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

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

const addState = connect(
    function receiveState(state) {
        const { animCb } = state;
        return { animCb };
    }
);

function projectile(x, y, radius, colour) {
    return (
        <circle
            cx={x}
            cy={y}
            r={radius}
            fill={colour}
            stroke="none"
            opacity="0"
        />
    );
}

class Purify extends Component {
    constructor() {
        super();
        this.animations = [];
        const points = [
            [80, 240],
            [176, 240],
            [212, 216],
            [44, 216],
            [80, 240],
            [248, 192],
            [8, 192],
        ];
        this.charges = points.map(coord => projectile(coord[0], coord[1], 12, COLOURS.GREEN));
    }

    render() {
        return (
            <svg
                class='skill-animation green'
                version="1.1"
                id="purify"
                xmlns="http://www.w3.org/2000/svg"
                style={{ transform: 'rotate3d(1, 0, 0, 180deg)' }}
                viewBox="0 0 256 256">
                <filter id='purifyFilter'>
                    <feGaussianBlur stdDeviation="3"/>
                    <feColorMatrix mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 19 -9" result="cutoff"/>
                    <feComposite operator="atop" in="SourceGraphic" in2="cutoff"/>
                </filter>
                <g id="block">
                    <polyline
                        points='128,168 80,240 176,240 128,168'
                        style={{ filter: 'url("#purifyFilter")' }}
                    />
                    <polyline
                        points='176,240 212,216 128,96 44,216 80,240'
                        style={{ filter: 'url("#purifyFilter")' }}
                    />
                    <polyline
                        points='212,216 248,192 128,24 8,192 44,216'
                        style={{ filter: 'url("#purifyFilter")' }}
                    />
                </g>
                <g filter="url(#purifyFilter)">
                    {this.charges}
                </g>
            </svg>
        );
    }

    componentDidMount() {
        this.animations.push(anime({
            targets: ['#purify'],
            opacity: [
                { value: 1, delay: TIMES.TARGET_DELAY_MS, duration: TIMES.TARGET_DURATION_MS * 0.2 },
                { value: 0, delay: TIMES.TARGET_DURATION_MS * 0.6, duration: TIMES.TARGET_DURATION_MS * 0.2 },
            ],
            easing: 'easeInOutSine',
        }));

        this.animations.push(anime({
            targets: ['#block'],
            opacity: [
                { value: 0, delay: TIMES.TARGET_DELAY_MS, duration: TIMES.TARGET_DURATION_MS },
            ],
            easing: 'easeInOutSine',
        }));

        this.animations.push(anime({
            targets: ['#purify circle'],
            opacity: [
                { value: 1, duration: TIMES.TARGET_DELAY_MS + TIMES.TARGET_DURATION_MS * 0.2 },
            ],
            easing: 'easeInOutSine',
            cx: 128,
            cy: 24,
            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();
        }
        this.props.animCb();
    }
}

module.exports = addState(Purify);
