using Azure.Storage.Blobs;
using Screenshot_WorkerService.Interface;
using Screenshot_WorkerService.Service;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.UI;
using OpenQA.Selenium;
using OpenQA.Selenium.Support.Extensions;
using System.Drawing;

namespace Screenshot_WorkerService
{
    public class Worker : BackgroundService
    {
        private readonly ILogger<Worker> _logger;
        private readonly IBlobStorageServiceClient _blobServiceClient;

        public Worker(ILogger<Worker> logger, IBlobStorageServiceClient blobServiceClient)
        {
            _logger = logger;
            _blobServiceClient = blobServiceClient;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (!stoppingToken.IsCancellationRequested)
            {
                _logger.LogInformation("Worker running at: {time}", DateTime.Now);
                var timeout = 10;

                _logger.LogInformation("Reading urls values from blob");
                var urlConfiguration = await _blobServiceClient.DownloadConfigrationBlob();

                if (urlConfiguration.Urls is not null)
                {
                    foreach (var item in urlConfiguration.Urls)
                    {
                        _logger.LogInformation("Preparing headless web browser");
                        var options = new ChromeOptions();
                        options.AddArguments(new List<string> { "--headless", "--hide-scrollbars" });

                        using var driver = new ChromeDriver(options);
                        _logger.LogInformation("web browser complete");
                        driver.Manage().Window.Size = new Size(item.Width, item.Height);
                        driver.Navigate().GoToUrl(item.Url);
                        driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(timeout);

                        try
                        {
                            _logger.LogInformation($"Searching class element: {timeout}");
                            var element = new WebDriverWait(driver, TimeSpan.FromSeconds(timeout)).Until((d) =>
                            {
                                d.Navigate().GoToUrl(item.Url);
                                Thread.Sleep(5000);
                                return d.FindElement(By.ClassName("v-menu"));
                            });

                            var screenshot = driver.TakeScreenshot();
#if DEBUG
                            screenshot.SaveAsFile($"{DateTime.Now:yyyy-MM-dd-HH-mm-ss}.png");
#endif
                            //Save to blobStorage
                            _blobServiceClient.UploadImageToBlobAsync(screenshot);

                        }
                        catch (NoSuchElementException e)
                        {
                            // try Login
                            _logger.LogInformation($"Exception: {e.Message}");
                            _logger.LogInformation($"Trying automate login");

                            var username = driver.FindElement(By.Id("input-12\""));
                            username.Clear();
                            username.SendKeys("");

                            var password = driver.FindElement(By.Id("input-13"));
                            password.Clear();
                            password.SendKeys("");

                            var loginButton = driver.FindElement(By.XPath("//button[@class='v-btn v-btn--block v-btn--outlined theme--dark v-size--default primary--text']\r\n"));
                            loginButton.Click();

                            driver.Manage().Timeouts().PageLoad = TimeSpan.FromSeconds(timeout);

                            var screenshot = driver.TakeScreenshot();

#if DEBUG
                            screenshot.SaveAsFile($"{DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")}.png");
#endif
                            //Save to blobStorage
                            _blobServiceClient.UploadImageToBlobAsync(screenshot);
                        }
                        catch (WebDriverTimeoutException e)
                        {
                            _logger.LogInformation($"Exception trying login was timed out: {e.Message}");
                        }
                        catch (Exception e) {
                            _logger.LogInformation($"Exception: {e.Message}");
                        }
                    }
                }
                else
                {
                    _logger.LogWarning("Reading returned no urls, check the blobstorage for url values");
                }
                _logger.LogWarning("Done!");
                await Task.Delay(TimeSpan.FromMinutes(20), stoppingToken);
            }
        }
    }
}