"use client"

import {
  BadgeCheck,
  Bell,
  ChevronsUpDown,
  CreditCard,
  LogOut,
  Sparkles,
  Moon,
  Sun,
  MonitorCog,
} from "lucide-react"
import { useEffect, 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"

export function NavUser({
  user,
}: {
  user: {
    name: string
    email: string
    avatar: string
  }
}) {
  const { isMobile } = useSidebar()
  const [theme, setTheme] = useState<"light" | "dark" | "system">("system")

  useEffect(() => {
    if (typeof window === "undefined") return
    const saved = (localStorage.getItem("theme") as "light" | "dark" | "system") || "system"
    setTheme(saved)
    applyTheme(saved)
  }, [])

  useEffect(() => {
    if (typeof window === "undefined") return
    if (theme !== "system") return
    const media = window.matchMedia("(prefers-color-scheme: dark)")
    const listener = () => applyTheme("system")
    media.addEventListener("change", listener)
    return () => media.removeEventListener("change", listener)
  }, [theme])

  const applyTheme = (value: "light" | "dark" | "system") => {
    const resolved =
      value === "system"
        ? (window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light")
        : value
    const root = document.documentElement
    root.classList.toggle("dark", resolved === "dark")
    localStorage.setItem("theme", value)
  }

  const handleTheme = (value: "light" | "dark" | "system") => {
    setTheme(value)
    if (typeof window !== "undefined") {
      applyTheme(value)
    }
  }

  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.name} />
                <AvatarFallback className="rounded-lg">CN</AvatarFallback>
              </Avatar>
              <div className="grid flex-1 text-left text-sm leading-tight">
                <span className="truncate font-medium">{user.name}</span>
                <span className="truncate text-xs">{user.email}</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.name} />
                  <AvatarFallback className="rounded-lg">CN</AvatarFallback>
                </Avatar>
                <div className="grid flex-1 text-left text-sm leading-tight">
                  <span className="truncate font-medium">{user.name}</span>
                  <span className="truncate text-xs">{user.email}</span>
                </div>
              </div>
            </DropdownMenuLabel>
            <DropdownMenuSeparator />
            <DropdownMenuGroup>
              <DropdownMenuItem>
                <Sparkles />
                Upgrade to Pro
              </DropdownMenuItem>
            </DropdownMenuGroup>
            <DropdownMenuSeparator />
            <DropdownMenuGroup>
              <DropdownMenuLabel>Theme</DropdownMenuLabel>
              <DropdownMenuItem
                className={theme === "light" ? "bg-muted" : ""}
                onClick={() => handleTheme("light")}
              >
                <Sun className="mr-2" />
                Light
              </DropdownMenuItem>
              <DropdownMenuItem
                className={theme === "dark" ? "bg-muted" : ""}
                onClick={() => handleTheme("dark")}
              >
                <Moon className="mr-2" />
                Dark
              </DropdownMenuItem>
              <DropdownMenuItem
                className={theme === "system" ? "bg-muted" : ""}
                onClick={() => handleTheme("system")}
              >
                <MonitorCog className="mr-2" />
                System
              </DropdownMenuItem>
            </DropdownMenuGroup>
            <DropdownMenuSeparator />
            <DropdownMenuGroup>
              <DropdownMenuItem>
                <BadgeCheck />
                Account
              </DropdownMenuItem>
              <DropdownMenuItem>
                <CreditCard />
                Billing
              </DropdownMenuItem>
              <DropdownMenuItem>
                <Bell />
                Notifications
              </DropdownMenuItem>
            </DropdownMenuGroup>
            <DropdownMenuSeparator />
            <DropdownMenuItem>
              <LogOut />
              Log out
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </SidebarMenuItem>
    </SidebarMenu>
  )
}