using Api.SeaHavenIndustries.DTOs;
using Api.SeaHavenIndustries.Helper;
using Api.SeaHavenIndustries.Infrastructure;
using Data.SeaHavenIndustries;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.RateLimiting;
using Microsoft.Extensions.Logging;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Interfaces;
using System.Runtime.CompilerServices;
using System.Security.Claims;

namespace Api.SeaHavenIndustries.Controllers
{
    [ApiController]
    [Route("api/Authentication")]
    public class AuthenticationController : Controller
    {
        private readonly IAuthenticationService _authenticationService;
        private readonly ILogger<AuthenticationController> _logger;

        public AuthenticationController(IAuthenticationService authenticationService, ILogger<AuthenticationController> logger)
        {
            _authenticationService = authenticationService;
            _logger = logger;
        }

        [AllowAnonymous]
        [HttpPost]
        [Route("login")]
        public async Task<IActionResult> Login([FromBody] LoginModel model, CancellationToken cancellationToken)
        {
            try
            {
                var result = await _authenticationService.LoginAsync(model.Username, model.Password, cancellationToken);
                if (result != null)
                {
                    return Ok(LoginPayload.From(result));
                }

                return Unauthorized();
            }
            catch (Exception ex)
            {

                return StatusCode(500, _logger.Sanitize(ex));
            }

        }

        [Authorize]
        [Route("ChangePassword")]
        [HttpPost]
        public async Task<IActionResult> ChangePassword(ChangePasswords usermodel, CancellationToken cancellationToken)
        {
            // [Compare] already rejects this during model validation; the check here keeps the
            // unconfirmed password from ever being set if that validation is bypassed.
            if (!string.Equals(usermodel.Newpassword, usermodel.Confirmpassword, StringComparison.Ordinal))
                return BadRequest(new Response { Status = "Password confirmation does not match", Message = "Passwords don't match" });

            var userid = User.FindFirstValue(ClaimTypes.NameIdentifier) ?? "";
            var result = await _authenticationService.ChangePasswordAsync(userid, usermodel.Currentpassword, usermodel.Newpassword, cancellationToken);
            return result.Status switch
            {
                ChangePasswordStatus.Succeeded =>
                    Ok(new Response { Status = "Success ", Message = "Password successfully changed" }),
                ChangePasswordStatus.PasswordRejected =>
                    BadRequest(new Response { Status = "Password does not meet requirements", Message = PasswordRequirementsMessage }),
                ChangePasswordStatus.Failed =>
                    BadRequest(new Response { Status = "Password not changed", Message = "Your password could not be changed. Try again." }),
                _ => BadRequest(new Response { Status = "Old Password is incorrect", Message = "Current password is incorrect" })
            };
        }

        private const string PasswordRequirementsMessage =
            "Password must be at least 6 characters and include one uppercase letter, one number, and one special character.";

        [HttpPost]
        [Route("UpdateProfile")]
        public async Task<IActionResult> UserProfileUpdate([FromForm] User_DTO model, CancellationToken cancellationToken)
        {
            try
            {
                var userid = User.FindFirstValue(ClaimTypes.NameIdentifier) ?? "";
                var dto = new UpdateProfileRequestDTO
                {
                    Name = model.Name,
                    Email = model.Email,
                    Contact = model.Contact
                };
                var data = await _authenticationService.UpdateProfileAsync(userid, dto, cancellationToken);

                return Ok(new DataResponse
                {
                    Message = "Introduction Updated Successfully",
                    Status = "200",
                    Data = data == null ? null : new
                    {
                        data.FirstName,
                        data.Email,
                        data.Contact
                    }
                });
            }
            catch (Exception ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex) });
            }
        }

        #region Forget Password Area

        public const string ForgetPasswordMessage =
            "If that email belongs to an account, a reset code has been sent to it.";

        // Email and code are read only from the JSON body, so they never appear in URLs
        // or in proxy and load balancer access logs.
        [AllowAnonymous]
        [HttpPost()]
        [Route("ForgetPassword")]
        [EnableRateLimiting(PasswordResetRateLimiting.ForgetPasswordPolicy)]
        public async Task<IActionResult> ForgetPassword(
            [FromBody(EmptyBodyBehavior = EmptyBodyBehavior.Allow)] ForgetPasswordRequest_Dto? body,
            CancellationToken cancellationToken)
        {
            try
            {
                await _authenticationService.ForgetPasswordAsync(body?.Email, cancellationToken);
            }
            catch (Exception ex)
            {
                // Same answer as success: a failure only a registered address can hit
                // must not reveal that the address is registered.
                LogResetFailure(ex);
            }

            return Ok(new Response { Status = "Success ", Message = ForgetPasswordMessage });
        }

        [AllowAnonymous]
        [HttpPost()]
        [Route("VerificationCode")]
        [EnableRateLimiting(PasswordResetRateLimiting.VerificationCodePolicy)]
        public async Task<IActionResult> VerificationCode(
            [FromBody(EmptyBodyBehavior = EmptyBodyBehavior.Allow)] VerificationCode_Dto? body,
            CancellationToken cancellationToken)
        {
            try
            {
                if (await _authenticationService.VerifyCodeAsync(body?.Email, body?.Code, cancellationToken))
                {

                    return Ok(new Response { Status = "Success ", Message = "Code Matched" });
                }
                else
                {
                    return BadRequest(new Response { Status = "Error", Message = "Code Not Matched" });
                }
            }
            catch (Exception ex)
            {
                LogResetFailure(ex);
                return BadRequest(new Response { Status = "Error", Message = "Code Not Matched" });
            }
        }

        [AllowAnonymous]
        [HttpPost()]
        [Route("ResetPassword")]
        [EnableRateLimiting(PasswordResetRateLimiting.ResetPasswordPolicy)]
        public async Task<IActionResult> ResetPassword(ForgetPassword_Dto fpdto, CancellationToken cancellationToken)
        {
            try
            {
                if (await _authenticationService.ResetPasswordAsync(fpdto.Email, fpdto.Code, fpdto.Password, cancellationToken))
                {
                    return Ok(new Response { Status = "Success ", Message = "password changed" });
                }
                else
                {
                    return BadRequest(new Response { Status = "Error", Message = "Your email or code not found please check" });
                }
            }
            catch (Exception ex)
            {
                LogResetFailure(ex);
                return BadRequest(new Response { Status = "Error", Message = "Your email or code not found please check" });
            }
        }

        // These endpoints answer failures exactly like a wrong code or an unknown email, so
        // an error only a registered account can trigger reveals nothing. Exception
        // messages here can echo the email or code, so only the type is logged.
        private void LogResetFailure(Exception exception, [CallerMemberName] string operation = "")
        {
            _logger.LogError(
                "Password reset {Operation} failed with {ExceptionType}.",
                operation,
                exception.GetType().FullName);
        }
        #endregion
    }
}