import { createFileRoute, useNavigate, Link } from "@tanstack/react-router";
import { useEffect, useState } from "react";
import { useAuth } from "@/lib/auth";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Scale, Loader2, ShieldCheck } from "lucide-react";
import { toast } from "sonner";

export const Route = createFileRoute("/login")({
  component: LoginPage,
});

function LoginPage() {
  const { signIn, session, loading } = useAuth();
  const navigate = useNavigate();
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [submitting, setSubmitting] = useState(false);

  useEffect(() => {
    if (!loading && session) navigate({ to: "/" });
  }, [loading, session, navigate]);

  const onSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setSubmitting(true);
    const { error } = await signIn(email.trim(), password);
    setSubmitting(false);
    if (error) {
      toast.error("Sign-in failed", { description: error });
    } else {
      navigate({ to: "/" });
    }
  };

  return (
    <div className="min-h-screen grid lg:grid-cols-2 bg-background">
      {/* Brand panel */}
      <div className="hidden lg:flex flex-col justify-between p-12 bg-sidebar text-sidebar-foreground">
        <div className="flex items-center gap-3">
          <div className="h-10 w-10 rounded-md bg-sidebar-primary flex items-center justify-center">
            <Scale className="h-5 w-5 text-sidebar-primary-foreground" />
          </div>
          <div>
            <div className="font-serif text-xl">Stage Law Firm, PLLC</div>
            <div className="text-xs uppercase tracking-widest text-sidebar-foreground/60">Law Firm Suite</div>
          </div>
        </div>

        <div className="max-w-md">
          <h2 className="font-serif text-4xl leading-tight mb-4">
            Practice management, built for the discipline of law.
          </h2>
          <p className="text-sidebar-foreground/70 leading-relaxed">
            Cases, clients, documents, time, and billing — secured behind authenticated access and row-level data
            protection. Designed for HOA-focused firms and beyond.
          </p>
        </div>

        <div className="flex items-center gap-2 text-xs text-sidebar-foreground/60">
          <ShieldCheck className="h-4 w-4" />
          Encrypted in transit · Role-based access · Audit-ready
        </div>
      </div>

      {/* Form */}
      <div className="flex items-center justify-center p-6">
        <Card className="w-full max-w-md border-border/60 shadow-sm">
          <CardHeader className="space-y-2">
            <div className="lg:hidden flex items-center gap-2 mb-2">
              <Scale className="h-5 w-5 text-primary" />
              <span className="font-serif text-lg">Counsel</span>
            </div>
            <CardTitle className="font-serif text-2xl">Sign in</CardTitle>
            <CardDescription>Restricted access. Contact your administrator for credentials.</CardDescription>
          </CardHeader>
          <CardContent>
            <form onSubmit={onSubmit} className="space-y-4">
              <div className="space-y-2">
                <Label htmlFor="email">Email</Label>
                <Input
                  id="email"
                  type="email"
                  autoComplete="email"
                  required
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  placeholder="attorney@firm.com"
                />
              </div>
              <div className="space-y-2">
                <Label htmlFor="password">Password</Label>
                <Input
                  id="password"
                  type="password"
                  autoComplete="current-password"
                  required
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                />
              </div>
              <Button type="submit" className="w-full" disabled={submitting}>
                {submitting && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                Sign in
              </Button>
              <p className="text-xs text-muted-foreground text-center">
                First time setting up the firm?{" "}
                <Link to="/setup" className="text-primary underline-offset-4 hover:underline">
                  Create the founding admin account
                </Link>
              </p>
            </form>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}