/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import { mocked, Mocked } from "jest-mock";
import {
    IMatrixProfile,
    MatrixClient,
    MatrixError,
    MatrixEvent,
    Room,
    RoomMemberEvent,
} from "matrix-js-sdk/src/matrix";

import { UserProfilesStore } from "../../src/stores/UserProfilesStore";
import { filterConsole, mkRoomMember, mkRoomMemberJoinEvent, stubClient } from "../test-utils";

describe("UserProfilesStore", () => {
    const userIdDoesNotExist = "@unknown:example.com";
    const userDoesNotExistError = new MatrixError({
        errcode: "M_NOT_FOUND",
        error: "Profile not found",
    });

    const user1Id = "@user1:example.com";
    const user1Profile: IMatrixProfile = { displayname: "User 1", avatar_url: undefined };
    const user2Id = "@user2:example.com";
    const user2Profile: IMatrixProfile = { displayname: "User 2", avatar_url: undefined };
    const user3Id = "@user3:example.com";
    let mockClient: Mocked<MatrixClient>;
    let userProfilesStore: UserProfilesStore;
    let room: Room;

    filterConsole(
        "Error retrieving profile for userId @unknown:example.com",
        "Error retrieving profile for userId @user3:example.com",
    );

    beforeEach(() => {
        mockClient = mocked(stubClient());
        room = new Room("!room:example.com", mockClient, mockClient.getSafeUserId());
        room.currentState.setStateEvents([
            mkRoomMemberJoinEvent(user2Id, room.roomId),
            mkRoomMemberJoinEvent(user3Id, room.roomId),
        ]);
        mockClient.getRooms.mockReturnValue([room]);
        userProfilesStore = new UserProfilesStore(mockClient);

        mockClient.getProfileInfo.mockImplementation(async (userId: string) => {
            if (userId === user1Id) return user1Profile;
            if (userId === user2Id) return user2Profile;

            throw userDoesNotExistError;
        });
    });

    it("getProfile should return undefined if the profile was not fetched", () => {
        expect(userProfilesStore.getProfile(user1Id)).toBeUndefined();
    });

    describe("fetchProfile", () => {
        it("should return the profile from the API and cache it", async () => {
            const profile = await userProfilesStore.fetchProfile(user1Id);
            expect(profile).toBe(user1Profile);
            expect(userProfilesStore.getProfile(user1Id)).toBe(user1Profile);
        });

        it("when shouldThrow = true and there is an error it should raise an error", async () => {
            await expect(userProfilesStore.fetchProfile(userIdDoesNotExist, { shouldThrow: true })).rejects.toThrow(
                userDoesNotExistError.message,
            );
        });

        describe("when fetching a profile that does not exist", () => {
            let profile: IMatrixProfile | null | undefined;

            beforeEach(async () => {
                profile = await userProfilesStore.fetchProfile(userIdDoesNotExist);
            });

            it("should return null", () => {
                expect(profile).toBeNull();
            });

            it("should cache the error and result", () => {
                expect(userProfilesStore.getProfile(userIdDoesNotExist)).toBeNull();
                expect(userProfilesStore.getProfileLookupError(userIdDoesNotExist)).toBe(userDoesNotExistError);
            });

            describe("when the profile does not exist and fetching it again", () => {
                beforeEach(async () => {
                    mockClient.getProfileInfo.mockResolvedValue(user1Profile);
                    profile = await userProfilesStore.fetchProfile(userIdDoesNotExist);
                });

                it("should return the profile", () => {
                    expect(profile).toBe(user1Profile);
                });

                it("should clear the error", () => {
                    expect(userProfilesStore.getProfileLookupError(userIdDoesNotExist)).toBeUndefined();
                });
            });
        });
    });

    describe("getOrFetchProfile", () => {
        it("should return a profile from the API and cache it", async () => {
            const profile = await userProfilesStore.getOrFetchProfile(user1Id);
            expect(profile).toBe(user1Profile);
            // same method again
            expect(await userProfilesStore.getOrFetchProfile(user1Id)).toBe(user1Profile);
            // assert that the profile is cached
            expect(userProfilesStore.getProfile(user1Id)).toBe(user1Profile);
        });
    });

    describe("getProfileLookupError", () => {
        it("should return undefined if a profile was not fetched", () => {
            expect(userProfilesStore.getProfileLookupError(user1Id)).toBeUndefined();
        });

        it("should return undefined if a profile was successfully fetched", async () => {
            await userProfilesStore.fetchProfile(user1Id);
            expect(userProfilesStore.getProfileLookupError(user1Id)).toBeUndefined();
        });

        it("should return the error if there was one", async () => {
            await userProfilesStore.fetchProfile(userIdDoesNotExist);
            expect(userProfilesStore.getProfileLookupError(userIdDoesNotExist)).toBe(userDoesNotExistError);
        });
    });

    it("getOnlyKnownProfile should return undefined if the profile was not fetched", () => {
        expect(userProfilesStore.getOnlyKnownProfile(user1Id)).toBeUndefined();
    });

    describe("fetchOnlyKnownProfile", () => {
        it("should return undefined if no room shared with the user", async () => {
            const profile = await userProfilesStore.fetchOnlyKnownProfile(user1Id);
            expect(profile).toBeUndefined();
            expect(userProfilesStore.getOnlyKnownProfile(user1Id)).toBeUndefined();
        });

        it("for a known user should return the profile from the API and cache it", async () => {
            const profile = await userProfilesStore.fetchOnlyKnownProfile(user2Id);
            expect(profile).toBe(user2Profile);
            expect(userProfilesStore.getOnlyKnownProfile(user2Id)).toBe(user2Profile);
        });

        it("for a known user not found via API should return null and cache it", async () => {
            const profile = await userProfilesStore.fetchOnlyKnownProfile(user3Id);
            expect(profile).toBeNull();
            expect(userProfilesStore.getOnlyKnownProfile(user3Id)).toBeNull();
        });
    });

    describe("when there are cached values and membership updates", () => {
        beforeEach(async () => {
            await userProfilesStore.fetchProfile(user1Id);
            await userProfilesStore.fetchOnlyKnownProfile(user2Id);
        });

        describe("and membership events with the same values appear", () => {
            beforeEach(() => {
                const roomMember1 = mkRoomMember(room.roomId, user1Id);
                roomMember1.rawDisplayName = user1Profile.displayname!;
                roomMember1.getMxcAvatarUrl = () => undefined;
                mockClient.emit(RoomMemberEvent.Membership, {} as MatrixEvent, roomMember1);

                const roomMember2 = mkRoomMember(room.roomId, user2Id);
                roomMember2.rawDisplayName = user2Profile.displayname!;
                roomMember2.getMxcAvatarUrl = () => undefined;
                mockClient.emit(RoomMemberEvent.Membership, {} as MatrixEvent, roomMember2);
            });

            it("should not invalidate the cache", () => {
                expect(userProfilesStore.getProfile(user1Id)).toBe(user1Profile);
                expect(userProfilesStore.getOnlyKnownProfile(user2Id)).toBe(user2Profile);
            });
        });
    });

    describe("flush", () => {
        it("should clear profiles, known profiles and errors", async () => {
            await userProfilesStore.fetchOnlyKnownProfile(user1Id);
            await userProfilesStore.fetchProfile(user1Id);
            await userProfilesStore.fetchProfile(userIdDoesNotExist);

            userProfilesStore.flush();

            expect(userProfilesStore.getProfile(user1Id)).toBeUndefined();
            expect(userProfilesStore.getOnlyKnownProfile(user1Id)).toBeUndefined();
            expect(userProfilesStore.getProfileLookupError(userIdDoesNotExist)).toBeUndefined();
        });
    });
});