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

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="url(#grad1)"
            stroke-width="2"
            stroke={colour}
            filter="url(#explosion)"
        />
    );
}

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

    render() {
        return (
            <svg
                id='blast'
                class="skill-animation"
                version="1.1"
                transform-box='fill-box'
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 300 300">
                <defs>
                    <filter id="blastFilter">
                        <feGaussianBlur in="SourceGraphic" stdDeviation="3" />
                        <feMerge>
                            <feMergeNode />
                            <feMergeNode in="SourceGraphic" />
                        </feMerge>
                    </filter>
                </defs>
                <g>
                    {times(50, () => (
                        <g>
                            <rect filter="url(#blastFilter)" class="blue" x="150" y="200" width="3" height="5" />
                            <rect filter="url(#blastFilter)" class="white" x="150" y="200" width="1" height="3" />
                        </g>
                    ))}
                </g>
            </svg>
        );
    }

    componentDidMount() {
        this.animations.push(anime({
            targets: ['#blast'],
            opacity: [
                { value: 1, delay: TIMES.TARGET_DELAY_MS, duration: TIMES.TARGET_DURATION_MS * 0.2 },
                { value: 0, delay: TIMES.TARGET_DURATION_MS * 0.5, duration: TIMES.TARGET_DURATION_MS * 0.2 },
            ],
            easing: 'easeInOutSine',
        }));

        this.animations.push(anime({
            targets: ['#blast g'],
            transform: () => `
                translate(${anime.random(-100, 100)} ${anime.random(-100, 100)})
            `,
            style: { rotate: anime.random(-180, 180) },
            easing: 'easeOutCubic',
            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(Blast);
