/*
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 React, { useCallback, useEffect, useState } from "react";
import { MatrixEvent, RoomMember } from "matrix-js-sdk/src/matrix";
import { Button, Tooltip } from "@vector-im/compound-web";
import { Icon as VideoCallIcon } from "@vector-im/compound-design-tokens/icons/video-call-solid.svg";

import { _t } from "../languageHandler";
import RoomAvatar from "../components/views/avatars/RoomAvatar";
import { MatrixClientPeg } from "../MatrixClientPeg";
import defaultDispatcher from "../dispatcher/dispatcher";
import { ViewRoomPayload } from "../dispatcher/payloads/ViewRoomPayload";
import { Action } from "../dispatcher/actions";
import ToastStore from "../stores/ToastStore";
import {
    LiveContentSummary,
    LiveContentSummaryWithCall,
    LiveContentType,
} from "../components/views/rooms/LiveContentSummary";
import { useCall, useJoinCallButtonDisabledTooltip } from "../hooks/useCall";
import AccessibleButton, { ButtonEvent } from "../components/views/elements/AccessibleButton";
import { useDispatcher } from "../hooks/useDispatcher";
import { ActionPayload } from "../dispatcher/payloads";
import { Call, CallEvent } from "../models/Call";
import LegacyCallHandler, { AudioID } from "../LegacyCallHandler";
import { useEventEmitter } from "../hooks/useEventEmitter";
import { CallStore, CallStoreEvent } from "../stores/CallStore";

export const getIncomingCallToastKey = (callId: string, roomId: string): string => `call_${callId}_${roomId}`;
const MAX_RING_TIME_MS = 10 * 1000;

interface JoinCallButtonWithCallProps {
    onClick: (e: ButtonEvent) => void;
    call: Call | null;
    disabledTooltip: string | undefined;
}

function JoinCallButtonWithCall({ onClick, call, disabledTooltip }: JoinCallButtonWithCallProps): JSX.Element {
    let disTooltip = disabledTooltip;
    const disabledBecauseFullTooltip = useJoinCallButtonDisabledTooltip(call);
    disTooltip = disabledTooltip ?? disabledBecauseFullTooltip ?? undefined;

    return (
        <Tooltip label={disTooltip ?? _t("voip|video_call")}>
            <Button
                className="mx_IncomingCallToast_joinButton"
                onClick={onClick}
                disabled={disTooltip != undefined}
                kind="primary"
                Icon={VideoCallIcon}
                size="sm"
            >
                {_t("action|join")}
            </Button>
        </Tooltip>
    );
}

interface Props {
    notifyEvent: MatrixEvent;
}

export function IncomingCallToast({ notifyEvent }: Props): JSX.Element {
    const roomId = notifyEvent.getRoomId()!;
    const room = MatrixClientPeg.safeGet().getRoom(roomId) ?? undefined;
    const call = useCall(roomId);
    const [connectedCalls, setConnectedCalls] = useState<Call[]>(Array.from(CallStore.instance.connectedCalls));
    useEventEmitter(CallStore.instance, CallStoreEvent.ConnectedCalls, () => {
        setConnectedCalls(Array.from(CallStore.instance.connectedCalls));
    });
    const otherCallIsOngoing = connectedCalls.find((call) => call.roomId !== roomId);
    // Start ringing if not already.
    useEffect(() => {
        const isRingToast = (notifyEvent.getContent() as unknown as { notify_type: string })["notify_type"] == "ring";
        if (isRingToast && !LegacyCallHandler.instance.isPlaying(AudioID.Ring)) {
            LegacyCallHandler.instance.play(AudioID.Ring);
        }
    }, [notifyEvent]);

    // Stop ringing on dismiss.
    const dismissToast = useCallback((): void => {
        ToastStore.sharedInstance().dismissToast(
            getIncomingCallToastKey(notifyEvent.getContent().call_id ?? "", roomId),
        );
        LegacyCallHandler.instance.pause(AudioID.Ring);
    }, [notifyEvent, roomId]);

    // Dismiss if session got ended remotely.
    const onCall = useCallback(
        (call: Call, callRoomId: string): void => {
            const roomId = notifyEvent.getRoomId();
            if (!roomId && roomId !== callRoomId) return;
            if (call === null || call.participants.size === 0) {
                dismissToast();
            }
        },
        [dismissToast, notifyEvent],
    );

    // Dismiss if antother device from this user joins.
    const onParticipantChange = useCallback(
        (participants: Map<RoomMember, Set<string>>, prevParticipants: Map<RoomMember, Set<string>>) => {
            if (Array.from(participants.keys()).some((p) => p.userId == room?.client.getUserId())) {
                dismissToast();
            }
        },
        [dismissToast, room?.client],
    );

    // Dismiss on timeout.
    useEffect(() => {
        const timeout = setTimeout(dismissToast, MAX_RING_TIME_MS);
        return () => clearTimeout(timeout);
    });

    // Dismiss on viewing call.
    useDispatcher(
        defaultDispatcher,
        useCallback(
            (payload: ActionPayload) => {
                if (payload.action === Action.ViewRoom && payload.room_id === roomId && payload.view_call) {
                    dismissToast();
                }
            },
            [roomId, dismissToast],
        ),
    );

    // Dismiss on clicking join.
    const onJoinClick = useCallback(
        (e: ButtonEvent): void => {
            e.stopPropagation();

            // The toast will be automatically dismissed by the dispatcher callback above
            defaultDispatcher.dispatch<ViewRoomPayload>({
                action: Action.ViewRoom,
                room_id: room?.roomId,
                view_call: true,
                skipLobby: "shiftKey" in e ? e.shiftKey : false,
                metricsTrigger: undefined,
            });
        },
        [room],
    );

    // Dismiss on closing toast.
    const onCloseClick = useCallback(
        (e: ButtonEvent): void => {
            e.stopPropagation();

            dismissToast();
        },
        [dismissToast],
    );

    useEventEmitter(CallStore.instance, CallStoreEvent.Call, onCall);
    useEventEmitter(call ?? undefined, CallEvent.Participants, onParticipantChange);

    return (
        <>
            <div>
                <RoomAvatar room={room ?? undefined} size="24px" />
            </div>
            <div className="mx_IncomingCallToast_content">
                <div className="mx_IncomingCallToast_info">
                    <span className="mx_IncomingCallToast_room">
                        {room ? room.name : _t("voip|call_toast_unknown_room")}
                    </span>
                    <div className="mx_IncomingCallToast_message">{_t("voip|video_call_started")}</div>
                    {call ? (
                        <LiveContentSummaryWithCall call={call} />
                    ) : (
                        <LiveContentSummary
                            type={LiveContentType.Video}
                            text={_t("common|video")}
                            active={false}
                            participantCount={0}
                        />
                    )}
                </div>
                <JoinCallButtonWithCall
                    onClick={onJoinClick}
                    call={call}
                    disabledTooltip={otherCallIsOngoing ? "Ongoing call" : undefined}
                />
            </div>
            <AccessibleButton
                className="mx_IncomingCallToast_closeButton"
                onClick={onCloseClick}
                title={_t("action|close")}
            />
        </>
    );
}