/*
Copyright 2021 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 { MatrixClient } from "matrix-js-sdk/src/client";
import { MatrixEvent } from "matrix-js-sdk/src/models/event";
import { EventType } from "matrix-js-sdk/src/@types/event";

import { AsyncStoreWithClient } from "../../src/stores/AsyncStoreWithClient";
import { mkEvent, mkStubRoom } from "../test-utils";
import { EnhancedMap } from "../../src/utils/maps";
import { EventEmitter } from "events";

// These methods make some use of some private methods on the AsyncStoreWithClient to simplify getting into a consistent
// ready state without needing to wire up a dispatcher and pretend to be a js-sdk client.

export const setupAsyncStoreWithClient = async (store: AsyncStoreWithClient<any>, client: MatrixClient) => {
    // @ts-ignore
    store.readyStore.useUnitTestClient(client);
    // @ts-ignore
    await store.onReady();
};

export const resetAsyncStoreWithClient = async (store: AsyncStoreWithClient<any>) => {
    // @ts-ignore
    await store.onNotReady();
};

export const mockStateEventImplementation = (events: MatrixEvent[]) => {
    const stateMap = new EnhancedMap<string, Map<string, MatrixEvent>>();
    events.forEach(event => {
        stateMap.getOrCreate(event.getType(), new Map()).set(event.getStateKey(), event);
    });

    return (eventType: string, stateKey?: string) => {
        if (stateKey || stateKey === "") {
            return stateMap.get(eventType)?.get(stateKey) || null;
        }
        return Array.from(stateMap.get(eventType)?.values() || []);
    };
};

export const mkRoom = (client: MatrixClient, roomId: string, rooms?: ReturnType<typeof mkStubRoom>[]) => {
    const room = mkStubRoom(roomId, roomId, client);
    room.currentState.getStateEvents.mockImplementation(mockStateEventImplementation([]));
    rooms?.push(room);
    return room;
};

export const mkSpace = (
    client: MatrixClient,
    spaceId: string,
    rooms?: ReturnType<typeof mkStubRoom>[],
    children: string[] = [],
) => {
    const space = mkRoom(client, spaceId, rooms);
    space.isSpaceRoom.mockReturnValue(true);
    space.currentState.getStateEvents.mockImplementation(mockStateEventImplementation(children.map(roomId =>
        mkEvent({
            event: true,
            type: EventType.SpaceChild,
            room: spaceId,
            user: "@user:server",
            skey: roomId,
            content: { via: [] },
            ts: Date.now(),
        }),
    )));
    return space;
};

export const emitPromise = (e: EventEmitter, k: string | symbol) => new Promise(r => e.once(k, r));