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//
//   This code is licensed under the MIT License.
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//   of this software and associated documentation files(the "Software"), to deal
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import android.app.Activity;
import com.microsoft.identity.client.ISingleAccountPublicClientApplication;
import com.microsoft.identity.client.SignInParameters;
import com.microsoft.identity.client.IAuthenticationResult;
import com.microsoft.identity.client.exception.MsalException;

/**
 * Demonstrates how to sign in using MSAL's Parameters-based API in SINGLE ACCOUNT MODE.
 * 
 * Use signIn for single account mode. For multiple account mode, use acquireToken.
 */
public class SignInHelper {

    final ISingleAccountPublicClientApplication mPCA;

    /**
     * Signs in the user interactively in single account mode.
     */
    public void signIn(final Activity activity, final List<String> scopes, final SignInCallback callback) {
        SignInParameters parameters = SignInParameters.builder()
            // .withLoginHint(mUsername) // Can pass user's login hint if available
            .withScopes(scopes)
            .withActivity(activity)
            .withCallback(new AuthenticationCallback() {
                @Override
                public void onCancel() {
                    // Handle cancellation
                }
                @Override
                public void onSuccess(IAuthenticationResult authenticationResult) {
                    callback.onComplete(authenticationResult, null);
                }
                @Override
                public void onError(MsalException exception) {
                    callback.onComplete(null, exception);
                }
            }).build();

        mPCA.signIn(parameters);
    }

    /**
     * Example usage for single account mode
     */
    public void exampleSingleAccountUsage(Activity activity) {
        mPCA = /* Initialize your ISingleAccountPublicClientApplication instance here */;
        List<String> graphScopes = Collections.singletonList("User.Read");

        signIn(activity, graphScopes, new SignInCallback() {
            @Override
            public void onComplete(IAuthenticationResult result, MsalException exception) {
                if (result != null) {
                    String accessToken = result.getAccessToken();
                    // Use the access token
                } else if (exception != null) {
                    System.out.println("Failed to sign in: " + exception.getMessage());
                    // Handle the error
                }
            }
        });
    }

    /**
     * Callback interface for sign in operations
     */
    public interface SignInCallback {
        void onComplete(IAuthenticationResult result, MsalException exception);
    }
}