotlightDialog_option");
            expect(options.length).toBeGreaterThanOrEqual(1);
            expect(options[0]!.innerHTML).toContain(testPerson.display_name);
        });
    });

    describe("should allow clearing filter manually", () => {
        it("with public room filter", async () => {
            render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);
            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            let filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).toBeInTheDocument();
            expect(filterChip.innerHTML).toContain("Public rooms");

            fireEvent.click(filterChip.querySelector("div.mx_SpotlightDialog_filter--close")!);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            filterChip = document.querySelector("div.mx_SpotlightDialog_filter")!;
            expect(filterChip).not.toBeInTheDocument();
        });
        it("with people filter", async () => {
            render(
                <SpotlightDialog
                    initialFilter={Filter.People}
                    initialText={testPerson.display_name}
                    onFinished={() => null}
                />,
            );
            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            let filterChip = document.querySelector("div.mx_SpotlightDialog_filter");
            expect(filterChip).toBeInTheDocument();
            expect(filterChip!.innerHTML).toContain("People");

            fireEvent.click(filterChip!.querySelector("div.mx_SpotlightDialog_filter--close")!);
            jest.advanceTimersByTime(1);
            await flushPromisesWithFakeTimers();

            filterChip = document.querySelector("div.mx_SpotlightDialog_filter");
            expect(filterChip).not.toBeInTheDocument();
        });
    });

    describe("searching for rooms", () => {
        let options: NodeListOf<Element>;

        beforeAll(async () => {
            render(<SpotlightDialog initialText="test23" onFinished={() => null} />);
            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            const content = document.querySelector("#mx_SpotlightDialog_content")!;
            options = content.querySelectorAll("div.mx_SpotlightDialog_option");
        });

        it("should find Rooms", () => {
            expect(options.length).toBe(3);
            expect(options[0]!.innerHTML).toContain(testRoom.name);
        });

        it("should not find LocalRooms", () => {
            expect(options.length).toBe(3);
            expect(options[0]!.innerHTML).not.toContain(testLocalRoom.name);
        });
    });

    it("should start a DM when clicking a person", async () => {
        render(
            <SpotlightDialog
                initialFilter={Filter.People}
                initialText={testPerson.display_name}
                onFinished={() => null}
            />,
        );

        jest.advanceTimersByTime(200);
        await flushPromisesWithFakeTimers();

        const options = document.querySelectorAll("div.mx_SpotlightDialog_option");
        expect(options.length).toBeGreaterThanOrEqual(1);
        expect(options[0]!.innerHTML).toContain(testPerson.display_name);

        fireEvent.click(options[0]!);
        expect(startDmOnFirstMessage).toHaveBeenCalledWith(mockedClient, [new DirectoryMember(testPerson)]);
    });

    describe("Feedback prompt", () => {
        it("should show feedback prompt if feedback is enabled", async () => {
            mocked(shouldShowFeedback).mockReturnValue(true);

            render(<SpotlightDialog initialText="test23" onFinished={() => null} />);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            expect(screen.getByText("give feedback")).toBeInTheDocument();
        });

        it("should hide feedback prompt if feedback is disabled", async () => {
            mocked(shouldShowFeedback).mockReturnValue(false);

            render(<SpotlightDialog initialText="test23" onFinished={() => null} />);
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            expect(screen.queryByText("give feedback")).not.toBeInTheDocument();
        });
    });

    describe("nsfw public rooms filter", () => {
        const nsfwNameRoom: IPublicRoomsChunkRoom = {
            room_id: "@room1:matrix.org",
            name: "Room 1 [NSFW]",
            topic: undefined,
            world_readable: false,
            num_joined_members: 1,
            guest_can_join: false,
        };

        const nsfwTopicRoom: IPublicRoomsChunkRoom = {
            room_id: "@room2:matrix.org",
            name: "Room 2",
            topic: "A room with a topic that includes nsfw",
            world_readable: false,
            num_joined_members: 1,
            guest_can_join: false,
        };

        const potatoRoom: IPublicRoomsChunkRoom = {
            room_id: "@room3:matrix.org",
            name: "Potato Room 3",
            topic: "Room where we discuss potatoes",
            world_readable: false,
            num_joined_members: 1,
            guest_can_join: false,
        };

        beforeEach(() => {
            mockedClient = mockClient({ rooms: [nsfwNameRoom, nsfwTopicRoom, potatoRoom], users: [testPerson] });
            SettingsStore.setValue("SpotlightSearch.showNsfwPublicRooms", null, SettingLevel.DEVICE, false);
        });

        afterAll(() => {
            SettingsStore.setValue("SpotlightSearch.showNsfwPublicRooms", null, SettingLevel.DEVICE, false);
        });

        it("does not display rooms with nsfw keywords in results when showNsfwPublicRooms is falsy", async () => {
            render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);

            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            expect(screen.getByText(potatoRoom.name!)).toBeInTheDocument();
            expect(screen.queryByText(nsfwTopicRoom.name!)).not.toBeInTheDocument();
            expect(screen.queryByText(nsfwTopicRoom.name!)).not.toBeInTheDocument();
        });

        it("displays rooms with nsfw keywords in results when showNsfwPublicRooms is truthy", async () => {
            SettingsStore.setValue("SpotlightSearch.showNsfwPublicRooms", null, SettingLevel.DEVICE, true);
            render(<SpotlightDialog initialFilter={Filter.PublicRooms} onFinished={() => null} />);

            // search is debounced
            jest.advanceTimersByTime(200);
            await flushPromisesWithFakeTimers();

            expect(screen.getByText(nsfwTopicRoom.name!)).toBeInTheDocument();
            expect(screen.getByText(nsfwNameRoom.name!)).toBeInTheDocument();
            expect(screen.getByText(potatoRoom.name!)).toBeInTheDocument();
        });
    });
});