/*
 * Copyright (C) 2007 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.irccloud.android;


import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.DialogPreference;
import android.preference.Preference;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

import androidx.appcompat.app.AlertDialog;

/**
 * A base class for {@link Preference} objects that are
 * dialog-based. These preferences will, when clicked, open a dialog showing the
 * actual preference controls.
 *
 * @attr ref android.R.styleable#DialogPreference_dialogTitle
 * @attr ref android.R.styleable#DialogPreference_dialogMessage
 * @attr ref android.R.styleable#DialogPreference_dialogIcon
 * @attr ref android.R.styleable#DialogPreference_dialogLayout
 * @attr ref android.R.styleable#DialogPreference_positiveButtonText
 * @attr ref android.R.styleable#DialogPreference_negativeButtonText
 */
public abstract class AppCompatDialogPreference extends DialogPreference implements
        DialogInterface.OnClickListener, DialogInterface.OnDismissListener,
        PreferenceManager.OnActivityDestroyListener {
    private AlertDialog.Builder mBuilder;

    /** The dialog, if it is showing. */
    private Dialog mDialog;

    /** Which button was clicked. */
    private int mWhichButtonClicked;

    public AppCompatDialogPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public AppCompatDialogPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * Prepares the dialog builder to be shown when the preference is clicked.
     * Use this to set custom properties on the dialog.
     * <p>
     * Do not {@link AlertDialog.Builder#create()} or
     * {@link AlertDialog.Builder#show()}.
     */
    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
    }

    @Override
    protected void onClick() {
        showDialog(null);
    }

    /**
     * Shows the dialog associated with this Preference. This is normally initiated
     * automatically on clicking on the preference. Call this method if you need to
     * show the dialog on some other event.
     *
     * @param state Optional instance state to restore on the dialog
     */
    protected void showDialog(Bundle state) {
        Context context = getContext();

        mWhichButtonClicked = DialogInterface.BUTTON_NEGATIVE;

        mBuilder = new AlertDialog.Builder(context)
                .setTitle(getDialogTitle())
                .setIcon(getDialogIcon())
                .setPositiveButton(getPositiveButtonText(), this)
                .setNegativeButton(getNegativeButtonText(), this);

        View contentView = onCreateDialogView();
        if (contentView != null) {
            onBindDialogView(contentView);
            mBuilder.setView(contentView);
        } else {
            mBuilder.setMessage(getDialogMessage());
        }

        onPrepareDialogBuilder(mBuilder);

        // Create the dialog
        final Dialog dialog = mDialog = mBuilder.create();
        if (state != null) {
            dialog.onRestoreInstanceState(state);
        }
        if (needInputMethod()) {
            requestInputMethod(dialog);
        }
        dialog.setOnDismissListener(this);
        dialog.show();
    }

    /**
     * Returns whether the preference needs to display a soft input method when the dialog
     * is displayed. Default is false. Subclasses should override this method if they need
     * the soft input method brought up automatically.
     * @hide
     */
    protected boolean needInputMethod() {
        return false;
    }

    /**
     * Sets the required flags on the dialog window to enable input method window to show up.
     */
    private void requestInputMethod(Dialog dialog) {
        Window window = dialog.getWindow();
        window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE |
                WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
    }

    /**
     * Creates the content view for the dialog (if a custom content view is
     * required). By default, it inflates the dialog layout resource if it is
     * set.
     *
     * @return The content View for the dialog.
     * @see #setLayoutResource(int)
     */
    protected View onCreateDialogView() {
        if (getDialogLayoutResource() == 0) {
            return null;
        }

        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
        return inflater.inflate(getDialogLayoutResource(), null);
    }

    /**
     * Binds views in the content View of the dialog to data.
     * <p>
     * Make sure to call through to the superclass implementation.
     *
     * @param view The content View of the dialog, if it is custom.
     */
    protected void onBindDialogView(View view) {
        super.onBindDialogView(view);
    }

    public void onClick(DialogInterface dialog, int which) {
        mWhichButtonClicked = which;
    }

    public void onDismiss(DialogInterface dialog) {
        mDialog = null;
        onDialogClosed(mWhichButtonClicked == DialogInterface.BUTTON_POSITIVE);
    }

    /**
     * Called when the dialog is dismissed and should be used to save data to
     * the {@link SharedPreferences}.
     *
     * @param positiveResult Whether the positive button was clicked (true), or
     *            the negative button was clicked or the dialog was canceled (false).
     */
    protected void onDialogClosed(boolean positiveResult) {
    }

    /**
     * Gets the dialog that is shown by this preference.
     *
     * @return The dialog, or null if a dialog is not being shown.
     */
    public Dialog getDialog() {
        return mDialog;
    }

    /**
     * {@inheritDoc}
     */
    public void onActivityDestroy() {

        if (mDialog == null || !mDialog.isShowing()) {
            return;
        }

        mDialog.dismiss();
    }

    @Override
    protected Parcelable onSaveInstanceState() {
        final Parcelable superState = super.onSaveInstanceState();
        if (mDialog == null || !mDialog.isShowing()) {
            return superState;
        }

        final SavedState myState = new SavedState(superState);
        myState.isDialogShowing = true;
        myState.dialogBundle = mDialog.onSaveInstanceState();
        return myState;
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        if (state == null || !state.getClass().equals(SavedState.class)) {
            // Didn't save state for us in onSaveInstanceState
            super.onRestoreInstanceState(state);
            return;
        }

        SavedState myState = (SavedState) state;
        super.onRestoreInstanceState(myState.getSuperState());
        if (myState.isDialogShowing) {
            showDialog(myState.dialogBundle);
        }
    }

    private static class SavedState extends BaseSavedState {
        boolean isDialogShowing;
        Bundle dialogBundle;

        public SavedState(Parcel source) {
            super(source);
            isDialogShowing = source.readInt() == 1;
            dialogBundle = source.readBundle();
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
            super.writeToParcel(dest, flags);
            dest.writeInt(isDialogShowing ? 1 : 0);
            dest.writeBundle(dialogBundle);
        }

        public SavedState(Parcelable superState) {
            super(superState);
        }

        public static final Parcelable.Creator<SavedState> CREATOR =
                new Parcelable.Creator<SavedState>() {
                    public SavedState createFromParcel(Parcel in) {
                        return new SavedState(in);
                    }

                    public SavedState[] newArray(int size) {
                        return new SavedState[size];
                    }
                };
    }

}