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import com.microsoft.identity.client.IAccount;
import com.microsoft.identity.client.IMultipleAccountPublicClientApplication;
import com.microsoft.identity.client.exception.MsalException;
import java.util.List;

/**
 * Snippet showing how to get all accounts in MULTIPLE ACCOUNT MODE.
 * 
 * Use getAccounts for multiple account mode.
 * Do NOT use this in single account mode. For single account mode, use getCurrentAccount.
 */
public class GetAccountsHelper {

    private IMultipleAccountPublicClientApplication mPCA;

    /**
     * Gets all accounts for multiple account mode applications.
     */
    public void getAccounts(final AccountsCallback callback) {
        mPCA.getAccounts(new IMultipleAccountPublicClientApplication.LoadAccountsCallback() {
            @Override
            public void onTaskCompleted(List<IAccount> result) { // Successfully retrieved accounts, handle result
                callback.onComplete(result, null);
            }

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

    /**
     * Example usage for multiple account mode
     */
    public void exampleMultipleAccountUsage() {
        mPCA = /* Initialize your IMultipleAccountPublicClientApplication instance here */;
        getAccounts(new AccountsCallback() {
            @Override
            public void onComplete(List<IAccount> accounts, MsalException exception) {
                if (accounts != null) {
                    if (accounts.isEmpty()) {
                        System.out.println("No accounts found");
                        // Handle no accounts scenario
                    } else {
                        // Process the accounts
                        for (IAccount account : accounts) {
                            System.out.println("Account: " + account.getUsername());
                        }
                    }
                } else if (exception != null) {
                    System.out.println("Failed to get accounts: " + exception.getMessage());
                    // Handle the error
                }
            }
        });
    }

    /**
     * Callback interface for retrieving multiple accounts
     */
    public interface AccountsCallback {
        void onComplete(List<IAccount> accounts, MsalException exception);
    }
}