using HashidsNet;
using Newtonsoft.Json;

namespace UrlShortener;
public class Config
{
    public int Port {get;set;}=5555;
    public string HashIdsSalt {get;set;}="";

    public string UrlRoot {get;set;}="";
}
class Program
{
    
    static void Main(string[] args)
    {
        Config config = LoadConfig();
        IHashids ids = new Hashids(config.HashIdsSalt,11);
        UrlShortenerApp app=new UrlShortenerApp(config,ids);
        app.Run();
    }

    static Config LoadConfig()
    {
        Config? config=null;
        Directory.CreateDirectory("data");
        string configFile = Path.Combine("data","config.json");
        if(File.Exists(configFile))
        {
            config=JsonConvert.DeserializeObject<Config>(File.ReadAllText(configFile));
            if(config == null)
            {
                File.Delete(configFile);
                return LoadConfig();
            }
        }else{
            
            config = new Config();
        
        Console.Write("Enter Port [default: 5555]: ");
        var read = Console.ReadLine();
        if(!string.IsNullOrWhiteSpace(read) && int.TryParse(read,out var port))
        {
            config.Port = port;
        }
        read = "";

        
        while(string.IsNullOrWhiteSpace(read))
        {
            Console.Write("Enter Url Root: ");
            read = Console.ReadLine();
        }

        config.UrlRoot = read;
    
        Console.Write("Enter Hashids.net salt: ");
        read = Console.ReadLine();
        if(string.IsNullOrWhiteSpace(read))
        {
            read = Convert.ToBase64String(System.Security.Cryptography.RandomNumberGenerator.GetBytes(32));
        }
        config.HashIdsSalt = read;
        File.WriteAllText(configFile,JsonConvert.SerializeObject(config));

        }
        if(config == null) return new Config();
        return config;
    }
}