const preact = require('preact');
const { Component } = require('preact');

const get = require('lodash/get');
const anime = require('animejs').default;

const shapes = require('./components/shapes');

const stringSort = (k, desc) => {
    if (desc) {
        return (a, b) => {
            if (!get(a, k)) return 1;
            if (!get(b, k)) return -1;
            return get(b, k).localeCompare(get(a, k));
        };
    }
    return (a, b) => {
        if (!get(a, k)) return 1;
        if (!get(b, k)) return -1;
        return get(a, k).localeCompare(get(b, k));
    };
};

const numSort = (k, desc) => {
    if (desc) {
        return (a, b) => {
            if (!get(a, k)) return 1;
            if (!get(b, k)) return -1;
            return get(b, k) - get(a, k);
        };
    }
    return (a, b) => {
        if (!get(a, k)) return 1;
        if (!get(b, k)) return -1;
        return get(a, k) - get(b, k);
    };
};

const genAvatar = name => {
    let hash = 0;
    if (name.length === 0) return hash;
    // Probs don't need to hash using the whole string
    for (let i = 0; i < name.length; i += 1) {
        const chr = name.charCodeAt(i);
        hash = ((hash << 5) - hash) + chr;
        hash = hash % 10000;
    }
    return `${hash}`;
};

function requestAvatar(name) {
    const id = genAvatar(name);
    const req = new Request(`/assets/molecules/${id}.svg`);
    return fetch(req)
        .then(res => res.text())
        .then(svg => svg);
}

const animations = {};
function animateConstruct(id) {
    if (animations[id]) return false;
    animations[id] = true;
    const duration = anime.random(2000, 18000);
    const target = document.getElementById(id);
    return anime({
        targets: target,
        translateX: () => anime.random(-20, 20),
        translateY: () => anime.random(0, -40),
        rotate: () => anime.random(-15, 15),
        duration,
        direction: 'alternate',
        easing: 'linear',
        loop: true,
        complete: () => animations[id] = false,
    });
}

function clearAnimation(id) {
    animations[id] = false;
}

class ConstructAvatar extends Component {
    render() {
        return (
            <img
                id={this.props.id}
                src={`/molecules/${genAvatar(this.props.name)}.svg`}
                height="500"
                onError={event => event.target.setAttribute('src', '/molecules/726.svg')}
            />
        );
    }

    componentDidMount() {
        animateConstruct(this.props.id);
    }

    componentWillUnmount() {
        clearAnimation(this.props.id);
    }
}

function instanceConstruct(name, id) {
    // useEffect(() => {
    //     animateConstruct(id);
    //     return () => clearAnimation(id);
    // });

    setTimeout(() => animateConstruct(id), 50);

    return (
        <div
            className="avatar"
            id={id}
            style={{'background-image': `url(/molecules/${genAvatar(name)}.svg)`}}
        />
    );
}

const NULL_UUID = '00000000-0000-0000-0000-000000000000';

const STATS = {
    RedPower: {
        stat: 'red_power',
        colour: 'red',
        svg: shapes.circle,
    },
    GreenPower: {
        stat: 'green_power',
        colour: 'green',
        svg: shapes.circle,
    },
    BluePower: {
        stat: 'blue_power',
        colour: 'blue',
        svg: shapes.circle,
    },
    Speed: {
        stat: 'speed',
        colour: 'white',
        svg: shapes.triangle,
    },
    RedLife: {
        stat: 'red_life',
        colour: 'red',
        svg: shapes.square,
    },
    GreenLife: {
        stat: 'green_life',
        colour: 'green',
        svg: shapes.square,
    },
    BlueLife: {
        stat: 'blue_life',
        colour: 'blue',
        svg: shapes.square,
    },
};


function resoConstructHealth(resolution, currentGame) {
    if (!resolution) return false;

    const modifyHealth = construct => {
        if (construct.id !== resolution.target.id) return false; // not target
        const [type, event] = resolution.event;
        if (type === 'Damage') {
            const { amount, mitigation, colour } = event;
            construct.green_life.value -= amount;
            if (colour === 'Red') {
                construct.red_life.value -= mitigation;
            }
            if (colour === 'Blue') {
                construct.blue_life.value -= mitigation;
            }
        }

        if (type === 'Healing') {
            const { amount } = event;
            construct.green_life.value += amount;
        }

        if (type === 'Recharge') {
            const { red, blue } = event;
            construct.red_life.value += red;
            construct.blue_life.value += blue;
        }
        return true;
    };
    currentGame.players.forEach(player => player.constructs.forEach(modifyHealth));
    return true;

}

function eventClasses(resolution, construct) {
    if (!resolution) return '';
    const startSkill = resolution.stage === 'START_SKILL';
    const endSkill = resolution.stage === 'END_SKILL';
    const postSkill = resolution.stage === 'POST_SKILL';
    const source = construct.id === resolution.source.id;
    const target = construct.id === resolution.target.id;
    // not involved at all. blur them
    if (!(source || target)) return 'unfocus';

    // not the target. just ignore for now
    // if (construct.id !== resolution.target.id) return '';

    const [type, event] = resolution.event;

    if (type === 'Ko') {
        if (target) return 'ko';
    }

    if (type === 'Disable') {
        const { skill, disable } = event;
    }

    if (type === 'Immunity') {
        const { skill, immunity } = event;
    }

    if (type === 'TargetKo') {
        const { skill } = event;
    }

    if (type === 'Damage') {
        const { skill, amount, mitigation, colour } = event;
        // Highlight the flow of damage from source -> target
        if (source && startSkill) return 'active-skill';
        if (target && endSkill) return 'active-skill';

        // Deal damage to construct and return effect
        if (target && postSkill) {
            if (colour === 'Red') {
                return 'red-damage';
            }
            if (colour === 'Blue') {
                return 'blue-damage';
            }
            if (colour === 'Green') return 'green-damage';
        }

    }

    if (type === 'Healing') {
        const { skill, amount, overhealing } = event;
        if (source && startSkill) return 'active-skill';
        if (target && endSkill) return 'active-skill';
        if (target && postSkill) {
            return 'green-damage';
        }
    }

    if (type === 'Inversion') {
        const { skill } = event;
    }

    if (type === 'Reflection') {
        const { skill } = event;
    }

    if (type === 'Effect') {
        const { skill, effect, duration } = event;
        if (source && startSkill) return 'active-skill';
        if (target && endSkill) return 'active-skill';
    }

    if (type === 'Skill') {
        const { skill } = event;
        // Highlight the flow of damage from source -> target
        if (source && startSkill) return 'active-skill';
        if (target && endSkill) return 'active-skill';
    }

    if (type === 'Removal') {
        const { effect } = event;
    }

    if (type === 'Recharge') {
        const { skill, red, blue } = event;
        if (source && startSkill) return 'active-skill';
        if (target && endSkill) return 'active-skill';
        if (target && postSkill) {
            if (red > 0 && blue > 0) return 'purple-damage';
            if (red > 0) return 'red-damage';
            if (blue > 0) return 'blue-damage';
        }
    }

    if (type === 'Evasion') {
        const { skill, evasion_rating } = event;
    }

    return '';
}

function getCombatSequence(event) {
    if (!event) return false;
    // Skip combat animations depending on event type, expandable in future
    const dotTicks = ['DecayTick', 'CorruptionTick', 'TriageTick', 'SiphonTick', 'StrangleTick'];

    if (['Skill', 'AoeSkill'].includes(event[0])) return ['START_SKILL', 'END_SKILL'];
    if (['Immunity'].includes(event[0])) return ['START_SKILL', 'POST_SKILL'];
    if (['Removal'].includes(event[0])) return ['POST_SKILL'];

    if (['Healing'].includes(event[0])
        && (event[1].skill.includes('Slay')
            || event[1].skill.includes('SiphonTick')
            || event[1].skill.includes('Purify')
            || event[1].skill.includes('Sleep'))) return ['POST_SKILL'];

    if (['Recharge'].includes(event[0])
        && (event[1].skill.includes('Reflect'))) return ['POST_SKILL'];


    if (event[0] === 'Effect'
        && (['Ruin', 'Taunt', 'Strangling', 'Parry'].includes(event[1].skill)
        || (event[1].skill.includes('Decay') && event[1].effect === 'Wither'))) return ['POST_SKILL'];

    if (['Power'].includes(event[0])
        && ((event[1].skill.includes('Chaos') && event[1].colour === 'Red')
            || event[1].skill.includes('Silence')
            || event[1].skill.includes('Snare'))) return ['POST_SKILL'];

    if (['Ko'].includes(event[0])
        || (event[1].skill.includes('Throw') && event[1].effect === 'Vulnerable')) return ['POST_SKILL'];

    if (dotTicks.includes(event[1].skill)) return ['END_SKILL', 'POST_SKILL'];
    return ['START_SKILL', 'END_SKILL', 'POST_SKILL'];
}

function getCombatText(construct, resolution) {
    if (!resolution) return ['', ''];


    const [type, event] = resolution.event;
    const source = construct.id === resolution.source.id;
    const target = construct.id === resolution.target.id;
    const startSkill = resolution.stage === 'START_SKILL';
    const endSkill = resolution.stage === 'END_SKILL';
    const postSkill = resolution.stage === 'POST_SKILL';

    if (type === 'Ko') {
        if (postSkill && target) return ['KO!', ''];
    }

    if (type === 'Disable') {
        const { skill, disable } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return [`${disable}`, ''];
    }

    if (type === 'Immunity') {
        const { skill, immunity } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return ['IMMUNE', ''];
    }

    if (type === 'TargetKo') {
        const { skill } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
    }

    if (type === 'Damage') {
        const { skill, amount, mitigation, colour } = event;
        const mitigationText = mitigation
            ? `(${mitigation})`
            : '';
        if (startSkill && source) return [`${skill}`, `${skill.toLowerCase()}-cast`];
        if (endSkill && target) return [`${skill}`, `${skill.toLowerCase()}-hit`];
        if (postSkill && target) return [`${amount} ${mitigationText}`, ''];
    }

    if (type === 'Healing') {
        const { skill, amount, overhealing } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return [`${amount} (${overhealing} OH)`, ''];
    }

    if (type === 'Inversion') {
        const { skill } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return ['INVERT', ''];
    }

    if (type === 'Reflection') {
        const { skill } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return ['REFLECT', ''];
    }

    if (type === 'Effect') {
        const { skill, effect, duration } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return [`+ ${effect} ${duration}T`, ''];
    }

    if (type === 'Recharge') {
        const { skill, red, blue } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
        if (postSkill && target) return [`+${red}R ${blue}B`, ''];
    }

    if (type === 'Skill' || type === 'AoeSkill') {
        const { skill } = event;
        if (startSkill && source) return [`${skill}`, ''];
        if (endSkill && target) return [`${skill}`, ''];
    }

    if (type === 'Removal') {
        const { effect } = event;
        if (postSkill && target) return [`-${effect}`, ''];
    }


    return '';
}

function convertItem(v) {
    if (['Red', 'Green', 'Blue'].includes(v)) {
        return (
            shapes.vboxColour(v.toLowerCase())
        );
    }
    return v || <span>&nbsp;</span>;
    // uncomment for double borders in vbox;
    // if (v) {
    //     return <div>{v}</div>;
    // }
    // return;
}

const COLOURS = [
    '#a52a2a',
    '#1FF01F',
    '#3498db',
];

module.exports = {
    animateConstruct,
    stringSort,
    convertItem,
    numSort,
    genAvatar,
    ConstructAvatar,
    instanceConstruct,
    requestAvatar,
    eventClasses,
    getCombatSequence,
    getCombatText,
    resoConstructHealth,
    NULL_UUID,
    STATS,
    COLOURS,
};