using System;
using System.ComponentModel.DataAnnotations;
using System.Web.Http;
using Kreta.BusinessLogic.Helpers;
using Kreta.BusinessLogic.Security;
using Kreta.BusinessLogic.Utils;
using Kreta.Core.ConnectionType;
using Kreta.Framework;
using Kreta.Framework.Security;
using Kreta.User.WebApi.Attributes;
using Kreta.User.WebApi.Infrastructure;
using static Kreta.Core.Constants;

namespace Kreta.User.WebApi.Controllers
{
    [ApiKeyAuthorization]
    [RoutePrefix(Constants.RoutePrefix + Constants.VersionName)]
    public class AuthenticationController : ApiController
    {
        [Route("authenticate")]
        [HttpPost]
        public IHttpActionResult Authenticate(AuthenticationRequest authenticationRequest)
        {
            var organizationIdentifier = CommonUtils.GetOrganizationIdentifier();
            AuthenticationInfo authenticationInfo;

            try
            {
                authenticationInfo = !string.IsNullOrWhiteSpace(authenticationRequest.Password)
                                        ? AuthenticateByUserNameAndPassword(authenticationRequest.UserName, authenticationRequest.Password, organizationIdentifier)
                                        : AuthenticateByUserNameAndUniqueId(authenticationRequest.IdpUniqueId, organizationIdentifier);

            }
            catch (FrameworkException ex) when (ex is UserNotFoundException || ex is NextTanevBelepesException || ex is ArchivBelepesException)
            {
                return Unauthorized();
            }
            catch (Exception ex)
            {
                return InternalServerError(ex);
            }

            if (authenticationInfo == null)
            {
                return Unauthorized();
            }

            return Ok(authenticationInfo);
        }

        [Route("status")]
        [HttpGet]
        public IHttpActionResult Status()
        {
            return Ok("IAmAlive");
        }

        [Route("changePassword")]
        [HttpPost]
        public IHttpActionResult ChangePassword(ChangePasswordRequest changePasswordRequest)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest();
            }

            try
            {
                var organizationIdentifier = CommonUtils.GetOrganizationIdentifier();

                var loginInfo = new FelhasznaloBelepesHelper(new OrganizationConnectionType(0, 0, organizationIdentifier, 0)).AuthenticateUser(changePasswordRequest.Username, changePasswordRequest.Password);

                if (loginInfo == null || loginInfo.PasswordState == PasswordState.INVALID)
                {
                    throw new IncorrectPasswordException(loginInfo.BelepesiNev);
                }

                new FelhasznaloBelepesHelper(new MobileConnectionType(loginInfo.FelhasznaloId, loginInfo.IntezmenyId, loginInfo.IntezmenyAzonosito, loginInfo.AktivTanevId))
                  .ChangeUserPassword(changePasswordRequest.Username, changePasswordRequest.NewPassword);
            }
            catch (Exception ex)
            {
                return InternalServerError(ex);
            }

            return Ok();
        }

        private AuthenticationInfo AuthenticateByUserNameAndPassword(string userName, string password, string organizationIdentifier)
        {
            var loginInfo = new FelhasznaloBelepesHelper(new OrganizationConnectionType(0, 0, organizationIdentifier, 0)).AuthenticateUser(userName, password);

            if (loginInfo == null || loginInfo.PasswordState == PasswordState.INVALID)
            {
                return null;
            }

            var authenticationInfo = new AuthenticationHelper(new MobileConnectionType(loginInfo.FelhasznaloId, loginInfo.IntezmenyId, loginInfo.IntezmenyAzonosito, loginInfo.AktivTanevId)).GetAuthenticationInfo(loginInfo, intezmenyiDictionaryEnvironmentName: string.Empty);

            return authenticationInfo;
        }

        private AuthenticationInfo AuthenticateByUserNameAndUniqueId(Guid idpUniqueId, string organizationIdentifier)
        {
            var loginInfo = new FelhasznaloBelepesHelper(new OrganizationConnectionType(0, 0, organizationIdentifier, 0)).GetLoginInfo(bejelentkezesiNev: null, idpUniqueId);

            if (loginInfo == null)
            {
                return null;
            }

            var authenticationInfo = new AuthenticationHelper(new MobileConnectionType(loginInfo.FelhasznaloId, loginInfo.IntezmenyId, loginInfo.IntezmenyAzonosito, loginInfo.AktivTanevId)).GetAuthenticationInfo(loginInfo, intezmenyiDictionaryEnvironmentName: string.Empty);

            var userUniqueId = authenticationInfo.TutelaryIdpUniqueId ?? authenticationInfo.InstituteUserIdpUniqueId;

            if (idpUniqueId != userUniqueId)
            {
                return null;
            }

            return authenticationInfo;
        }

        public class AuthenticationRequest
        {
            public string UserName { get; set; }

            public string Password { get; set; }

            public Guid IdpUniqueId { get; set; }
        }

        public class ChangePasswordRequest
        {
            [Required]
            public string Username { get; set; }

            [Required]
            public string Password { get; set; }

            [Required]
            [StringLength(General.JelszoMaximumKarakterekSzama, MinimumLength = General.JelszoMinimumKarakterekSzama)]
            public string NewPassword { get; set; }
        }
    }
}