@page "/admin/login"
@inject NavigationManager Navigation

<PageTitle>管理登录</PageTitle>

<section class="admin-login-page">
    <MudPaper Class="admin-login-panel" Elevation="0">
        <MudText Typo="Typo.h4">管理登录</MudText>
        <MudText Color="Color.Secondary">输入管理员密码后可以维护歌单和标签。</MudText>

        @if (Error == "1")
        {
            <MudAlert Severity="Severity.Error" Variant="Variant.Outlined">密码不正确。</MudAlert>
        }

        <form method="post" action="/admin/sign-in" class="native-form">
            <input type="hidden" name="returnUrl" value="@ResolvedReturnUrl" />
            <label class="native-field">
                <span>管理员密码</span>
                <input type="password" name="password" required autocomplete="current-password" />
            </label>
            <MudButton ButtonType="ButtonType.Submit"
                       Variant="Variant.Filled"
                       Color="Color.Primary"
                       StartIcon="@Icons.Material.Filled.Login"
                       FullWidth="true">
                登录
            </MudButton>
        </form>
    </MudPaper>
</section>

@code {
    [SupplyParameterFromQuery(Name = "error")]
    public string? Error { get; set; }

    [SupplyParameterFromQuery(Name = "returnUrl")]
    public string? ReturnUrl { get; set; }

    private string ResolvedReturnUrl => string.IsNullOrWhiteSpace(ReturnUrl) ? "/admin" : ReturnUrl;
}