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

<div class="fixed inset-0 z-50 flex flex-col h-screen overflow-hidden @ThemeBgClass()">
    
    <!-- Header Controls -->
    <header class="flex items-center justify-between px-6 py-4 border-b @HeaderBorderClass() transition-all">
        <div class="flex items-center gap-4">
            <button @onclick="OnClose" class="p-2 rounded-xl hover:bg-black/5 dark:hover:bg-white/5 text-slate-500 hover:text-slate-800 dark:hover:text-slate-100 cursor-pointer">
                <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18" />
                </svg>
            </button>
            <div>
                <h2 class="font-serif text-sm font-bold truncate max-w-xs sm:max-w-md">@Book.Title</h2>
                <p class="text-[10px] text-slate-400 font-mono uppercase">By @Book.Author • Chapter Page @(CurrentPage + 1) of @PagesCount()</p>
            </div>
        </div>

        <div class="flex items-center gap-3">
            <!-- Bookmark Button -->
            <button @onclick="ToggleBookmark" class="p-2 rounded-xl hover:bg-black/5 dark:hover:bg-white/5 cursor-pointer" title="Toggle Bookmark">
                <svg class="h-5 w-5 @(IsBookmarked ? "text-amber-500 fill-amber-500" : "text-slate-400")" viewBox="0 0 24 24" fill="currentColor">
                    <path d="M17 3H7c-1.1 0-1.99.9-1.99 2L5 21l7-3 7 3V5c0-1.1-.9-2-2-2z" />
                </svg>
            </button>

            <!-- Reader Settings Button -->
            <button @onclick="ToggleSettings" class="p-2 rounded-xl hover:bg-black/5 dark:hover:bg-white/5 text-slate-500 hover:text-slate-800 dark:hover:text-slate-100 cursor-pointer" title="Reader Font / Theme Customization">
                <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                </svg>
            </button>
        </div>
    </header>

    <!-- Reader Settings Overlay Panel -->
    @if (ShowSettings)
    {
        <div class="p-6 border-b @HeaderBorderClass() bg-black/5 dark:bg-white/5 space-y-4 animate-in slide-in-from-top duration-200">
            <div class="max-w-md mx-auto grid grid-cols-1 sm:grid-cols-2 gap-4">
                
                <!-- Theme Selectors -->
                <div class="space-y-1.5">
                    <label class="text-[10px] font-mono font-bold uppercase block opacity-70">Theme</label>
                    <div class="flex bg-black/10 dark:bg-white/10 p-1 rounded-xl">
                        <button @onclick='() => SetTheme("sepia")' class="flex-1 py-1 text-xs font-bold rounded-lg @(Theme == "sepia" ? "bg-amber-100 text-amber-950" : "text-slate-500")">Sepia</button>
                        <button @onclick='() => SetTheme("dark")' class="flex-1 py-1 text-xs font-bold rounded-lg @(Theme == "dark" ? "bg-slate-850 text-white" : "text-slate-500")">Dark</button>
                        <button @onclick='() => SetTheme("light")' class="flex-1 py-1 text-xs font-bold rounded-lg @(Theme == "light" ? "bg-white text-slate-800" : "text-slate-500")">Light</button>
                    </div>
                </div>

                <!-- Font Selectors -->
                <div class="space-y-1.5">
                    <label class="text-[10px] font-mono font-bold uppercase block opacity-70">Font Style</label>
                    <div class="flex bg-black/10 dark:bg-white/10 p-1 rounded-xl">
                        <button @onclick='() => SetFont("serif")' class="flex-1 py-1 text-xs font-bold font-serif rounded-lg @(Font == "serif" ? "bg-white/40 text-current" : "text-slate-500")">Serif</button>
                        <button @onclick='() => SetFont("sans")' class="flex-1 py-1 text-xs font-bold font-sans rounded-lg @(Font == "sans" ? "bg-white/40 text-current" : "text-slate-500")">Sans</button>
                        <button @onclick='() => SetFont("mono")' class="flex-1 py-1 text-xs font-bold font-mono rounded-lg @(Font == "mono" ? "bg-white/40 text-current" : "text-slate-500")">Mono</button>
                    </div>
                </div>

                <!-- Font Size Config -->
                <div class="sm:col-span-2 space-y-1">
                    <div class="flex justify-between text-[10px] font-mono opacity-70">
                        <span>Font Size</span>
                        <span>@(FontSize)px</span>
                    </div>
                    <input type="range" min="12" max="24" @bind="FontSize" class="w-full h-1 bg-slate-200 rounded-lg appearance-none cursor-pointer" />
                </div>

            </div>
        </div>
    }

    <!-- Reading Canvas Area -->
    <div class="flex-1 overflow-y-auto px-6 py-12 flex justify-center">
        <div class="max-w-2xl w-full leading-relaxed text-justify @FontClass() @TextContrastClass()" style="font-size: @(FontSize)px;">
            @if (Book.FullText != null && Book.FullText.Count > CurrentPage)
            {
                <p class="whitespace-pre-wrap">@Book.FullText[CurrentPage]</p>
            }
            else
            {
                <p class="italic text-center py-12">
                    Digital copy protection sandbox active. Reflowable text formatting is loading.
                </p>
            }
        </div>
    </div>

    <!-- Footer Controls -->
    <footer class="px-6 py-4 border-t @HeaderBorderClass() flex items-center justify-between">
        <button @onclick="PrevPage" class="px-4 py-2 rounded-xl bg-black/5 dark:bg-white/5 hover:bg-black/10 dark:hover:bg-white/10 text-xs font-bold transition-all flex items-center gap-1 cursor-pointer">
            Previous Page
        </button>

        <span class="text-xs font-mono font-semibold">Page @(CurrentPage + 1) of @PagesCount()</span>

        <button @onclick="NextPage" class="px-4 py-2 rounded-xl bg-black/5 dark:bg-white/5 hover:bg-black/10 dark:hover:bg-white/10 text-xs font-bold transition-all flex items-center gap-1 cursor-pointer">
            Next Page
        </button>
    </footer>

</div>

@code {
    [Parameter] public BookModel Book { get; set; } = new();
    [Parameter] public EventCallback OnClose { get; set; }
    [Parameter] public int CurrentPage { get; set; } = 0;
    [Parameter] public EventCallback<int> OnPageChanged { get; set; }

    private bool ShowSettings { get; set; } = false;
    private string Theme { get; set; } = "sepia";
    private string Font { get; set; } = "serif";
    private int FontSize { get; set; } = 16;
    private bool IsBookmarked { get; set; } = false;
    private List<int> Bookmarks { get; set; } = new();

    private void ToggleSettings()
    {
        ShowSettings = !ShowSettings;
    }

    private void ToggleBookmark()
    {
        if (Bookmarks.Contains(CurrentPage))
        {
            Bookmarks.Remove(CurrentPage);
            IsBookmarked = false;
        }
        else
        {
            Bookmarks.Add(CurrentPage);
            IsBookmarked = true;
        }
    }

    private int PagesCount()
    {
        return Book.FullText?.Count ?? 1;
    }

    private void NextPage()
    {
        if (Book.FullText != null && CurrentPage < Book.FullText.Count - 1)
        {
            CurrentPage++;
            IsBookmarked = Bookmarks.Contains(CurrentPage);
            OnPageChanged.InvokeAsync(CurrentPage);
        }
    }

    private void PrevPage()
    {
        if (CurrentPage > 0)
        {
            CurrentPage--;
            IsBookmarked = Bookmarks.Contains(CurrentPage);
            OnPageChanged.InvokeAsync(CurrentPage);
        }
    }

    private void SetTheme(string theme)
    {
        Theme = theme;
    }

    private void SetFont(string font)
    {
        Font = font;
    }

    private string ThemeBgClass()
    {
        return Theme switch
        {
            "sepia" => "bg-amber-50 text-amber-950",
            "dark" => "bg-slate-950 text-slate-100",
            _ => "bg-white text-slate-900"
        };
    }

    private string HeaderBorderClass()
    {
        return Theme == "dark" ? "border-white/5 bg-slate-900/40" : "border-black/5 bg-slate-100/40";
    }

    private string FontClass()
    {
        return Font switch
        {
            "sans" => "font-sans",
            "mono" => "font-mono",
            _ => "font-serif"
        };
    }

    private string TextContrastClass()
    {
        return Theme switch
        {
            "sepia" => "text-amber-900",
            "dark" => "text-slate-200",
            _ => "text-slate-800"
        };
    }
}