import { FormEvent, useState, useCallback } from "react";
import { Eye, EyeOff } from "lucide-react";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { apiBaseUrl } from "@/lib/api-client";
import { isTauri, openUrl } from "@/lib/tauri";

type AuthFormProps = {
  mode: "login" | "register";
  isSubmitting: boolean;
  error: string | null;
  googleOAuthEnabled: boolean;
  onSubmit: (payload: {
    name?: string;
    email: string;
    password: string;
  }) => Promise<unknown>;
  onFieldChange?: () => void;
};

export function AuthForm({
  mode,
  isSubmitting,
  error,
  googleOAuthEnabled,
  onSubmit,
  onFieldChange,
}: AuthFormProps) {
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [showPassword, setShowPassword] = useState(false);

  async function handleSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    await onSubmit({ name, email, password });
  }

  const handleGoogleLogin = useCallback(async (e: React.MouseEvent) => {
    e.preventDefault();
    const platform = isTauri() ? "tauri" : "web";
    const googleUrl = `${apiBaseUrl}/api/v1/auth/google?platform=${platform}`;
    await openUrl(googleUrl);
  }, []);

  return (
    <Card className="mx-auto w-full max-w-md bg-transparent border-none shadow-none">
      <CardHeader className="text-center space-y-2">
        <CardTitle className="text-2xl font-bold text-emerald-900">
          {mode === "login" ? "Masuk Akun ZeaVis Edu" : "Buat akun ZeaVis Edu"}
        </CardTitle>
        <CardDescription className="text-sm text-emerald-800/80">
          {mode === "login"
            ? "Masuk untuk menyimpan diagnosis dan mengikuti review pakar."
            : "Daftar untuk menyimpan diagnosis dan mengikuti review pakar."}
        </CardDescription>
      </CardHeader>
      <CardContent>
        <form className="space-y-4" onSubmit={handleSubmit}>
          {mode === "register" && (
            <div className="space-y-2">
              <Label htmlFor="name">Nama</Label>
              <Input
                id="name"
                placeholder="Masukkan nama Anda"
                value={name}
                onChange={(event) => {
                  setName(event.target.value);
                  onFieldChange?.();
                }}
                required
              />
            </div>
          )}
          <div className="space-y-2">
            <Label htmlFor="email">Email</Label>
            <Input
              id="email"
              type="email"
              placeholder="Masukkan email Anda"
              value={email}
              onChange={(event) => {
                setEmail(event.target.value);
                onFieldChange?.();
              }}
              required
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="password">Password</Label>
            <div className="relative">
              <Input
                id="password"
                type={showPassword ? "text" : "password"}
                placeholder="Password minimal 8 karakter"
                minLength={8}
                value={password}
                onChange={(event) => {
                  setPassword(event.target.value);
                  onFieldChange?.();
                }}
                required
              />
              <button
                type="button"
                className="absolute right-3 top-1/2 -translate-y-1/2 text-muted-foreground focus:outline-none"
                onClick={() => setShowPassword(!showPassword)}
              >
                {showPassword ? (
                  <EyeOff className="h-4 w-4" />
                ) : (
                  <Eye className="h-4 w-4" />
                )}
              </button>
            </div>
          </div>
          {error && (
            <p className="text-sm text-red-600" role="alert">
              {error}
            </p>
          )}
          <Button className="w-full" type="submit" disabled={isSubmitting}>
            {isSubmitting
              ? "Memproses..."
              : mode === "login"
                ? "Masuk"
                : "Daftar"}
          </Button>
        </form>
        {googleOAuthEnabled && (
          <Button
            className="mt-3 w-full flex items-center justify-center gap-2.5"
            variant="outline"
            onClick={handleGoogleLogin}
            type="button"
          >
            <svg viewBox="0 0 24 24" className="h-5 w-5" aria-hidden="true">
              <path
                fill="#4285F4"
                d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 0 1-2.2 3.32v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.1z"
              />
              <path
                fill="#34A853"
                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"
              />
              <path
                fill="#FBBC05"
                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"
              />
              <path
                fill="#EA4335"
                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"
              />
              <path fill="none" d="M1 1h22v22H1z" />
            </svg>
            Masuk dengan Google
          </Button>
        )}
      </CardContent>
    </Card>
  );
}
