@page "/createplaylist"
@attribute [Authorize]
@using System.Security.Claims
@using Microsoft.AspNetCore.Components.Authorization
@inject AuthenticationStateProvider AuthenticationStateProvider
@inject AppDbContext Db
@inject IYandexMusicService YandexService
@inject NavigationManager Navigation

<h3>Создание общего плейлиста</h3>

<EditForm Model="@model" OnValidSubmit="@HandleSubmit">
    <div class="mb-3">
        <label for="title">Название плейлиста</label>
        <InputText id="title" class="form-control" @bind-Value="model.Title" />
        <ValidationMessage For="@(() => model.Title)" />
    </div>
    <div class="mb-3">
        <label for="description">Описание (необязательно)</label>
        <InputText id="description" class="form-control" @bind-Value="model.Description" />
    </div>
    <button type="submit" class="btn btn-primary" disabled="@isLoading">@(isLoading ? "Создание..." : "Создать")</button>
</EditForm>

@code {
    private CreateModel model = new();
    private bool isLoading;
    private string? userId;
    
    public class CreateModel
    {
        [Required]
        public string Title { get; set; } = "";
        public string? Description { get; set; }
    }
    
    protected override async Task OnInitializedAsync()
    {
        var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
        userId = authState.User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
    }
    
    private async Task HandleSubmit()
    {
        if (string.IsNullOrEmpty(userId))
        {
            // пользователь не авторизован
            return;
        }
        
        isLoading = true;
        try
        {
            // 1. Создаём плейлист в Яндекс Музыке
            var yandexId = await YandexService.CreatePlaylistAsync(userId, model.Title);
            // 2. Сохраняем в БД
            var playlist = new SharedPlaylist
            {
                Id = Guid.NewGuid(),
                OwnerUserId = userId,
                YandexPlaylistId = yandexId,
                Title = model.Title,
                Description = model.Description,
                ShareSlug = Guid.NewGuid().ToString("N"),
                CreatedAt = DateTime.UtcNow
            };
            Db.SharedPlaylists.Add(playlist);
            await Db.SaveChangesAsync();
            Navigation.NavigateTo("/myplaylists");
        }
        catch (Exception ex)
        {
            // показать ошибку (можно добавить переменную errorMessage)
        }
        finally
        {
            isLoading = false;
        }
    }
}