using Microsoft.Extensions.Logging;
using System.Configuration;

namespace CSS_Solution
{
    internal class ExceptionHandler
    {
        ILogger? exception_logger;
        public ExceptionHandler() 
        {
            exception_logger = Initialize.loggerFactory?.CreateLogger("Global exception");
            if(exception_logger == null)
                throw new Exception("logger create failed");
        }
        public void ApplicationThreadExceptionHandler(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            Exception exception = e.Exception;
            if (exception_logger == null)
            {
                exception_logger = Initialize.default_logger != null ? Initialize.default_logger : LoggerFactory.Create(builder =>
                {
                    Console.WriteLine(builder);
                    builder.AddConsole();
                }).CreateLogger("Global exception");
                if (exception_logger == null)
                {
                    Console.WriteLine($"[{DateTime.Now}] Weird!! Logger can't be initialized!");
                    Console.WriteLine($"[{DateTime.Now}] However, an exception has been caught");
                    Console.WriteLine($"[{DateTime.Now}] Message:\n{exception.Message}\nStackTrace:\n{exception.StackTrace}\n");
                    Program.mainForm?.Close();
                    return;
                }
                else
                    exception_logger.LogWarning($"[{DateTime.Now}] Something wrong with the exception logger, you should check it out.");
            }
            if (exception == null)
            {
                exception_logger.LogWarning($"[{DateTime.Now}] Weird!! Null exception catched");
                return;
            }
            string info = $"[{DateTime.Now}] Message:\n{exception.Message}\nStackTrace:\n{exception.StackTrace}\n";
            switch (exception)
            {
                case ConfigurationErrorsException:
                    exception_logger.LogError(info);
                    break;
                default:
                    exception_logger.LogWarning(info);
                    break;
            }
        }
    }
    
}