using System;
using System.Linq;

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

using Icarus.Controllers.Managers;
using Icarus.Controllers.Utilities;
using Icarus.Models;
using Icarus.Database.Contexts;

namespace Icarus.Controllers.V1;

[Route("api/v1/login")]
[ApiController]
public class LoginController : ControllerBase
{
    #region Fields
    private string? _connectionString;
    private IConfiguration? _config;
    private ILogger<LoginController> _logger;
    #endregion


    #region Properties
    #endregion


    #region Contructors
    public LoginController(IConfiguration config, ILogger<LoginController> logger)
    {
        _logger = logger;
        _config = config;
        _connectionString = _config.GetConnectionString("DefaultConnection");
    }
    #endregion


    #region HTTP endpoints
    [HttpPost]
    public IActionResult Login([FromBody] User user)
    {
        var context = new UserContext(_connectionString!);

        _logger.LogInformation("Starting process of validating credentials");

        var message = "Invalid credentials";
        var password = user.Password;

        var loginRes = new LoginResult
        {
            Username = user.Username
        };

        try
        {
            if (context.Users.FirstOrDefault(usr => usr.Username!.Equals(user.Username)) != null)
            {
                user = context.Users.FirstOrDefault(usr => usr.Username!.Equals(user.Username))!;

                var validatePass = new PasswordEncryption();
                var validated = validatePass.VerifyPassword(user!, password!);
                if (!validated)
                {
                    loginRes.Message = message;
                    _logger.LogInformation(message);

                    return Ok(loginRes);
                }

                _logger.LogInformation("Successfully validated user credentials");

                TokenManager tk = new TokenManager(_config!);

                loginRes = tk.LoginSymmetric(user!);

                return Ok(loginRes);
            }
            else
            {
                loginRes.Message = message;

                return NotFound(loginRes);
            }
        }
        catch (Exception ex)
        {
            _logger.LogError("An error occurred: {0}", ex.Message);
            _logger.LogError("Inner Exception: {0}", ex.InnerException!.Message);
        }

        return NotFound(loginRes);
    }
    #endregion
}