/*
    This file is part of keks-meet (https://codeberg.org/metamuffin/keks-meet)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2022 metamuffin <metamuffin@disroot.org>
*/
/// <reference lib="dom" />

import { ProvideInfo } from "../../../common/packets.d.ts";
import { ebutton } from "../helper.ts";
import { TrackHandle } from "../track_handle.ts";
import { LocalUser } from "../user/local.ts";
import { User } from "../user/mod.ts";
import { Resource } from "./mod.ts";

export class TrackResource extends Resource {
    private _track?: TrackHandle
    constructor(user: User, info: ProvideInfo, track?: TrackHandle) {
        super(user, info)
        this.track = track
    }

    get track() { return this._track }
    set track(value: TrackHandle | undefined) {
        const handle_end = () => {
            this.track = undefined
            if (this.user instanceof LocalUser) this.destroy()
        }
        this._track?.removeEventListener("ended", handle_end)
        this._track = value
        this._track?.addEventListener("ended", handle_end)
        this.update_el()
    }

    destroy() {
        this.track?.end()
        super.destroy()
    }

    create_element() {
        const el = document.createElement("div")
        if (!this.track?.local) {
            el.append(ebutton(`${this.track ? "Disable" : "Enable"} ${this.info.kind}`, {
                onclick: (e) => {
                    (e as HTMLButtonElement).disabled = true;
                    this.track ? this.request_stop() : this.request()
                }
            }))
        }
        if (this.track) {
            const is_video = this.track.kind == "video"
            const media_el = is_video ? document.createElement("video") : document.createElement("audio")
            const stream = new MediaStream([this.track.track])
            media_el.srcObject = stream
            media_el.classList.add("media")
            media_el.autoplay = true
            media_el.controls = true
            if (this.track.local) media_el.muted = true
            el.append(media_el)

            if (this.track.local) {
                const end_button = document.createElement("button")
                end_button.textContent = "End"
                end_button.addEventListener("click", () => {
                    this.track?.end()
                })
                el.append(end_button)
            }
            this.el.append(el)
            this.track.addEventListener("ended", () => {
                media_el.srcObject = null // TODO
                el.remove()
            })
        }
        return el
    }
}