"use client";

import { BadgeCheck, Bird, Bomb, ChevronsUpDown, FileTextIcon, LogOut, Users2 } from "lucide-react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { useState } from "react";

import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuGroup,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import {
  SidebarMenu,
  SidebarMenuButton,
  SidebarMenuItem,
  useSidebar,
} from "@/components/ui/sidebar";
import type { User } from "@/payload-types";
import { ImpersonationModal } from "@/components/frontend/impersonation/ImpersonationModal";
import { getImpersonationUsers } from "@/app/(frontend)/impersonate/actions";

export function NavUser({
  user,
  showCallsign = false,
  canImpersonate = false,
}: {
  user: {
    displayName: string;
    username: string;
    avatar: string;
  };
  showCallsign?: boolean;
  canImpersonate?: boolean;
}) {
  const { isMobile } = useSidebar();
  const router = useRouter();
  const [loggingOut, setLoggingOut] = useState(false);
  const [showImpersonationModal, setShowImpersonationModal] = useState(false);
  const [impersonationUsers, setImpersonationUsers] = useState<any[]>([]);
  const [loadingImpersonationUsers, setLoadingImpersonationUsers] = useState(false);

  const primaryLine = showCallsign ? user.username : user.displayName;
  const secondaryLine = showCallsign ? user.displayName : user.username;

  const handleLogout = async () => {
    setLoggingOut(true);
    try {
      await fetch("/api/users/logout", { method: "POST" });
    } catch {
      // ignore network errors; redirect anyway
    } finally {
      setLoggingOut(false);
    }
    router.push("/");
    router.refresh();
  };

  const handleOpenImpersonationModal = async () => {
    setLoadingImpersonationUsers(true);
    try {
      const users = await getImpersonationUsers();
      setImpersonationUsers(users);
    } catch (error) {
      console.error("Failed to load impersonation users:", error);
    } finally {
      setLoadingImpersonationUsers(false);
    }
    setShowImpersonationModal(true);
  };

  const handleImpersonationStarted = async () => {
    router.push("/");
    router.refresh();
  };

  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">
                <AvatarImage src={user.avatar} alt={user.displayName} />
                <AvatarFallback className="rounded-lg">CN</AvatarFallback>
              </Avatar>
              <div className="grid flex-1 text-left text-sm leading-tight">
                <span className="truncate font-medium">{primaryLine}</span>
                <span className="truncate text-xs text-muted-foreground">{secondaryLine}</span>
              </div>
              <ChevronsUpDown 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={user.avatar} alt={user.displayName} />
                  <AvatarFallback className="rounded-lg">
                    {user.username.substring(0, 2).toUpperCase()}
                  </AvatarFallback>
                </Avatar>
                <div className="grid flex-1 text-left text-sm leading-tight">
                  <span className="truncate font-medium">{primaryLine}</span>
                  <span className="truncate text-xs">{secondaryLine}</span>
                </div>
              </div>
            </DropdownMenuLabel>
            <DropdownMenuSeparator />
            <DropdownMenuGroup>
              <DropdownMenuItem asChild>
                <Link href={`/profile/${user.username}`}>
                  <FileTextIcon />
                  Service Record
                </Link>
              </DropdownMenuItem>
              <DropdownMenuItem asChild>
                <Link href="/flappy">
                  <Bird />
                  Flight Simulator
                </Link>
              </DropdownMenuItem>
              <DropdownMenuItem asChild>
                <Link href="/eod">
                  <Bomb />
                  Minefield Clearance
                </Link>
              </DropdownMenuItem>
            </DropdownMenuGroup>
            <DropdownMenuSeparator />
            <DropdownMenuGroup>
              <DropdownMenuItem asChild>
                <Link href="/account">
                  <BadgeCheck />
                  Account
                </Link>
              </DropdownMenuItem>
              {canImpersonate && (
                <DropdownMenuItem onClick={handleOpenImpersonationModal}>
                  <Users2 />
                  Impersonate
                </DropdownMenuItem>
              )}
            </DropdownMenuGroup>
            <DropdownMenuSeparator />
            <DropdownMenuItem onSelect={() => handleLogout()}>
              <LogOut />
              {loggingOut ? "Logging out..." : "Log out"}
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </SidebarMenuItem>
      <ImpersonationModal
        open={showImpersonationModal}
        onOpenChange={setShowImpersonationModal}
        users={impersonationUsers}
        onStart={handleImpersonationStarted}
      />
    </SidebarMenu>
  );
}