'use client'

import Link from 'next/link'
import { usePathname } from 'next/navigation'
import { useState, type ReactNode } from 'react'
import { Menu, LayoutDashboard, Package, ArrowLeftRight, Plus, KeyRound, PackageSearch, ShoppingCart, LogOut, Users } from 'lucide-react'
import type { AuthUser } from '@localiztoi/shared'

import { Button } from '@/components/ui/button'
import {
  Sheet,
  SheetContent,
  SheetTrigger,
  SheetTitle,
} from '@/components/ui/sheet'
import { cn } from '@/lib/utils'

const isActivePath = (pathname: string, href: string) => {
  if (href === '/admin') {
    return pathname === '/admin'
  }
  return pathname === href || pathname.startsWith(`${href}/`)
}

const navLinks = [
  { href: '/admin', label: 'Dashboard', icon: LayoutDashboard },
  { href: '/admin/amazon-orders', label: 'Amazon', icon: ShoppingCart },
  { href: '/admin/orders', label: 'Commandes', icon: Package },
  { href: '/admin/sku-mappings', label: 'Correspondances SKU', icon: ArrowLeftRight },
  { href: '/admin/axonaut-stock', label: 'Stock Axonaut', icon: PackageSearch },
  { href: '/admin/api-keys', label: 'Tokens API', icon: KeyRound },
  { href: '/admin/users', label: 'Utilisateurs', icon: Users },
]

const NavContent = ({
  pathname,
  onNavigate,
}: {
  pathname: string
  onNavigate?: () => void
}) => (
  <nav className="flex flex-col gap-1 p-3">
    {navLinks.map(({ href, label, icon: Icon }) => {
      const active = isActivePath(pathname, href)
      return (
        <Button
          key={href}
          variant={active ? 'secondary' : 'ghost'}
          className={cn('w-full justify-start h-11 gap-3', active && 'font-semibold')}
          asChild
        >
          <Link href={href} onClick={onNavigate}>
            <Icon className="h-4 w-4" />
            {label}
          </Link>
        </Button>
      )
    })}
  </nav>
)

export const AdminShell = ({ children, user, onLogout }: { children: ReactNode; user: AuthUser; onLogout: () => void }) => {
  const pathname = usePathname()
  const [mobileMenuOpen, setMobileMenuOpen] = useState(false)

  // Pages en mode plein écran (sans header ni sidebar)
  const isFullscreen = pathname.match(/\/admin\/orders\/[^/]+\/scan(-tracking)?$/)

  if (isFullscreen) {
    return (
      <div className="h-screen overflow-hidden">
        <main className="h-full overflow-y-auto p-4">
          {children}
        </main>
      </div>
    )
  }

  return (
    <div className="flex h-screen overflow-hidden">
      {/* Desktop sidebar */}
      <aside className="hidden md:flex md:flex-col w-64 border-r bg-background shrink-0">
        <div className="p-4 border-b">
          <p className="font-bold text-base tracking-tight">Localiztoi Stock</p>
          <p className="text-xs text-muted-foreground">Console Admin</p>
        </div>

        <div className="flex-1 overflow-y-auto">
          <NavContent pathname={pathname} />
        </div>

        <div className="p-3 border-t">
          <div className="flex items-center justify-between gap-2">
            <div className="min-w-0">
              <p className="text-sm font-medium truncate">{user.displayName}</p>
              <p className="text-xs text-muted-foreground truncate">{user.username}</p>
            </div>
            <Button variant="ghost" size="icon" className="shrink-0 text-muted-foreground" onClick={onLogout} title="Déconnexion">
              <LogOut className="h-4 w-4" />
            </Button>
          </div>
        </div>
      </aside>

      {/* Main area */}
      <div className="flex flex-col flex-1 overflow-hidden">
        {/* Header */}
        <header className="h-14 border-b bg-background flex items-center justify-between px-4 shrink-0 sticky top-0 z-10">
          <div className="flex items-center gap-3">
            {/* Mobile hamburger */}
            <Sheet open={mobileMenuOpen} onOpenChange={setMobileMenuOpen}>
              <SheetTrigger asChild>
                <Button variant="ghost" size="icon" className="md:hidden">
                  <Menu className="h-5 w-5" />
                  <span className="sr-only">Ouvrir le menu</span>
                </Button>
              </SheetTrigger>
              <SheetContent side="left" className="w-64 p-0 flex flex-col">
                <SheetTitle className="p-4 border-b font-bold text-base tracking-tight">
                  Localiztoi Stock
                </SheetTitle>
                <div className="flex-1 overflow-y-auto">
                  <NavContent
                    pathname={pathname}
                    onNavigate={() => setMobileMenuOpen(false)}
                  />
                </div>
                <div className="p-3 border-t">
                  <div className="flex items-center justify-between gap-2">
                    <div className="min-w-0">
                      <p className="text-sm font-medium truncate">{user.displayName}</p>
                      <p className="text-xs text-muted-foreground truncate">{user.username}</p>
                    </div>
                    <Button variant="ghost" size="icon" className="shrink-0 text-muted-foreground" onClick={() => { setMobileMenuOpen(false); onLogout() }} title="Déconnexion">
                      <LogOut className="h-4 w-4" />
                    </Button>
                  </div>
                </div>
              </SheetContent>
            </Sheet>

            <span className="font-semibold md:hidden">Localiztoi</span>
            <span className="hidden md:block text-sm text-muted-foreground">{pathname}</span>
          </div>

          <Button size="sm" asChild>
            <Link href="/admin/orders/new">
              <Plus className="h-4 w-4 mr-1" />
              <span className="hidden sm:inline">Créer une commande</span>
              <span className="sm:hidden">Nouvelle</span>
            </Link>
          </Button>
        </header>

        {/* Page content */}
        <main className="flex-1 overflow-y-auto p-4 md:p-6">
          {children}
        </main>
      </div>
    </div>
  )
}