"use client";

import { useEffect, useState } from "react";

import { useRouter } from "next/navigation";

import { EllipsisVertical, LogOut, RefreshCw } from "lucide-react";
import { toast } from "sonner";

import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { SidebarMenu, SidebarMenuButton, SidebarMenuItem, useSidebar } from "@/components/ui/sidebar";
import { type AuthUser, getAuthUser, logout, ROLE_COLORS, ROLE_LABELS } from "@/lib/auth";
import { getInitials } from "@/lib/utils";
import { useOrdersStore } from "@/stores/orders/orders-store";

export function NavUser() {
  const { isMobile } = useSidebar();
  const router = useRouter();
  const [user, setUser] = useState<AuthUser | null>(null);
  const reloadDemoData = useOrdersStore((s) => s.reloadDemoData);

  useEffect(() => {
    setUser(getAuthUser());
  }, []);

  const handleLogout = () => {
    logout();
    router.replace("/login");
  };

  const handleReloadDemo = () => {
    reloadDemoData();
    toast.success("Demo data reloaded", {
      description: "All orders have been reset to mock defaults.",
      duration: 3000,
    });
    router.refresh();
  };

  const displayUser = user ?? { name: "…", email: "", role: "foh" as const, avatar: "" };
  const isAdmin = user?.role === "admin";

  return (
    <SidebarMenu>
      <SidebarMenuItem>
        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <SidebarMenuButton
              size="lg"
              className="data-[state=open]:bg-sidebar-accent data-[state=open]:text-sidebar-accent-foreground"
            >
              <Avatar className="h-8 w-8 rounded-lg grayscale">
                <AvatarImage src={displayUser.avatar || undefined} alt={displayUser.name} />
                <AvatarFallback className="rounded-lg">{getInitials(displayUser.name)}</AvatarFallback>
              </Avatar>
              <div className="grid flex-1 text-left text-sm leading-tight">
                <span className="truncate font-medium">{displayUser.name}</span>
                <span className="truncate text-muted-foreground text-xs">{displayUser.email}</span>
              </div>
              <EllipsisVertical className="ml-auto size-4" />
            </SidebarMenuButton>
          </DropdownMenuTrigger>
          <DropdownMenuContent
            className="w-(--radix-dropdown-menu-trigger-width) min-w-56 rounded-lg"
            side={isMobile ? "bottom" : "right"}
            align="end"
            sideOffset={4}
          >
            <DropdownMenuLabel className="p-0 font-normal">
              <div className="flex items-center gap-2 px-1 py-1.5 text-left text-sm">
                <Avatar className="h-8 w-8 rounded-lg">
                  <AvatarImage src={displayUser.avatar || undefined} alt={displayUser.name} />
                  <AvatarFallback className="rounded-lg">{getInitials(displayUser.name)}</AvatarFallback>
                </Avatar>
                <div className="grid flex-1 text-left text-sm leading-tight">
                  <div className="flex items-center gap-1.5">
                    <span className="truncate font-medium">{displayUser.name}</span>
                    {user && (
                      <span
                        className={`inline-flex shrink-0 items-center rounded border px-1.5 py-0 font-medium text-[10px] ${ROLE_COLORS[user.role]}`}
                      >
                        {ROLE_LABELS[user.role]}
                      </span>
                    )}
                  </div>
                  <span className="truncate text-muted-foreground text-xs">{displayUser.email}</span>
                </div>
              </div>
            </DropdownMenuLabel>
            <DropdownMenuSeparator />

            {isAdmin && (
              <>
                <DropdownMenuItem onClick={handleReloadDemo} className="gap-2 text-amber-600 focus:text-amber-600">
                  <RefreshCw className="size-4" />
                  Reload Demo Data
                </DropdownMenuItem>
                <DropdownMenuSeparator />
              </>
            )}

            <DropdownMenuItem onClick={handleLogout} className="text-destructive focus:text-destructive">
              <LogOut />
              Log out
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </SidebarMenuItem>
    </SidebarMenu>
  );
}