using System;
using System.Windows.Forms;
using Step.Model;
using TeamDev.SDK.MVVM;
using static Step.Utils.Constants;
using static Step.Utils.StepLogger;

namespace Step.Utils
{
    public static class ExceptionManager
    {
        public static void Manage(Exception ex)
        {
            if (ex is System.IO.FileNotFoundException)
            {
                // File not found
                LogAndNotifyUsers(CreateMessageModel("Configuration file not found!", ex.Message, ERROR_LEVEL.FATAL));
                // Close the application
                Environment.Exit(1);
            }
            else if(ex is MySql.Data.MySqlClient.MySqlException)
            {
                // MySql Error
                LogAndNotifyUsers(CreateMessageModel("Database Error!", ex.Message, ERROR_LEVEL.FATAL));
            }
            else
            {
                if (ex.InnerException != null)
                {
                    Manage(ex.InnerException); // TODO test
                }
                else
                {
                    // Default case
                    LogAndNotifyUsers(CreateMessageModel("Generic Error!", ex.Message, ERROR_LEVEL.FATAL));
                    // Close the application
                    Environment.Exit(1);
                }
            }
        }

        public static void Manage(ERROR_LEVEL errorLevel, Exception exception)
        {
            Manage(errorLevel, exception.Message);
        }

        public static void Manage(ERROR_LEVEL errorLevel, string message) 
        {
            switch (errorLevel)
            {
                case ERROR_LEVEL.INFO:
                    {
                        // Log 
                        LogInfo(message);
                        // Notify users
                        NotifyUsers(CreateMessageModel("Info!", message, ERROR_LEVEL.INFO));
                    }
                    break;
                case ERROR_LEVEL.WARNING:
                    {
                        LogWarning(message);
                        NotifyUsers(CreateMessageModel("Warning!", message, ERROR_LEVEL.WARNING));
                    }
                    break;
                case ERROR_LEVEL.ERROR:
                    {
                        LogError(message);
                        NotifyUsers(CreateMessageModel("Error!", message, ERROR_LEVEL.ERROR));
                    }
                    break;
                case ERROR_LEVEL.FATAL:
                    {
                        LogFatal(message);
                        NotifyUsers(CreateMessageModel("Fatal Error!", message, ERROR_LEVEL.FATAL));
                        // Close the application
                        Environment.Exit(1);
                    }break;
                default:
                    {
                        LogFatal(message);
                        NotifyUsers(CreateMessageModel("Generic Error!", message, ERROR_LEVEL.FATAL));
                        // Close the application
                        Environment.Exit(1);
                    }
                    break;
            }
        }
        
        private static void LogAndNotifyUsers(ErrorMessageModel error)
        {
            // Log
            LogMessage(error.Message, (ERROR_LEVEL)error.errorLevel);
            NotifyUsers(error);
        }

        private static void NotifyUsers(ErrorMessageModel error)
        {
            if (error.errorLevel > (int)ERROR_LEVEL.WARNING)
            {
                // Notify user
                MessageBox.Show(error.Message, error.Title, MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                // Notify user
                MessageServices.Current.Publish(SEND_MESSAGE, null, error);
            }
        }

        private static ErrorMessageModel CreateMessageModel(string title, string message, ERROR_LEVEL level)
        {
            return new ErrorMessageModel()
            {
                Title = title,
                Message = message,
                errorLevel = (int)level
            };
        }
    }
}