import { useState } from "react"
import { Link, useNavigate } from "react-router-dom"
import { useTranslation } from "react-i18next"
import { useAuth } from "@/hooks/useAuth"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Separator } from "@/components/ui/separator"

export default function LoginPage() {
  const { t } = useTranslation()
  const { signIn, signInWithOAuth } = useAuth()
  const navigate = useNavigate()
  const [email, setEmail] = useState("")
  const [password, setPassword] = useState("")
  const [error, setError] = useState("")
  const [loading, setLoading] = useState(false)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    setError("")
    setLoading(true)
    try {
      await signIn(email, password)
      navigate("/")
    } catch (err) {
      setError(err instanceof Error ? err.message : t("common.error"))
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="flex min-h-screen items-center justify-center bg-muted/60 p-4">
      <Card className="w-full max-w-sm border-t-4 border-t-primary shadow-lg">
        <CardHeader className="text-center pb-4">
          <img src="/favicon.svg" alt="" className="mx-auto mb-3 size-10" aria-hidden="true" />
          <CardTitle className="text-2xl">{t("app.title")}</CardTitle>
          <p className="text-sm text-muted-foreground">{t("auth.loginSubtitle")}</p>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="email">{t("auth.email")}</Label>
              <Input
                id="email"
                type="email"
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                required
                autoComplete="email"
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="password">{t("auth.password")}</Label>
              <Input
                id="password"
                type="password"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                required
                autoComplete="current-password"
              />
            </div>
            {error && (
              <p className="text-sm text-destructive">{error}</p>
            )}
            <Button type="submit" className="w-full" disabled={loading}>
              {t("auth.login")}
            </Button>
          </form>

          <div className="mt-4">
            <div className="relative">
              <Separator />
              <span className="absolute left-1/2 top-1/2 -translate-x-1/2 -translate-y-1/2 bg-card px-2 text-xs text-muted-foreground">
                {t("auth.orContinueWith")}
              </span>
            </div>
            <div className="mt-4 flex gap-2">
              <Button
                variant="outline"
                className="flex-1 gap-2"
                onClick={() => signInWithOAuth("google")}
              >
                <svg className="size-4" viewBox="0 0 24 24" aria-hidden="true">
                  <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 3.27-4.74 3.27-8.1z" 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>
                Google
              </Button>
              <Button
                variant="outline"
                className="flex-1 gap-2"
                onClick={() => signInWithOAuth("github")}
              >
                <svg className="size-4" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true">
                  <path d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0 1 12 6.844a9.59 9.59 0 0 1 2.504.337c1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.202 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.943.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.02 10.02 0 0 0 22 12.017C22 6.484 17.522 2 12 2z"/>
                </svg>
                GitHub
              </Button>
            </div>
          </div>

          <p className="mt-4 text-center text-sm text-muted-foreground">
            {t("auth.noAccount")}{" "}
            <Link to="/register" className="text-primary underline">
              {t("auth.register")}
            </Link>
          </p>
        </CardContent>
      </Card>
    </div>
  )
}
