<script lang="ts">
import { tick } from 'svelte';
import { fly } from 'svelte/transition';
import { page } from '$app/state';
import { m } from '$lib/paraglide/messages.js';
import EntityNavSection from './EntityNavSection.svelte';

let {
	userCount,
	groupCount,
	tagCount,
	canManageUsers,
	canManageTags,
	canManagePermissions,
	canRunMaintenance
}: {
	userCount: number;
	groupCount: number;
	tagCount: number;
	canManageUsers: boolean;
	canManageTags: boolean;
	canManagePermissions: boolean;
	canRunMaintenance: boolean;
} = $props();

const currentPath = $derived(page.url.pathname);
const isActive = (section: string) => currentPath.startsWith(`/admin/${section}`);

let flyoutOpen = $state(false);
let flyoutTriggerElement: HTMLButtonElement | null = null;

// All four section buttons open the same flyout that repeats the full nav.
// This is intentional: on tablet the flyout shows all sections as a wider navigation panel,
// not a context-specific panel for the clicked section.
async function openFlyout(event: MouseEvent) {
	flyoutTriggerElement = event.currentTarget as HTMLButtonElement;
	flyoutOpen = true;
	await tick();
	const firstLink = document.querySelector<HTMLAnchorElement>('[role="dialog"] a');
	firstLink?.focus();
}

function closeFlyout() {
	flyoutOpen = false;
	flyoutTriggerElement?.focus();
}

function handleKeydown(event: KeyboardEvent) {
	if (event.key === 'Escape' && flyoutOpen) {
		closeFlyout();
	}
}
</script>

{#snippet usersIcon()}
	<svg
		class="h-5 w-5 flex-shrink-0 {isActive('users') ? 'text-brand-mint' : 'text-white/40'}"
		fill="none"
		viewBox="0 0 24 24"
		stroke="currentColor"
		stroke-width="1.5"
		aria-hidden="true"
	>
		<path
			stroke-linecap="round"
			stroke-linejoin="round"
			d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z"
		/>
	</svg>
{/snippet}

{#snippet groupsIcon()}
	<svg
		class="h-5 w-5 flex-shrink-0 {isActive('groups') ? 'text-brand-mint' : 'text-white/40'}"
		fill="none"
		viewBox="0 0 24 24"
		stroke="currentColor"
		stroke-width="1.5"
		aria-hidden="true"
	>
		<path
			stroke-linecap="round"
			stroke-linejoin="round"
			d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z"
		/>
	</svg>
{/snippet}

{#snippet tagsIcon()}
	<svg
		class="h-5 w-5 flex-shrink-0 {isActive('tags') ? 'text-brand-mint' : 'text-white/40'}"
		fill="none"
		viewBox="0 0 24 24"
		stroke="currentColor"
		stroke-width="1.5"
		aria-hidden="true"
	>
		<path
			stroke-linecap="round"
			stroke-linejoin="round"
			d="M9.568 3H5.25A2.25 2.25 0 003 5.25v4.318c0 .597.237 1.17.659 1.591l9.581 9.581c.699.699 1.78.872 2.607.33a18.095 18.095 0 005.223-5.223c.542-.827.369-1.908-.33-2.607L11.16 3.66A2.25 2.25 0 009.568 3z"
		/>
		<path stroke-linecap="round" stroke-linejoin="round" d="M6 6h.008v.008H6V6z" />
	</svg>
{/snippet}

{#snippet systemIcon()}
	<svg
		class="h-5 w-5 flex-shrink-0 {isActive('system') ? 'text-brand-mint' : 'text-white/40'}"
		fill="none"
		viewBox="0 0 24 24"
		stroke="currentColor"
		stroke-width="1.5"
		aria-hidden="true"
	>
		<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-.213 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>
{/snippet}

<svelte:document onkeydown={handleKeydown} />

<!--
  Desktop (lg+): 120px with text labels
  Tablet (md–lg): 48px icon-only strip with flyout panel
-->
<nav
	class="flex flex-shrink-0 flex-col bg-brand-navy md:w-12 lg:w-30"
	aria-label={m.admin_heading()}
>
	<!-- Desktop-only heading -->
	<div
		class="hidden px-3 pt-3 pb-1 text-[9px] font-extrabold tracking-widest text-white/50 uppercase lg:block"
	>
		{m.admin_heading()}
	</div>

	{#if canManageUsers}
		<EntityNavSection
			variant="sidebar"
			href="/admin/users"
			label={m.admin_tab_users()}
			isActive={isActive('users')}
			count={userCount}
			onTabletTrigger={openFlyout}
			icon={usersIcon}
		/>
	{/if}

	{#if canManagePermissions}
		<EntityNavSection
			variant="sidebar"
			href="/admin/groups"
			label={m.admin_tab_groups()}
			isActive={isActive('groups')}
			count={groupCount}
			onTabletTrigger={openFlyout}
			icon={groupsIcon}
		/>
	{/if}

	{#if canManageTags}
		<EntityNavSection
			variant="sidebar"
			href="/admin/tags"
			label={m.admin_tab_tags()}
			isActive={isActive('tags')}
			count={tagCount}
			onTabletTrigger={openFlyout}
			icon={tagsIcon}
		/>
	{/if}

	<div class="flex-1"></div>

	{#if canRunMaintenance}
		<EntityNavSection
			variant="sidebar"
			href="/admin/system"
			label={m.admin_tab_system()}
			isActive={isActive('system')}
			topBorder={true}
			onTabletTrigger={openFlyout}
			icon={systemIcon}
		/>
	{/if}
</nav>

{#if flyoutOpen}
	<!-- Backdrop -->
	<div
		data-flyout-backdrop
		role="none"
		class="fixed inset-0 z-40 bg-black/40"
		onclick={closeFlyout}
	></div>

	<!-- Flyout panel -->
	<div
		role="dialog"
		aria-modal="true"
		aria-label={m.admin_heading()}
		class="fixed top-0 left-12 z-50 flex h-full w-40 flex-col bg-brand-navy shadow-xl"
		transition:fly={{ x: -160, duration: 180 }}
	>
		<!-- Heading -->
		<div class="px-3 pt-3 pb-1 text-[9px] font-extrabold tracking-widest text-white/50 uppercase">
			{m.admin_heading()}
		</div>

		{#if canManageUsers}
			<EntityNavSection
				variant="flyout"
				href="/admin/users"
				label={m.admin_tab_users()}
				isActive={isActive('users')}
				count={userCount}
				onFlyoutClick={closeFlyout}
				icon={usersIcon}
			/>
		{/if}

		{#if canManagePermissions}
			<EntityNavSection
				variant="flyout"
				href="/admin/groups"
				label={m.admin_tab_groups()}
				isActive={isActive('groups')}
				count={groupCount}
				onFlyoutClick={closeFlyout}
				icon={groupsIcon}
			/>
		{/if}

		{#if canManageTags}
			<EntityNavSection
				variant="flyout"
				href="/admin/tags"
				label={m.admin_tab_tags()}
				isActive={isActive('tags')}
				count={tagCount}
				onFlyoutClick={closeFlyout}
				icon={tagsIcon}
			/>
		{/if}

		<div class="flex-1"></div>

		{#if canRunMaintenance}
			<EntityNavSection
				variant="flyout"
				href="/admin/system"
				label={m.admin_tab_system()}
				isActive={isActive('system')}
				topBorder={true}
				onFlyoutClick={closeFlyout}
				icon={systemIcon}
			/>
		{/if}
	</div>
{/if}
