'use strict';

const imapTools = require('../imap-tools');

module.exports = {
    state: 'Selected',

    schema: [
        {
            name: 'range',
            type: 'sequence'
        },
        {
            name: 'mailbox',
            type: 'string'
        }
    ],

    handler(command, callback) {
        let cmd = (command.command || '').toString().toUpperCase();

        // Check if COPY method is set
        if (typeof this._server.onCopy !== 'function') {
            return callback(null, {
                response: 'NO',
                message: cmd + ' not implemented'
            });
        }

        let range = (command.attributes[0] && command.attributes[0].value) || '';
        let path = Buffer.from((command.attributes[1] && command.attributes[1].value) || '', 'binary').toString();
        let mailbox = imapTools.normalizeMailbox(path, !this.acceptUTF8Enabled);

        if (!mailbox) {
            return callback(new Error('Invalid mailbox argument for ' + cmd));
        }

        if (!imapTools.validateSequnce(range)) {
            return callback(new Error('Invalid sequence set for ' + cmd));
        }

        let messages = imapTools.getMessageRange(this.selected.uidList, range, cmd === 'UID COPY');

        this._server.onCopy(
            this.selected.mailbox,
            {
                destination: mailbox,
                messages
            },
            this.session,
            (err, success, info) => {
                if (err) {
                    return callback(err);
                }

                let code = typeof success === 'string'
                    ? success.toUpperCase()
                    : 'COPYUID ' + info.uidValidity + ' ' + imapTools.packMessageRange(info.sourceUid) + ' ' + imapTools.packMessageRange(info.destinationUid);

                callback(null, {
                    response: success === true ? 'OK' : 'NO',
                    code
                });
            }
        );
    }
};