@page "/login"
@using System.ComponentModel.DataAnnotations
@using Microsoft.AspNetCore.Authentication
@using Microsoft.AspNetCore.Authentication.Cookies
@layout TaxBaik.Admin.Components.Layout.BlankLayout
@attribute [AllowAnonymous]

<PageTitle>로그인</PageTitle>

<MudContainer MaxWidth="MaxWidth.Small" Class="d-flex align-center justify-center" Style="min-height: 100vh;">
    <MudPaper Class="pa-8" Elevation="3" Style="width: 100%; max-width: 400px;">
        <MudText Typo="Typo.h4" Class="mb-6 text-center">관리자 로그인</MudText>

        <MudForm @ref="form" @bind-IsValid="@isFormValid">
            <MudTextField @bind-Value="model.Username" Label="사용자명"
                Variant="Variant.Outlined" Required="true" Class="mb-4" />

            <MudTextField @bind-Value="model.Password" Label="비밀번호" InputType="InputType.Password"
                Variant="Variant.Outlined" Required="true" Class="mb-4" />

            @if (!string.IsNullOrEmpty(errorMessage))
            {
                <MudAlert Severity="Severity.Error" Class="mb-4">@errorMessage</MudAlert>
            }

            <MudButton Variant="Variant.Filled" Color="Color.Primary" FullWidth="true"
                Size="Size.Large" OnClick="HandleLogin">로그인</MudButton>
        </MudForm>
    </MudPaper>
</MudContainer>

@using Microsoft.AspNetCore.Authentication
@using System.Security.Claims
@using TaxBaik.Domain.Interfaces

@code {
    private MudForm form;
    private bool isFormValid = false;
    private string errorMessage = "";
    private LoginModel model = new();
    private bool isLoading = false;

    [Inject]
    private IAdminUserRepository AdminUserRepository { get; set; }

    [Inject]
    private NavigationManager NavigationManager { get; set; }

    [Inject]
    private HttpContextAccessor HttpContextAccessor { get; set; }

    private async Task HandleLogin()
    {
        if (!isFormValid) return;
        isLoading = true;
        errorMessage = "";

        try
        {
            var user = await AdminUserRepository.GetByUsernameAsync(model.Username);
            if (user == null || !BCrypt.Net.BCrypt.Verify(model.Password, user.PasswordHash))
            {
                errorMessage = "사용자명 또는 비밀번호가 올바르지 않습니다.";
                isLoading = false;
                return;
            }

            var claims = new List<Claim>
            {
                new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
                new Claim(ClaimTypes.Name, user.Username)
            };
            var claimsIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
            var authProperties = new AuthenticationProperties { IsPersistent = true };

            await HttpContextAccessor.HttpContext.SignInAsync(
                CookieAuthenticationDefaults.AuthenticationScheme,
                new ClaimsPrincipal(claimsIdentity),
                authProperties);

            NavigationManager.NavigateTo("/taxbaik/admin/dashboard");
        }
        catch (Exception ex)
        {
            errorMessage = $"로그인 중 오류: {ex.Message}";
        }
        finally
        {
            isLoading = false;
        }
    }

    private class LoginModel
    {
        public string Username { get; set; }
        public string Password { get; set; }
    }
}