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

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

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

    render() {
        return (
            <svg
                id='curse'
                class="skill-animation blue"
                version="1.1"
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 198 200">
                <defs>
                    <filter id="curseFilter">
                        <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
                        <feMerge>
                            <feMergeNode />
                            <feMergeNode in="SourceGraphic" />
                        </feMerge>
                    </filter>
                </defs>
                <g filter="url(#curseFilter)">
                    <ellipse cx="100" cy="100" rx="30" ry="30"/>
                    <ellipse cx="100" cy="100" rx="60" ry="60"/>
                    <ellipse cx="100" cy="100" rx="90" ry="90"/>
                </g>
            </svg>
        );
    }

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

            easing: 'easeOutExpo',
            delay: TIMES.TARGET_DELAY_MS,
            duration: TIMES.TARGET_DELAY_MS,
        }));

        this.animations.push(anime({
            targets: ['#curse'],
            scale: [0.5, 1],
            stroke: [COLOURS.WHITE, COLOURS.BLUE],
            strokeWidth: [8, 0],
            filter: [`drop-shadow(0 0 5px ${COLOURS.WHITE}`, `drop-shadow(0 0 5px ${COLOURS.BLUE}`],
            easing: 'easeOutSine',
            delay: TIMES.TARGET_DELAY_MS,
            duration: TIMES.START_SKILL,
        }));
    }

    // 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 = Curse;
