"use client";

import { GoogleAuthProvider, signInWithPopup } from "firebase/auth";
import { auth } from "@/lib/firebase";
import { useAppDispatch, useAppSelector } from "@/store/hooks";
import { loginWithGoogle, clearError, setError } from "@/store/slices/authSlice";
import { LoginType } from "@/types/auth";
import { useRouter } from "next/navigation";
import { TEXT } from "@/branding";

export function GoogleLoginButton() {
  const dispatch = useAppDispatch();
  const router = useRouter();
  const isLoading = useAppSelector((s) => s.auth.isLoading);

  const handleGoogle = async () => {
    dispatch(clearError());
    try {
      const provider = new GoogleAuthProvider();
      provider.setCustomParameters({ prompt: "select_account" });
      provider.addScope("email");
      provider.addScope("profile");
      const result = await signInWithPopup(auth, provider);
      const { uid, email, displayName } = result.user;
      const res = await dispatch(
        loginWithGoogle({
          type: LoginType.Google,
          firebase_id: uid,
          email: email ?? "",
          full_name: displayName ?? "",
          mobile_number: "",
          password: "",
        }),
      );
      if (loginWithGoogle.fulfilled.match(res)) {
        router.push("/");
      }
    } catch (err: unknown) {
      const code = (err as { code?: string })?.code;
      // User closed the popup — not an error worth showing
      if (code === "auth/popup-closed-by-user" || code === "auth/cancelled-popup-request") return;
      // Any other Firebase error (misconfiguration, network, etc.) surfaces to the user
      const msg =
        code === "auth/popup-blocked"
          ? "Popup blocked. Please allow popups for this site and try again."
          : (err instanceof Error ? err.message : "Google login failed. Please try again.");
      dispatch(setError(msg));
    }
  };

  return (
    <button
      type="button"
      onClick={handleGoogle}
      disabled={isLoading}
      className="w-full flex items-center justify-center gap-3 rounded-xl py-3 px-4 text-sm font-medium transition-all duration-150 active:scale-[0.98] disabled:opacity-50"
      style={{
        background: "rgba(255,255,255,0.06)",
        border: "1px solid rgba(255,255,255,0.12)",
        color: "var(--text-muted)",
      }}
    >
      <svg width="18" height="18" viewBox="0 0 24 24">
        <path
          d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
          fill="#4285F4"
        />
        <path
          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"
          fill="#34A853"
        />
        <path
          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"
          fill="#FBBC05"
        />
        <path
          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"
          fill="#EA4335"
        />
      </svg>
      {TEXT.auth.googleButton}
    </button>
  );
}
