using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Net.Http.Headers;
using Teso_API.Models;

namespace Teso_API.Controllers
{
    [AllowAnonymous, Route("users")]
    [ApiController]
    public class FindUserController : ControllerBase
    {
        private readonly TESOContext _context;
        private readonly IWebHostEnvironment webHostEnvironment;

        public FindUserController(TESOContext context, IWebHostEnvironment hostEnvironment)
        {
            _context = context;
            webHostEnvironment = hostEnvironment;
        }

        [Authorize]
        [Route("finduser"), HttpPost]
        public async Task<ActionResult<TesoUser>> PostTesoUserDetail([FromBody] string userGUID)
        {
            var accessToken = Request.Headers[HeaderNames.Authorization];
            string token = accessToken;
            token = token.Substring(6).Trim();
            var handler = new JwtSecurityTokenHandler();
            var jwtToken = handler.ReadToken(token) as JwtSecurityToken;
            string userID = jwtToken.Claims.First(claim => claim.Type == "userGUID").Value;

            TesoUserDetail detail = await _context.TesoUserDetails.AsQueryable().Where(usr => usr.UserGUID == userGUID).FirstOrDefaultAsync();
            int friends = await _context.Relationships.AsQueryable().Where(t => t.UserGuid == userGUID).CountAsync();
            UserFinance finance = await _context.UserFinances.AsQueryable().Where(usr => usr.UserGUID == userGUID).FirstOrDefaultAsync();
            if (finance == null)
            {
                finance = new UserFinance();
                finance.Gold = 0;
                finance.Silver = 0;
            }
            TesoUser tesouser = new TesoUser();
            tesouser.userGUID = detail.UserGUID;
            tesouser.username = detail.Username;
            tesouser.firstname = detail.Firstname;
            tesouser.lastname = detail.Surname;
            tesouser.description = detail.Description;
            tesouser.email = detail.Email;
            tesouser.phonenumber = detail.Phonenumber.HasValue ? detail.Phonenumber.Value.ToString() : "";
            tesouser.address = detail.Address;
            tesouser.thumbnail_dp = detail.ThumbnailDp;
            tesouser.DateOfBirth = detail.DateOfBirth.Value;
            tesouser.country = detail.Country;
            tesouser.gender = detail.Gender;
            tesouser.gold = finance.Gold.ToString();
            tesouser.silver = finance.Silver.ToString();
            tesouser.friends = friends.ToString();


            if(_context.BlockedUsers.Any(r=> r.Initiator == userGUID && r.Target == userID))
            {
                return BadRequest();
            }
            return tesouser;

        }

        [Authorize]
        [Route("updateUser"), HttpPost]
        public async Task<ActionResult<TesoUser>> UpdateProfile(TesoUser user)
        {

            TesoUserDetail detail = new TesoUserDetail();
            detail.UserGUID = user.userGUID;
            detail.Username = user.username;
            detail.Firstname = user.firstname;
            detail.Surname = user.lastname;
            detail.Address = user.address;
            detail.Country = user.country;
            detail.Description = user.description;
            detail.DateOfBirth = user.DateOfBirth;
            detail.Email = user.email;
            detail.Gender = user.gender;
            detail.Phonenumber = int.Parse(!String.IsNullOrEmpty(user.phonenumber) ? user.phonenumber : "0");
            detail.ThumbnailDp = await UploadedFile(user);

            _context.Entry(detail).State = EntityState.Modified;
            try
            {
                await _context.SaveChangesAsync();
            }
            catch
            {
                return BadRequest();
            }

            user.thumbnail_dp = detail.ThumbnailDp;
            return Ok(user);
        }

        [Authorize]
        [Route("verifypassword"), HttpPost]
        public async Task<ActionResult> checkPassword([FromBody] string password)
        {
            var accessToken = Request.Headers[HeaderNames.Authorization];
            string token = accessToken;
            token = token.Substring(6).Trim();
            var handler = new JwtSecurityTokenHandler();
            var jwtToken = handler.ReadToken(token) as JwtSecurityToken;
            string userID = jwtToken.Claims.First(claim => claim.Type == "userGUID").Value;
            UserAuth auth = await _context.UserAuths.AsQueryable().Where(u => u.UserGUID == userID).FirstOrDefaultAsync();

            if (auth.AccountType == "TSUAC001")
            {
                auth.Password = passwordEncryption.Decrypt(auth.Password);
                if (auth.Password == password)
                {
                    return Ok("matched");
                }
                else
                {
                    return Ok("mismatched");
                }

            }
            else
            {
                return Ok(await _context.AccountTypes.AsQueryable().Where(u => u.TypeCode == auth.AccountType).Select(p => p.TypeName).FirstOrDefaultAsync());
            }
        }

        [Authorize]
        [Route("changepassword"), HttpPost]
        public async Task<ActionResult> changePassword([FromBody] string password)
        {
            var accessToken = Request.Headers[HeaderNames.Authorization];
            string token = accessToken;
            token = token.Substring(6).Trim();
            var handler = new JwtSecurityTokenHandler();
            var jwtToken = handler.ReadToken(token) as JwtSecurityToken;
            string userID = jwtToken.Claims.First(claim => claim.Type == "userGUID").Value;
            UserAuth auth = await _context.UserAuths.AsQueryable().Where(u => u.UserGUID == userID).FirstOrDefaultAsync();

            auth.Password = passwordEncryption.Encrypt(password);
            _context.Entry(auth).State = EntityState.Modified;
            try
            {
                await _context.SaveChangesAsync();
            }
            catch
            {
                return BadRequest();
            }

            return Ok();

        }
        
        
        private async Task<string> UploadedFile(TesoUser user)
        {
            try
            {
                if (user.displaypicture != null)
                {
                    string uniqueFileName;
                    uniqueFileName = user.userGUID +DateTime.Now.ToString("yyyyMMddHHmmssfff") + "dp.jpg";
                    string filePath = Path.Combine(ServerLocation.displayPicture, uniqueFileName);

                    var bytess = Convert.FromBase64String(user.displaypicture);
                    using (var fileStream = new FileStream(filePath, FileMode.Create))
                    {
                        fileStream.Write(bytess, 0, bytess.Length);
                        fileStream.Flush();
                    }
                    return uniqueFileName;
                }
                else
                {
                    return user.thumbnail_dp;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                return user.thumbnail_dp;
            }
        }
        [Authorize]
        [Route("blocked-users"), HttpGet]
        public async Task<List<TesoUser>> BlockedUsers()
        {
            var accessToken = Request.Headers[HeaderNames.Authorization];
            string token = accessToken;
            token = token.Substring(6).Trim();
            var handler = new JwtSecurityTokenHandler();
            var jwtToken = handler.ReadToken(token) as JwtSecurityToken;
            string userID = jwtToken.Claims.First(claim => claim.Type == "userGUID").Value;

            var persons = (from b in _context.BlockedUsers.AsQueryable()
                           join u in _context.TesoUserDetails on b.Target equals u.UserGUID
                           where b.Initiator == userID
                           select new TesoUser()
                           {
                               username = u.Username,
                               address = u.Address,
                               country = u.Country,
                               thumbnail_dp = u.ThumbnailDp,
                               email = u.Email,
                               firstname = u.Firstname,
                               lastname = u.Surname,
                               userGUID = u.UserGUID
                           }
                           ).OrderBy(p => p.firstname).ToListAsync();
            return await persons;
        }
    }
}