/**
 * 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.dao.service;

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

import org.apache.commons.lang3.RandomStringUtils;
import org.junit.After;
import org.thingsboard.server.common.data.Customer;
import org.thingsboard.server.common.data.Tenant;
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.DataValidationException;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.datastax.driver.core.utils.UUIDs;

public class CustomerServiceImplTest extends AbstractServiceTest {

    private IdComparator<Customer> idComparator = new IdComparator<>();

    private TenantId tenantId;

    @Before
    public void before() {
        Tenant tenant = new Tenant();
        tenant.setTitle("My tenant");
        Tenant savedTenant = tenantService.saveTenant(tenant);
        Assert.assertNotNull(savedTenant);
        tenantId = savedTenant.getId();
    }

    @After
    public void after() {
        tenantService.deleteTenant(tenantId);
    }

    @Test
    public void testSaveCustomer() {
        Customer customer = new Customer();
        customer.setTenantId(tenantId);
        customer.setTitle("My customer");
        Customer savedCustomer = customerService.saveCustomer(customer);

        Assert.assertNotNull(savedCustomer);
        Assert.assertNotNull(savedCustomer.getId());
        Assert.assertTrue(savedCustomer.getCreatedTime() > 0);
        Assert.assertEquals(customer.getTenantId(), savedCustomer.getTenantId());
        Assert.assertEquals(customer.getTitle(), savedCustomer.getTitle());


        savedCustomer.setTitle("My new customer");

        customerService.saveCustomer(savedCustomer);
        Customer foundCustomer = customerService.findCustomerById(savedCustomer.getId());
        Assert.assertEquals(foundCustomer.getTitle(), savedCustomer.getTitle());

        customerService.deleteCustomer(savedCustomer.getId());
    }

    @Test
    public void testFindCustomerById() {
        Customer customer = new Customer();
        customer.setTenantId(tenantId);
        customer.setTitle("My customer");
        Customer savedCustomer = customerService.saveCustomer(customer);
        Customer foundCustomer = customerService.findCustomerById(savedCustomer.getId());
        Assert.assertNotNull(foundCustomer);
        Assert.assertEquals(savedCustomer, foundCustomer);
        customerService.deleteCustomer(savedCustomer.getId());
    }

    @Test(expected = DataValidationException.class)
    public void testSaveCustomerWithEmptyTitle() {
        Customer customer = new Customer();
        customer.setTenantId(tenantId);
        customerService.saveCustomer(customer);
    }

    @Test(expected = DataValidationException.class)
    public void testSaveCustomerWithEmptyTenant() {
        Customer customer = new Customer();
        customer.setTitle("My customer");
        customerService.saveCustomer(customer);
    }

    @Test(expected = DataValidationException.class)
    public void testSaveCustomerWithInvalidTenant() {
        Customer customer = new Customer();
        customer.setTitle("My customer");
        customer.setTenantId(new TenantId(UUIDs.timeBased()));
        customerService.saveCustomer(customer);
    }

    @Test(expected = DataValidationException.class)
    public void testSaveCustomerWithInvalidEmail() {
        Customer customer = new Customer();
        customer.setTenantId(tenantId);
        customer.setTitle("My customer");
        customer.setEmail("invalid@mail");
        customerService.saveCustomer(customer);
    }

    @Test
    public void testDeleteCustomer() {
        Customer customer = new Customer();
        customer.setTitle("My customer");
        customer.setTenantId(tenantId);
        Customer savedCustomer = customerService.saveCustomer(customer);
        customerService.deleteCustomer(savedCustomer.getId());
        Customer foundCustomer = customerService.findCustomerById(savedCustomer.getId());
        Assert.assertNull(foundCustomer);
    }

    @Test
    public void testFindCustomersByTenantId() {
        Tenant tenant = new Tenant();
        tenant.setTitle("Test tenant");
        tenant = tenantService.saveTenant(tenant);

        TenantId tenantId = tenant.getId();

        List<Customer> customers = new ArrayList<>();
        for (int i = 0; i < 135; i++) {
            Customer customer = new Customer();
            customer.setTenantId(tenantId);
            customer.setTitle("Customer" + i);
            customers.add(customerService.saveCustomer(customer));
        }

        List<Customer> loadedCustomers = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(23);
        TextPageData<Customer> pageData = null;
        do {
            pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
            loadedCustomers.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());

        Collections.sort(customers, idComparator);
        Collections.sort(loadedCustomers, idComparator);

        Assert.assertEquals(customers, loadedCustomers);

        customerService.deleteCustomersByTenantId(tenantId);

        pageLink = new TextPageLink(33);
        pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertTrue(pageData.getData().isEmpty());

        tenantService.deleteTenant(tenantId);
    }

    @Test
    public void testFindCustomersByTenantIdAndTitle() {
        String title1 = "Customer title 1";
        List<Customer> customersTitle1 = new ArrayList<>();
        for (int i = 0; i < 143; i++) {
            Customer customer = new Customer();
            customer.setTenantId(tenantId);
            String suffix = RandomStringUtils.randomAlphanumeric((int)(5 + Math.random()*10));
            String title = title1 + suffix;
            title = i % 2 == 0 ? title.toLowerCase() : title.toUpperCase();
            customer.setTitle(title);
            customersTitle1.add(customerService.saveCustomer(customer));
        }
        String title2 = "Customer title 2";
        List<Customer> customersTitle2 = new ArrayList<>();
        for (int i = 0; i < 175; i++) {
            Customer customer = new Customer();
            customer.setTenantId(tenantId);
            String suffix = RandomStringUtils.randomAlphanumeric((int)(5 + Math.random()*10));
            String title = title2 + suffix;
            title = i % 2 == 0 ? title.toLowerCase() : title.toUpperCase();
            customer.setTitle(title);
            customersTitle2.add(customerService.saveCustomer(customer));
        }

        List<Customer> loadedCustomersTitle1 = new ArrayList<>();
        TextPageLink pageLink = new TextPageLink(15, title1);
        TextPageData<Customer> pageData = null;
        do {
            pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
            loadedCustomersTitle1.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());

        Collections.sort(customersTitle1, idComparator);
        Collections.sort(loadedCustomersTitle1, idComparator);

        Assert.assertEquals(customersTitle1, loadedCustomersTitle1);

        List<Customer> loadedCustomersTitle2 = new ArrayList<>();
        pageLink = new TextPageLink(4, title2);
        do {
            pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
            loadedCustomersTitle2.addAll(pageData.getData());
            if (pageData.hasNext()) {
                pageLink = pageData.getNextPageLink();
            }
        } while (pageData.hasNext());

        Collections.sort(customersTitle2, idComparator);
        Collections.sort(loadedCustomersTitle2, idComparator);

        Assert.assertEquals(customersTitle2, loadedCustomersTitle2);

        for (Customer customer : loadedCustomersTitle1) {
            customerService.deleteCustomer(customer.getId());
        }

        pageLink = new TextPageLink(4, title1);
        pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());

        for (Customer customer : loadedCustomersTitle2) {
            customerService.deleteCustomer(customer.getId());
        }

        pageLink = new TextPageLink(4, title2);
        pageData = customerService.findCustomersByTenantId(tenantId, pageLink);
        Assert.assertFalse(pageData.hasNext());
        Assert.assertEquals(0, pageData.getData().size());
    }
}
