/**
 * Copyright © 2016-2017 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.controller;

import org.springframework.http.HttpStatus;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;
import org.thingsboard.server.common.data.Dashboard;
import org.thingsboard.server.common.data.id.CustomerId;
import org.thingsboard.server.common.data.id.DashboardId;
import org.thingsboard.server.common.data.id.TenantId;
import org.thingsboard.server.common.data.page.TextPageData;
import org.thingsboard.server.common.data.page.TextPageLink;
import org.thingsboard.server.dao.exception.IncorrectParameterException;
import org.thingsboard.server.dao.model.ModelConstants;
import org.thingsboard.server.exception.ThingsboardException;

@RestController
@RequestMapping("/api")
public class DashboardController extends BaseController {

    @PreAuthorize("hasAnyAuthority('SYS_ADMIN', 'TENANT_ADMIN', 'CUSTOMER_USER')")
    @RequestMapping(value = "/dashboard/serverTime", method = RequestMethod.GET)
    @ResponseBody
    public long getServerTime() throws ThingsboardException {
        return System.currentTimeMillis();
    }

    @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
    @RequestMapping(value = "/dashboard/{dashboardId}", method = RequestMethod.GET)
    @ResponseBody
    public Dashboard getDashboardById(@PathVariable("dashboardId") String strDashboardId) throws ThingsboardException {
        checkParameter("dashboardId", strDashboardId);
        try {
            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
            return checkDashboardId(dashboardId);
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAuthority('TENANT_ADMIN')")
    @RequestMapping(value = "/dashboard", method = RequestMethod.POST)
    @ResponseBody 
    public Dashboard saveDashboard(@RequestBody Dashboard dashboard) throws ThingsboardException {
        try {
            dashboard.setTenantId(getCurrentUser().getTenantId());
            return checkNotNull(dashboardService.saveDashboard(dashboard));
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAuthority('TENANT_ADMIN')")
    @RequestMapping(value = "/dashboard/{dashboardId}", method = RequestMethod.DELETE)
    @ResponseStatus(value = HttpStatus.OK)
    public void deleteDashboard(@PathVariable("dashboardId") String strDashboardId) throws ThingsboardException {
        checkParameter("dashboardId", strDashboardId);
        try {
            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
            checkDashboardId(dashboardId);
            dashboardService.deleteDashboard(dashboardId);
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAuthority('TENANT_ADMIN')")
    @RequestMapping(value = "/customer/{customerId}/dashboard/{dashboardId}", method = RequestMethod.POST)
    @ResponseBody 
    public Dashboard assignDashboardToCustomer(@PathVariable("customerId") String strCustomerId,
                                         @PathVariable("dashboardId") String strDashboardId) throws ThingsboardException {
        checkParameter("customerId", strCustomerId);
        checkParameter("dashboardId", strDashboardId);
        try {
            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
            checkCustomerId(customerId);

            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
            checkDashboardId(dashboardId);
            
            return checkNotNull(dashboardService.assignDashboardToCustomer(dashboardId, customerId));
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAuthority('TENANT_ADMIN')")
    @RequestMapping(value = "/customer/dashboard/{dashboardId}", method = RequestMethod.DELETE)
    @ResponseBody 
    public Dashboard unassignDashboardFromCustomer(@PathVariable("dashboardId") String strDashboardId) throws ThingsboardException {
        checkParameter("dashboardId", strDashboardId);
        try {
            DashboardId dashboardId = new DashboardId(toUUID(strDashboardId));
            Dashboard dashboard = checkDashboardId(dashboardId);
            if (dashboard.getCustomerId() == null || dashboard.getCustomerId().getId().equals(ModelConstants.NULL_UUID)) {
                throw new IncorrectParameterException("Dashboard isn't assigned to any customer!");
            }
            return checkNotNull(dashboardService.unassignDashboardFromCustomer(dashboardId));
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAuthority('TENANT_ADMIN')")
    @RequestMapping(value = "/tenant/dashboards", params = { "limit" }, method = RequestMethod.GET)
    @ResponseBody
    public TextPageData<Dashboard> getTenantDashboards(
            @RequestParam int limit,
            @RequestParam(required = false) String textSearch,
            @RequestParam(required = false) String idOffset,
            @RequestParam(required = false) String textOffset) throws ThingsboardException {
        try {
            TenantId tenantId = getCurrentUser().getTenantId();
            TextPageLink pageLink = createPageLink(limit, textSearch, idOffset, textOffset);
            return checkNotNull(dashboardService.findDashboardsByTenantId(tenantId, pageLink));
        } catch (Exception e) {
            throw handleException(e);
        }
    }

    @PreAuthorize("hasAnyAuthority('TENANT_ADMIN', 'CUSTOMER_USER')")
    @RequestMapping(value = "/customer/{customerId}/dashboards", params = { "limit" }, method = RequestMethod.GET)
    @ResponseBody
    public TextPageData<Dashboard> getCustomerDashboards(
            @PathVariable("customerId") String strCustomerId,
            @RequestParam int limit,
            @RequestParam(required = false) String textSearch,
            @RequestParam(required = false) String idOffset,
            @RequestParam(required = false) String textOffset) throws ThingsboardException {
        checkParameter("customerId", strCustomerId);
        try {
            TenantId tenantId = getCurrentUser().getTenantId();
            CustomerId customerId = new CustomerId(toUUID(strCustomerId));
            checkCustomerId(customerId);
            TextPageLink pageLink = createPageLink(limit, textSearch, idOffset, textOffset);
            return checkNotNull(dashboardService.findDashboardsByTenantIdAndCustomerId(tenantId, customerId, pageLink));
        } catch (Exception e) {
            throw handleException(e);
        }
    }
}
