using System.Linq;

using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;

using TextSender_API.Models;
using TextSender_API.Repositories;

namespace TextSender_API.Controllers;

[ApiController]
[Route("api/v1/user")]
public class UsersController : ControllerBase
{
    #region Fields
    private readonly ILogger<UsersController> _logger;
    private IConfiguration _config;
    #endregion


    #region Constructors        

    public UsersController(ILogger<UsersController> logger, IConfiguration config)
    {
        this._logger = logger;
        this._config = config;
    }
    #endregion

    #region Methods
    [HttpPost("login")]
    public IActionResult Login([FromBody] User userRequest)
    {
        var response = new LoginResponse();

        try
        {
            var connString = this._config.GetConnectionString("MongoDBURI");
            var userRepo = new UsersRepository(connString!);
            var saltRepo = new SaltRepository(connString!);
            var pwdVerify = new PasswordVerification(userRepo, saltRepo);
            var result = userRepo.Exists(userRequest);

            if (result.Item1 && pwdVerify.VerifyPassword(result.Item2, userRequest.Password!))
            {
                response.Data.Add(result.Item2);
                Ok(response);
            }
            else
            {
                return NotFound(response);
            }
        }
        catch (Exception ex)
        {
            this._logger.LogError($"An error occurred: {ex.Message}");
        }

        return Ok(response);
    }

    [HttpPost("register"), DisableRequestSizeLimit]
    public IActionResult Upload([FromBody] User userRequest)
    {
        var response = new RegisterUserResponse();

        try
        {
            var connString = this._config.GetConnectionString("MongoDBURI");
            var userRepo = new UsersRepository(connString!);
            var saltRepo = new SaltRepository(connString!);
            var allUsers = userRepo.RetrieveAllUsers();
            var result = allUsers.Exists(ea => ea.Username!.Equals(userRequest.Username));

            if (!result)
            {
                var pwdVerify = new PasswordVerification(userRepo, saltRepo);
                var salt = pwdVerify.CreateSalt(userRequest);
                var hashedPassword = pwdVerify.HashPassword(userRequest, salt);

                this._logger.LogInformation("Creating user");
                userRequest.Password = hashedPassword;
                userRequest.DateCreated = DateTime.Now;
                userRepo.CreateUser(userRequest);

                response.Data.Add(userRequest);

                salt.UserId = userRequest.Id;
                saltRepo.Create(salt);
            }
            else
            {
                this._logger.LogInformation("User already exists");
            }
        }
        catch (Exception ex)
        {
            this._logger.LogError($"An error occurred: {ex.Message}");
        }

        return Ok(response);
    }
    #endregion

    #region Responses
    public class LoginResponse
    {
        #region Properties
        [JsonProperty("data")]
        public List<User> Data { get; set; }
        #endregion

        #region Constructors
        public LoginResponse()
        {
            this.Data = new List<User>();
        }
        #endregion

        #region Methods
        #endregion
    }

    public class RegisterUserResponse
    {
        #region Properties
        [JsonProperty("data")]
        public List<User> Data { get; set; }
        #endregion

        #region Constructors
        public RegisterUserResponse()
        {
            this.Data = new List<User>();
        }
        #endregion

        #region Methods
        #endregion
    }
    #endregion
}