@page "/borrowings"
@using LibraryManagement.Shared.Models
@using BlazorWebAssembly.Services
@inject LibraryApiClient ApiClient
@inject NavigationManager Navigation
@inject IJSRuntime JS

<div class="max-w-6xl mx-auto py-12 px-6">
    <!-- Header -->
    <div class="flex justify-between items-end mb-16">
        <div>
            <h1 class="text-5xl font-black tracking-tight text-main mb-4">My Loans</h1>
            <p class="text-lg text-muted max-w-xl">
                Keep track of your reading journey and manage your active borrowings.
            </p>
        </div>
        <a href="/books" class="hidden md:block bg-body text-main border border-border px-8 py-3 rounded-xl font-bold hover:bg-card transition-all text-center">
            Browse More
        </a>
    </div>

    @if (_isLoading)
    {
        <div class="space-y-6">
            @for (int i = 0; i < 3; i++)
            {
                <div class="animate-pulse bg-card rounded-2xl border border-border h-32 w-full"></div>
            }
        </div>
    }
    else if (!_borrowings.Any())
    {
        <div class="text-center py-24 bg-card rounded-[2.5rem] border border-dashed border-border shadow-sm">
            <h3 class="text-2xl font-bold text-main mb-3">No active loans</h3>
            <p class="text-muted mb-8">You haven't borrowed any books yet. Explore our collection to get started.</p>
            <a href="/books" class="bg-primary text-white px-10 py-4 rounded-xl font-black hover:bg-primary-hover transition-all shadow-lg shadow-primary/20 inline-block text-center">
                Go to Catalog
            </a>
        </div>
    }
    else
    {
        <div class="space-y-6">
            @foreach (var loan in _borrowings)
            {
                <div class="bg-card rounded-2xl border border-border p-6 flex flex-col md:flex-row items-center gap-8 hover:border-primary/50 transition-all group">
                    <!-- Book Cover / Placeholder -->
                    <div class="w-20 h-28 bg-body rounded-lg overflow-hidden flex-shrink-0 border border-border flex items-center justify-center">
                        <svg class="w-8 h-8 text-muted opacity-20" 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 18.246 18.477 16.5 18c-1.746 0-3.332.477-4.5 1.253"></path></svg>
                    </div>

                    <!-- Details -->
                    <div class="flex-grow text-center md:text-left">
                        <h3 class="text-xl font-bold text-main mb-1 group-hover:text-primary transition-colors">@loan.BookTitle</h3>
                        <p class="text-sm text-muted font-medium mb-4 md:mb-0">ID: @loan.BookId</p>
                    </div>

                    <!-- Dates & Fines -->
                    <div class="grid grid-cols-2 md:grid-cols-3 gap-8 px-8 border-x border-border hidden lg:grid flex-grow">
                        <div>
                            <p class="text-[10px] font-black text-muted uppercase tracking-[0.2em] mb-1">Borrowed</p>
                            <p class="text-sm font-bold text-main">@loan.BorrowDate.ToString("MMM dd, yyyy")</p>
                        </div>
                        <div>
                            <p class="text-[10px] font-black text-muted uppercase tracking-[0.2em] mb-1">Due Date</p>
                            <p class="text-sm font-bold @(loan.DueDate < DateTime.UtcNow && loan.Status == "Borrowed" ? "text-red-500" : "text-main")">
                                @loan.DueDate.ToString("MMM dd, yyyy")
                            </p>
                        </div>
                        <div class="hidden md:block">
                            @if (loan.ReturnDate.HasValue)
                            {
                                <p class="text-[10px] font-black text-muted uppercase tracking-[0.2em] mb-1">Returned</p>
                                <p class="text-sm font-bold text-green-500">@loan.ReturnDate.Value.ToString("MMM dd, yyyy")</p>
                            }
                            else if (loan.FineAmount > 0)
                            {
                                <p class="text-[10px] font-black text-muted uppercase tracking-[0.2em] mb-1">Fine</p>
                                <p class="text-sm font-bold @(loan.IsFinePaid ? "text-muted line-through" : "text-red-500")">
                                    MMK @loan.FineAmount.ToString("N0")
                                </p>
                                @if (loan.IsFinePaid)
                                {
                                    <span class="text-[10px] text-green-500 font-black uppercase">Paid</span>
                                }
                            }
                            else
                            {
                                <p class="text-[10px] font-black text-muted uppercase tracking-[0.2em] mb-1">Fine</p>
                                <p class="text-sm font-bold text-muted">No Fines</p>
                            }
                        </div>
                    </div>

                    <!-- Status & Action -->
                    <div class="flex flex-col md:items-end gap-3 min-w-[150px]">
                        <span class='px-4 py-1.5 rounded-full text-[10px] font-black uppercase tracking-widest text-center @GetStatusColor(loan.Status)'>
                            @(loan.Status == "PendingReturn" ? "Pending" : loan.Status)
                        </span>
                        @if (loan.Status == "Borrowed")
                        {
                            <button @onclick="() => ReturnRequestAsync(loan)" class="text-xs font-bold text-primary hover:underline">
                                Request Return
                            </button>
                        }
                    </div>
                </div>
            }
        </div>
    }
</div>

@code {
    private bool _isLoading = true;
    private List<BorrowingDto> _borrowings = new();

    protected override async Task OnInitializedAsync()
    {
        await LoadData();
    }

    private async Task LoadData()
    {
        _isLoading = true;
        try
        {
            _borrowings = (await ApiClient.GetMyBorrowingsAsync()).ToList();
        }
        catch { }
        finally { _isLoading = false; }
    }

    private async Task ReturnRequestAsync(BorrowingDto loan)
    {
        bool confirmed = await JS.InvokeAsync<bool>("confirm", $"Request return for \"{loan.BookTitle}\"? It will be marked as pending until approved by a librarian.");
        if (!confirmed) return;

        var success = await ApiClient.RequestReturnAsync(loan.Id);
        if (success) 
        {
            await JS.InvokeVoidAsync("alert", "Return request submitted successfully!");
            await LoadData();
        }
        else
        {
            await JS.InvokeVoidAsync("alert", "Failed to submit return request.");
        }
    }

    private string GetStatusColor(string status) => status switch
    {
        "Borrowed" => "bg-blue-500/10 text-blue-500",
        "Returned" => "bg-green-500/10 text-green-500",
        "PendingReturn" => "bg-orange-500/10 text-orange-500",
        _ => "bg-body text-muted"
    };
}