using OpenQA.Selenium;  
using OpenQA.Selenium.Firefox;  

public class Program {
    static void Main(string[] args) {

        Console.WriteLine("Starting");

        IWebDriver driver = new FirefoxDriver();

        // Base url: https://downsub.com/?url=https%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253D
        // Finished url: https://downsub.com/?url=https%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253D + video id
        string[] lines = File.ReadAllLines(@"/nfs/andre/Archive/Vtuber/Hologra/archive/hologra_downloaded.txt");
        foreach (string line in lines) {
            string videoId = line.Substring(8, 11);
            string fullUrl = "https://downsub.com/?url=https%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253D" + videoId;

            driver.Navigate().GoToUrl(fullUrl);
            Thread.Sleep(5000);

            IWebElement sub = driver.FindElement(By.XPath("//button[@data-title='[SRT] English']")); // Download subtitle file [WORKS]
            sub.Click();
            Thread.Sleep(3000);

            string fileName = "/nfs/andre/Archive/Vtuber/Hologra/archive/hologra_downloaded.txt";
            File.WriteAllLines(fileName, File.ReadAllLines(fileName).Where(l => l != line).ToList()); // Remove link from already downloaded video subs [WORKS]
        }

        driver.Close();

        Console.WriteLine("Ended");
    }
}