/**
 *  Copyright (C) 2010 Cloud.com, Inc.  All rights reserved.
 * 
 * This software is licensed under the GNU General Public License v3 or later.
 * 
 * It is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package com.cloud.api.commands;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;

import com.cloud.api.BaseCmd;
import com.cloud.api.ServerApiException;
import com.cloud.exception.InternalErrorException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.user.Account;
import com.cloud.utils.Pair;
import com.cloud.vm.UserVmVO;

public class RecoverVMCmd extends BaseCmd {
    public static final Logger s_logger = Logger.getLogger(RecoverVMCmd.class.getName());

    private static final String s_name = "recovervirtualmachineresponse";
    private static final List<Pair<Enum, Boolean>> s_properties = new ArrayList<Pair<Enum, Boolean>>();

    static {
        s_properties.add(new Pair<Enum, Boolean>(BaseCmd.Properties.ID, Boolean.TRUE));
        s_properties.add(new Pair<Enum, Boolean>(BaseCmd.Properties.ACCOUNT_OBJ, Boolean.FALSE));
    }

    public String getName() {
        return s_name;
    }

    public List<Pair<Enum, Boolean>> getProperties() {
        return s_properties;
    }

    @Override
    public List<Pair<String, Object>> execute(Map<String, Object> params) {
        Long vmId = (Long)params.get(BaseCmd.Properties.ID.getName());
        Account account = (Account)params.get(BaseCmd.Properties.ACCOUNT_OBJ.getName());
   
        //if account is removed, return error
        if(account!=null && account.getRemoved() != null)
        	throw new ServerApiException(BaseCmd.ACCOUNT_ERROR, "The account " + account.getId()+" is removed");
        	
        // Verify input parameters
        UserVmVO vmInstance = getManagementServer().findUserVMInstanceById(vmId.longValue());
        if (vmInstance == null) {
        	throw new ServerApiException(BaseCmd.VM_INVALID_PARAM_ERROR, "unable to find a virtual machine with id " + vmId);
        }

        if ((account != null) && !getManagementServer().isChildDomain(account.getDomainId(), vmInstance.getDomainId())) {
            // the domain in which the VM lives is not in the admin's domain tree
            throw new ServerApiException(BaseCmd.PARAM_ERROR, "Unable to recover virtual machine with id " + vmId + ", invalid id given.");
        }

        try {
            boolean success = getManagementServer().recoverVirtualMachine(vmId.longValue());
            if (success == false) {
                throw new ServerApiException(BaseCmd.VM_RECOVER_ERROR, "unable to recover virtual machine with id " + vmId.toString());
            }
            List<Pair<String, Object>> returnValues = new ArrayList<Pair<String, Object>>();
            returnValues.add(new Pair<String, Object>(BaseCmd.Properties.SUCCESS.getName(), Boolean.valueOf(success).toString()));
            return returnValues;
        } catch (ResourceAllocationException ex) {
            throw new ServerApiException(BaseCmd.VM_RECOVER_ERROR, "Failed to recover virtual machine with id " + vmId + "; " + ex.getMessage());
        } catch (InternalErrorException e) {
        	throw new ServerApiException(BaseCmd.VM_RECOVER_ERROR, "Failed to recover virtual machine with id " + vmId + "; " + e.getMessage());
		}
    }
}