/*
 * Copyright (c) 2014 EMC Corporation
 * All Rights Reserved
 */

package com.emc.storageos.datadomain.restapi;

import com.emc.storageos.datadomain.restapi.errorhandling.DataDomainApiException;

/**
 * Created by zeldib on 2/4/14.
 * 
 * Utility to parse export options for the DataDomain NFS system:
 * 
 * <options> ::= <option> ' ' <options> ;
 * 
 * <option> ::= ro | rw |
 * root_squash | no_root_squash |
 * all_squash | no_all_squash |
 * secure | insecure |
 * anonuid=<N> | anongid=<N>
 * ;
 * Using the space to separate the option.
 * For example
 * <options>
 * rw no_root_squash no_all_squash secure
 * <option
 * 
 */

public class DDOptionInfo {

    public String permission;
    public String security;
    public String rootMapping;
    public String userMapping;
    public String anonUid;
    public String anonGid;
    public boolean secureConnection;

    static public DDOptionInfo parseOptions(String options) throws DataDomainApiException {
        DDOptionInfo info = new DDOptionInfo();
        String optionArr[] = options.split("[ \b]+");
        info.secureConnection = false;
        info.security = DataDomainApiConstants.DEFAULT_SECURITY;
        for (String option : optionArr) {
            switch (option) {
                case DataDomainApiConstants.PERMISSION_RO: {
                    info.permission = DataDomainApiConstants.PERMISSION_RO;
                    break;
                }
                case DataDomainApiConstants.PERMISSION_RW: {
                    info.permission = DataDomainApiConstants.PERMISSION_RW;
                    break;
                }
                case DataDomainApiConstants.ROOT_SQUASH: {
                    info.rootMapping = DataDomainApiConstants.ROOT_SQUASH;
                    break;
                }
                case DataDomainApiConstants.NO_ROOT_SQUASH: {
                    info.rootMapping = DataDomainApiConstants.NO_ROOT_SQUASH;
                    break;
                }
                case DataDomainApiConstants.ALL_SQUASH: {
                    info.userMapping = DataDomainApiConstants.ALL_SQUASH;
                    break;
                }
                case DataDomainApiConstants.NO_ALL_SQUASH: {
                    info.userMapping = DataDomainApiConstants.NO_ALL_SQUASH;
                    break;
                }
                case DataDomainApiConstants.SECURE: {
                    info.secureConnection = true;
                    break;
                }
                default: {
                    if (option.startsWith(DataDomainApiConstants.ANONYMOUS_UID)) {
                        String[] tokens = option.split("=");
                        if (tokens.length == 3) {
                            info.anonUid = tokens[2];
                        }
                        else {
                            throw DataDomainApiException.exceptions.failedProcessExportOption(option);
                        }
                    }
                    else if (option.startsWith(DataDomainApiConstants.ANONYMOUS_GID)) {
                        String[] tokens = option.split("=");
                        if (tokens.length == 3) {
                            info.anonGid = tokens[2];
                        }
                        else {
                            throw DataDomainApiException.exceptions.failedProcessExportOption(option);
                        }
                    } else if (option.startsWith(DataDomainApiConstants.SECURITY_TYPE_OPTION)) {
                        info.security = option.substring(DataDomainApiConstants.SECURITY_TYPE_OPTION.length());
                    }
                    else {
                        throw DataDomainApiException.exceptions.failedProcessExportOption(option);
                    }
                }
            }

        }
        return info;
    }
}