const preact = require('preact');
const { Component } = require('preact');
const anime = require('animejs').default;

const { TIMES } = require('../../constants');

class Block extends Component {
    constructor() {
        super();
        this.animations = [];
    }

    render() {
        return (
            <svg
                class='skill-animation red'
                version="1.1"
                id="block"
                xmlns="http://www.w3.org/2000/svg"
                style={{ transform: 'rotate(180deg)' }}
                viewBox="0 0 256 256">
                <filter id='blockFilter'>
                    <feTurbulence type="turbulence" baseFrequency="0.05" numOctaves="2" result="turbulence"></feTurbulence>
                    <feDisplacementMap in2="turbulence" in="SourceGraphic" scale="15" xChannelSelector="R" yChannelSelector="G"></feDisplacementMap>
                </filter>
                <polygon
                    points='128,168 80,240 176,240'
                    style={{ filter: 'url("#blockFilter")' }}
                    id="charge"/>
                <polyline
                    points='176,240 212,216 128,96 44,216 80,240'
                    style={{ filter: 'url("#blockFilter")' }}
                    id="charge"/>
                <polyline
                    points='212,216 248,192 128,24 8,192 44,216'
                    style={{ filter: 'url("#blockFilter")' }}
                    id="charge"/>
            </svg>
        );
    }

    componentDidMount() {
        this.animations.push(anime({
            targets: ['#block'],
            opacity: 1,

            delay: TIMES.TARGET_DELAY_MS,
            duration: TIMES.TARGET_DELAY_MS,
        }));

        this.animations.push(anime({
            targets: ['#blockFilter feTurbulence', ' #blockFilter feDisplacementMap'],
            baseFrequency: 0,
            scale: 1,
            easing: 'easeOutSine',

            delay: TIMES.TARGET_DELAY_MS,
            duration: TIMES.TARGET_DURATION_MS,
        }));
    }

    // this is necessary because
    // skipping / timing / unmounting race conditions
    // can cause the animations to cut short, this will ensure the values are reset
    // because preact will recycle all these components
    componentWillUnmount() {
        for (let i = this.animations.length - 1; i >= 0; i--) {
            this.animations[i].reset();
        }
    }
}

module.exports = Block;
