"use client"

import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Badge } from "@/components/ui/badge"
import { Button } from "@/components/ui/button"
import { Separator } from "@/components/ui/separator"
import { Languages, Menu, X } from "lucide-react"
import Link from "next/link"
import { useState } from "react"
import { usePathname } from "next/navigation"
import { cn } from "@/lib/utils"
import {
  LayoutDashboard,
  Key,
  BookText,
  CreditCard,
  ChevronLeft,
} from "lucide-react"

const navItems = [
  { label: "Overview", href: "/dashboard", icon: LayoutDashboard },
  { label: "API Keys", href: "/dashboard/api-keys", icon: Key },
  { label: "Glossaries & Context", href: "/dashboard/glossaries", icon: BookText },
  { label: "Billing", href: "/dashboard/billing", icon: CreditCard },
]

export function DashboardHeader() {
  const [mobileOpen, setMobileOpen] = useState(false)
  const pathname = usePathname()

  return (
    <>
      <header className="flex h-14 shrink-0 items-center justify-between border-b border-border bg-card px-4 lg:px-6">
        {/* Mobile menu button */}
        <Button
          variant="ghost"
          size="icon-sm"
          className="lg:hidden"
          onClick={() => setMobileOpen(!mobileOpen)}
          aria-label="Toggle menu"
        >
          {mobileOpen ? <X className="size-4" /> : <Menu className="size-4" />}
        </Button>

        {/* Mobile brand */}
        <div className="flex items-center gap-2 lg:hidden">
          <div className="flex size-6 items-center justify-center rounded-md bg-foreground">
            <Languages className="size-3 text-background" />
          </div>
          <span className="text-sm font-semibold text-foreground">Office Translator</span>
        </div>

        {/* Page title - desktop */}
        <div className="hidden items-center gap-3 lg:flex">
          <h1 className="text-sm font-semibold text-foreground">Dashboard</h1>
          <Separator orientation="vertical" className="h-4" />
          <span className="text-sm text-muted-foreground">Manage your API and translation settings</span>
        </div>

        {/* Right side */}
        <div className="flex items-center gap-3">
          <Badge
            variant="secondary"
            className="border border-accent/20 bg-accent/10 text-accent"
          >
            Pro Plan
          </Badge>
          <Avatar className="size-8">
            <AvatarFallback className="bg-accent text-accent-foreground text-xs font-semibold">
              JD
            </AvatarFallback>
          </Avatar>
        </div>
      </header>

      {/* Mobile navigation drawer */}
      {mobileOpen && (
        <div className="border-b border-border bg-card px-4 py-3 lg:hidden">
          <nav className="flex flex-col gap-1">
            {navItems.map((item) => {
              const isActive = pathname === item.href
              return (
                <Link
                  key={item.href}
                  href={item.href}
                  onClick={() => setMobileOpen(false)}
                  className={cn(
                    "flex items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium transition-colors",
                    isActive
                      ? "bg-secondary text-foreground"
                      : "text-muted-foreground hover:bg-secondary/60 hover:text-foreground"
                  )}
                >
                  <item.icon className="size-4 shrink-0" />
                  {item.label}
                </Link>
              )
            })}
            <Separator className="my-2" />
            <Link
              href="/"
              className="flex items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium text-muted-foreground hover:bg-secondary/60 hover:text-foreground"
            >
              <ChevronLeft className="size-4 shrink-0" />
              Back to home
            </Link>
          </nav>
        </div>
      )}
    </>
  )
}
