using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Net.Mime;
using System.Threading.Tasks;
using Google.Apis.Auth.OAuth2;
using Google.Cloud.Firestore;
using Grpc.Auth;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Newtonsoft.Json;
using Teso_API.Methods.Controllers;
using Teso_API.Models;

namespace Teso_API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class UserAuthsController : ControllerBase
    {
        private readonly TESOContext _context;
        private readonly IWebHostEnvironment webHostEnvironemt;
        private FirestoreDb db;

        public UserAuthsController(TESOContext context, IWebHostEnvironment _webHostEnvironment)
        {
            _context = context;
            this.webHostEnvironemt = _webHostEnvironment;
           db = new FirestoreDbBuilder
            {
                ProjectId = ServerLocation.credentials.project_id,
                ChannelCredentials = GoogleCredential.FromJson(JsonConvert.SerializeObject(ServerLocation.credentials)).ToChannelCredentials(),
            }.Build();
        }

        [HttpGet("{id}")]
        public async Task<ActionResult<UserAuth>> GetUserAuth(string id)
        {
            var userAuth = await _context.UserAuths.FindAsync(id);

            if (userAuth == null)
            {
                return NotFound();
            }

            return userAuth;
        }

        [HttpPost]
        public async Task<ActionResult> PostUserAuth(Registrar userAuth)
        {
            string id = userAuth.user.Username + String.Format("{0:d9}", (DateTime.Now.Ticks / 10) % 10000000);
            userAuth.authentication.Password = passwordEncryption.Encrypt(userAuth.authentication.Password);
            userAuth.authentication.UserGUID = id;
            userAuth.user.UserGUID = id;

            userAuth.user.DateOfBirth = null;

            ActivationCodes activation = new ActivationCodes();
            activation.UserGuid = id;
            activation.CodeGuid = Guid.NewGuid().ToString();
            activation.DateGenerated = DateTime.Now;
            activation.Code = int.Parse(String.Format("{0:d6}", (DateTime.Now.Ticks / 10) % 100000));
            WriteBatch batch = db.StartBatch();

            if (String.IsNullOrEmpty(userAuth.referral) || (!String.IsNullOrEmpty(userAuth.referral) && (_context.Referrals.AsQueryable().Where(r => r.Referrer == userAuth.referral &&
            r.Datejoined.Value.Date == DateTime.Now.Date).Count()) >= 50))
            {
                UserFinance finance = new UserFinance();
                finance.Gold = 0;
                finance.Silver = 52;
                finance.UserGUID = userAuth.user.UserGUID;

                UserTransaction transaction = new UserTransaction();
                transaction.RealCash = 0;
                transaction.CoinType = await _context.CoinTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver")).Select(s => s.TypeCode).AsNoTracking().FirstOrDefaultAsync();
                transaction.Comments = "Welcome bonus";
                transaction.CoinAmount = 52;
                transaction.Timestamp = DateTime.Now;
                transaction.TransactionID = String.Format("{0:d9}", (DateTime.Now.Ticks / 10) % 10000000) + userAuth.user.UserGUID;
                transaction.UserGUID = userAuth.user.UserGUID;
                transaction.TransactionType = await _context.TransactionTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver credit")).Select(c => c.TypeCode).AsNoTracking().FirstOrDefaultAsync();
                _context.UserTransactions.Add(transaction);

                bool possible = await SilverBankOperations.WithdrawFromBank(52, _context);

                if (!possible)
                    return StatusCode(500);

                if (!String.IsNullOrEmpty(userAuth.referral))
                {
                    _context.Referrals.Add(new Referral
                    {
                        Datejoined = DateTime.Now,
                        Referred = userAuth.user.UserGUID,
                        Referrer = userAuth.referral,
                        Rewarded = false,
                    });
                }
                _context.UserFinances.Add(finance);

                DocumentReference docRef = db.Collection(ServerLocation.user_notifications).Document(userAuth.user.UserGUID).Collection(userAuth.user.UserGUID).Document();
                Dictionary<string, object> user = new Dictionary<string, object>
                    {
                        { "notificationType", "welcome" },
                        { "timestamp", new DateTimeOffset(DateTimeOffset.UtcNow.DateTime).ToUnixTimeMilliseconds()},
                        { "message", "Welcome to Teso App, as your welcome package you have been gifted 52 Silvers Coins for free. You may use them to acquire discount and freebie coupons!!!" },
                        { "recipient", userAuth.user.UserGUID },
                    };
                batch.Set(docRef, user);
            }
            else
            {
                List<UserFinance> finances = new List<UserFinance>{
                    new UserFinance
                    {
                        Gold = 0,
                        Silver = 52,
                        UserGUID = userAuth.user.UserGUID,
                    },
                    new UserFinance
                    {
                        Gold = 0,
                        Silver = 10,
                        UserGUID = userAuth.referral,
                    },
                };

                List<UserTransaction> transactions = new List<UserTransaction>() {
                    new UserTransaction
                    {
                            RealCash = 0,
                            CoinType = await _context.CoinTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver")).Select(s => s.TypeCode).AsNoTracking().FirstOrDefaultAsync(),
                            Comments = "Welcome bonus",
                            CoinAmount = 52,
                            Timestamp = DateTime.Now,
                            TransactionID = String.Format("{0:d9}", (DateTime.Now.Ticks / 10) % 10000000) + userAuth.user.UserGUID,
                            UserGUID = userAuth.user.UserGUID,
                            TransactionType = await _context.TransactionTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver credit")).Select(c => c.TypeCode).AsNoTracking().FirstOrDefaultAsync(),
                    },
                    new UserTransaction
                    {
                            RealCash = 0,
                            CoinType = await _context.CoinTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver")).Select(s => s.TypeCode).AsNoTracking().FirstOrDefaultAsync(),
                            Comments = "Referral bonus",
                            CoinAmount = 10,
                            Timestamp = DateTime.Now,
                            TransactionID = String.Format("{0:d9}", (DateTime.Now.Ticks / 10) % 10000000) + userAuth.user.UserGUID,
                            UserGUID = userAuth.referral,
                            TransactionType = await _context.TransactionTypes.AsQueryable().Where(c => c.TypeName.ToLower().Contains("silver credit")).Select(c => c.TypeCode).AsNoTracking().FirstOrDefaultAsync(),
                    },
            };
                bool possible = await SilverBankOperations.WithdrawFromBank(62, _context);
                if (!possible)
                    return StatusCode(500);
                DocumentReference docRef = db.Collection(ServerLocation.user_notifications).Document(userAuth.user.UserGUID).Collection(userAuth.user.UserGUID).Document();
                Dictionary<string, object> user = new Dictionary<string, object>
                    {
                        { "notificationType", "welcome" },
                        { "timestamp", new DateTimeOffset(DateTimeOffset.UtcNow.DateTime).ToUnixTimeMilliseconds()},
                        { "message", "Welcome to Teso App, as your welcome package we have gifted 52 Silvers Coins for free. You may use them to acquire discount and freebie coupons!!!" },
                        { "recipient", userAuth.user.UserGUID },
                    };
                batch.Set(docRef, user);

                DocumentReference docRef2 = db.Collection(ServerLocation.user_notifications).Document(userAuth.referral).Collection(userAuth.referral).Document();
                Dictionary<string, object> user2 = new Dictionary<string, object>
                    {
                        { "notificationType", "referral" },
                        { "timestamp", new DateTimeOffset(DateTimeOffset.UtcNow.DateTime).ToUnixTimeMilliseconds()},
                        { "message", "You just earned 10 Silver coins as your referral link was used!!!" },
                        { "recipient", userAuth.user.UserGUID },
                    };
                batch.Set(docRef2, user2);


                _context.UserFinances.AddRange(finances);
                _context.UserTransactions.AddRange(transactions);
                _context.Referrals.Add(new Referral
                {
                    Datejoined = DateTime.Now,
                    Referred = userAuth.user.UserGUID,
                    Referrer = userAuth.referral,
                    Rewarded = true,
                });
            }

            _context.UserAuths.Add(userAuth.authentication);
            _context.TesoUserDetails.Add(userAuth.user);
            _context.ActivationCodes.Add(activation);
            try
            {
                int result = activationCode(userAuth.user, activation.Code, activation.CodeGuid);
                if (result == 1)
                {
                    await _context.SaveChangesAsync();
                    await batch.CommitAsync();

                }
                else
                {
                    return BadRequest();
                }
            }
            catch (DbUpdateException)
            {
                if (UserAuthExists(userAuth.authentication.Username))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

            return Ok();
        }

        private bool UserAuthExists(string id)
        {
            return _context.UserAuths.Any(e => e.Username == id);
        }

        private AlternateView GetEmbeddedImage(int code, string firstname, string guid)
        {
            string filePath = Path.Combine(this.webHostEnvironemt.ContentRootPath, "teso.png");
            LinkedResource res = new LinkedResource(filePath, MediaTypeNames.Image.Jpeg);
            res.ContentId = Guid.NewGuid().ToString();
            string htmlBody = "<html>" +
                @"<body style=""padding:50px;"">" +
                @"<div style=""padding:20px;"">" +
                @"<center><img src = 'cid:" + res.ContentId + @"' /> <br>" +
                "<b><h1> TESO </h1><b>" +
                "<hr/>" +
               "</center>" +
               @"<p style=""font-size:18px; color:#003445;""> Hello " + firstname + ",</p><br/>" +
               @"<center> <h1 style=""font-size:24px; color:#003445;font-weight:bold;""> <b> Your verification code is <br/> " + code + "<b> </h1> <br/>" +
                @"<p style=""font-size:18px; color:#003445;"">" +
                "Enter this code in the TESO app to activate your account. <br/>" +
                "You could also click the button below to confirm your email address: <br/>" +
                @"<a href='" + ServerLocation.location + "api/activationhandler/" + guid + "'>" +
                @"<button style=""height: 60px; color: white; font-size:18px; background-color:#fd0a35;font-weight:bold;padding:10px;cursor:pointer;"">Activate Account</button></a> <br/>" +
                "If it wasn't you, someone must have mistakenly typed in your email. Keep this code to yourself; no other action is needed at this moment </p> <br/>" +
                @"<h2 style=""font-size:18px; color:#003445;"">Regards, <br/>" +
                "<b>TESO TEAM <b></h2>" +
                "</center>" +
                "</div>" +
                "</body>" +
                "</html>";
            AlternateView alternateView = AlternateView.CreateAlternateViewFromString(htmlBody, null, MediaTypeNames.Text.Html);
            alternateView.LinkedResources.Add(res);
            return alternateView;
        }

        private int activationCode(TesoUserDetail tesoUser, int Code, string verificationCode)
        {
            try
            {
                MailMessage mail = new MailMessage();
                string client = "mail.privateemail.com";
                string clientPort = "587";
                string username = "support@tesoapp.com";
                string password = "Konstantinovich96";
                SmtpClient smtpClient = new SmtpClient(client);
                mail.From = new MailAddress(username);
                mail.To.Add(tesoUser.Email);
                mail.Subject = "Verification Code";
                mail.AlternateViews.Add(GetEmbeddedImage(Code, tesoUser.Username, verificationCode));
                mail.IsBodyHtml = true;
                smtpClient.Port = int.Parse(clientPort);
                smtpClient.Credentials = new System.Net.NetworkCredential(username, password);
                smtpClient.EnableSsl = true;
                smtpClient.Timeout = 1000000;
                smtpClient.Send(mail);


                return 1;
            }
            catch
            {
                return 0;
            }
        }
    }
}