/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.messaging.ui.appsettings;

import android.content.Context;
import android.preference.EditTextPreference;
import androidx.core.text.BidiFormatter;
import androidx.core.text.TextDirectionHeuristicsCompat;
import android.text.InputType;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;

import com.android.messaging.R;
import com.android.messaging.util.PhoneUtils;

/**
 * Preference that displays a phone number and allows editing via a dialog.
 * <p>
 * A default number can be assigned, which is shown in the preference view and
 * used to populate the dialog editor when the preference value is not set. If
 * the user sets the preference to a number equivalent to the default, the
 * underlying preference is cleared.
 */
public class PhoneNumberPreference extends EditTextPreference {

    private String mDefaultPhoneNumber;
    private int mSubId;

    public PhoneNumberPreference(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        mDefaultPhoneNumber = "";
    }

    public void setDefaultPhoneNumber(final String phoneNumber, final int subscriptionId) {
        mDefaultPhoneNumber = phoneNumber;
        mSubId = subscriptionId;
    }

    @Override
    protected void onBindView(final View view) {
        // Show the preference value if it's set, or the default number if not.
        // If we don't have a default, fall back to a static string (e.g. Unknown).
        String value = getText();
        if (TextUtils.isEmpty(value)) {
          value = mDefaultPhoneNumber;
        }
        final String displayValue = (!TextUtils.isEmpty(value))
                ? PhoneUtils.get(mSubId).formatForDisplay(value)
                : getContext().getString(R.string.unknown_phone_number_pref_display_value);
        final BidiFormatter bidiFormatter = BidiFormatter.getInstance();
        final String phoneNumber = bidiFormatter.unicodeWrap
                        (displayValue, TextDirectionHeuristicsCompat.LTR);
        // Set the value as the summary and let the superclass populate the views
        setSummary(phoneNumber);
        super.onBindView(view);
    }

    @Override
    protected void onBindDialogView(final View view) {
        super.onBindDialogView(view);

        final String value = getText();

        // If the preference is empty, populate the EditText with the default number instead.
        if (TextUtils.isEmpty(value) && !TextUtils.isEmpty(mDefaultPhoneNumber)) {
            final BidiFormatter bidiFormatter = BidiFormatter.getInstance();
            final String phoneNumber = bidiFormatter.unicodeWrap
                (PhoneUtils.get(mSubId).getCanonicalBySystemLocale(mDefaultPhoneNumber),
                            TextDirectionHeuristicsCompat.LTR);
            getEditText().setText(phoneNumber);
        }
        getEditText().setInputType(InputType.TYPE_CLASS_PHONE);
    }

    @Override
    protected void onDialogClosed(final boolean positiveResult) {
        if (positiveResult && mDefaultPhoneNumber != null) {
            final String value = getEditText().getText().toString();
            final PhoneUtils phoneUtils = PhoneUtils.get(mSubId);
            final String phoneNumber = phoneUtils.getCanonicalBySystemLocale(value);
            final String defaultPhoneNumber = phoneUtils.getCanonicalBySystemLocale(
                    mDefaultPhoneNumber);

            // If the new value is the default, clear the preference.
            if (phoneNumber.equals(defaultPhoneNumber)) {
                setText("");
                return;
            }
        }
        super.onDialogClosed(positiveResult);
    }

    @Override
    public void setText(final String text) {
        super.setText(text);

        // EditTextPreference doesn't show the value on the preference view, but we do.
        // We thus need to force a rebind of the view when a new value is set.
        notifyChanged();
    }
}