"use client";

import Link from "next/link";
import { useActionState, useState } from "react";
import { FlaskConical, Loader2, Stethoscope } from "lucide-react";

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 { Logo } from "@/components/logo";
import { cn } from "@/lib/utils";
import { signInAction } from "@/lib/appwrite/auth-actions";
import { initialAuthState } from "@/lib/appwrite/auth-types";

type Kind = "clinic" | "lab";

export function LoginForm1({
  className,
  inviteCode,
  ...props
}: React.ComponentProps<"div"> & { inviteCode?: string }) {
  const [kind, setKind] = useState<Kind>("clinic");
  const [state, formAction, isPending] = useActionState(signInAction, initialAuthState);

  return (
    <div className={cn("flex flex-col gap-6", className)} {...props}>
      <Card className="overflow-hidden p-0">
        <CardContent className="grid p-0 md:grid-cols-2">
          <form action={formAction} className="p-6 md:p-10">
            {inviteCode && <input type="hidden" name="inviteCode" value={inviteCode} />}
            <input type="hidden" name="kind" value={kind} />
            <div className="flex flex-col gap-6">
              <div className="flex justify-center">
                <Link href="/" className="flex items-center gap-2 font-medium">
                  <div className="bg-primary text-primary-foreground flex size-9 items-center justify-center rounded-md">
                    <Logo size={22} />
                  </div>
                  <span className="text-xl font-semibold">DLS</span>
                </Link>
              </div>

              {inviteCode && (
                <p className="text-muted-foreground rounded-md border bg-muted/50 px-3 py-2 text-center text-xs">
                  Davete katılmak için giriş yapın.
                </p>
              )}

              <div className="flex flex-col items-center text-center">
                <h1 className="text-2xl font-bold tracking-tight">Tekrar hoş geldiniz</h1>
                <p className="text-muted-foreground text-sm text-balance mt-1">
                  Hesabınıza giriş yapın
                </p>
              </div>

              {!inviteCode && (
                <KindPill value={kind} onChange={setKind} disabled={isPending} />
              )}

              <div className="grid gap-3">
                <Label htmlFor="email">Email</Label>
                <Input
                  id="email"
                  name="email"
                  type="email"
                  placeholder="ornek@firma.com"
                  autoComplete="email"
                  required
                />
              </div>

              <div className="grid gap-3">
                <div className="flex items-center">
                  <Label htmlFor="password">Şifre</Label>
                  <Link
                    href="/forgot-password"
                    className="ml-auto text-xs text-muted-foreground hover:text-foreground underline-offset-4 hover:underline"
                  >
                    Şifremi unuttum
                  </Link>
                </div>
                <Input
                  id="password"
                  name="password"
                  type="password"
                  autoComplete="current-password"
                  required
                />
              </div>

              {state.mfaRequired && (
                <div className="grid gap-2">
                  <Label htmlFor="otp">Authenticator kodu</Label>
                  <Input
                    id="otp"
                    name="otp"
                    inputMode="numeric"
                    pattern="[0-9]*"
                    maxLength={6}
                    autoComplete="one-time-code"
                    autoFocus
                    placeholder="000000"
                    className="font-mono text-lg tracking-widest"
                    required
                  />
                </div>
              )}

              {state.error && (
                <p className="text-destructive text-sm text-center" role="alert">
                  {state.error}
                </p>
              )}

              <Button type="submit" className="w-full" disabled={isPending}>
                {isPending ? (
                  <>
                    <Loader2 className="size-4 animate-spin" />
                    Giriş yapılıyor...
                  </>
                ) : (
                  "Giriş yap"
                )}
              </Button>

              <div className="text-center text-sm text-muted-foreground">
                Hesabınız yok mu?{" "}
                <Link
                  href="/sign-up"
                  className="text-foreground font-medium underline-offset-4 hover:underline"
                >
                  Hesap oluştur
                </Link>
              </div>
            </div>
          </form>

          <BrandPanel />
        </CardContent>
      </Card>

      <p className="text-muted-foreground text-center text-xs text-balance">
        Giriş yaparak{" "}
        <Link href="#" className="underline-offset-4 hover:underline">
          Kullanım Şartları
        </Link>{" "}
        ve{" "}
        <Link href="#" className="underline-offset-4 hover:underline">
          Gizlilik Politikası
        </Link>
        &apos;nı kabul etmiş olursunuz.
      </p>
    </div>
  );
}

function KindPill({
  value,
  onChange,
  disabled,
}: {
  value: Kind;
  onChange: (next: Kind) => void;
  disabled?: boolean;
}) {
  return (
    <div
      role="radiogroup"
      aria-label="Hesap türü"
      className="bg-muted text-muted-foreground inline-flex w-full items-center gap-1 rounded-full border p-1"
    >
      <PillButton
        active={value === "clinic"}
        onClick={() => onChange("clinic")}
        disabled={disabled}
      >
        <Stethoscope className="size-4" />
        Klinik
      </PillButton>
      <PillButton
        active={value === "lab"}
        onClick={() => onChange("lab")}
        disabled={disabled}
      >
        <FlaskConical className="size-4" />
        Laboratuvar
      </PillButton>
    </div>
  );
}

function PillButton({
  active,
  onClick,
  disabled,
  children,
}: {
  active: boolean;
  onClick: () => void;
  disabled?: boolean;
  children: React.ReactNode;
}) {
  return (
    <button
      type="button"
      role="radio"
      aria-checked={active}
      onClick={onClick}
      disabled={disabled}
      className={cn(
        "flex flex-1 items-center justify-center gap-1.5 rounded-full px-3 py-1.5 text-sm font-medium transition-colors",
        active
          ? "bg-background text-foreground shadow-sm"
          : "hover:text-foreground",
        disabled && "cursor-not-allowed opacity-60",
      )}
    >
      {children}
    </button>
  );
}

function BrandPanel() {
  return (
    <div className="bg-primary text-primary-foreground relative hidden md:flex md:flex-col md:justify-between overflow-hidden p-10">
      <div
        className="absolute inset-0 opacity-30"
        style={{
          backgroundImage:
            "radial-gradient(circle at 20% 20%, rgba(255,255,255,0.4) 0%, transparent 40%), radial-gradient(circle at 80% 80%, rgba(255,255,255,0.25) 0%, transparent 45%)",
        }}
        aria-hidden
      />
      <div
        className="absolute -top-24 -right-24 size-72 rounded-full bg-white/10 blur-3xl"
        aria-hidden
      />
      <div
        className="absolute -bottom-32 -left-20 size-80 rounded-full bg-black/10 blur-3xl"
        aria-hidden
      />

      <div className="relative z-10 flex items-center gap-2">
        <div className="bg-primary-foreground/15 ring-1 ring-primary-foreground/20 backdrop-blur flex size-10 items-center justify-center rounded-md">
          <Logo size={22} />
        </div>
        <span className="text-lg font-medium">DLS</span>
      </div>

      <div className="relative z-10 flex flex-col gap-3">
        <h2 className="text-3xl font-semibold leading-tight">
          Klinik ve laboratuvar tek panelde.
        </h2>
        <p className="text-primary-foreground/80 text-sm">
          İş yayınla, taranan dosyaları paylaş, protez aşamalarını adım adım takip et — finansal akışla birlikte.
        </p>
        <div className="text-primary-foreground/70 mt-4 text-xs">Kovak Yazılım tarafından</div>
      </div>
    </div>
  );
}