/**
 * 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 static org.hamcrest.Matchers.containsString;
import static org.thingsboard.server.dao.model.ModelConstants.NULL_UUID;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

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

import org.apache.commons.lang3.RandomStringUtils;
import org.thingsboard.server.common.data.Customer;
import org.thingsboard.server.common.data.Device;
import org.thingsboard.server.common.data.Tenant;
import org.thingsboard.server.common.data.User;
import org.thingsboard.server.common.data.id.CustomerId;
import org.thingsboard.server.common.data.id.DeviceCredentialsId;
import org.thingsboard.server.common.data.id.DeviceId;
import org.thingsboard.server.common.data.page.TextPageData;
import org.thingsboard.server.common.data.page.TextPageLink;
import org.thingsboard.server.common.data.security.Authority;
import org.thingsboard.server.common.data.security.DeviceCredentials;
import org.thingsboard.server.common.data.security.DeviceCredentialsType;
import org.thingsboard.server.dao.model.ModelConstants;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.datastax.driver.core.utils.UUIDs;
import com.fasterxml.jackson.core.type.TypeReference;

public class DeviceControllerTest extends AbstractControllerTest {
    
    private IdComparator<Device> idComparator = new IdComparator<>();
    
    private Tenant savedTenant;
    private User tenantAdmin;
    
    @Before
    public void beforeTest() throws Exception {
        loginSysAdmin();
        
        Tenant tenant = new Tenant();
        tenant.setTitle("My tenant");
        savedTenant = doPost("/api/tenant", tenant, Tenant.class);
        Assert.assertNotNull(savedTenant);
        
        tenantAdmin = new User();
        tenantAdmin.setAuthority(Authority.TENANT_ADMIN);
        tenantAdmin.setTenantId(savedTenant.getId());
        tenantAdmin.setEmail("tenant2@thingsboard.org");
        tenantAdmin.setFirstName("Joe");
        tenantAdmin.setLastName("Downs");
        
        tenantAdmin = createUserAndLogin(tenantAdmin, "testPassword1");
    }
    
    @After
    public void afterTest() throws Exception {
        loginSysAdmin();
        
        doDelete("/api/tenant/"+savedTenant.getId().getId().toString())
        .andExpect(status().isOk());
    }
    
    @Test
    public void testSaveDevice() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        
        Assert.assertNotNull(savedDevice);
        Assert.assertNotNull(savedDevice.getId());
        Assert.assertTrue(savedDevice.getCreatedTime() > 0);
        Assert.assertEquals(savedTenant.getId(), savedDevice.getTenantId());
        Assert.assertNotNull(savedDevice.getCustomerId());
        Assert.assertEquals(NULL_UUID, savedDevice.getCustomerId().getId());
        Assert.assertEquals(device.getName(), savedDevice.getName());
        
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class); 

        Assert.assertNotNull(deviceCredentials);
        Assert.assertNotNull(deviceCredentials.getId());
        Assert.assertEquals(savedDevice.getId(), deviceCredentials.getDeviceId());
        Assert.assertEquals(DeviceCredentialsType.ACCESS_TOKEN, deviceCredentials.getCredentialsType());
        Assert.assertNotNull(deviceCredentials.getCredentialsId());
        Assert.assertEquals(20, deviceCredentials.getCredentialsId().length());
        
        savedDevice.setName("My new device");
        doPost("/api/device", savedDevice, Device.class);
        
        Device foundDevice = doGet("/api/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertEquals(foundDevice.getName(), savedDevice.getName());
    }
    
    @Test
    public void testFindDeviceById() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        Device foundDevice = doGet("/api/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertNotNull(foundDevice);
        Assert.assertEquals(savedDevice, foundDevice);
    }
    
    @Test
    public void testDeleteDevice() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        
        doDelete("/api/device/"+savedDevice.getId().getId().toString())
        .andExpect(status().isOk());

        doGet("/api/device/"+savedDevice.getId().getId().toString())
        .andExpect(status().isNotFound());
    }
    
    @Test
    public void testSaveDeviceWithEmptyName() throws Exception {
        Device device = new Device();
        doPost("/api/device", device)
        .andExpect(status().isBadRequest())
        .andExpect(statusReason(containsString("Device name should be specified")));
    }
    
    @Test
    public void testAssignUnassignDeviceToCustomer() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        
        Customer customer = new Customer();
        customer.setTitle("My customer");
        Customer savedCustomer = doPost("/api/customer", customer, Customer.class);
        
        Device assignedDevice = doPost("/api/customer/" + savedCustomer.getId().getId().toString() 
                + "/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertEquals(savedCustomer.getId(), assignedDevice.getCustomerId());
        
        Device foundDevice = doGet("/api/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertEquals(savedCustomer.getId(), foundDevice.getCustomerId());

        Device unassignedDevice = 
                doDelete("/api/customer/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertEquals(ModelConstants.NULL_UUID, unassignedDevice.getCustomerId().getId());
        
        foundDevice = doGet("/api/device/" + savedDevice.getId().getId().toString(), Device.class);
        Assert.assertEquals(ModelConstants.NULL_UUID, foundDevice.getCustomerId().getId());
    }
    
    @Test
    public void testAssignDeviceToNonExistentCustomer() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        
        doPost("/api/customer/" + UUIDs.timeBased().toString() 
                + "/device/" + savedDevice.getId().getId().toString())
        .andExpect(status().isNotFound());
    }
    
    @Test
    public void testAssignDeviceToCustomerFromDifferentTenant() throws Exception {
        loginSysAdmin();
        
        Tenant tenant2 = new Tenant();
        tenant2.setTitle("Different tenant");
        Tenant savedTenant2 = doPost("/api/tenant", tenant2, Tenant.class);
        Assert.assertNotNull(savedTenant2);

        User tenantAdmin2 = new User();
        tenantAdmin2.setAuthority(Authority.TENANT_ADMIN);
        tenantAdmin2.setTenantId(savedTenant2.getId());
        tenantAdmin2.setEmail("tenant3@thingsboard.org");
        tenantAdmin2.setFirstName("Joe");
        tenantAdmin2.setLastName("Downs");
        
        tenantAdmin2 = createUserAndLogin(tenantAdmin2, "testPassword1");
        
        Customer customer = new Customer();
        customer.setTitle("Different customer");
        Customer savedCustomer = doPost("/api/customer", customer, Customer.class);

        login(tenantAdmin.getEmail(), "testPassword1");
        
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        
        doPost("/api/customer/" + savedCustomer.getId().getId().toString()
                + "/device/" + savedDevice.getId().getId().toString())
        .andExpect(status().isForbidden());
        
        loginSysAdmin();
        
        doDelete("/api/tenant/"+savedTenant2.getId().getId().toString())
        .andExpect(status().isOk());
    }
    
    @Test
    public void testFindDeviceCredentialsByDeviceId() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class); 
        Assert.assertEquals(savedDevice.getId(), deviceCredentials.getDeviceId());
    }
    
    @Test
    public void testSaveDeviceCredentials() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class); 
        Assert.assertEquals(savedDevice.getId(), deviceCredentials.getDeviceId());
        deviceCredentials.setCredentialsType(DeviceCredentialsType.ACCESS_TOKEN);
        deviceCredentials.setCredentialsId("access_token");
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isOk());
        
        DeviceCredentials foundDeviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        
        Assert.assertEquals(deviceCredentials, foundDeviceCredentials);
    }
    
    @Test
    public void testSaveDeviceCredentialsWithEmptyDevice() throws Exception {
        DeviceCredentials deviceCredentials = new DeviceCredentials();
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isBadRequest());
    }
    
    @Test
    public void testSaveDeviceCredentialsWithEmptyCredentialsType() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        deviceCredentials.setCredentialsType(null);
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isBadRequest())
        .andExpect(statusReason(containsString("Device credentials type should be specified")));
    }
    
    @Test
    public void testSaveDeviceCredentialsWithEmptyCredentialsId() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        deviceCredentials.setCredentialsId(null);
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isBadRequest())
        .andExpect(statusReason(containsString("Device credentials id should be specified")));
    }
    
    @Test
    public void testSaveNonExistentDeviceCredentials() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        DeviceCredentials newDeviceCredentials = new DeviceCredentials(new DeviceCredentialsId(UUIDs.timeBased()));
        newDeviceCredentials.setCreatedTime(deviceCredentials.getCreatedTime());
        newDeviceCredentials.setDeviceId(deviceCredentials.getDeviceId());
        newDeviceCredentials.setCredentialsType(deviceCredentials.getCredentialsType());
        newDeviceCredentials.setCredentialsId(deviceCredentials.getCredentialsId());
        doPost("/api/device/credentials", newDeviceCredentials)
        .andExpect(status().isBadRequest())
        .andExpect(statusReason(containsString("Unable to update non-existent device credentials")));
    }
    
    @Test
    public void testSaveDeviceCredentialsWithNonExistentDevice() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        deviceCredentials.setDeviceId(new DeviceId(UUIDs.timeBased()));
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isNotFound());
    }
    
    @Test
    public void testSaveDeviceCredentialsWithInvalidCredemtialsIdLength() throws Exception {
        Device device = new Device();
        device.setName("My device");
        Device savedDevice = doPost("/api/device", device, Device.class);
        DeviceCredentials deviceCredentials = 
                doGet("/api/device/" + savedDevice.getId().getId().toString() + "/credentials", DeviceCredentials.class);
        deviceCredentials.setCredentialsId(RandomStringUtils.randomAlphanumeric(21));
        doPost("/api/device/credentials", deviceCredentials)
        .andExpect(status().isBadRequest())
        .andExpect(statusReason(containsString("Incorrect access token length")));
    }

    @Test
    public void testFindTenantDevices() throws Exception {
        List<Device> devices = new ArrayList<>();
        for (int i=0;i<178;i++) {
            Device device = new Device();
            device.setName("Device"+i);
            devices.add(doPost("/api/device", device, Device.class));
        }
        List<Device> loadedDevices = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(23);
        TextPageData<Device> pageData = null;
        do {
            pageData = doGetTypedWithPageLink("/api/tenant/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevices.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());
        
        Collections.sort(devices, idComparator);
        Collections.sort(loadedDevices, idComparator);
        
        Assert.assertEquals(devices, loadedDevices);
    }
    
    @Test
    public void testFindTenantDevicesByName() throws Exception {
        String title1 = "Device title 1";
        List<Device> devicesTitle1 = new ArrayList<>();
        for (int i=0;i<143;i++) {
            Device device = new Device();
            String suffix = RandomStringUtils.randomAlphanumeric(15);
            String name = title1+suffix;
            name = i % 2 == 0 ? name.toLowerCase() : name.toUpperCase();
            device.setName(name);
            devicesTitle1.add(doPost("/api/device", device, Device.class));
        }
        String title2 = "Device title 2";
        List<Device> devicesTitle2 = new ArrayList<>();
        for (int i=0;i<75;i++) {
            Device device = new Device();
            String suffix = RandomStringUtils.randomAlphanumeric(15);
            String name = title2+suffix;
            name = i % 2 == 0 ? name.toLowerCase() : name.toUpperCase();
            device.setName(name);
            devicesTitle2.add(doPost("/api/device", device, Device.class));
        }
        
        List<Device> loadedDevicesTitle1 = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(15, title1);
        TextPageData<Device> pageData = null;
        do {
            pageData = doGetTypedWithPageLink("/api/tenant/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevicesTitle1.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());
        
        Collections.sort(devicesTitle1, idComparator);
        Collections.sort(loadedDevicesTitle1, idComparator);
        
        Assert.assertEquals(devicesTitle1, loadedDevicesTitle1);
        
        List<Device> loadedDevicesTitle2 = new ArrayList<>();
        pageLink = new TextPageLink(4, title2);
        do {
            pageData = doGetTypedWithPageLink("/api/tenant/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevicesTitle2.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());

        Collections.sort(devicesTitle2, idComparator);
        Collections.sort(loadedDevicesTitle2, idComparator);
        
        Assert.assertEquals(devicesTitle2, loadedDevicesTitle2);
        
        for (Device device : loadedDevicesTitle1) {
            doDelete("/api/device/"+device.getId().getId().toString())
            .andExpect(status().isOk());
        }
        
        pageLink = new TextPageLink(4, title1);
        pageData = doGetTypedWithPageLink("/api/tenant/devices?", 
                new TypeReference<TextPageData<Device>>(){}, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());
        
        for (Device device : loadedDevicesTitle2) {
            doDelete("/api/device/"+device.getId().getId().toString())
            .andExpect(status().isOk());
        }
        
        pageLink = new TextPageLink(4, title2);
        pageData = doGetTypedWithPageLink("/api/tenant/devices?", 
                new TypeReference<TextPageData<Device>>(){}, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());
    }
    
    @Test
    public void testFindCustomerDevices() throws Exception {
        Customer customer = new Customer();
        customer.setTitle("Test customer");
        customer = doPost("/api/customer", customer, Customer.class);
        CustomerId customerId = customer.getId();
        
        List<Device> devices = new ArrayList<>();
        for (int i=0;i<128;i++) {
            Device device = new Device();
            device.setName("Device"+i);
            device = doPost("/api/device", device, Device.class);
            devices.add(doPost("/api/customer/" + customerId.getId().toString() 
                            + "/device/" + device.getId().getId().toString(), Device.class));
        }
        
        List<Device> loadedDevices = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(23);
        TextPageData<Device> pageData = null;
        do {
            pageData = doGetTypedWithPageLink("/api/customer/" + customerId.getId().toString() + "/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevices.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());
        
        Collections.sort(devices, idComparator);
        Collections.sort(loadedDevices, idComparator);
        
        Assert.assertEquals(devices, loadedDevices);
    }
    
    @Test
    public void testFindCustomerDevicesByName() throws Exception {
        Customer customer = new Customer();
        customer.setTitle("Test customer");
        customer = doPost("/api/customer", customer, Customer.class);
        CustomerId customerId = customer.getId();

        String title1 = "Device title 1";
        List<Device> devicesTitle1 = new ArrayList<>();
        for (int i=0;i<125;i++) {
            Device device = new Device();
            String suffix = RandomStringUtils.randomAlphanumeric(15);
            String name = title1+suffix;
            name = i % 2 == 0 ? name.toLowerCase() : name.toUpperCase();
            device.setName(name);
            device = doPost("/api/device", device, Device.class);
            devicesTitle1.add(doPost("/api/customer/" + customerId.getId().toString() 
                    + "/device/" + device.getId().getId().toString(), Device.class));
        }
        String title2 = "Device title 2";
        List<Device> devicesTitle2 = new ArrayList<>();
        for (int i=0;i<143;i++) {
            Device device = new Device();
            String suffix = RandomStringUtils.randomAlphanumeric(15);
            String name = title2+suffix;
            name = i % 2 == 0 ? name.toLowerCase() : name.toUpperCase();
            device.setName(name);
            device = doPost("/api/device", device, Device.class);
            devicesTitle2.add(doPost("/api/customer/" + customerId.getId().toString() 
                    + "/device/" + device.getId().getId().toString(), Device.class));
        }
        
        List<Device> loadedDevicesTitle1 = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(15, title1);
        TextPageData<Device> pageData = null;
        do {
            pageData = doGetTypedWithPageLink("/api/customer/" + customerId.getId().toString() + "/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevicesTitle1.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());
        
        Collections.sort(devicesTitle1, idComparator);
        Collections.sort(loadedDevicesTitle1, idComparator);
        
        Assert.assertEquals(devicesTitle1, loadedDevicesTitle1);
        
        List<Device> loadedDevicesTitle2 = new ArrayList<>();
        pageLink = new TextPageLink(4, title2);
        do {
            pageData = doGetTypedWithPageLink("/api/customer/" + customerId.getId().toString() + "/devices?", 
                    new TypeReference<TextPageData<Device>>(){}, pageLink);
            loadedDevicesTitle2.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());

        Collections.sort(devicesTitle2, idComparator);
        Collections.sort(loadedDevicesTitle2, idComparator);
        
        Assert.assertEquals(devicesTitle2, loadedDevicesTitle2);
        
        for (Device device : loadedDevicesTitle1) {
            doDelete("/api/customer/device/" + device.getId().getId().toString())
            .andExpect(status().isOk());
        }
        
        pageLink = new TextPageLink(4, title1);
        pageData = doGetTypedWithPageLink("/api/customer/" + customerId.getId().toString() + "/devices?", 
                new TypeReference<TextPageData<Device>>(){}, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());
        
        for (Device device : loadedDevicesTitle2) {
            doDelete("/api/customer/device/" + device.getId().getId().toString())
            .andExpect(status().isOk());
        }
        
        pageLink = new TextPageLink(4, title2);
        pageData = doGetTypedWithPageLink("/api/customer/" + customerId.getId().toString() + "/devices?", 
                new TypeReference<TextPageData<Device>>(){}, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());
    }

}
