/*
 * Copyright (C) 2020 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 android.view;

import static android.view.View.SYSTEM_UI_FLAG_VISIBLE;
import static android.view.WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING;
import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;

import android.app.ResourcesManager;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.Region;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.DisplayMetrics;
import android.view.Display.Mode;

import com.android.ide.common.rendering.api.ILayoutLog;
import com.android.layoutlib.bridge.Bridge;

public class WindowManagerImpl implements WindowManager {

    private final Context mContext;
    private final DisplayMetrics mMetrics;
    private final Display mDisplay;

    public WindowManagerImpl(Context context, DisplayMetrics metrics) {
        mContext = context;
        mMetrics = metrics;

        DisplayInfo info = new DisplayInfo();
        info.logicalHeight = mMetrics.heightPixels;
        info.logicalWidth = mMetrics.widthPixels;
        info.supportedModes = new Mode[] {
                new Mode(0, mMetrics.widthPixels, mMetrics.heightPixels, 60f)
        };
        info.logicalDensityDpi = mMetrics.densityDpi;
        mDisplay = new Display(null, Display.DEFAULT_DISPLAY, info,
                DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS);
    }

    public WindowManagerImpl createLocalWindowManager(Window parentWindow) {
        Bridge.getLog().fidelityWarning(ILayoutLog.TAG_UNSUPPORTED,
                "The preview does not support multiple windows.",
                null, null, null);
        return this;
    }

    public WindowManagerImpl createPresentationWindowManager(Context displayContext) {
        Bridge.getLog().fidelityWarning(ILayoutLog.TAG_UNSUPPORTED,
                "The preview does not support multiple windows.",
                null, null, null);
        return this;
    }

    /**
     * Sets the window token to assign when none is specified by the client or
     * available from the parent window.
     *
     * @param token The default token to assign.
     */
    public void setDefaultToken(IBinder token) {

    }

    @Override
    public Display getDefaultDisplay() {
        return mDisplay;
    }


    @Override
    public void addView(View arg0, android.view.ViewGroup.LayoutParams arg1) {
        // pass
    }

    @Override
    public void removeView(View arg0) {
        // pass
    }

    @Override
    public void updateViewLayout(View arg0, android.view.ViewGroup.LayoutParams arg1) {
        // pass
    }


    @Override
    public void removeViewImmediate(View arg0) {
        // pass
    }

    @Override
    public void requestAppKeyboardShortcuts(
            KeyboardShortcutsReceiver receiver, int deviceId) {
    }

    @Override
    public Region getCurrentImeTouchRegion() {
        return null;
    }

    @Override
    public void setShouldShowWithInsecureKeyguard(int displayId, boolean shouldShow) {
        // pass
    }

    @Override
    public void setShouldShowSystemDecors(int displayId, boolean shouldShow) {
        // pass
    }

    @Override
    public void setDisplayImePolicy(int displayId, int imePolicy) {
        // pass
    }

    @Override
    public WindowMetrics getCurrentWindowMetrics() {
        final Rect bound = getCurrentBounds(mContext);

        return new WindowMetrics(bound, computeWindowInsets());
    }

    private static Rect getCurrentBounds(Context context) {
        synchronized (ResourcesManager.getInstance()) {
            return context.getResources().getConfiguration().windowConfiguration.getBounds();
        }
    }

    @Override
    public WindowMetrics getMaximumWindowMetrics() {
        return new WindowMetrics(getMaximumBounds(), computeWindowInsets());
    }

    private Rect getMaximumBounds() {
        final Point displaySize = new Point();
        mDisplay.getRealSize(displaySize);
        return new Rect(0, 0, displaySize.x, displaySize.y);
    }

    private WindowInsets computeWindowInsets() {
        try {
            final InsetsState insetsState = new InsetsState();
            final boolean alwaysConsumeSystemBars =
                    WindowManagerGlobal.getWindowManagerService().getWindowInsets(
                            new WindowManager.LayoutParams(), mContext.getDisplayId(), insetsState);
            final Configuration config = mContext.getResources().getConfiguration();
            final boolean isScreenRound = config.isScreenRound();
            final int windowingMode = config.windowConfiguration.getWindowingMode();
            return insetsState.calculateInsets(getCurrentBounds(mContext),
                    null /* ignoringVisibilityState*/, isScreenRound, alwaysConsumeSystemBars,
                    SOFT_INPUT_ADJUST_NOTHING, 0, SYSTEM_UI_FLAG_VISIBLE, TYPE_APPLICATION,
                    windowingMode, null /* typeSideMap */);
        } catch (RemoteException ignore) {
        }
        return null;
    }
}