use leptos::*;

fn format_bytes(bytes: i64) -> String {
    const UNITS: [&str; 6] = ["B", "KB", "MB", "GB", "TB", "PB"];
    if bytes < 1024 {
        return format!("{} B", bytes);
    }
    let i = (bytes as f64).log2().div_euclid(10.0) as usize;
    format!(
        "{:.1} {}",
        (bytes as f64) / 1024_f64.powi(i as i32),
        UNITS[i]
    )
}

fn format_speed(bytes_per_sec: i64) -> String {
    if bytes_per_sec == 0 {
        return "0 B/s".to_string();
    }
    format!("{}/s", format_bytes(bytes_per_sec))
}

#[component]
pub fn StatusBar() -> impl IntoView {
    let store = use_context::<crate::store::TorrentStore>().expect("store not provided");
    let stats = store.global_stats;
    let (theme_open, set_theme_open) = create_signal(false);

    view! {
        <div class="h-8 min-h-8 bg-base-200 border-t border-base-300 flex items-center px-4 text-xs gap-4 text-base-content/70">
            <div class="flex items-center gap-2 cursor-pointer hover:text-primary" title="Global Download Speed">
                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
                    <path stroke-linecap="round" stroke-linejoin="round" d="M9 12.75l3 3m0 0l3-3m-3 3v-7.5M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>
                <span class="font-mono">{move || format_speed(stats.get().down_rate)}</span>
                <Show when=move || (stats.get().down_limit.unwrap_or(0) > 0) fallback=|| ()>
                    <span class="text-[10px] opacity-60">
                        {move || format!("(Limit: {})", format_speed(stats.get().down_limit.unwrap_or(0)))}
                    </span>
                </Show>
            </div>
             <div class="flex items-center gap-2 cursor-pointer hover:text-primary" title="Global Upload Speed">
                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
                    <path stroke-linecap="round" stroke-linejoin="round" d="M15 11.25l-3-3m0 0l-3 3m3-3v7.5M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>
                <span class="font-mono">{move || format_speed(stats.get().up_rate)}</span>
                <Show when=move || (stats.get().up_limit.unwrap_or(0) > 0) fallback=|| ()>
                    <span class="text-[10px] opacity-60">
                        {move || format!("(Limit: {})", format_speed(stats.get().up_limit.unwrap_or(0)))}
                    </span>
                </Show>
            </div>

            <div class="ml-auto flex items-center gap-4">
                <button class="btn btn-ghost btn-xs btn-square" title="Alt Speed Limits">
                     <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
                        <path stroke-linecap="round" stroke-linejoin="round" d="M12 6v6h4.5m4.5 0a9 9 0 11-18 0 9 9 0 0118 0z" />
                    </svg>
                </button>
                <div class=move || {
                    let base = "dropdown dropdown-top dropdown-end";
                    if theme_open.get() {
                        format!("{} dropdown-open", base)
                    } else {
                        base.to_string()
                    }
                }>
                    <div
                        tabindex="0"
                        role="button"
                        class="btn btn-ghost btn-xs btn-square"
                        title="Change Theme"
                        on:click=move |_| set_theme_open.update(|v| *v = !*v)
                    >
                        <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
                            <path stroke-linecap="round" stroke-linejoin="round" d="M4.098 19.902a3.75 3.75 0 0 0 5.304 0l6.401-6.402M6.75 21A3.75 3.75 0 0 1 3 17.25V4.125C3 3.504 3.504 3 4.125 3h5.25c.621 0 1.125.504 1.125 1.125v4.072c0 .657.66 1.175 1.312 1.133 3.421-.22 6.187 2.546 6.187 5.965 0 1.595-.572 3.064-1.524 4.195" />
                        </svg>
                    </div>

                    <Show when=move || theme_open.get() fallback=|| ()>
                        // Backdrop to close on outside click
                        // iOS Safari requires cursor:pointer inline style for click events on div elements
                        <div
                            class="fixed inset-0 z-[99] bg-black/0"
                            style="cursor: pointer; -webkit-tap-highlight-color: transparent;"
                            role="button"
                            tabindex="-1"
                            on:click=move |_| set_theme_open.set(false)
                            on:touchend=move |e| {
                                e.prevent_default();
                                set_theme_open.set(false);
                            }
                        ></div>
                    </Show>

                    <ul tabindex="0" class="dropdown-content z-[100] menu p-2 shadow bg-base-200 rounded-box w-52 mb-2 border border-base-300 max-h-96 overflow-y-auto block">
                        {
                            let themes = vec![
                                "light", "dark", "cupcake", "dracula", "cyberpunk",
                                "emerald", "luxury", "nord", "sunset", "winter",
                                "night", "synthwave", "retro", "forest"
                            ];
                            themes.into_iter().map(|theme| {
                                view! {
                                    <li>
                                        <button
                                            class="text-xs capitalize"
                                            on:click=move |_| {
                                                let doc = web_sys::window().unwrap().document().unwrap();
                                                let _ = doc.document_element().unwrap().set_attribute("data-theme", theme);

                                                if let Some(meta) = doc.query_selector("meta[name='theme-color']").unwrap() {
                                                    let window = web_sys::window().unwrap();
                                                    if let Ok(Some(style)) = window.get_computed_style(&doc.body().unwrap()) {
                                                        if let Ok(color) = style.get_property_value("background-color") {
                                                            let _ = meta.set_attribute("content", &color);
                                                        }
                                                    }
                                                }

                                                set_theme_open.set(false);
                                            }
                                        >
                                            {theme}
                                        </button>
                                    </li>
                                }
                            }).collect::<Vec<_>>()
                        }
                    </ul>
                </div>

                 <button class="btn btn-ghost btn-xs btn-square" title="Settings">
                     <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-4 h-4">
                        <path stroke-linecap="round" stroke-linejoin="round" d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.212 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z" />
                        <path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                    </svg>
                </button>
            </div>
        </div>
    }
}