using Microsoft.EntityFrameworkCore;
using NLog;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace MP.MONO.Data
{
    public class DbAdmin : IDisposable
    {
        #region Private Fields

        private static NLog.Logger Log = LogManager.GetCurrentClassLogger();

        #endregion Private Fields

        #region Public Constructors

        public DbAdmin()
        {
        }

        #endregion Public Constructors

        #region Public Methods

        public static bool checkCreateUser(string username, string pwd)
        {
            bool answ = false;
            using (AdminContext adbCtx = new AdminContext())
            {
                // ricerca utente...
                var numUser = adbCtx
                    .UserList
                    .Where(x => x.User == username)
                    .ToList()
                    .Count;
                if (numUser > 0)
                {
                    answ = true;
                }
                if (!answ)
                {
                    // creo utente
                    string sqlCommand = "FLUSH PRIVILEGES;";
                    adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                    sqlCommand = $"CREATE USER '{username}'@'%' IDENTIFIED BY '{pwd}';";
                    adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                    sqlCommand = $"GRANT ALL ON *.* TO '{username}'@'%';";
                    adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                    sqlCommand = "FLUSH PRIVILEGES;";
                    adbCtx.Database.ExecuteSqlRaw(sqlCommand);
                }
            }
            return answ;
        }

        public static async Task<bool> migrateDbIdentity()
        {
            bool answ = false;
            using (UserIdentityDbContext dbCtx = new UserIdentityDbContext())
            {
                await dbCtx.Database.MigrateAsync();
                answ = true;
            }
            return answ;
        }

        public static async Task<bool> migrateDbMain()
        {
            bool answ = false;
            using (MapoMonoContext dbCtx = new MapoMonoContext())
            {
                await dbCtx.Database.MigrateAsync();
                answ = true;
            }
            return answ;
        }

        public void Dispose()
        {
        }

        #endregion Public Methods
    }
}