'use strict';

const Promise = require("bluebird");
const isoParser = require("../lib/iso9660");
const yargs = require("yargs");

const fsSeekable = require("../lib/seekable/fs");
const httpSeekable = require("../lib/seekable/http");
const renderVolumeTable = require("../lib/render/volume-table");
const renderFilesystemTree = require("../lib/render/filesystem-tree");

let argv = yargs.argv;
let command, target, subCommands;

if (argv._.length === 1) {
    command = "volumes";
    target = argv._[0];
} else if (argv._.length > 1) {
    [command, target, ...subCommands] = argv._;
} else {
    throw new Error("You must specify at least a target file or URL");
}

Promise.try(() => {
    if (target.match(/^https?:\/\//)) {
        return httpSeekable(target);
    } else {
        return fsSeekable(target);
    }
}).then((seekable) => {
    let parser = isoParser(seekable);

    if (command === "volumes") {
        return Promise.try(() => {
            return parser.getUniqueVolumeDescriptors();
        }).then((volumeDescriptors) => {
            console.log(renderVolumeTable(volumeDescriptors));
        });
    } else if (command === "tree") {
        return Promise.try(() => {
            if (argv.volume != null) {
                let volumeId = parseInt(argv.volume);

                if (isNaN(volumeId)) {
                    throw new Error("--volume argument must be numeric");
                }

                return parser.getRootDirectory(volumeId);
            } else {
                return parser.getRootDirectory();
            }
        }).then((rootDirectory) => {
            return rootDirectory.getTree();
        }).then((tree) => {
            console.log(renderFilesystemTree(tree));
        })
    }
});