using System.Net;
using MySql.Data.MySqlClient;

namespace Server;

public class CreateEducation : SecuredRoute
{
    private static void ValidateParams(Dictionary<string, string> paramsToValidate)
    {
        string format = "yyyy-MM-dd";
        if (
            paramsToValidate["school"].Length > 70
            || string.IsNullOrEmpty(paramsToValidate["school"])
            || paramsToValidate["degree"].Length > 120
            || string.IsNullOrEmpty(paramsToValidate["degree"])
            || paramsToValidate["field"].Length > 100
            || string.IsNullOrEmpty(paramsToValidate["field"])
            || !DateTime.TryParseExact(
                paramsToValidate["from_date"],
                format,
                null,
                System.Globalization.DateTimeStyles.None,
                out _
            )
            || !DateTime.TryParseExact(
                paramsToValidate["to_date"],
                format,
                null,
                System.Globalization.DateTimeStyles.None,
                out _
            )
            || paramsToValidate["description"].Length > 1000
        )
        {
            throw new Exception("Wrong parameters");
        }
    }

    public static void HandleRequest(HttpListenerRequest request, HttpListenerResponse response)
    {
        try
        {
            List<string> bodyParamNames =
            [
                "school",
                "degree",
                "field",
                "from_date",
                "to_date",
                "description",
            ];
            string user_id = ExtractUserId(request);
            var bodyParamValues = ExtractBody(request, bodyParamNames);
            ValidateParams(bodyParamValues);

            bodyParamNames.Add("user_id");
            bodyParamValues["user_id"] = user_id;

            MySqlCommand cmd = new(CreateInsertQuery("education", bodyParamNames));

            cmd = AddValuesToCmd(bodyParamValues, cmd);

            using MySqlConnection conn = new(connectionString);
            conn.Open();
            cmd.Connection = conn;
            cmd.ExecuteNonQuery();

            SendSuccess(response);
        }
        catch (Exception ex)
        {
            SendError(response, ex);
        }
    }
}