import { useState } from "react";
import { useNavigate } from "react-router-dom";
import { api, setToken } from "@/api/client";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card";

export default function Login() {
  const navigate = useNavigate();
  const [username, setUsername] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState("");

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError("");
    try {
      const res = await api.post<{ access_token: string }>("/auth/login", {
        username,
        password,
      });
      setToken(res.access_token);
      navigate("/");
    } catch {
      setError("Invalid credentials");
    }
  };

  return (
    <div className="flex items-center justify-center min-h-screen bg-background">
      <Card className="w-full max-w-sm">
        <CardHeader>
          <CardTitle className="text-2xl text-center">Life Dashboard</CardTitle>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="username">Username</Label>
              <Input
                id="username"
                value={username}
                onChange={(e) => setUsername(e.target.value)}
                required
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor="password">Password</Label>
              <Input
                id="password"
                type="password"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                required
              />
            </div>
            {error && <p className="text-sm text-destructive">{error}</p>}
            <Button type="submit" className="w-full">
              Sign in
            </Button>
          </form>
        </CardContent>
      </Card>
    </div>
  );
}