// See https://aka.ms/new-console-template for more information

if (args.Length < 3)
{
    Console.WriteLine("Usage: AdventOfCode-Downloader.exe <session-cookie> <year> <day>");
    return;
}

int year, day;
if (!(int.TryParse(args[1], out year) && year <= DateTime.Now.Year && year > 2015) || !(int.TryParse(args[2], out day) && day is >= 1 and <= 25))
{
    Console.WriteLine("Invalid year or date argument.\nYear must be between 2015 and current year and day must be between 1 and 25");
    return;
}

var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "AoC-PuzzleInputs", 
    year.ToString(), "Prod", $"day{day:00}.txt");
if(!Directory.Exists(Path.GetDirectoryName(path)))
    Directory.CreateDirectory(Path.GetDirectoryName(path)!);

var url = new Uri($"https://adventofcode.com/{year}/day/{day}/input");
using var client = new HttpClient();
client.DefaultRequestHeaders.Add("Cookie", $"session={args[0]}");
var responseMessage = await client.GetAsync(url);
if (responseMessage.IsSuccessStatusCode)
{
    var inputString = await responseMessage.Content.ReadAsStringAsync();
    await File.WriteAllTextAsync(path, inputString);
}
else
{
    var inputString = await responseMessage.Content.ReadAsStringAsync();
    Console.WriteLine($"Response status code does not indicate Success: {responseMessage.StatusCode} ({responseMessage.StatusCode.ToString()})\nError Message: " + inputString);
}