using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using Newtonsoft.Json.Linq;

namespace Server;

public abstract class Route
{
    public static readonly string connectionString =
        "server=127.0.0.1;uid=monty;pwd=some_pass;database=devcon";

    public static void SendError(HttpListenerResponse response, Exception ex)
    {
        response.StatusCode = (int)HttpStatusCode.BadRequest;
        string errorMessage = $"Error: {ex.Message}";
        byte[] buffer = Encoding.UTF8.GetBytes(errorMessage);
        response.ContentType = "text/plain";
        response.ContentLength64 = buffer.Length;
        response.OutputStream.Write(buffer, 0, buffer.Length);
        response.Close();
    }

    public static void SendSuccess(HttpListenerResponse response)
    {
        response.StatusCode = (int)HttpStatusCode.OK;
        response.StatusDescription = "Status OK";
        response.Close();
    }

    public static void SendSuccess(HttpListenerResponse response, string jsonResponse)
    {
        response.StatusCode = (int)HttpStatusCode.OK;
        response.StatusDescription = "Status OK";
        byte[] buffer = Encoding.UTF8.GetBytes(jsonResponse);
        response.ContentType = "application/json";
        response.ContentLength64 = buffer.Length;
        response.OutputStream.Write(buffer, 0, buffer.Length);
        response.Close();
    }

    public static bool ValidateDate(string date)
    {
        Regex regex = new(@"^\d{4}-\d{2}-\d{2}$");
        return regex.IsMatch(date);
    }

    protected static Dictionary<string, string> ExtractBody(
        HttpListenerRequest request,
        List<string> allowedParams
    )
    {
        using StreamReader bodyReader = new(request.InputStream, request.ContentEncoding);
        JObject bodyJO = JObject.Parse(bodyReader.ReadToEnd());

        Dictionary<string, string> bodyParamValues = [];
        foreach (var prop in bodyJO.Properties())
        {
            if (allowedParams.Contains(prop.Name))
                bodyParamValues[prop.Name] = prop.Value.ToString();
        }
        return bodyParamValues;
    }
}