/*
 * 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 2016 Joyent, Inc.
 *
 * `triton instance tag delete ...`
 */

var vasync = require('vasync');

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


function do_delete(subcmd, opts, args, cb) {
    var self = this;
    if (opts.help) {
        this.do_help('help', {}, [subcmd], cb);
        return;
    } else if (args.length < 1) {
        cb(new errors.UsageError('incorrect number of args'));
        return;
    } else if (args.length > 1 && opts.all) {
        cb(new errors.UsageError('cannot specify both tag names and --all'));
        return;
    }
    var waitTimeoutMs = opts.wait_timeout * 1000; /* seconds to ms */

    if (opts.all) {
        self.top.tritonapi.deleteAllInstanceTags({
            id: args[0],
            wait: opts.wait,
            waitTimeout: waitTimeoutMs
        }, function (err) {
            console.log('Deleted all tags on instance %s', args[0]);
            cb(err);
        });
    } else {
        // Uniq'ify the given names.
        var names = {};
        args.slice(1).forEach(function (arg) { names[arg] = true; });
        names = Object.keys(names);

        // TODO: Instead of waiting for each delete, let's delete them all then
        // wait for the set.
        vasync.forEachPipeline({
            inputs: names,
            func: function deleteOne(name, next) {
                self.top.tritonapi.deleteInstanceTag({
                    id: args[0],
                    tag: name,
                    wait: opts.wait,
                    waitTimeout: waitTimeoutMs
                }, function (err) {
                    if (!err) {
                        console.log('Deleted tag %s on instance %s',
                            name, args[0]);
                    }
                    next(err);
                });
            }
        }, cb);
    }
}

do_delete.options = [
    {
        names: ['help', 'h'],
        type: 'bool',
        help: 'Show this help.'
    },
    {
        names: ['all', 'a'],
        type: 'bool',
        help: 'Remove all tags on this instance.'
    },
    {
        names: ['wait', 'w'],
        type: 'bool',
        help: 'Wait for the tag changes to be applied.'
    },
    {
        names: ['wait-timeout'],
        type: 'positiveInteger',
        default: 120,
        help: 'The number of seconds to wait before timing out with an error. '
            + 'The default is 120 seconds.'
    }
];

do_delete.help = [
    /* BEGIN JSSTYLED */
    'Delete one or more instance tags.',
    '',
    'Usage:',
    '     {{name}} delete <inst> [<name> ...]',
    '     {{name}} delete --all <inst>          # delete all tags',
    '',
    '{{options}}',
    'Where <inst> is an instance id, name, or shortid and <name> is a tag name.',
    '',
    'Changing instance tags is asynchronous. Use "--wait" to not return until',
    'the changes are completed.'
    /* END JSSTYLED */
].join('\n');

do_delete.aliases = ['rm'];

module.exports = do_delete;