import {ClientIcon} from "svg-sprites/client-icons";
import {VideoBroadcastType} from "tc-shared/connection/VideoConnection";
import {LogCategory, logWarn} from "tc-shared/log";

export const kLocalVideoId = "__local__video__";
export const kLocalBroadcastChannels: VideoBroadcastType[] = ["screen", "camera"];

export type ChannelVideoInfo = { clientName: string, clientUniqueId: string, clientId: number, statusIcon: ClientIcon };
export type ChannelVideoStreamState = "available" | "streaming" | "ignored" | "none";

export type VideoStatistics = {
    type: "sender",
    mode: "camara" | "screen",

    dimensions: { width: number, height: number },
    frameRate: number,

    codec: { name: string, payloadType: number }

    maxBandwidth: number,
    bandwidth: number,

    qualityLimitation: "cpu" | "bandwidth",

    source: {
        frameRate: number,
        dimensions: { width: number, height: number },
    }
} | {
    type: "receiver",
    mode: "camara" | "screen",

    dimensions: { width: number, height: number },
    frameRate: number,

    codec: { name: string, payloadType: number }
};

export type VideoStreamState = {
    state: "disconnected"
} | {
    state: "available"
} | {
    state: "connecting"
} | {
    /* like join failed or whatever */
    state: "failed",
    reason?: string
} | {
    state: "connected",
    stream: MediaStream
};

export type VideoSubscribeInfo = {
    totalSubscriptions: number,
    subscribedStreams: {[T in VideoBroadcastType]: number},

    subscribeLimits: {[T in VideoBroadcastType]?: number},
    maxSubscriptions: number | undefined
};

/**
 * "muted": The video has been muted locally
 * "unset": The video will be normally played
 * "empty": No video available
 */
export type LocalVideoState = "muted" | "unset" | "empty";

export interface ChannelVideoEvents {
    action_toggle_expended: { expended: boolean },
    action_video_scroll: { direction: "left" | "right" },
    action_toggle_spotlight: {
        videoIds: string[],
        enabled: boolean,
        expend: boolean
    },
    action_focus_spotlight: {},
    action_set_fullscreen: { videoId: string | undefined },
    action_set_pip: { videoId: string | undefined, broadcastType: VideoBroadcastType },
    action_toggle_mute: { videoId: string, broadcastType: VideoBroadcastType | undefined, muted: boolean },
    action_dismiss: { videoId: string, broadcastType: VideoBroadcastType },
    action_show_viewers: {},

    query_expended: {},
    query_videos: {},
    query_video: { videoId: string },
    query_video_info: { videoId: string },
    query_video_statistics: { videoId: string, broadcastType: VideoBroadcastType },
    query_spotlight: {},
    query_video_stream: { videoId: string, broadcastType: VideoBroadcastType },
    query_subscribe_info: {},
    query_viewer_count: {},

    notify_expended: { expended: boolean },
    notify_videos: {
        videoIds: string[]
    },
    notify_video: {
        videoId: string,

        cameraStream: ChannelVideoStreamState,
        screenStream: ChannelVideoStreamState,
    },
    notify_video_info: {
        videoId: string,
        info: ChannelVideoInfo
    },
    notify_video_info_status: {
        videoId: string,
        statusIcon: ClientIcon
    },
    notify_spotlight: {
        videoId: string[]
    },
    notify_video_statistics: {
        videoId: string | undefined,
        broadcastType: VideoBroadcastType,
        statistics: VideoStatistics
    },
    notify_video_stream: {
        videoId: string,
        broadcastType: VideoBroadcastType,
        state: VideoStreamState
    },
    notify_subscribe_info: {
        info: VideoSubscribeInfo
    },
    notify_viewer_count: {
        camera: number | undefined,
        screen: number | undefined,
    }
}

export function makeVideoAutoplay(video: HTMLVideoElement) : () => void {
    let replayTimeout;

    video.autoplay = true;

    const executePlay = () => {
        if(replayTimeout) {
            return;
        }

        video.play().then(undefined).catch(() => {
            logWarn(LogCategory.VIDEO, tr("Failed to start video replay. Retrying in 500ms intervals."));
            replayTimeout = setInterval(() => {
                video.play().then(() => {
                    clearInterval(replayTimeout);
                    replayTimeout = undefined;
                }).catch(() => {});
            });
        });
    };

    const listenerPause = () => {
        logWarn(LogCategory.VIDEO, tr("Video replay paused. Executing play again."));
        executePlay();
    };

    const listenerEnded = () => {
        logWarn(LogCategory.VIDEO, tr("Video replay ended. Executing play again."));
        executePlay();
    };

    video.addEventListener("pause", listenerPause);
    video.addEventListener("ended", listenerEnded);
    executePlay();

    return () => {
        clearTimeout(replayTimeout);
        video.removeEventListener("pause", listenerPause);
        video.removeEventListener("ended", listenerEnded);
    };
}