'use strict';

/* global CloudCmd */

const {eachSeries} = require('execon');
const wraptile = require('wraptile/legacy');

const DOM = require('.');
const load = require('./load');
const Images = require('./images');
const {alert} = require('./dialog');

const {FS} = require('../../common/cloudfunc');

const {TITLE} = CloudCmd;

const onEnd = wraptile(_onEnd);
const loadFile = wraptile(_loadFile);

const {
    getCurrentDirPath: getPathWhenRootEmpty
} = DOM;

module.exports = (dir, files) => {
    if (!files) {
        files = dir;
        dir = getPathWhenRootEmpty();
    }
    
    const n = files.length;
    
    if (!n)
        return;
    
    const array = [...files];
    const {name} = files[0];
    
    eachSeries(array, loadFile(dir, n), onEnd(name));
};

function _onEnd(currentName) {
    CloudCmd.refresh({
        currentName
    });
}

function _loadFile(dir, n, file, callback) {
    let i = 0;
    
    const name = file.name;
    const path = dir + name;
    const {PREFIX_URL} = CloudCmd;
    const api = PREFIX_URL + FS;
    
    const percent = (i, n, per = 100) => {
        return Math.round(i * per / n);
    };
    
    const step = (n) => 100 / n;
    
    ++i;
    
    load.put(api + path, file)
        .on('error', showError)
        .on('end', callback)
        .on('progress', (count) => {
            const max = step(n);
            const value = (i - 1) * max + percent(count, 100, max);
            
            Images.show.load('top');
            Images.setProgress(Math.round(value));
        });
}

function showError({message}) {
    alert(TITLE, message);
}