/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

package org.libreoffice.androidlib;

import android.app.Activity;
import android.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

/** Class to handle progress when loading, saving, or handling other time intensive operations. */
public class ProgressDialog {
    /** For the inflater. */
    Activity mActivity;

    /** The underlying dialog. */
    AlertDialog mProgressDialog = null;

    /** Various elements of the dialog. */
    TextView mTextView;
    ProgressBar mIndeterminateProgress;
    ProgressBar mDeterminateProgress;

    /** Current progress of the determinate progress bar. */
    int mProgress = 0;

    public ProgressDialog(Activity activity) {
        mActivity = activity;
    }

    /** Set up the dialog if it does not exist; but don't show it yet. */
    private void create() {
        if (mProgressDialog != null)
            return;

        LayoutInflater inflater = mActivity.getLayoutInflater();

        View loadingView = inflater.inflate(R.layout.lolib_dialog_loading, null);

        mTextView = loadingView.findViewById(R.id.progress_dialog_text);
        mIndeterminateProgress = loadingView.findViewById(R.id.progress_indeterminate);
        mDeterminateProgress = loadingView.findViewById(R.id.progress_determinate);

        mProgressDialog = new AlertDialog.Builder(mActivity)
            .setView(loadingView)
            .setCancelable(false)
            .create();
    }

    /** Set the progress to indeterminate state. */
    public void indeterminate(int messageId) {
        create();

        mIndeterminateProgress.setVisibility(View.VISIBLE);
        mDeterminateProgress.setVisibility(View.INVISIBLE);
        mTextView.setText(mActivity.getText(messageId));

        mProgressDialog.show();
    }

    /** Set the progress to indeterminate state. */
    public void determinate(int messageId) {
        create();

        mIndeterminateProgress.setVisibility(View.INVISIBLE);
        mDeterminateProgress.setVisibility(View.VISIBLE);
        mTextView.setText(mActivity.getText(messageId));

        mProgress = 0;
        mDeterminateProgress.setProgress(mProgress);

        mProgressDialog.show();
    }

    /** Update the progress value. */
    public void determinateProgress(int progress) {
        if (mProgressDialog == null)
            return;

        if (mProgress > progress)
            return;

        mProgress = progress;
        mDeterminateProgress.setProgress(mProgress);
    }

    /** Kill the dialog. */
    public void dismiss() {
        if (mProgressDialog == null)
            return;

        mProgressDialog.dismiss();
        mProgressDialog = null;
    }
}

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