import { useState, type FormEvent } from "react";
import { useNavigate } from "react-router-dom";
import { Wallet, ArrowRight, AlertCircle } from "lucide-react";
import { login } from "@/lib/api";
import { useAuth } from "@/AuthContext";
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";

export default function LoginPage() {
  const [username, setUsername] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const navigate = useNavigate();
  const { setAuthenticated } = useAuth();

  const handleSubmit = async (e: FormEvent) => {
    e.preventDefault();
    setLoading(true);
    setError("");
    try {
      await login(username, password);
      setAuthenticated(true);
      navigate("/", { replace: true });
    } catch {
      setError("Invalid credentials");
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-background flex items-center justify-center px-4">
      <div className="w-full max-w-sm">
        <div className="flex items-center justify-center gap-2.5 mb-8">
          <div className="w-10 h-10 rounded-lg bg-primary flex items-center justify-center">
            <Wallet className="w-6 h-6 text-primary-foreground" strokeWidth={2.5} />
          </div>
          <span className="text-2xl font-bold tracking-tight" style={{ fontFamily: "var(--font-heading)" }}>
            Wealthy<span className="text-primary">Smart</span>
          </span>
        </div>

        <Card>
          <CardHeader>
            <CardTitle>Sign in</CardTitle>
          </CardHeader>
          <CardContent>
            <form onSubmit={handleSubmit} className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="username">Username</Label>
                <Input
                  id="username"
                  type="text"
                  value={username}
                  onChange={(e) => setUsername(e.target.value)}
                  placeholder="Enter username"
                  autoFocus
                  className="h-10"
                />
              </div>
              <div className="space-y-2">
                <Label htmlFor="password">Password</Label>
                <Input
                  id="password"
                  type="password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  placeholder="Enter password"
                  className="h-10"
                />
              </div>

              {error && (
                <div className="flex items-center gap-2 text-destructive text-sm">
                  <AlertCircle className="w-4 h-4" />
                  {error}
                </div>
              )}

              <Button type="submit" disabled={loading} className="w-full h-10">
                {loading ? "Signing in..." : "Sign in"}
                {!loading && <ArrowRight className="w-4 h-4" />}
              </Button>
            </form>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}