/**
 * Copyright © 2016-2018 The Thingsboard Authors
 *
 * Licensed 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 "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.server.service.security.permission;

import org.springframework.stereotype.Component;
import org.thingsboard.server.common.data.*;
import org.thingsboard.server.common.data.id.DashboardId;
import org.thingsboard.server.common.data.id.EntityId;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.common.data.id.UserId;
import org.thingsboard.server.common.data.security.Authority;
import org.thingsboard.server.service.security.model.SecurityUser;

import java.util.HashMap;

@Component(value="customerUserPermissions")
public class CustomerUserPremissions extends AbstractPermissions {

    public CustomerUserPremissions() {
        super();
        put(Resource.ALARM, TenantAdminPermissions.tenantEntityPermissionChecker);
        put(Resource.ASSET, customerEntityPermissionChecker);
        put(Resource.DEVICE, customerEntityPermissionChecker);
        put(Resource.CUSTOMER, customerPermissionChecker);
        put(Resource.DASHBOARD, customerDashboardPermissionChecker);
        put(Resource.ENTITY_VIEW, customerEntityPermissionChecker);
        put(Resource.USER, userPermissionChecker);
        put(Resource.WIDGETS_BUNDLE, widgetsPermissionChecker);
        put(Resource.WIDGET_TYPE, widgetsPermissionChecker);
    }

    private static final PermissionChecker customerEntityPermissionChecker =
            new PermissionChecker.GenericPermissionChecker(Operation.READ, Operation.READ_CREDENTIALS, Operation.READ_ATTRIBUTES, Operation.READ_TELEMETRY) {

        @Override
        public boolean hasPermission(SecurityUser user, Operation operation, EntityId entityId, HasTenantId entity) {

            if (!super.hasPermission(user, operation, entityId, entity)) {
                return false;
            }
            if (!user.getTenantId().equals(entity.getTenantId())) {
                return false;
            }
            if (!(entity instanceof HasCustomerId)) {
                return false;
            }
            if (!user.getCustomerId().equals(((HasCustomerId)entity).getCustomerId())) {
                return false;
            }
            return true;
        }
    };

    private static final PermissionChecker customerPermissionChecker =
            new PermissionChecker.GenericPermissionChecker(Operation.READ, Operation.READ_ATTRIBUTES, Operation.READ_TELEMETRY) {

                @Override
                public boolean hasPermission(SecurityUser user, Operation operation, EntityId entityId, HasTenantId entity) {
                    if (!super.hasPermission(user, operation, entityId, entity)) {
                        return false;
                    }
                    if (!user.getCustomerId().equals(entityId)) {
                        return false;
                    }
                    return true;
                }

            };

    private static final PermissionChecker customerDashboardPermissionChecker =
            new PermissionChecker.GenericPermissionChecker<DashboardId, DashboardInfo>(Operation.READ, Operation.READ_ATTRIBUTES, Operation.READ_TELEMETRY) {

                @Override
                public boolean hasPermission(SecurityUser user, Operation operation, DashboardId dashboardId, DashboardInfo dashboard) {

                    if (!super.hasPermission(user, operation, dashboardId, dashboard)) {
                        return false;
                    }
                    if (!user.getTenantId().equals(dashboard.getTenantId())) {
                        return false;
                    }
                    if (!dashboard.isAssignedToCustomer(user.getCustomerId())) {
                        return false;
                    }
                    return true;
                }

            };

    private static final PermissionChecker userPermissionChecker = new PermissionChecker<UserId, User>() {

        @Override
        public boolean hasPermission(SecurityUser user, Operation operation, UserId userId, User userEntity) {
            if (userEntity.getAuthority() != Authority.CUSTOMER_USER) {
                return false;
            }
            if (!user.getId().equals(userId)) {
                return false;
            }
            return true;
        }

    };

    private static final PermissionChecker widgetsPermissionChecker = new PermissionChecker.GenericPermissionChecker(Operation.READ) {

        @Override
        public boolean hasPermission(SecurityUser user, Operation operation, EntityId entityId, HasTenantId entity) {
            if (!super.hasPermission(user, operation, entityId, entity)) {
                return false;
            }
            if (entity.getTenantId() == null || entity.getTenantId().isNullUid()) {
                return true;
            }
            if (!user.getTenantId().equals(entity.getTenantId())) {
                return false;
            }
            return true;
        }

    };
}
