"use client"

import { useEffect, useState } from "react"
import Link from "next/link"
import { useRouter } from "next/navigation"
import { BookOpen } from "lucide-react"
import { Button } from "@/components/ui/button"
import { useAuth } from "@/lib/auth-context"
import { toast } from "sonner"

function GoogleIcon({ className }: { className?: string }) {
  return (
    <svg className={className} viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
      <path d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 0 1-2.2 3.32v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.1z" fill="#4285F4" />
      <path d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z" fill="#34A853" />
      <path d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z" fill="#FBBC05" />
      <path d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z" fill="#EA4335" />
    </svg>
  )
}

export default function LoginPage() {
  const router = useRouter()
  const { user, loginWithGoogle } = useAuth()
  const [isSubmitting, setIsSubmitting] = useState(false)

  useEffect(() => {
    if (user) {
      router.push("/")
    }
  }, [user, router])

  const handleGoogleLogin = async () => {
    if (isSubmitting) return

    setIsSubmitting(true)
    try {
      await loginWithGoogle()
      router.push("/")
    } catch (error) {
      const message = error instanceof Error ? error.message : "Đăng nhập thất bại"
      toast.error(message)
    } finally {
      setIsSubmitting(false)
    }
  }

  return (
    <div className="flex min-h-[calc(100svh-8rem)] items-center justify-center px-4">
      <div className="w-full max-w-sm">
        <div className="mb-8 text-center">
          <Link href="/" className="inline-flex items-center gap-2 text-primary">
            <BookOpen className="h-6 w-6" />
            <span className="text-xl font-bold text-foreground">Virtus's Reader</span>
          </Link>
          <h1 className="mt-6 text-2xl font-bold text-foreground">Chao mung ban</h1>
          <p className="mt-2 text-sm text-muted-foreground">
            {"Dang nhap de luu truyen va theo doi tien do doc"}
          </p>
        </div>

        <div className="rounded-xl border border-border bg-card p-6">
          <Button
            variant="outline"
            className="flex h-12 w-full items-center justify-center gap-3 text-sm font-medium"
            onClick={handleGoogleLogin}
            disabled={isSubmitting}
          >
            <GoogleIcon className="h-5 w-5" />
            {isSubmitting ? "Dang xu ly..." : "Dang nhap bang Google"}
          </Button>

          <div className="mt-4 text-center text-xs text-muted-foreground">
            {"Chung toi se khong bao gio chia se thong tin cua ban voi bat ky ai."}
          </div>
        </div>

        <p className="mt-6 text-center text-xs text-muted-foreground">
          {"Khi dang nhap, ban dong y voi "}
          <span className="text-primary hover:underline cursor-pointer">{"Dieu khoan su dung"}</span>
          {" va "}
          <span className="text-primary hover:underline cursor-pointer">{"Chinh sach bao mat"}</span>
          {" cua chung toi."}
        </p>
      </div>
    </div>
  )
}