"use client";

import { LayoutGrid, X } from "lucide-react";
import { useCallback, useEffect, useState } from "react";
import { createPortal } from "react-dom";
import { toast } from "sonner";
import { createCatalogPage } from "@/actions/catalog";
import { Button } from "@/components/ui/button";
import { TooltipProvider } from "@/components/ui/tooltip";
import type { RootTab } from "@/types/catalog";
import { BreadcrumbBar } from "./breadcrumb-bar";
import { InlineEditor, type PageUpdateData } from "./inline-editor";
import { RootTabs } from "./root-tabs";
import { SortableTree } from "./sortable-tree";
import { StatsBar } from "./stats-bar";
import { CatalogManagerProvider, useCatalogManager } from "./use-catalog-store";

/**
 * Visual Catalog Manager — matches habbo-next UX (full-viewport editor).
 * Portal overlay (not Base UI Dialog) so the tree + editor mount reliably.
 */
export function CatalogManagerDialog({
	initialRoots = [],
}: {
	initialRoots?: RootTab[];
}) {
	const [open, setOpen] = useState(false);
	const [mounted, setMounted] = useState(false);

	useEffect(() => setMounted(true), []);

	useEffect(() => {
		if (!open) return;
		const prev = document.body.style.overflow;
		document.body.style.overflow = "hidden";
		const onKey = (e: KeyboardEvent) => {
			if (e.key !== "Escape") return;
			const tag = (e.target as HTMLElement)?.tagName;
			if (tag === "INPUT" || tag === "TEXTAREA" || tag === "SELECT") return;
			setOpen(false);
		};
		window.addEventListener("keydown", onKey);
		return () => {
			document.body.style.overflow = prev;
			window.removeEventListener("keydown", onKey);
		};
	}, [open]);

	return (
		<>
			<Button
				type="button"
				variant="outline"
				className="gap-2"
				onClick={() => setOpen(true)}
			>
				<LayoutGrid className="h-4 w-4" />
				Visual Manager
			</Button>
			{mounted && open
				? createPortal(
						<div className="fixed inset-0 z-[200]">
							<div className="absolute inset-0 bg-black/70" />
							<div
								role="dialog"
								aria-modal="true"
								aria-labelledby="visual-catalog-manager-title"
								className="fixed top-[2.5vh] left-[1vw] z-[201] flex h-[95vh] max-h-[95vh] w-[98vw] max-w-[98vw] flex-col overflow-hidden rounded-lg border border-[var(--admin-border)] bg-[var(--admin-canvas)] text-[var(--admin-text)] shadow-2xl"
								style={{ backgroundColor: "var(--admin-canvas)" }}
							>
								<CatalogManagerProvider>
									<CatalogManagerInner
										open={open}
										onOpenChange={setOpen}
										initialRoots={initialRoots}
									/>
								</CatalogManagerProvider>
							</div>
						</div>,
						document.body,
					)
				: null}
		</>
	);
}

function CatalogManagerInner({
	open,
	onOpenChange,
	initialRoots,
}: {
	open: boolean;
	onOpenChange: (v: boolean) => void;
	initialRoots: RootTab[];
}) {
	const { state, dispatch } = useCatalogManager();

	const loadRootPages = useCallback(async () => {
		dispatch({ type: "SET_LOADING_ROOT", loading: true });
		try {
			const res = await fetch("/api/admin/catalog/tree?parentId=-1");
			const data = await res.json().catch(() => ({}));
			if (!res.ok) throw new Error(data.error || "Failed to load roots");
			const pages: RootTab[] = (data.pages || []).map(
				(p: Record<string, unknown>) => ({
					id: Number(p.id),
					caption: String(p.caption ?? ""),
					iconImage: Number(p.iconImage) || 0,
					enabled: String(p.enabled ?? "0"),
					orderNum: Number(p.orderNum) || 0,
				}),
			);
			dispatch({ type: "SET_ROOT_PAGES", pages });

			const activeStillValid =
				state.activeTabId !== null &&
				pages.some((p) => p.id === state.activeTabId);
			if (pages.length > 0 && !activeStillValid) {
				dispatch({ type: "SET_ACTIVE_TAB", id: pages[0].id });
			}
		} catch {
			toast.error("Failed to load catalog root pages");
			dispatch({ type: "SET_LOADING_ROOT", loading: false });
		}
	}, [dispatch, state.activeTabId]);

	// Seed from SSR immediately, then refresh from API.
	useEffect(() => {
		if (!open) return;
		if (initialRoots.length > 0 && state.rootPages.length === 0) {
			const pages = initialRoots.map((p) => ({
				...p,
				id: Number(p.id),
				enabled: String(p.enabled),
			}));
			dispatch({ type: "SET_ROOT_PAGES", pages });
			if (state.activeTabId === null && pages[0]) {
				dispatch({ type: "SET_ACTIVE_TAB", id: pages[0].id });
			}
		}
		void loadRootPages();
		// eslint-disable-next-line react-hooks/exhaustive-deps
	}, [open]);

	useEffect(() => {
		if (!open) dispatch({ type: "ON_DIALOG_CLOSE" });
	}, [open, dispatch]);

	const handleTabClick = (id: number) => {
		if (
			state.editorDirty &&
			!confirm("You have unsaved changes. Discard?")
		) {
			return;
		}
		dispatch({ type: "SET_ACTIVE_TAB", id });
	};

	const handleCreateRoot = async () => {
		const caption = prompt("Root page name:");
		if (!caption?.trim()) return;
		try {
			const result = await createCatalogPage({
				parentId: -1,
				caption: caption.trim(),
			});
			if (!result.ok) throw new Error(result.error);
			await loadRootPages();
			toast.success("Root page created");
		} catch {
			toast.error("Failed to create root page");
		}
	};

	const handleSelectPage = (id: number) => {
		if (
			state.editorDirty &&
			!confirm("You have unsaved changes. Discard?")
		) {
			return;
		}
		dispatch({ type: "SELECT_PAGE", id: id > 0 ? id : null });
	};

	const handleEditTab = (id: number) => {
		if (state.activeTabId !== id) {
			dispatch({ type: "SET_ACTIVE_TAB", id });
		}
		if (
			state.editorDirty &&
			!confirm("You have unsaved changes. Discard?")
		) {
			return;
		}
		dispatch({ type: "SELECT_PAGE", id });
	};

	const handleEditorSaved = (updated: PageUpdateData) => {
		dispatch({ type: "UPDATE_NODE", update: { ...updated } });
		dispatch({ type: "SET_DIRTY", dirty: false });

		const rootIdx = state.rootPages.findIndex((p) => p.id === updated.id);
		if (rootIdx !== -1) {
			const pages = [...state.rootPages];
			pages[rootIdx] = {
				...pages[rootIdx],
				caption: updated.caption,
				enabled: updated.enabled,
			};
			dispatch({ type: "SET_ROOT_PAGES", pages });
		}
	};

	return (
		<TooltipProvider delayDuration={300}>
			<div
				className="flex shrink-0 items-center justify-between gap-2 border-b border-[var(--admin-border)] px-4 py-2.5"
				style={{ backgroundColor: "var(--admin-surface)" }}
			>
				<h2
					id="visual-catalog-manager-title"
					className="flex items-center gap-2 text-base font-semibold leading-none"
				>
					<LayoutGrid className="h-4 w-4" />
					Visual Catalog Manager
				</h2>
				<Button
					type="button"
					variant="ghost"
					size="icon"
					className="h-8 w-8 shrink-0"
					onClick={() => onOpenChange(false)}
					aria-label="Close"
				>
					<X className="h-4 w-4" />
				</Button>
			</div>

			<BreadcrumbBar />

			<RootTabs
				tabs={state.rootPages}
				activeTabId={state.activeTabId}
				onTabClick={handleTabClick}
				onEditTab={handleEditTab}
				onCreateRoot={handleCreateRoot}
				loading={state.loadingRoot}
			/>

			<div
				className="flex min-h-0 flex-1 overflow-hidden"
				style={{ backgroundColor: "var(--admin-canvas)" }}
			>
				<SortableTree
					activeTabId={state.activeTabId}
					selectedPageId={state.selectedPageId}
					onSelectPage={handleSelectPage}
					onTreeMutation={loadRootPages}
					nodeUpdate={null}
				/>
				<div
					className="flex min-h-0 min-w-0 flex-1 flex-col"
					style={{ backgroundColor: "var(--admin-canvas)" }}
				>
					<InlineEditor
						pageId={state.selectedPageId}
						onSaved={handleEditorSaved}
					/>
				</div>
			</div>

			<StatsBar />
		</TooltipProvider>
	);
}