/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/*
 * Copyright 2017 Joyent, Inc.
 *
 * `triton image export ...`
 */

var assert = require('assert-plus');
var format = require('util').format;
var vasync = require('vasync');

var common = require('../common');
var errors = require('../errors');

// ---- the command

function do_export(subcmd, opts, args, cb) {
    if (opts.help) {
        this.do_help('help', {}, [subcmd], cb);
        return;
    } else if (args.length !== 2) {
        cb(new errors.UsageError(
            'incorrect number of args: expect 2, got ' + args.length));
        return;
    }

    var log = this.top.log;
    var tritonapi = this.top.tritonapi;

    vasync.pipeline({arg: {cli: this.top}, funcs: [
        common.cliSetupTritonApi,
        function exportImage(ctx, next) {
            log.trace({dryRun: opts.dry_run, manta_path: ctx.manta_path},
                'image export path');

            console.log('Exporting image %s to %s', args[0], args[1]);

            if (opts.dry_run) {
                next();
                return;
            }

            tritonapi.exportImage({
                image: args[0],
                manta_path: args[1]
            }, function (err, exportInfo) {
                if (err) {
                    next(new errors.TritonError(err,
                        'error exporting image to manta'));
                    return;
                }

                log.trace({exportInfo: exportInfo}, 'image export: exportInfo');
                ctx.exportInfo = exportInfo;
                next();
            });
        },
        function outputResults(ctx, next) {
            if (opts.json) {
                console.log(JSON.stringify(ctx.exportInfo));
            } else {
                console.log('    Manta URL: %s', ctx.exportInfo.manta_url);
                console.log('Manifest path: %s', ctx.exportInfo.manifest_path);
                console.log('   Image path: %s', ctx.exportInfo.image_path);
            }
            next();
        }
    ]}, function (err) {
        cb(err);
    });
}

do_export.options = [
    {
        names: ['help', 'h'],
        type: 'bool',
        help: 'Show this help.'
    },
    {
        group: 'Other options'
    },
    {
        names: ['dry-run'],
        type: 'bool',
        help: 'Go through the motions without actually exporting.'
    },
    {
        names: ['json', 'j'],
        type: 'bool',
        help: 'JSON stream output.'
    }
];

do_export.synopses = [
    '{{name}} {{cmd}} [OPTIONS] IMAGE MANTA_PATH'
];

do_export.help = [
    /* BEGIN JSSTYLED */
    'Export an image.',
    '',
    '{{usage}}',
    '',
    '{{options}}',
    'Where "IMAGE" is an image id (a full UUID), an image name (selects the',
    'latest, by "published_at", image with that name), an image "name@version"',
    '(selects latest match by "published_at"), or an image short ID (ID prefix).',
    '',
    'Note: Only images that are owned by the account can be exported.'
    /* END JSSTYLED */
].join('\n');

do_export.completionArgtypes = ['tritonimage', 'none'];

module.exports = do_export;