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import * as React from "react";
import * as ReactDOM from "react-dom";
import "./Timeline.scss";
import { CollectionSubView } from "../collections/CollectionSubView";
import { Document, listSpec, createSchema, makeInterface, defaultSpec } from "../../../new_fields/Schema";
import { observer} from "mobx-react";
import { Track } from "./Track";
import { observable, reaction, action, IReactionDisposer, observe, IObservableArray, computed, toJS, Reaction } from "mobx";
import { Cast } from "../../../new_fields/Types";
import { SelectionManager } from "../../util/SelectionManager";
import { List } from "../../../new_fields/List";
import { Self } from "../../../new_fields/FieldSymbols";
import { Doc, DocListCast } from "../../../new_fields/Doc";
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faCircle, faPlayCircle, faBackward, faForward } from "@fortawesome/free-solid-svg-icons";
@observer
export class Timeline extends CollectionSubView(Document){
@observable private _scrubberbox = React.createRef<HTMLDivElement>()
@observable private _currentBarX:number = 0;
@observable private _windSpeed:number = 1;
@observable private _isPlaying:boolean = false;
@observable private _boxLength:number = 0;
@observable private _nodes:List<Doc> = new List<Doc>();
@observable private _time = 100000; //DEFAULT
@observable private _ticks: number[] = [];
private _reactionDisposers: IReactionDisposer[] = [];
@action
componentDidMount(){
let scrubber = this._scrubberbox.current!;
this._boxLength = scrubber.getBoundingClientRect().width;
let children = Cast(this.props.Document[this.props.fieldKey], listSpec(Doc));
if (!children) {
return;
}
let childrenList = ((children[Self] as any).__fields) as List<Doc>;
this._nodes = (childrenList) as List<Doc>;
//check if this is a video frame
let boxWidth = scrubber.getBoundingClientRect().width;
for (let i = 0; i < this._time; ) {
this._ticks.push(i);
i += 1000;
}
}
componentWillUnmount(){
}
//for playing
@action
onPlay = async (e: React.MouseEvent) => {
if (this._isPlaying) {
this._isPlaying = false;
} else {
this._isPlaying = true;
this.changeCurrentX();
}
}
@action
changeCurrentX = () => {
if (this._currentBarX >= this._boxLength && this._isPlaying) {
this._currentBarX = 0;
}
if (this._currentBarX <= this._boxLength && this._isPlaying) {
this._currentBarX = this._currentBarX + this._windSpeed;
setTimeout(this.changeCurrentX, 15);
}
}
@action
windForward = (e: React.MouseEvent) => {
if (this._windSpeed < 64) { //max speed is 32
this._windSpeed = this._windSpeed * 2;
}
}
@action
windBackward = (e: React.MouseEvent) => {
if (this._windSpeed > 1 / 16) { // min speed is 1/8
this._windSpeed = this._windSpeed / 2;
}
}
//for scrubber action
@action
onScrubberDown = (e:React.PointerEvent) => {
e.preventDefault();
e.stopPropagation();
let scrubberbox = this._scrubberbox.current!;
//let left = scrubberbox.getBoundingClientRect().left;
//let offsetX = Math.round(e.clientX - left);
let mouse = e.nativeEvent;
this._currentBarX = mouse.offsetX;
document.addEventListener("pointermove", this.onScrubberMove);
document.addEventListener("pointerup", this.onScrubberFinished);
}
@action
onScrubberMove = (e: PointerEvent) => {
e.preventDefault();
e.stopPropagation();
let scrubberbox = this._scrubberbox.current!;
let left = scrubberbox.getBoundingClientRect().left;
let offsetX = Math.round(e.clientX - left);
this._currentBarX = offsetX;
}
onScrubberFinished = (e: PointerEvent) => {
e.preventDefault();
e.stopPropagation();
let scrubberbox = this._scrubberbox.current!;
document.removeEventListener("pointermove", this.onScrubberMove);
}
toTime = (time:number):string => {
const inSeconds = time / 1000;
let min:(string|number) = Math.floor(inSeconds / 60);
let sec:(string|number) = inSeconds % 60;
if (Math.floor(sec/10) === 0){
sec = "0" + sec;
}
return `${min}:${sec}`;
}
render(){
return (
<div className="timeline-container">
<div className="toolbox">
<div onClick={this.windBackward}> <FontAwesomeIcon icon={faBackward} size="lg"/> </div>
<div onClick={this.onPlay}> <FontAwesomeIcon icon={faPlayCircle} size="lg"/> </div>
<div onClick={this.windForward}> <FontAwesomeIcon icon={faForward} size="lg"/> </div>
</div>
<div></div>
<div className="scrubberbox" ref ={this._scrubberbox}>
{this._ticks.map(element => {return <div className="tick" style={{transform:`translate(${element / 20}px)`, position:"absolute"}}> <p>{this.toTime(element)}</p></div>})}
</div>
<div className="scrubber" onPointerDown = {this.onScrubberDown} style={{transform:`translate(${this._currentBarX}px)`}}>
<FontAwesomeIcon className="scrubberhead" icon={faCircle}/>;
</div>
<div className="trackbox">
{this._nodes.map(doc => {return <Track node={(doc as any).value() as Doc}/>;})}
</div>
</div>
);
}
}
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