'use client';

import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { useEffect, useMemo, useState } from 'react';
import { ChevronRight } from 'lucide-react';
import { useTranslations } from 'next-intl';

import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
} from '@/components/ui/collapsible';
import {
  SidebarMenu,
  SidebarMenuButton,
  SidebarMenuItem,
  SidebarMenuSub,
  SidebarMenuSubButton,
  SidebarMenuSubItem,
} from '@/components/ui/sidebar';
import type { OpenFlareNavGroup } from '@/lib/navigation/openflare-nav';
import {
  matchesNavPath,
  openflareSidebarNav,
  isNavGroupActive,
} from '@/lib/navigation/openflare-nav';
import { usePublicConfig } from '@/hooks/use-public-config';

function parseMenuDisplayConfig(
  raw: string | undefined,
): Record<string, boolean> {
  if (!raw) return {};
  try {
    const parsed: unknown = JSON.parse(raw);
    if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed))
      return {};

    return Object.entries(parsed).reduce<Record<string, boolean>>(
      (result, [key, value]) => {
        if (typeof value === 'boolean') {
          result[key] = value;
        }
        return result;
      },
      {},
    );
  } catch {
    return {};
  }
}

function SidebarNavGroupMenuItem({
  group,
  pathname,
  onNavigate,
}: {
  group: OpenFlareNavGroup;
  pathname: string;
  onNavigate?: () => void;
}) {
  const t = useTranslations('layout');
  const groupTitle = t(`groups.${group.titleKey}`);
  const groupActive = isNavGroupActive(pathname, group);
  const [open, setOpen] = useState(groupActive);

  useEffect(() => {
    if (groupActive) {
      setOpen(true);
    }
  }, [groupActive]);

  return (
    <Collapsible
      asChild
      open={open}
      onOpenChange={setOpen}
      className='group/collapsible'
    >
      <SidebarMenuItem>
        <CollapsibleTrigger asChild>
          <SidebarMenuButton tooltip={groupTitle} isActive={groupActive}>
            <group.icon />
            <span>{groupTitle}</span>
            <ChevronRight className='ml-auto size-4 transition-transform duration-200 group-data-[state=open]/collapsible:rotate-90' />
          </SidebarMenuButton>
        </CollapsibleTrigger>
        <CollapsibleContent>
          <SidebarMenuSub>
            {group.items.map((item) => {
              const title = t(`nav.${item.titleKey}`);
              return (
                <SidebarMenuSubItem key={item.url}>
                  <SidebarMenuSubButton
                    asChild
                    isActive={matchesNavPath(pathname, item.url, item.childUrls)}
                  >
                    <Link href={item.url} onClick={onNavigate}>
                      <span>{title}</span>
                    </Link>
                  </SidebarMenuSubButton>
                </SidebarMenuSubItem>
              );
            })}
          </SidebarMenuSub>
        </CollapsibleContent>
      </SidebarMenuItem>
    </Collapsible>
  );
}

export function OpenFlareSidebarMenu({
  onNavigate,
}: {
  onNavigate?: () => void;
}) {
  const pathname = usePathname();
  const t = useTranslations('layout');
  const { config } = usePublicConfig();
  const displayConfig = useMemo(
    () => parseMenuDisplayConfig(config?.menu_display_config),
    [config],
  );

  return (
    <SidebarMenu className='gap-1'>
      {openflareSidebarNav.map((entry) => {
        if (entry.kind === 'group') {
          const filteredItems = entry.items.filter(
            (item) => displayConfig[item.url] !== false,
          );
          if (filteredItems.length === 0) return null;

          return (
            <SidebarNavGroupMenuItem
              key={entry.titleKey}
              group={{ ...entry, items: filteredItems }}
              pathname={pathname}
              onNavigate={onNavigate}
            />
          );
        }

        if (displayConfig[entry.url] === false) {
          return null;
        }

        const title = t(`nav.${entry.titleKey}`);
        return (
          <SidebarMenuItem key={entry.url}>
            <SidebarMenuButton
              tooltip={title}
              isActive={matchesNavPath(pathname, entry.url, entry.childUrls)}
              asChild
            >
              <Link href={entry.url} onClick={onNavigate}>
                <entry.icon />
                <span>{title}</span>
              </Link>
            </SidebarMenuButton>
          </SidebarMenuItem>
        );
      })}
    </SidebarMenu>
  );
}