@namespace MidrandBooks.Components
@using Microsoft.AspNetCore.Components
@using MidrandBooks.Models

<div id="library-view-razor" class="w-full max-w-7xl mx-auto px-4 sm:px-6 my-10 space-y-8 min-h-[500px]">

    <!-- Header Section -->
    <div class="flex flex-col sm:flex-row sm:items-end justify-between gap-4 border-b border-slate-100 pb-4">
        <div>
            <h2 class="font-serif text-2xl md:text-3xl font-bold text-slate-800 flex items-center gap-2">
                <svg class="h-7 w-7 text-slate-700" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253" />
                </svg>
                My Secure Library
            </h2>
            <p class="text-xs text-slate-500 mt-1">
                Access your licensed digital purchases. Sync progress instantly across all browsers.
            </p>
        </div>

        <!-- Format Filter Tabs -->
        <div class="flex bg-slate-100 border border-slate-200/60 p-1 rounded-xl self-start sm:self-auto">
            @foreach (var format in Formats)
            {
                <button @onclick="() => FilterByFormat(format)"
                        class="px-4 py-1.5 rounded-lg text-xs font-semibold uppercase tracking-wider transition-all cursor-pointer @(ActiveFormat == format ? "bg-white text-slate-900 shadow-sm border border-slate-200/50" : "text-slate-500 hover:text-slate-800")">
                    @format
                </button>
            }
        </div>
    </div>

    <!-- Grid Layout -->
    @if (FilteredLibraryItems().Any())
    {
        <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
            @foreach (var item in FilteredLibraryItems())
            {
                var book = item.Book;
                var isEbook = item.Format == "ebook";
                var isCached = OfflineBooks.Contains(book.Id);
                var isDownloading = DownloadingBookId == book.Id;

                <div class="group relative flex gap-5 rounded-2xl p-4 border border-slate-100 bg-white/70 backdrop-blur-md shadow-sm hover:shadow-md transition-all">

                    <!-- Book Cover -->
                    <div @onclick="() => HandleSelectBook(book)" class="relative h-36 w-24 rounded-xl overflow-hidden shadow-sm bg-slate-100 flex-shrink-0 cursor-pointer">
                        @if (!string.IsNullOrEmpty(book.CoverUrl))
                        {
                            <img src="@book.CoverUrl" alt="@book.Title" class="h-full w-full object-cover transition-transform duration-500 group-hover:scale-105" />
                        }
                        else
                        {
                            <div class="h-full w-full bg-gradient-to-br @book.CoverColor p-3 flex flex-col justify-between text-white transition-transform duration-500 group-hover:scale-105">
                                <span class="text-[6px] font-mono font-bold tracking-widest block uppercase text-white/40">@book.Category</span>
                                <span class="text-xs font-serif font-extrabold line-clamp-3 leading-tight text-white">@book.Title</span>
                                <span class="text-[8px] font-sans text-white/70 truncate block">By @book.Author</span>
                            </div>
                        }
                        <div class="absolute top-0 bottom-0 left-0 w-2 bg-gradient-to-r from-black/20 to-transparent" />
                    </div>

                    <!-- Details Node -->
                    <div class="flex-1 min-w-0 flex flex-col justify-between">
                        <div>
                            <div class="flex items-center justify-between">
                                <span class="inline-block text-[8px] font-mono font-extrabold uppercase rounded px-1.5 py-0.5 @(isEbook ? "bg-indigo-50 text-indigo-700" : "bg-violet-50 text-violet-700")">
                                    @item.Format
                                </span>

                                <!-- Offline Cache Trigger Button -->
                                @if (isEbook)
                                {
                                    @if (isCached)
                                    {
                                        <span class="inline-flex items-center gap-0.5 text-[9px] font-semibold text-emerald-600 font-mono" title="Synced Offline Cached copy secure">
                                            ✓ Cached
                                        </span>
                                    }
                                    else
                                    {
                                        <button @onclick="() => TriggerCacheBook(book.Id)" disabled="@isDownloading" class="text-[9px] font-bold text-violet-600 hover:text-violet-800 flex items-center gap-0.5 cursor-pointer disabled:opacity-50">
                                            @if (isDownloading)
                                            {
                                                <span>Caching...</span>
                                            }
                                            else
                                            {
                                                <span>↓ Sync Offline</span>
                                            }
                                        </button>
                                    }
                                }
                            </div>

                            <h3 @onclick="() => HandleSelectBook(book)" class="font-serif text-sm font-bold text-slate-800 leading-tight mt-1.5 hover:text-violet-600 cursor-pointer truncate">
                                @book.Title
                            </h3>
                            <span class="text-[10px] text-slate-400 block mt-0.5">By @book.Author</span>

                            <!-- Progress Track Slider bar -->
                            <div class="mt-3.5 space-y-1">
                                <div class="flex justify-between text-[8px] font-mono font-bold text-slate-400">
                                    <span>READING PROGRESS</span>
                                    <span>@(isEbook ? $"Page {item.CurrentPage + 1}" : "In Progress")</span>
                                </div>
                                <div class="w-full bg-slate-100 h-1.5 rounded-full overflow-hidden">
                                    <div class="bg-violet-600 h-full rounded-full transition-all" style="width: @(isEbook ? $"{item.Progress}%" : "15%")" />
                                </div>
                            </div>
                        </div>

                        <!-- Access Action Buttons -->
                        <div class="mt-4 flex gap-2">
                            @if (isEbook)
                            {
                                <button @onclick="() => HandleReadBook(book)" class="flex-1 py-1.5 text-center text-[10px] font-bold rounded-xl bg-slate-900 hover:bg-slate-800 text-white shadow-sm transition-colors cursor-pointer flex items-center justify-center gap-1">
                                    Open Ebook
                                </button>
                            }
                            else
                            {
                                <button @onclick="() => HandlePlayBook(book)" class="flex-1 py-1.5 text-center text-[10px] font-bold rounded-xl bg-amber-400 hover:bg-amber-300 text-slate-950 shadow-sm transition-colors cursor-pointer flex items-center justify-center gap-1">
                                    Listen Audio
                                </button>
                            }
                            <button @onclick="() => HandleSelectBook(book)" class="p-1.5 rounded-xl border border-slate-200 hover:bg-slate-50 text-slate-500 hover:text-slate-700 cursor-pointer" title="View details">
                                <svg class="h-4.5 w-4.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                                </svg>
                            </button>
                        </div>
                    </div>

                </div>
            }
        </div>
    }
    else
    {
        <div class="p-12 text-center border border-dashed border-slate-200 bg-slate-50/50 rounded-3xl space-y-2">
            <svg class="mx-auto h-8 w-8 text-slate-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253" />
            </svg>
            <h4 class="font-serif text-sm font-bold text-slate-700">Your secure library is empty</h4>
            <p class="text-[10px] text-slate-500 font-sans max-w-sm mx-auto leading-relaxed">
                Unlock local publishing titles, bestsellers, and studio audiobooks in our browse store. Purchases are instantly activated here.
            </p>
        </div>
    }

</div>

@code {
    [Parameter] public List<PurchaseRecord> Purchases { get; set; } = new();
    [Parameter] public List<BookModel> Books { get; set; } = new();
    [Parameter] public List<string> OfflineBooks { get; set; } = new();
    [Parameter] public bool IsOfflineMode { get; set; }

    [Parameter] public EventCallback<BookModel> OnSelectBook { get; set; }
    [Parameter] public EventCallback<BookModel> OnReadBook { get; set; }
    [Parameter] public EventCallback<BookModel> OnPlayBook { get; set; }
    [Parameter] public EventCallback<string> OnCacheBookOffline { get; set; }

    private string ActiveFormat { get; set; } = "all";
    private string[] Formats = new string[] { "all", "ebook", "audiobook" };
    private string? DownloadingBookId { get; set; }

    private void FilterByFormat(string format)
    {
        ActiveFormat = format;
    }

    private IEnumerable<LibraryItem> FilteredLibraryItems()
    {
        var items = new List<LibraryItem>();
        foreach (var purchase in Purchases)
        {
            var matchedBook = Books.FirstOrDefault(b => b.Id == purchase.BookId);
            if (matchedBook != null)
            {
                items.Add(new LibraryItem
                {
                    Book = matchedBook,
                    Format = purchase.Format,
                    CurrentPage = purchase.CurrentPage,
                    Progress = purchase.Progress
                });
            }
        }

        if (ActiveFormat == "all") return items;
        return items.Where(i => i.Format.Equals(ActiveFormat, StringComparison.OrdinalIgnoreCase));
    }

    private async Task TriggerCacheBook(string bookId)
    {
        if (DownloadingBookId != null) return;
        DownloadingBookId = bookId;

        await Task.Delay(1500); // Simulate network latency
        await OnCacheBookOffline.InvokeAsync(bookId);

        DownloadingBookId = null;
    }

    private void HandleSelectBook(BookModel book)
    {
        OnSelectBook.InvokeAsync(book);
    }

    private void HandleReadBook(BookModel book)
    {
        OnReadBook.InvokeAsync(book);
    }

    private void HandlePlayBook(BookModel book)
    {
        OnPlayBook.InvokeAsync(book);
    }
}