@page "/admin/login"
@using System.ComponentModel.DataAnnotations
@layout TaxBaik.Web.Components.Admin.Layout.BlankLayout
@attribute [AllowAnonymous]
@inject AuthService AuthService
@inject NavigationManager NavigationManager
@inject CustomAuthenticationStateProvider AuthStateProvider

<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" Disabled="isLoading">
                @if (isLoading)
                {
                    <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                    <span>로그인 중...</span>
                }
                else
                {
                    <span>로그인</span>
                }
            </MudButton>
        </MudForm>
    </MudPaper>
</MudContainer>

@code {
    private MudForm form;
    private bool isFormValid = false;
    private bool isLoading = false;
    private string errorMessage = "";

    private LoginModel model = new();

    private async Task HandleLogin()
    {
        if (isLoading)
            return;

        isLoading = true;
        errorMessage = "";

        try
        {
            var token = await AuthService.AuthenticateAndGenerateTokenAsync(model.Username, model.Password);

            if (token == null)
            {
                errorMessage = "사용자명 또는 비밀번호가 올바르지 않습니다.";
                isLoading = false;
                return;
            }

            await AuthStateProvider.LoginAsync(token);
            NavigationManager.NavigateTo("/taxbaik/admin/dashboard", forceLoad: false);
        }
        catch (Exception ex)
        {
            errorMessage = "로그인 중 오류가 발생했습니다.";
            isLoading = false;
        }
    }

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