package com.philliphsu.clock2;

import android.content.DialogInterface;
import android.database.Cursor;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;

import com.philliphsu.clock2.ringtone.RingtoneLoop;

/**
 * Created by Phillip Hsu on 9/3/2016.
 * <p></p>
 * An alternative to the system's ringtone picker dialog. The differences are:
 * (1) this dialog matches the current theme,
 * (2) the selected ringtone URI is delivered via the {@link OnRingtoneSelectedListener
 * OnRingtoneSelectedListener} callback.
 * <p></p>
 * TODO: If a ringtone was playing and the configuration changes, the ringtone is destroyed.
 * Restore the playing ringtone (seamlessly, without the stutter that comes from restarting).
 * Setting setRetainInstance(true) in onCreate() made our app crash (error said attempted to
 * access closed Cursor).
 * We might need to play the ringtone from a Service instead, so we won't have to worry about
 * the ringtone being destroyed on rotation.
 */
public class RingtonePickerDialog extends BaseAlertDialogFragment {
    private static final String TAG = "RingtonePickerDialog";

    private RingtoneManager mRingtoneManager;
    private OnRingtoneSelectedListener mOnRingtoneSelectedListener;
    private Uri mRingtoneUri;
    private RingtoneLoop mRingtone;

    public interface OnRingtoneSelectedListener {
        void onRingtoneSelected(Uri ringtoneUri);
    }

    /**
     * @param ringtoneUri the URI of the ringtone to show as initially selected
     */
    public static RingtonePickerDialog newInstance(OnRingtoneSelectedListener l, Uri ringtoneUri) {
        RingtonePickerDialog dialog = new RingtonePickerDialog();
        dialog.mOnRingtoneSelectedListener = l;
        dialog.mRingtoneUri = ringtoneUri;
        return dialog;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mRingtoneManager = new RingtoneManager(getActivity());
        mRingtoneManager.setType(RingtoneManager.TYPE_ALARM);
    }

    @Override
    protected AlertDialog createFrom(AlertDialog.Builder builder) {
        // TODO: We set the READ_EXTERNAL_STORAGE permission. Verify that this includes the user's 
        // custom ringtone files.
        Cursor cursor = mRingtoneManager.getCursor();
        int checkedItem = mRingtoneManager.getRingtonePosition(mRingtoneUri);
        String labelColumn = cursor.getColumnName(RingtoneManager.TITLE_COLUMN_INDEX);

        builder.setTitle(R.string.ringtones)
                .setSingleChoiceItems(cursor, checkedItem, labelColumn, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        if (mRingtone != null) {
                            destroyLocalPlayer();
                        }
                        // Here, 'which' param refers to the position of the item clicked.
                        mRingtoneUri = mRingtoneManager.getRingtoneUri(which);
                        mRingtone = new RingtoneLoop(getActivity(), mRingtoneUri);
                        mRingtone.play();
                    }
                });
        return super.createFrom(builder);
    }

    @Override
    public void onDismiss(DialogInterface dialog) {
        super.onDismiss(dialog);
        destroyLocalPlayer();
    }

    @Override
    protected void onOk() {
        if (mOnRingtoneSelectedListener != null) {
            // Here, 'which' param refers to the position of the item clicked.
            mOnRingtoneSelectedListener.onRingtoneSelected(mRingtoneUri);
        }
        dismiss();
    }

    public void setOnRingtoneSelectedListener(OnRingtoneSelectedListener onRingtoneSelectedListener) {
        mOnRingtoneSelectedListener = onRingtoneSelectedListener;
    }

    private void destroyLocalPlayer() {
        if (mRingtone != null) {
            mRingtone.stop();
            mRingtone = null;
        }
    }
}