import { useState } from "react";
import { toast } from "sonner";
import { Link, useNavigate } from "react-router-dom";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Separator } from "@/components/ui/separator";
import { Layers, CheckCircle2 } from "lucide-react";

export default function LoginPage() {
  const navigate = useNavigate();
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [success, setSuccess] = useState(false);

  return (
    <div className="min-h-screen bg-gradient-to-br from-slate-950 via-indigo-950 to-slate-900 flex items-center justify-center p-6">
      <div className="w-full max-w-md">
        {/* Logo */}
        <Link to="/" className="flex items-center justify-center gap-2 mb-8">
          <div className="h-10 w-10 rounded-xl bg-gradient-to-br from-indigo-500 to-cyan-500 flex items-center justify-center">
            <Layers className="h-5 w-5 text-white" />
          </div>
          <span className="text-2xl font-bold text-white tracking-tight">Nexus</span>
        </Link>

        <Card className="border-slate-800 bg-slate-900/50 backdrop-blur-xl shadow-2xl">
          <CardContent className="p-8">
            <div className="text-center mb-8">
              <h1 className="text-2xl font-bold text-white">Welcome back</h1>
              <p className="text-slate-400 mt-1 text-sm">Sign in to your account to continue</p>
            </div>

            {success && (
              <div className="mb-6 flex items-center gap-2 rounded-lg bg-green-500/10 border border-green-500/20 px-4 py-3 text-sm text-green-400">
                <CheckCircle2 className="h-4 w-4 flex-shrink-0" /> Sign in successful! Redirecting...
              </div>
            )}

            <form onSubmit={(e) => { e.preventDefault(); setSuccess(true); toast.success("Welcome back!"); setTimeout(() => navigate("/dashboard"), 1500); }} className="space-y-4">
              <div>
                <Label htmlFor="email" className="text-slate-300 text-sm">Email</Label>
                <Input
                  id="email"
                  type="email"
                  required
                  placeholder="you@company.com"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  className="mt-1.5 bg-slate-800/50 border-slate-700 text-white placeholder:text-slate-500 focus:border-indigo-500 focus:ring-indigo-500/20"
                />
              </div>
              <div>
                <div className="flex items-center justify-between">
                  <Label htmlFor="password" className="text-slate-300 text-sm">Password</Label>
                  <Link to="/forgot-password" className="text-xs text-indigo-400 hover:text-indigo-300">Forgot password?</Link>
                </div>
                <Input
                  id="password"
                  type="password"
                  required
                  placeholder="Enter your password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  className="mt-1.5 bg-slate-800/50 border-slate-700 text-white placeholder:text-slate-500 focus:border-indigo-500 focus:ring-indigo-500/20"
                />
              </div>

              <Button type="submit" className="active:scale-[0.98] w-full bg-indigo-600 hover:bg-indigo-500 text-white rounded-lg mt-2 font-semibold">
                Sign In
              </Button>
            </form>

            <div className="relative my-6">
              <Separator className="bg-slate-700" />
              <span className="absolute left-1/2 top-1/2 -translate-x-1/2 -translate-y-1/2 bg-slate-900 px-3 text-xs text-slate-500">or</span>
            </div>

            <Button variant="outline" className="active:scale-[0.98] w-full border-slate-700 text-slate-300 hover:bg-slate-800 hover:text-white rounded-lg">
              <svg className="mr-2 h-4 w-4" viewBox="0 0 24 24"><path d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 01-2.2 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>
              Sign in with Google
            </Button>

            <p className="mt-6 text-center text-sm text-slate-400">
              Don't have an account?{" "}
              <Link to="/signup" className="text-indigo-400 hover:text-indigo-300 font-medium">Sign up</Link>
            </p>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}