using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography;
using Microsoft.EntityFrameworkCore;
using gswi.Data;
using gswi.Model;

namespace gswi
{
    public class DataSeeder
    {
        private readonly DatabaseContext _databaseContext;

        public DataSeeder(DatabaseContext databaseContext)
        {
            _databaseContext = databaseContext;
        }

        public void SeedData()
        {
            _databaseContext.Database.EnsureCreated();

            if (!_databaseContext.AuthUsers.Any())
            {
                
                var admin = new AuthUser()
                {
                    FirstName = "Admin",
                    LastName = "Administator",
                    EMail = "admin@localhost",
                    Password = ComputeHash("Administator", new SHA256CryptoServiceProvider()),
                    AuthRole = AuthRoles.Admin
                };

                var authUser = new AuthUser()
                {
                    FirstName = "Max",
                    LastName = "Mustermann",
                    EMail = "max.mustermann@gmail.com",
                    Password = ComputeHash("test1234", new SHA256CryptoServiceProvider()),
                };

                var authUser1 = new AuthUser()
                {
                    FirstName = "Max",
                    LastName = "Tester",
                    EMail = "max.mustermann@mustermail.com",
                    Password = ComputeHash("test1234", new SHA256CryptoServiceProvider()),
                };

                var authUser2 = new AuthUser()
                {
                    FirstName = "Max",
                    LastName = "Muster",
                    EMail = "max.mustermann@yahoo.com",
                    Password = ComputeHash("test1234", new SHA256CryptoServiceProvider()),
                };

                _databaseContext.AuthUsers.Add(admin);
                _databaseContext.AuthUsers.Add(authUser);
                _databaseContext.AuthUsers.Add(authUser1);
                _databaseContext.AuthUsers.Add(authUser2);
            }
            _databaseContext.SaveChanges();
        }

        public string ComputeHash(string input, HashAlgorithm algorithm)
        {
            Byte[] inputBytes = Encoding.UTF8.GetBytes(input);
            Byte[] hashedBytes = algorithm.ComputeHash(inputBytes);
            return BitConverter.ToString(hashedBytes);
        }
    }
}