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import com.microsoft.identity.client.IAccount;
import com.microsoft.identity.client.ISingleAccountPublicClientApplication;
import com.microsoft.identity.client.exception.MsalException;

/**
 * Snippet showing how to get the current account in SINGLE ACCOUNT MODE.
 * 
 * Use getCurrentAccount for single account mode.
 * Do NOT use this in multiple account mode. For multiple account mode, use getAccounts.
 */
public class GetCurrentAccountHelper {

    final ISingleAccountPublicClientApplication mPCA;

    /**
     * Gets the current account for single account mode applications.
     */
    public void getCurrentAccount(final CurrentAccountCallback callback) {
        mPCA.getCurrentAccountAsync(new ISingleAccountPublicClientApplication.CurrentAccountCallback() {
            @Override
            public void onAccountLoaded(IAccount account) { // Successfully retrieved current account, handle result
                callback.onComplete(account, null);
            }

            @Override
            public void onAccountChanged(IAccount priorAccount, IAccount currentAccount) { // Account changed, handle accordingly
                // Handle account changes
                callback.onComplete(currentAccount, null);
            }

            @Override
            public void onError(MsalException exception) { // Failed to retrieve current account, handle error
                callback.onComplete(null, exception);
            }
        });
    }

    /**
     * Example usage for single account mode
     */
    public void exampleSingleAccountUsage() {
        mPCA = /* Initialize your ISingleAccountPublicClientApplication instance here */;
        getCurrentAccount(new CurrentAccountCallback() {
            @Override
            public void onComplete(IAccount account, MsalException exception) {
                if (account != null) {
                    System.out.println("Current account: " + account.getUsername());
                    // Use the account
                } else if (exception != null) {
                    System.out.println("Failed to get current account: " + exception.getMessage());
                    // Handle the error
                } else {
                    System.out.println("No account signed in");
                    // Handle no account scenario
                }
            }
        });
    }

    /**
     * Callback interface for retrieving current account
     */
    public interface CurrentAccountCallback {
        void onComplete(IAccount account, MsalException exception);
    }
}