@*
    EN: POS terminal layout — Responsive full-screen layout with status bar + content.
        Desktop: Full sidebar + content. Tablet: Collapsible order drawer. Mobile: Bottom nav + full-screen overlay.
    VI: Layout POS — Layout toàn màn hình responsive với thanh trạng thái + nội dung.
        Desktop: Sidebar đầy đủ + nội dung. Tablet: Drawer đơn hàng thu gọn. Mobile: Nav dưới + overlay toàn màn hình.
    Design: pencil-design/src/pages/tPOS/pos/cafe/desktop.pen
*@
@inherits LayoutComponentBase
@implements IDisposable
@inject IStringLocalizer<PosLayout> L
@inject NavigationManager NavigationManager
@inject WebClientTpos.Client.Services.PosDataService DataService
@inject IJSRuntime JS
@inject WebClientTpos.Client.Services.AuthStateService AuthState

@* EN: Theme providers moved to App.razor (FRONT-W-06) — DefaultDark is the ThemeStateService default. *@
@* VI: Theme providers đã chuyển về App.razor (FRONT-W-06) — DefaultDark là mặc định của ThemeStateService. *@

<div class="pos-layout">
    @* ═══ STATUS BAR ═══ *@
    <header class="pos-status-bar">
        <div class="pos-status-bar__left">
            @* EN: Hamburger menu — visible on tablet/mobile only / VI: Menu hamburger — chi hien thi tren tablet/mobile *@
            <button class="pos-mobile-toggle"
                    @onclick="ToggleSidebar"
                    aria-label="@(_sidebarOpen ? "Đóng menu" : "Mở menu")"
                    aria-expanded="@(_sidebarOpen ? "true" : "false")"
                    aria-controls="pos-sidebar">
                <i data-lucide="@(_sidebarOpen ? "x" : "menu")" style="width:20px;height:20px;" aria-hidden="true"></i>
            </button>
            <span class="pos-status-bar__logo">aPOS POS</span>
            <span class="pos-status-bar__store">@StoreName</span>
        </div>
        <div class="pos-status-bar__right">
            <div class="pos-status-bar__indicator pos-status-bar__indicator--online">
                <span style="width:6px;height:6px;border-radius:100px;background:currentColor;"></span>
                <span>Online</span>
            </div>
            <span class="pos-status-bar__time">@_currentTime</span>
            @* EN: Order panel toggle — visible on tablet/mobile when order panel is hidden
               VI: Nút mở panel đơn hàng — hiện trên tablet/mobile khi panel đơn hàng ẩn *@
            <button class="pos-order-toggle"
                    @onclick="ToggleOrderPanel"
                    aria-label="@(_orderCount > 0 ? $"Đơn hàng ({_orderCount})" : "Đơn hàng")"
                    aria-expanded="@(_orderPanelOpen ? "true" : "false")"
                    aria-controls="pos-order-drawer-content">
                <i data-lucide="shopping-cart" style="width:18px;height:18px;" aria-hidden="true"></i>
                @if (_orderCount > 0)
                {
                    <span class="pos-order-toggle__badge" aria-hidden="true">@_orderCount</span>
                }
            </button>
            <button class="admin-icon-btn pos-admin-btn" @onclick="GoToPortal" aria-label="Quản lý">
                <i data-lucide="settings" aria-hidden="true"></i>
            </button>
        </div>
    </header>

    @* ═══ MAIN CONTENT ═══ *@
    <div class="pos-main">
        @* EN: Mobile sidebar overlay / VI: Overlay sidebar trên mobile *@
        @if (_sidebarOpen)
        {
            <div class="pos-sidebar-overlay" @onclick="CloseSidebar"></div>
        }

        @* EN: Sidebar navigation — collapsible on tablet/mobile
           VI: Sidebar điều hướng — thu gọn trên tablet/mobile *@
        <nav id="pos-sidebar"
             class="pos-sidebar @(_sidebarOpen ? "pos-sidebar--open" : "")"
             aria-label="POS navigation">
            <div class="pos-sidebar__header">
                <span style="font-size:15px;font-weight:700;color:var(--pos-orange-primary);">Menu</span>
                <button class="pos-sidebar__close" @onclick="CloseSidebar" aria-label="Đóng menu">
                    <i data-lucide="x" style="width:18px;height:18px;" aria-hidden="true"></i>
                </button>
            </div>
            <div class="pos-sidebar__nav">
                <a class="pos-sidebar__link" href="/pos/@_shopIdStr/karaoke" @onclick="CloseSidebar">
                    <i data-lucide="mic" style="width:18px;height:18px;"></i>
                    <span>Karaoke</span>
                </a>
                <a class="pos-sidebar__link" href="/pos/@_shopIdStr/restaurant" @onclick="CloseSidebar">
                    <i data-lucide="utensils" style="width:18px;height:18px;"></i>
                    <span>Nhà hàng</span>
                </a>
                <a class="pos-sidebar__link" href="/pos/@_shopIdStr/cafe" @onclick="CloseSidebar">
                    <i data-lucide="coffee" style="width:18px;height:18px;"></i>
                    <span>Café</span>
                </a>
                <a class="pos-sidebar__link" href="/pos/@_shopIdStr/spa" @onclick="CloseSidebar">
                    <i data-lucide="sparkles" style="width:18px;height:18px;"></i>
                    <span>Spa</span>
                </a>
                <a class="pos-sidebar__link" href="/pos/@_shopIdStr/retail" @onclick="CloseSidebar">
                    <i data-lucide="shopping-bag" style="width:18px;height:18px;"></i>
                    <span>Bán lẻ</span>
                </a>
            </div>
            <div class="pos-sidebar__footer">
                <a class="pos-sidebar__link" href="@(!string.IsNullOrEmpty(_shopIdStr) ? $"/admin/shop/{_shopIdStr}/overview" : AuthState.GetPortalUrl())" @onclick="CloseSidebar">
                    <i data-lucide="settings" style="width:18px;height:18px;"></i>
                    <span>Quản lý</span>
                </a>
            </div>
        </nav>

        @* EN: Page content area / VI: Vùng nội dung trang *@
        <div class="pos-page-content">
            <CascadingValue Value="this">
                @Body
            </CascadingValue>
        </div>

        @* EN: Order panel drawer — slides in from right on tablet/mobile
           VI: Drawer panel đơn hàng — trượt vào từ phải trên tablet/mobile *@
        @if (_orderPanelOpen)
        {
            <div class="pos-order-overlay" @onclick="CloseOrderPanel"></div>
        }
        <div class="pos-order-drawer @(_orderPanelOpen ? "pos-order-drawer--open" : "")">
            <div class="pos-order-drawer__header">
                <span style="font-size:15px;font-weight:700;">Đơn hàng</span>
                <button class="pos-order-drawer__close" @onclick="CloseOrderPanel" aria-label="Đóng panel đơn hàng">
                    <i data-lucide="x" style="width:18px;height:18px;" aria-hidden="true"></i>
                </button>
            </div>
            <div class="pos-order-drawer__content" id="pos-order-drawer-content">
                @* EN: Order panel content is rendered by child pages via RenderFragment
                   VI: Nội dung panel đơn hàng được render bởi trang con qua RenderFragment *@
                @if (OrderPanelContent is not null)
                {
                    @OrderPanelContent
                }
                else
                {
                    <div style="flex:1;display:flex;align-items:center;justify-content:center;color:var(--pos-text-tertiary);font-size:14px;padding:32px;">
                        Chưa có đơn hàng
                    </div>
                }
            </div>
        </div>
    </div>
</div>

@code {
    private string StoreName { get; set; } = "aPOS POS";
    private string _currentTime = DateTime.Now.ToString("HH:mm");
    private Timer? _timer;
    private string _shopIdStr = "";

    // EN: Responsive state / VI: Trạng thái responsive
    private bool _sidebarOpen;
    private bool _orderPanelOpen;
    private int _orderCount;

    /// <summary>
    /// EN: Optional order panel content — set by child POS pages via CascadingValue.
    /// VI: Nội dung panel đơn hàng tùy chọn — set bởi trang con POS qua CascadingValue.
    /// </summary>
    public RenderFragment? OrderPanelContent { get; set; }

    /// <summary>
    /// EN: Set order count badge on the order toggle button.
    /// VI: Đặt badge số lượng đơn hàng trên nút toggle đơn hàng.
    /// </summary>
    public void SetOrderCount(int count)
    {
        _orderCount = count;
        StateHasChanged();
    }

    /// <summary>
    /// EN: Open order panel drawer (tablet/mobile).
    /// VI: Mở drawer panel đơn hàng (tablet/mobile).
    /// </summary>
    public void OpenOrderPanel()
    {
        _orderPanelOpen = true;
        StateHasChanged();
    }

    protected override async Task OnInitializedAsync()
    {
        // EN: Update clock every 30 seconds / VI: Cập nhật đồng hồ mỗi 30 giây
        _timer = new Timer(_ =>
        {
            _currentTime = DateTime.Now.ToString("HH:mm");
            InvokeAsync(StateHasChanged);
        }, null, TimeSpan.FromSeconds(30), TimeSpan.FromSeconds(30));

        // EN: Extract shopId from URL path: /pos/{shopId}/...
        // VI: Trích xuất shopId từ URL: /pos/{shopId}/...
        try
        {
            var uri = new Uri(NavigationManager.Uri);
            var segments = uri.AbsolutePath.Split('/', StringSplitOptions.RemoveEmptyEntries);
            // Expected: ["pos", "{shopId}", "cafe"|"restaurant"|...]
            if (segments.Length >= 2 && Guid.TryParse(segments[1], out var shopId))
            {
                _shopIdStr = shopId.ToString();
                var shop = await DataService.GetShopByIdAsync(shopId);
                if (shop != null)
                    StoreName = shop.Name;
            }
        }
        catch
        {
            // EN: Fallback to default name / VI: Dùng tên mặc định nếu lỗi
        }
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        // EN: Re-init Lucide icons after every render (Blazor navigation replaces DOM)
        // VI: Khởi tạo lại Lucide icons sau mỗi lần render
        try { await JS.InvokeVoidAsync("lucide.createIcons"); } catch { }
    }

    private void GoToPortal()
    {
        // EN: Navigate to shop admin page if shopId is available, otherwise fallback to portal URL
        // VI: Điều hướng đến trang admin shop nếu có shopId, nếu không fallback về portal URL
        if (!string.IsNullOrEmpty(_shopIdStr))
            NavigationManager.NavigateTo($"/admin/shop/{_shopIdStr}/overview");
        else
            NavigationManager.NavigateTo(AuthState.GetPortalUrl());
    }

    private void ToggleSidebar() => _sidebarOpen = !_sidebarOpen;
    private void CloseSidebar() => _sidebarOpen = false;

    private void ToggleOrderPanel() => _orderPanelOpen = !_orderPanelOpen;
    private void CloseOrderPanel() => _orderPanelOpen = false;

    public void Dispose() => _timer?.Dispose();
}