"use client"

import { type ReactNode, useMemo, useState } from "react"
import Image from "next/image"
import Link from "next/link"
import { usePathname, useRouter } from "next/navigation"
import { LogOut, PlusCircle } from "lucide-react"
import { toast } from "sonner"

import { Button } from "@/components/ui/button"
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
import { cn } from "@/lib/utils"
import { useAuth, signOut } from "@/lib/auth-client"

interface PortalShellProps {
  children: ReactNode
}

const navItems = [
  { label: "Meus chamados", href: "/portal/tickets" },
  { label: "Abrir chamado", href: "/portal/tickets/new", icon: PlusCircle },
]

export function PortalShell({ children }: PortalShellProps) {
  const pathname = usePathname()
  const router = useRouter()
  const { session, machineContext, machineContextError, machineContextLoading } = useAuth()
  const [isSigningOut, setIsSigningOut] = useState(false)

  const isMachineSession = session?.user.role === "machine" || Boolean(machineContext)
  const personaValue = machineContext?.persona ?? session?.user.machinePersona ?? null
  const collaboratorName = machineContext?.assignedUserName?.trim() ?? ""
  const collaboratorEmail = machineContext?.assignedUserEmail?.trim() ?? ""
  const userName = session?.user.name?.trim() ?? ""
  const userEmail = session?.user.email?.trim() ?? ""
  const displayName = collaboratorName || userName || collaboratorEmail || userEmail || "Cliente"
  const displayEmail = collaboratorEmail || userEmail
  const personaLabel = personaValue === "manager" ? "Gestor" : "Colaborador"

  const initials = useMemo(() => {
    const name = displayName || displayEmail || "Cliente"
    return name
      .split(" ")
      .slice(0, 2)
      .map((part) => part.charAt(0).toUpperCase())
      .join("")
  }, [displayName, displayEmail])

  async function handleSignOut() {
    if (isSigningOut) return
    setIsSigningOut(true)
    toast.loading("Encerrando sessão...", { id: "portal-signout" })
    try {
      await signOut()
      toast.success("Sessão encerrada", { id: "portal-signout" })
      router.replace("/login")
    } catch (error) {
      console.error(error)
      toast.error("Não foi possível encerrar a sessão", { id: "portal-signout" })
    } finally {
      setIsSigningOut(false)
    }
  }

  const isNavItemActive = (itemHref: string) => {
    if (itemHref === "/portal/tickets") {
      if (pathname === "/portal" || pathname === "/portal/tickets") return true
      if (/^\/portal\/tickets\/[A-Za-z0-9_-]+$/.test(pathname) && !pathname.endsWith("/new")) return true
      return false
    }
    return pathname === itemHref
  }

  return (
    <div className="flex min-h-screen flex-col bg-gradient-to-b from-slate-50 via-slate-50 to-white">
      <header className="border-b border-slate-200 bg-white/90 backdrop-blur">
        <div className="mx-auto flex w-full max-w-6xl flex-wrap items-center justify-between gap-4 px-6 py-4">
          <div className="flex items-center gap-3">
            <div className="flex h-12 w-12 items-center justify-center">
              <Image
                src="/logo-raven.png"
                alt="Logotipo Raven"
                width={48}
                height={48}
                className="h-12 w-12 object-contain"
                priority
              />
            </div>
            <div className="flex flex-col">
              <span className="text-sm text-neutral-500">
                Portal do Cliente
              </span>
              <span className="text-lg font-semibold text-neutral-900">Raven</span>
            </div>
          </div>
          <nav className="flex w-full flex-wrap items-center gap-2 text-sm font-medium sm:w-auto sm:justify-center">
            {navItems.map((item) => {
              const isActive = isNavItemActive(item.href)
              const Icon = item.icon
              return (
                <Link
                  key={item.href}
                  href={item.href}
                  className={cn(
                    "inline-flex w-full items-center justify-center gap-2 rounded-full px-4 py-2 transition sm:w-auto",
                    isActive
                      ? "bg-neutral-900 text-white shadow-sm"
                      : "bg-transparent text-neutral-700 hover:bg-neutral-100"
                  )}
                >
                  {Icon ? <Icon className="size-4" /> : null}
                  {item.label}
                </Link>
              )
            })}
          </nav>
          <div className="flex w-full flex-col items-start gap-3 sm:w-auto sm:flex-row sm:items-center">
            <div className="flex items-center gap-2 text-sm">
              <Avatar className="size-9 border border-slate-200">
                <AvatarImage src={session?.user.avatarUrl ?? undefined} alt={displayName ?? ""} />
                <AvatarFallback>{initials}</AvatarFallback>
              </Avatar>
              <div className="flex flex-col leading-tight">
                <span className="font-semibold text-neutral-900">{displayName}</span>
                <span className="text-xs text-neutral-500">{displayEmail || "Sem e-mail definido"}</span>
                {personaValue ? (
                  <span className="text-[10px] uppercase tracking-wide text-neutral-400">{personaLabel}</span>
                ) : null}
              </div>
            </div>
            {!isMachineSession ? (
              <Button
                size="sm"
                variant="outline"
                onClick={handleSignOut}
                disabled={isSigningOut}
                className="inline-flex items-center gap-2 self-stretch sm:self-auto"
              >
                <LogOut className="size-4" />
                Sair
              </Button>
            ) : null}
          </div>
        </div>
      </header>
      <main className="mx-auto flex w-full max-w-6xl flex-1 flex-col gap-6 px-6 py-8">
        {machineContextError ? (
          <div className="rounded-xl border border-amber-200 bg-amber-50 px-4 py-3 text-sm text-amber-700 shadow-sm">
            <p className="font-semibold text-amber-800">Não foi possível conectar ao servidor.</p>
            <p className="mt-1 text-xs text-amber-700/80">
              Verifique sua conexão com a internet e tente novamente em alguns instantes.
            </p>
          </div>
        ) : null}
        {!machineContextError && machineContextLoading ? (
          <div className="rounded-xl border border-slate-200 bg-slate-50 px-4 py-3 text-sm text-neutral-600 shadow-sm">
            Recuperando dados do colaborador vinculado...
          </div>
        ) : null}
        {children}
      </main>
      <footer className="border-t border-slate-200 bg-white/70">
        <div className="mx-auto flex w-full max-w-6xl flex-wrap items-center justify-between gap-3 px-6 py-4 text-xs text-neutral-500">
          <span>&copy; {new Date().getFullYear()} Raven — Desenvolvido pela Rever Tecnologia</span>
          <span>
            Suporte:{" "}
            <a href="mailto:suporte@rever.com.br" className="font-medium text-neutral-600 hover:text-neutral-800">
              suporte@rever.com.br
            </a>
          </span>
        </div>
      </footer>
    </div>
  )
}