/*
Copyright 2024 New Vector Ltd.
Copyright 2022 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 } from "jest-mock";
import { EventType, MatrixClient, MatrixEvent, MsgType, Room } from "matrix-js-sdk/src/matrix";

import {
    JSONEventFactory,
    MessageEventFactory,
    pickFactory,
    RoomCreateEventFactory,
} from "../../../src/events/EventTileFactory";
import SettingsStore from "../../../src/settings/SettingsStore";
import { createTestClient, mkEvent } from "../../test-utils";

const roomId = "!room:example.com";

describe("pickFactory", () => {
    let client: MatrixClient;
    let room: Room;

    let createEventWithPredecessor: MatrixEvent;
    let createEventWithoutPredecessor: MatrixEvent;
    let dynamicPredecessorEvent: MatrixEvent;

    let utdEvent: MatrixEvent;
    let audioMessageEvent: MatrixEvent;

    beforeAll(() => {
        client = createTestClient();

        room = new Room(roomId, client, client.getSafeUserId());
        mocked(client.getRoom).mockImplementation((getRoomId: string): Room | null => {
            if (getRoomId === room.roomId) return room;
            return null;
        });

        createEventWithoutPredecessor = mkEvent({
            event: true,
            type: EventType.RoomCreate,
            user: client.getUserId()!,
            room: roomId,
            content: {
                creator: client.getUserId()!,
                room_version: "9",
            },
        });
        createEventWithPredecessor = mkEvent({
            event: true,
            type: EventType.RoomCreate,
            user: client.getUserId()!,
            room: roomId,
            content: {
                creator: client.getUserId()!,
                room_version: "9",
                predecessor: {
                    room_id: "roomid1",
                    event_id: null,
                },
            },
        });
        dynamicPredecessorEvent = mkEvent({
            event: true,
            type: EventType.RoomPredecessor,
            user: client.getUserId()!,
            room: roomId,
            skey: "",
            content: {
                predecessor_room_id: "roomid2",
                last_known_event_id: null,
            },
        });
        audioMessageEvent = mkEvent({
            event: true,
            type: EventType.RoomMessage,
            user: client.getUserId()!,
            room: roomId,
            content: {
                msgtype: MsgType.Audio,
            },
        });
        utdEvent = mkEvent({
            event: true,
            type: EventType.RoomMessage,
            user: client.getUserId()!,
            room: roomId,
            content: {
                msgtype: "m.bad.encrypted",
            },
        });
    });

    it("should return JSONEventFactory for a no-op m.room.power_levels event", () => {
        const event = new MatrixEvent({
            type: EventType.RoomPowerLevels,
            state_key: "",
            content: {},
            sender: client.getUserId()!,
            room_id: roomId,
        });
        expect(pickFactory(event, client, true)).toBe(JSONEventFactory);
    });

    describe("when showing hidden events", () => {
        it("should return a JSONEventFactory for a room create event without predecessor", () => {
            room.currentState.events.set(
                EventType.RoomCreate,
                new Map([[createEventWithoutPredecessor.getStateKey()!, createEventWithoutPredecessor]]),
            );
            room.currentState.events.set(EventType.RoomPredecessor, new Map());
            expect(pickFactory(createEventWithoutPredecessor, client, true)).toBe(JSONEventFactory);
        });

        it("should return a MessageEventFactory for an audio message event", () => {
            expect(pickFactory(audioMessageEvent, client, true)).toBe(MessageEventFactory);
        });
    });

    describe("when not showing hidden events", () => {
        describe("without dynamic predecessor support", () => {
            beforeEach(() => {
                jest.spyOn(SettingsStore, "getValue").mockReset();
            });

            it("should return undefined for a room without predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithoutPredecessor.getStateKey()!, createEventWithoutPredecessor]]),
                );
                room.currentState.events.set(EventType.RoomPredecessor, new Map());
                expect(pickFactory(createEventWithoutPredecessor, client, false)).toBeUndefined();
            });

            it("should return a RoomCreateFactory for a room with fixed predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithPredecessor.getStateKey()!, createEventWithPredecessor]]),
                );
                room.currentState.events.set(EventType.RoomPredecessor, new Map());
                expect(pickFactory(createEventWithPredecessor, client, false)).toBe(RoomCreateEventFactory);
            });

            it("should return undefined for a room with dynamic predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithoutPredecessor.getStateKey()!, createEventWithoutPredecessor]]),
                );
                room.currentState.events.set(
                    EventType.RoomPredecessor,
                    new Map([[dynamicPredecessorEvent.getStateKey()!, dynamicPredecessorEvent]]),
                );
                expect(pickFactory(createEventWithoutPredecessor, client, false)).toBeUndefined();
            });
        });

        describe("with dynamic predecessor support", () => {
            beforeEach(() => {
                jest.spyOn(SettingsStore, "getValue")
                    .mockReset()
                    .mockImplementation((settingName) => settingName === "feature_dynamic_room_predecessors");
            });

            it("should return undefined for a room without predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithoutPredecessor.getStateKey()!, createEventWithoutPredecessor]]),
                );
                room.currentState.events.set(EventType.RoomPredecessor, new Map());
                expect(pickFactory(createEventWithoutPredecessor, client, false)).toBeUndefined();
            });

            it("should return a RoomCreateFactory for a room with fixed predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithPredecessor.getStateKey()!, createEventWithPredecessor]]),
                );
                room.currentState.events.set(EventType.RoomPredecessor, new Map());
                expect(pickFactory(createEventWithPredecessor, client, false)).toBe(RoomCreateEventFactory);
            });

            it("should return a RoomCreateFactory for a room with dynamic predecessor", () => {
                room.currentState.events.set(
                    EventType.RoomCreate,
                    new Map([[createEventWithoutPredecessor.getStateKey()!, createEventWithoutPredecessor]]),
                );
                room.currentState.events.set(
                    EventType.RoomPredecessor,
                    new Map([[dynamicPredecessorEvent.getStateKey()!, dynamicPredecessorEvent]]),
                );
                expect(pickFactory(createEventWithoutPredecessor, client, false)).toBe(RoomCreateEventFactory);
            });
        });

        it("should return a MessageEventFactory for an audio message event", () => {
            expect(pickFactory(audioMessageEvent, client, false)).toBe(MessageEventFactory);
        });

        it("should return a MessageEventFactory for a UTD event", () => {
            expect(pickFactory(utdEvent, client, false)).toBe(MessageEventFactory);
        });
    });
});