"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import {
  LayoutDashboard,
  BookOpen,
  CalendarRange,
  Coins,
  Landmark,
  FolderKanban,
  FileText,
  Wallet,
  Users,
  Building2,
  Briefcase,
  FileBarChart2,
  ShieldCheck,
  Settings,
  Moon,
  Sun,
  ChevronRight,
  Scale,
  Wrench,
  Truck,
  Plus,
  MoreHorizontal,
} from "lucide-react";
import { cn } from "@/lib/utils";
import { useColorMode } from "@/components/providers/ColorModeProvider";
import { Button } from "@/components/ds";

const NAV = [
  { href: "/accounting", label: "داشبورد", icon: LayoutDashboard },
  { href: "/accounting/chart-of-accounts", label: "دفتر حساب‌ها", icon: BookOpen },
  { href: "/accounting/fiscal", label: "سال و دوره مالی", icon: CalendarRange },
  { href: "/accounting/currencies", label: "ارزها", icon: Coins },
  { href: "/accounting/cost-centers", label: "مراکز هزینه", icon: Landmark },
  { href: "/accounting/projects", label: "پروژه‌ها", icon: FolderKanban },
  { href: "/accounting/vouchers", label: "اسناد و ثبت", icon: FileText },
  { href: "/accounting/ledger", label: "دفتر کل", icon: Scale },
  { href: "/accounting/treasury", label: "خزانه", icon: Wallet },
  { href: "/accounting/customers", label: "مشتریان", icon: Users },
  { href: "/accounting/suppliers", label: "تأمین‌کنندگان", icon: Truck },
  { href: "/accounting/assets", label: "دارایی‌ها", icon: Building2 },
  { href: "/accounting/payroll", label: "حقوق و دستمزد", icon: Briefcase },
  { href: "/accounting/reports", label: "گزارش‌ها", icon: FileBarChart2 },
  { href: "/accounting/audit", label: "حسابرسی", icon: ShieldCheck },
  { href: "/accounting/setup", label: "راه‌اندازی", icon: Wrench },
  { href: "/accounting/settings", label: "تنظیمات", icon: Settings },
];

const MOBILE_PRIMARY = [
  { href: "/accounting", label: "داشبورد", icon: LayoutDashboard },
  { href: "/accounting/vouchers", label: "اسناد", icon: FileText },
  { href: "/accounting/chart-of-accounts", label: "حساب‌ها", icon: BookOpen },
  { href: "/accounting/treasury", label: "خزانه", icon: Wallet },
  { href: "/accounting/setup", label: "بیشتر", icon: MoreHorizontal },
];

function isActive(pathname: string, href: string) {
  if (href === "/accounting") return pathname === "/accounting";
  return pathname === href || pathname.startsWith(`${href}/`);
}

export function AccountingShell({ children }: { children: React.ReactNode }) {
  const pathname = usePathname();
  const { mode, toggle } = useColorMode();

  return (
    <div className="flex min-h-[calc(100vh-4rem)] bg-[var(--canvas)]">
      <aside className="sticky top-16 hidden h-[calc(100vh-4rem)] w-64 shrink-0 overflow-y-auto border-l border-[var(--border)] bg-[var(--surface)] p-4 lg:block">
        <div className="mb-4 flex items-center justify-between px-2">
          <div>
            <p className="text-xs text-[var(--muted)]">ماژول</p>
            <p className="font-semibold text-secondary">حسابداری</p>
          </div>
          <Button type="button" variant="ghost" size="icon" onClick={toggle} aria-label="تغییر تم">
            {mode === "dark" ? <Sun className="h-4 w-4" /> : <Moon className="h-4 w-4" />}
          </Button>
        </div>
        <nav className="space-y-0.5">
          {NAV.map((item) => {
            const active = isActive(pathname, item.href);
            const Icon = item.icon;
            return (
              <Link
                key={item.href}
                href={item.href}
                className={cn(
                  "flex items-center gap-3 rounded-xl px-3 py-2.5 text-sm font-medium transition-colors",
                  active
                    ? "bg-primary text-white shadow-sm"
                    : "text-[var(--muted)] hover:bg-[var(--surface-muted)] hover:text-secondary"
                )}
              >
                <Icon className="h-4 w-4 shrink-0" />
                {item.label}
              </Link>
            );
          })}
        </nav>
        <Link
          href="/dashboard"
          className="mt-6 flex items-center gap-2 px-3 text-xs text-[var(--muted)] hover:text-secondary"
        >
          <ChevronRight className="h-3.5 w-3.5" />
          بازگشت به workspace
        </Link>
      </aside>

      <div className="relative min-w-0 flex-1 pb-20 lg:pb-0">
        <div className="hidden gap-2 overflow-x-auto border-b border-[var(--border)] bg-[var(--surface)] px-3 py-2 md:flex lg:hidden">
          {NAV.map((item) => {
            const active = isActive(pathname, item.href);
            return (
              <Link
                key={item.href}
                href={item.href}
                className={cn(
                  "whitespace-nowrap rounded-lg px-3 py-1.5 text-xs font-medium",
                  active ? "bg-primary text-white" : "text-[var(--muted)] hover:bg-[var(--surface-muted)]"
                )}
              >
                {item.label}
              </Link>
            );
          })}
        </div>

        <div className="mx-auto max-w-7xl px-4 py-6 sm:px-6">{children}</div>

        <nav className="fixed inset-x-0 bottom-0 z-40 border-t border-[var(--border)] bg-[var(--surface)]/95 backdrop-blur md:hidden">
          <div className="mx-auto flex max-w-lg items-stretch justify-around gap-1 px-2 py-1.5 pe-16">
            {MOBILE_PRIMARY.map((item) => {
              const active = isActive(pathname, item.href);
              const Icon = item.icon;
              return (
                <Link
                  key={item.href}
                  href={item.href}
                  className={cn(
                    "flex min-w-0 flex-1 flex-col items-center gap-0.5 rounded-lg px-1 py-1.5 text-[10px] font-medium",
                    active ? "text-primary" : "text-[var(--muted)]"
                  )}
                >
                  <Icon className="h-5 w-5 shrink-0" />
                  <span className="truncate">{item.label}</span>
                </Link>
              );
            })}
          </div>
          <Link
            href="/accounting/vouchers/new"
            className="absolute bottom-3 left-3 flex h-12 w-12 items-center justify-center rounded-full bg-primary text-white shadow-lg"
            aria-label="سند جدید"
          >
            <Plus className="h-6 w-6" />
          </Link>
        </nav>
      </div>
    </div>
  );
}