/**
 *  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.Parameter;
import com.cloud.api.ServerApiException;
import com.cloud.storage.VMTemplateVO;
import com.cloud.user.Account;
import com.cloud.utils.Pair;

public class DeleteTemplateCmd extends BaseCmd {
	public static final Logger s_logger = Logger.getLogger(DeleteTemplateCmd.class.getName());
    private static final String s_name = "deletetemplateresponse";
    private static final List<Pair<Enum, Boolean>> s_properties = new ArrayList<Pair<Enum, Boolean>>();

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

    /////////////////////////////////////////////////////
    //////////////// API parameters /////////////////////
    /////////////////////////////////////////////////////

    @Parameter(name="id", type=CommandType.LONG, required=true)
    private Long id;

    @Parameter(name="zoneid", type=CommandType.LONG)
    private Long zoneId;


    /////////////////////////////////////////////////////
    /////////////////// Accessors ///////////////////////
    /////////////////////////////////////////////////////

    public Long getId() {
        return id;
    }

    public Long getZoneId() {
        return zoneId;
    }


    /////////////////////////////////////////////////////
    /////////////// API Implementation///////////////////
    /////////////////////////////////////////////////////

    @Override
    public String getName() {
        return s_name;
    }
    
    public static String getStaticName() {
        return s_name;
    }
    
    @Override
    public List<Pair<Enum, Boolean>> getProperties() {
        return s_properties;
    }

    @Override
    public List<Pair<String, Object>> execute(Map<String, Object> params) {
        Long templateId = (Long)params.get(BaseCmd.Properties.ID.getName());
        Long userId = (Long)params.get(BaseCmd.Properties.USER_ID.getName());
        Account account = (Account)params.get(BaseCmd.Properties.ACCOUNT_OBJ.getName());
        Long zoneId = (Long)params.get(BaseCmd.Properties.ZONE_ID.getName());
        
        if (userId == null) {
            userId = Long.valueOf(1);
        }

        VMTemplateVO template = getManagementServer().findTemplateById(templateId.longValue());
        if (template == null) {
            throw new ServerApiException(BaseCmd.PARAM_ERROR, "unable to find template with id " + templateId);
        }

        if (account != null) {
            if (!isAdmin(account.getType())) {
                if (template.getAccountId() != account.getId()) {
                    throw new ServerApiException(BaseCmd.ACCOUNT_ERROR, "unable to delete template with id " + templateId);
                }
            } else {
                Account templateOwner = getManagementServer().findAccountById(template.getAccountId());
                if ((templateOwner == null) || !getManagementServer().isChildDomain(account.getDomainId(), templateOwner.getDomainId())) {
                    throw new ServerApiException(BaseCmd.ACCOUNT_ERROR, "Unable to delete template with id " + templateId + ", permission denied.");
                }
            }
        }
        
        try {
    		long jobId = getManagementServer().deleteTemplateAsync(userId, templateId, zoneId);
    		
    		if (jobId == 0) {
            	s_logger.warn("Unable to schedule async-job for DeleteTemplate command");
            } else {
    	        if(s_logger.isDebugEnabled()) {
    	        	s_logger.debug("DeleteTemplate command has been accepted, job id: " + jobId);
    	        }
            }
    		
    		List<Pair<String, Object>> returnValues = new ArrayList<Pair<String, Object>>();
            returnValues.add(new Pair<String, Object>(BaseCmd.Properties.JOB_ID.getName(), Long.valueOf(jobId))); 
            returnValues.add(new Pair<String, Object>(BaseCmd.Properties.TEMPLATE_ID.getName(), Long.valueOf(templateId))); 
            
            return returnValues;
    	} catch (Exception ex) {
    		throw new ServerApiException(BaseCmd.INTERNAL_ERROR, "Failed to delete template: " + ex.getMessage());
    	}

    }
}