@page "/admin/login"
@layout TaxBaik.Web.Components.Admin.Layout.BlankLayout
@attribute [AllowAnonymous]
@rendermode @(new InteractiveServerRenderMode(prerender: true))
@inject IApiClient ApiClient
@inject ILocalStorageService LocalStorageService
@inject IJSRuntime Js

<PageTitle>로그인</PageTitle>

<MudContainer MaxWidth="MaxWidth.Small" Class="admin-login-page 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>

        <EditForm Model="model" OnValidSubmit="HandleLogin">
            <DataAnnotationsValidator />
            <input class="mud-input mud-input-outlined mud-input-root mud-input-root-adorned-start mb-4"
                   style="width: 100%; min-height: 56px; padding: 16px 14px;"
                   placeholder="사용자명"
                   autocomplete="username"
                   @bind="model.Username" />

            <input type="password"
                   class="mud-input mud-input-outlined mud-input-root mud-input-root-adorned-start mb-4"
                   style="width: 100%; min-height: 56px; padding: 16px 14px;"
                   placeholder="비밀번호"
                   autocomplete="current-password"
                   @bind="model.Password" />

            <div class="mb-4">
                <input class="mud-checkbox" type="checkbox" @bind="model.RememberMe" />
                <label style="margin-left: 8px; cursor: pointer;">아이디 저장</label>
            </div>

            <div class="mud-alert mud-alert-filled-error mb-4 login-error-message" style="display:none;">로그인 중 오류가 발생했습니다.</div>

            <button type="submit"
                    class="mud-button-root mud-button mud-button-filled mud-button-filled-primary mud-elevation-0"
                    style="width: 100%; min-height: 52px; border: 0; border-radius: 4px; color: white;">
                <span>로그인</span>
            </button>
        </EditForm>
    </MudPaper>
</MudContainer>

@code {
    private LoginModel model = new();
    private const string RememberedUsernameKey = "admin-remembered-username";

    protected override async Task OnInitializedAsync()
    {
        try
        {
            var remembered = await LocalStorageService.GetItemAsStringAsync(RememberedUsernameKey);
            if (!string.IsNullOrEmpty(remembered))
            {
                model.Username = remembered;
            }
        }
        catch
        {
            // LocalStorage may be unavailable during prerender.
        }
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
            await Js.InvokeVoidAsync("taxbaikAdminSession.syncRouteClass");
    }

    private async Task HandleLogin()
    {
        var request = new { model.Username, model.Password };
        var response = await ApiClient.PostAsync<LoginResponse>("auth/login", request);

        if (response?.AccessToken == null || response?.RefreshToken == null)
        {
            return;
        }

        if (model.RememberMe)
        {
            await LocalStorageService.SetItemAsStringAsync(RememberedUsernameKey, model.Username);
        }
        else
        {
            await LocalStorageService.RemoveItemAsync(RememberedUsernameKey);
        }

        await Js.InvokeVoidAsync("localStorage.setItem", "accessToken", response.AccessToken);
        await Js.InvokeVoidAsync("localStorage.setItem", "refreshToken", response.RefreshToken);
        await Js.InvokeVoidAsync("localStorage.setItem", "tokenExpiry", DateTimeOffset.UtcNow.AddSeconds(response.ExpiresIn).ToUnixTimeMilliseconds().ToString());
        await Js.InvokeVoidAsync("window.location.assign", "/taxbaik/admin/dashboard");
    }

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

    private class LoginResponse
    {
        public string AccessToken { get; set; } = "";
        public string RefreshToken { get; set; } = "";
        public int ExpiresIn { get; set; }
    }
}