#!/usr/bin/env node

// requirements
const os = require('os');
const path = require('path');
const async = require('async');
const commander = require('commander');
const app = require('./package.json');
const audio = require('./lib/audio');
const util = require('./lib/util');
const cli = require('./lib/cli');

// generate timestamp
const start = process.hrtime();

badger();

// "main"
function badger() {
    cli.printLogo();
    run();
}

// start from command lines
function run() {
    // general options
    commander
        .version(app.version)
        .usage('[options] <command>')
        .option('-c, --concurrency <n>', 'specify concurrency level', os.cpus().length);
    // conversion
    commander
        .command('convert <input> <output>')
        .description('convert .flac to .mp3 files')
        .option('-b, --bitrate <n>', 'specify conversion bitrate', 320)
        .action(convert);
    // sort
    commander
        .command('sort <input> <output>')
        .description('sort audio files by tags')
        .option('-f, --format <type>', 'specify audio format (\'flac\', \'mp3\')', '.flac')
        .action(sort);
    // artwork
    commander
        .command('artwork <input>')
        .description('extract cover artwork')
        .option('-f, --format <type>', 'specify audio format (\'flac\', \'mp3\')', '.flac')
        .action(artwork);
    // parse command line arguments
    commander.parse(process.argv);
}

// convert files
function convert(input, output, options) {
    audio.batchConvert({
        input: path.normalize(input),
        output: path.normalize(output),
        concurrency: commander.concurrency || os.cpus().length,
        bitrate: options.bitrate || 320,
        format: options.format || '.flac'
    }, function (err) {
        cli.exit(err);
    });
}

// sort files
function sort(input, output, options) {
    util.batchSort({
        input: path.normalize(input),
        output: path.normalize(output),
        concurrency: commander.concurrency || os.cpus().length,
        bitrate: options.bitrate || 320,
        format: options.format || '.flac'
    }, function (err) {
        cli.exit(err);
    });
}

// extract artwork
function artwork(input, options) {
    audio.batchArtwork({
        input: path.normalize(input),
        concurrency: commander.concurrency || os.cpus().length,
        format: options.format || '.flac'
    }, function (err) {
        cli.exit(err);
    });
}