/*
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 { mocked } from "jest-mock";
import { JoinRule, Room } from "matrix-js-sdk/src/matrix";
import { KnownMembership } from "matrix-js-sdk/src/types";

import { shouldShowComponent } from "../../../src/customisations/helpers/UIComponents";
import { UIComponent } from "../../../src/settings/UIFeature";
import { canInviteTo } from "../../../src/utils/room/canInviteTo";
import { getMockClientWithEventEmitter, mockClientMethodsUser } from "../../test-utils";

jest.mock("../../../src/customisations/helpers/UIComponents", () => ({
    shouldShowComponent: jest.fn(),
}));

describe("canInviteTo()", () => {
    afterEach(() => {
        jest.restoreAllMocks();
    });

    const userId = "@alice:server.org";
    const roomId = "!room:server.org";

    const makeRoom = (): Room => {
        const client = getMockClientWithEventEmitter({
            ...mockClientMethodsUser(userId),
        });
        const room = new Room(roomId, client, userId);
        jest.spyOn(room, "getMyMembership").mockReturnValue(KnownMembership.Join);
        jest.spyOn(room, "getJoinRule").mockReturnValue(JoinRule.Public);
        jest.spyOn(room, "canInvite").mockReturnValue(true);
        return room;
    };

    beforeEach(() => {
        mocked(shouldShowComponent).mockReturnValue(true);
    });

    describe("when user has permissions to issue an invite for this room", () => {
        // aka when Room.canInvite is true

        it("should return false when current user membership is not joined", () => {
            const room = makeRoom();
            jest.spyOn(room, "getMyMembership").mockReturnValue(KnownMembership.Invite);

            expect(canInviteTo(room)).toEqual(false);
        });

        it("should return false when UIComponent.InviteUsers customisation hides invite", () => {
            const room = makeRoom();
            mocked(shouldShowComponent).mockReturnValue(false);

            expect(canInviteTo(room)).toEqual(false);
            expect(shouldShowComponent).toHaveBeenCalledWith(UIComponent.InviteUsers);
        });

        it("should return true when user can invite and is a room member", () => {
            const room = makeRoom();

            expect(canInviteTo(room)).toEqual(true);
        });
    });

    describe("when user does not have permissions to issue an invite for this room", () => {
        // aka when Room.canInvite is false

        it("should return false when room is a private space", () => {
            const room = makeRoom();
            jest.spyOn(room, "getJoinRule").mockReturnValue(JoinRule.Invite);
            jest.spyOn(room, "isSpaceRoom").mockReturnValue(true);
            jest.spyOn(room, "canInvite").mockReturnValue(false);

            expect(canInviteTo(room)).toEqual(false);
        });

        it("should return false when room is just a room", () => {
            const room = makeRoom();
            jest.spyOn(room, "canInvite").mockReturnValue(false);

            expect(canInviteTo(room)).toEqual(false);
        });

        it("should return true when room is a public space", () => {
            const room = makeRoom();
            // default join rule is public
            jest.spyOn(room, "isSpaceRoom").mockReturnValue(true);
            jest.spyOn(room, "canInvite").mockReturnValue(false);

            expect(canInviteTo(room)).toEqual(true);
        });
    });
});