import { Parser } from 'binary-parser';
import checkStatus from '../checkStatus';

const { error } = console;

const node = Parser.start()
    .skip(1)
    .int32le('nodeCount')
    .array('nodes', {
        type: Parser.start()
            .floatle('x')
            .floatle('y')
            .floatle('z'),
        length: 'nodeCount'
    });

const anim = Parser.start()
    .int32le('frameCount')
    .array('frames', {
        type: node,
        length: 'frameCount'
    })
    .skip(96);

export default class {
    constructor(path = 'gamedata/animations', ext = 'bin') {
        this._cachedBinary = null;
        this.path = path;
        this.ext = ext;
    }

    createCacheBinary() {
        if (!this._cachedBinary) this._cachedBinary = new Map();
        return true;
    }

    clearCachedBinary() {
        if (this._cachedBinary) {
            this._cachedBinary.Clear();
            this._cachedBinary = null;
        }
    }

    async readDataBinary(animName, useCache = true) {
        if (useCache && this.createCacheBinary() && this._cachedBinary.has(animName)) {
            return this._cachedBinary.get(animName);
        }
        try {
            const response = await fetch(`${this.path}/${animName}.${this.ext}`).then(
                resp => checkStatus(resp) && resp
            );
            const buffer = await response.arrayBuffer();
            const data = anim.parse(Buffer.from(buffer));
            if (useCache) this._cachedBinary.set(animName, data);
            return data;
        } catch (err) {
            error(err);
        }
        return false;
    }
}