@page "/my-books"
@attribute [Authorize]
@implements IDisposable
@using NexusReader.UI.Shared.Components.Organisms
@using NexusReader.Application.DTOs.User
@using NexusReader.UI.Shared.Services
@using Microsoft.Extensions.Logging
@using System.Net.Http.Json
@inject HttpClient Http
@inject IReaderNavigationService ReaderNavigation
@inject ILibraryStateService LibraryStateService
@inject ILogger<MyBooks> Logger

<div class="my-books-page">
    <header class="my-books-header">
        <div class="header-title-section">
            <h1>Moje Książki</h1>
            <p class="subtitle">Twoje aktywne lektury i postępy w nauce z Nexus AI</p>
        </div>
        <AuthorizeView Roles="Admin, ContentManager">
            <button class="btn-nexus add-book-trigger" @onclick="() => _isModalOpen = true">
                <span class="btn-icon">+</span> Dodaj E-book
            </button>
        </AuthorizeView>
    </header>
    
    <BookIngestionModal @bind-IsOpen="_isModalOpen" @bind-IsOpen:after="RefreshLibrary" />
    
    <div class="my-books-content">
        @if (_isLoading)
        {
            <div class="my-books-loading-container">
                <div class="loader-card">
                    <div class="spinner-glow small"></div>
                    <span class="loader-text">Wczytywanie biblioteki...</span>
                </div>
                
                <div class="loading-grid">
                    @for (int i = 0; i < 3; i++)
                    {
                        <div class="skeleton-card">
                            <div class="skeleton-cover"></div>
                            <div class="skeleton-details">
                                <div class="skeleton-line title"></div>
                                <div class="skeleton-line author"></div>
                                <div class="skeleton-line progress"></div>
                            </div>
                        </div>
                    }
                </div>
            </div>
        }
        else if (_books == null || !_books.Any())
        {
            <div class="empty-state-container">
                <div class="empty-icon-pulse">
                    <svg width="64" height="64" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
                        <path d="M4 19.5A2.5 2.5 0 0 1 6.5 17H20"></path>
                        <path d="M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z"></path>
                    </svg>
                </div>
                <h3>Pusta biblioteka</h3>
                <p>Nie masz jeszcze żadnych książek na swojej półce. Przejdź do katalogu, aby rozpocząć kurs.</p>
                <a href="/catalog" class="btn-nexus catalog-btn">Przeglądaj Katalog</a>
            </div>
        }
        else
        {
            <div class="books-grid">
                @foreach (var book in _books)
                {
                    <div class="book-card" @onclick="() => OpenBook(book.Id)">
                        <div class="book-cover-container">
                            <img src="@(book.CoverUrl ?? "https://api.dicebear.com/7.x/identicon/svg?seed=" + book.Title)" alt="@book.Title" class="book-cover" />
                            <div class="cover-overlay">
                                <span class="read-action">Czytaj teraz</span>
                            </div>
                        </div>
                        <div class="book-details">
                            <h3 class="book-title" title="@book.Title">@book.Title</h3>
                            <p class="book-author">@book.Author.Name</p>
                            
                            @if (book.Progress > 0)
                            {
                                <div class="book-progress-section">
                                    <div class="progress-bar">
                                        <div class="progress-fill" style="width: @(book.Progress.ToString("F0"))%"></div>
                                    </div>
                                    <span class="progress-text">Postęp: @(book.Progress.ToString("F0"))% (@book.LastChapter)</span>
                                </div>
                            }
                            else
                            {
                                <span class="new-badge">Nowa</span>
                            }

                            <div class="card-actions">
                                <button class="btn-nexus primary-accent-btn">
                                    KONTYNUUJ KURS
                                </button>
                            </div>
                        </div>
                    </div>
                }
            </div>
        }
    </div>
</div>

@code {
    private bool _isModalOpen;
    private bool _isLoading = true;
    private List<LastReadBookDto>? _books;

    protected override void OnInitialized()
    {
        LibraryStateService.OnBooksChanged += HandleBooksChanged;
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            await LoadBooksAsync();
        }
    }

    private void HandleBooksChanged()
    {
        _ = InvokeAsync(LoadBooksAsync);
    }

    private async Task LoadBooksAsync()
    {
        _isLoading = true;
        StateHasChanged();
        
        try
        {
            _books = await Http.GetFromJsonAsync<List<LastReadBookDto>>("api/library/books");
            _isLoading = false;
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "[MyBooks] Failed to load books.");
            if (OperatingSystem.IsBrowser())
            {
                _isLoading = false;
            }
        }
        finally
        {
            StateHasChanged();
        }
    }

    private async Task RefreshLibrary()
    {
        await LoadBooksAsync();
    }

    private void OpenBook(Guid bookId)
    {
        ReaderNavigation.NavigateToBook(bookId);
    }

    public void Dispose()
    {
        LibraryStateService.OnBooksChanged -= HandleBooksChanged;
    }
}