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// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
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// specific language governing permissions and limitations
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package org.apache.cloudstack.api.command.admin.acl;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.cloudstack.acl.Role;
import org.apache.cloudstack.acl.RoleType;
import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.ApiConstants;
import org.apache.cloudstack.api.BaseListCmd;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.response.ListResponse;
import org.apache.cloudstack.api.response.RoleResponse;
import org.apache.commons.lang3.StringUtils;

import com.cloud.user.Account;
import com.cloud.utils.Pair;
import com.google.common.base.Strings;

@APICommand(name = ListRolesCmd.APINAME, description = "Lists dynamic roles in CloudStack", responseObject = RoleResponse.class, requestHasSensitiveInfo = false, responseHasSensitiveInfo = false, since = "4.9.0", authorized = {
        RoleType.Admin, RoleType.ResourceAdmin, RoleType.DomainAdmin })
public class ListRolesCmd extends BaseListCmd {
    public static final String APINAME = "listRoles";

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

    @Parameter(name = ApiConstants.ID, type = CommandType.UUID, entityType = RoleResponse.class, description = "List role by role ID.")
    private Long id;

    @Parameter(name = ApiConstants.NAME, type = CommandType.STRING, description = "List role by role name.")
    private String roleName;

    @Parameter(name = ApiConstants.TYPE, type = CommandType.STRING, description = "List role by role type, valid options are: Admin, ResourceAdmin, DomainAdmin, User.")
    private String roleType;

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

    public Long getId() {
        return id;
    }

    public String getName() {
        return roleName;
    }

    public RoleType getRoleType() {
        if (!Strings.isNullOrEmpty(roleType)) {
            return RoleType.valueOf(roleType);
        }
        return null;
    }

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

    @Override
    public String getCommandName() {
        return APINAME.toLowerCase() + BaseListCmd.RESPONSE_SUFFIX;
    }

    @Override
    public long getEntityOwnerId() {
        return Account.ACCOUNT_ID_SYSTEM;
    }

    private void setupResponse(final Pair<List<Role>, Integer> roles) {
        final ListResponse<RoleResponse> response = new ListResponse<>();
        final List<RoleResponse> roleResponses = new ArrayList<>();
        for (final Role role : roles.first()) {
            if (role == null) {
                continue;
            }
            final RoleResponse roleResponse = new RoleResponse();
            roleResponse.setId(role.getUuid());
            roleResponse.setRoleName(role.getName());
            roleResponse.setRoleType(role.getRoleType());
            roleResponse.setDescription(role.getDescription());
            roleResponse.setObjectName("role");
            roleResponses.add(roleResponse);
        }
        response.setResponses(roleResponses, roles.second());
        response.setResponseName(getCommandName());
        setResponseObject(response);
    }

    @Override
    public void execute() {
        Pair<List<Role>, Integer> roles;
        if (getId() != null && getId() > 0L) {
            roles = new Pair<List<Role>, Integer>(Collections.singletonList(roleService.findRole(getId())), 1);
        } else if (StringUtils.isNotBlank(getName())) {
            roles = roleService.findRolesByName(getName(), getStartIndex(), getPageSizeVal());
        } else if (getRoleType() != null) {
            roles = roleService.findRolesByType(getRoleType(), getStartIndex(), getPageSizeVal());
        } else {
            roles = roleService.listRoles(getStartIndex(), getPageSizeVal());
        }
        setupResponse(roles);
    }
}
