"use strict";
const os = require('os');
const gulp = require('gulp');
const gutil = require('gulp-util');
const col = gutil.colors;
const download = require('./download');
const unzip = require('gulp-unzip');
const gunzip = require('gulp-gunzip');
const untar = require('gulp-untar');
const Promise = require('bluebird');
const ProgressBar = require('progress');

class Sdk {
    static set dir(value) {
        Sdk._dir = value
    }

    static get dir() {
        return Sdk._dir || `${os.homedir()}/sdk`;
    }

    static path(name, version) {
        return `${this.dir}/${name}/${version}`;
    }

    constructor(name, version) {
        this.name = name;
        this.tag = col.green(`[${name}]`);
        this.version = version;
        this.path = Sdk.path(name, version);
    }

    get intVersion() {
        const vArr = this.version.split('\.').reverse();
        let m = 1;
        let r = 0;
        for (let v of vArr) {
            r += parseInt(v) * m;
            m *= 10;
        }
        return r;
    }

    get prepared() {
        throw "Not implemented";
    }

    get link() {
        throw "Not implemented";
    }

    prepare() {
        gutil.log(this.tag, `version: ${col.magenta(this.version)}`);
        return new Promise((success, fail) => {
            if (this.prepared) {
                success();
            } else {
                const bar = new ProgressBar(`${this.tag} [:bar] :percent :etas`, {width: 40, total: 1000, clear: true});
                let stream = download(this.link)
                    .on('error', fail)
                    .on('progress', (p) => bar.update(p.percent))
                    .on('end', () => bar.update(1));
                if (this.link.endsWith('.zip')) {
                    stream = stream.pipe(unzip());
                } else if (this.link.endsWith('tar.gz')) {
                    stream = stream.pipe(gunzip()).pipe(untar())
                }
                return stream
                    .pipe(gulp.dest(this.path))
                    .on('end', success)
                    .on('error', fail);
            }
        });
    }
}

module.exports = Sdk;