/*
 * Copyright (C) 2021 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.tv.settings.library.util;

import android.annotation.ColorInt;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.Signature;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.drawable.Drawable;
import android.os.BatteryManager;
import android.os.UserHandle;
import android.print.PrintManager;
import android.text.TextUtils;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.core.graphics.drawable.RoundedBitmapDrawable;
import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory;

import com.android.internal.annotations.VisibleForTesting;

import java.text.NumberFormat;

public class LibUtils {

    @VisibleForTesting
    static final String STORAGE_MANAGER_ENABLED_PROPERTY =
            "ro.storage_manager.enabled";


    public static final String PROPERTY_APP_HIBERNATION_ENABLED =
            "app_hibernation_enabled";

    private static Signature[] sSystemSignature;
    private static String sPermissionControllerPackageName;
    private static String sServicesSystemSharedLibPackageName;
    private static String sSharedSystemSharedLibPackageName;



    /** Formats a double from 0.0..100.0 with an option to round **/
    public static String formatPercentage(double percentage, boolean round) {
        final int localPercentage = round ? Math.round((float) percentage) : (int) percentage;
        return formatPercentage(localPercentage);
    }

    /** Formats the ratio of amount/total as a percentage. */
    public static String formatPercentage(long amount, long total) {
        return formatPercentage(((double) amount) / total);
    }

    /** Formats an integer from 0..100 as a percentage. */
    public static String formatPercentage(int percentage) {
        return formatPercentage(((double) percentage) / 100.0);
    }

    /** Formats a double from 0.0..1.0 as a percentage. */
    public static String formatPercentage(double percentage) {
        return NumberFormat.getPercentInstance().format(percentage);
    }

    public static int getBatteryLevel(Intent batteryChangedIntent) {
        int level = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
        int scale = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
        return (level * 100) / scale;
    }

    public static ColorStateList getColorAccent(Context context) {
        return getColorAttr(context, android.R.attr.colorAccent);
    }

    public static ColorStateList getColorError(Context context) {
        return getColorAttr(context, android.R.attr.colorError);
    }

    @ColorInt
    public static int getColorAccentDefaultColor(Context context) {
        return getColorAttrDefaultColor(context, android.R.attr.colorAccent);
    }

    @ColorInt
    public static int getColorErrorDefaultColor(Context context) {
        return getColorAttrDefaultColor(context, android.R.attr.colorError);
    }

    @ColorInt
    public static int getColorStateListDefaultColor(Context context, int resId) {
        final ColorStateList list =
                context.getResources().getColorStateList(resId, context.getTheme());
        return list.getDefaultColor();
    }

    /**
     * This method computes disabled color from normal color
     *
     * @param context    the context
     * @param inputColor normal color.
     * @return disabled color.
     */
    @ColorInt
    public static int getDisabled(Context context, int inputColor) {
        return applyAlphaAttr(context, android.R.attr.disabledAlpha, inputColor);
    }

    @ColorInt
    public static int applyAlphaAttr(Context context, int attr, int inputColor) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        float alpha = ta.getFloat(0, 0);
        ta.recycle();
        return applyAlpha(alpha, inputColor);
    }

    @ColorInt
    public static int applyAlpha(float alpha, int inputColor) {
        alpha *= Color.alpha(inputColor);
        return Color.argb((int) (alpha), Color.red(inputColor), Color.green(inputColor),
                Color.blue(inputColor));
    }

    @ColorInt
    public static int getColorAttrDefaultColor(Context context, int attr) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        @ColorInt int colorAccent = ta.getColor(0, 0);
        ta.recycle();
        return colorAccent;
    }

    public static ColorStateList getColorAttr(Context context, int attr) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        ColorStateList stateList = null;
        try {
            stateList = ta.getColorStateList(0);
        } finally {
            ta.recycle();
        }
        return stateList;
    }

    public static int getThemeAttr(Context context, int attr) {
        return getThemeAttr(context, attr, 0);
    }

    public static int getThemeAttr(Context context, int attr, int defaultValue) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        int theme = ta.getResourceId(0, defaultValue);
        ta.recycle();
        return theme;
    }

    public static Drawable getDrawable(Context context, int attr) {
        TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
        Drawable drawable = ta.getDrawable(0);
        ta.recycle();
        return drawable;
    }

    /**
     * Create a color matrix suitable for a ColorMatrixColorFilter that modifies only the color but
     * preserves the alpha for a given drawable
     *
     * @return a color matrix that uses the source alpha and given color
     */
    public static ColorMatrix getAlphaInvariantColorMatrixForColor(@ColorInt int color) {
        int r = Color.red(color);
        int g = Color.green(color);
        int b = Color.blue(color);

        ColorMatrix cm = new ColorMatrix(new float[]{
                0, 0, 0, 0, r,
                0, 0, 0, 0, g,
                0, 0, 0, 0, b,
                0, 0, 0, 1, 0});

        return cm;
    }

    /**
     * Create a ColorMatrixColorFilter to tint a drawable but retain its alpha characteristics
     *
     * @return a ColorMatrixColorFilter which changes the color of the output but is invariant on
     * the source alpha
     */
    public static ColorFilter getAlphaInvariantColorFilterForColor(@ColorInt int color) {
        return new ColorMatrixColorFilter(getAlphaInvariantColorMatrixForColor(color));
    }

    /**
     * Determine whether a package is a "system package", in which case certain things (like
     * disabling notifications or disabling the package altogether) should be disallowed.
     */
    public static boolean isSystemPackage(Resources resources, PackageManager pm, PackageInfo pkg) {
        if (sSystemSignature == null) {
            sSystemSignature = new Signature[]{getSystemSignature(pm)};
        }
        if (sPermissionControllerPackageName == null) {
            sPermissionControllerPackageName = pm.getPermissionControllerPackageName();
        }
        if (sServicesSystemSharedLibPackageName == null) {
            sServicesSystemSharedLibPackageName = pm.getServicesSystemSharedLibraryPackageName();
        }
        if (sSharedSystemSharedLibPackageName == null) {
            sSharedSystemSharedLibPackageName = pm.getSharedSystemSharedLibraryPackageName();
        }
        return (sSystemSignature[0] != null
                && sSystemSignature[0].equals(getFirstSignature(pkg)))
                || pkg.packageName.equals(sPermissionControllerPackageName)
                || pkg.packageName.equals(sServicesSystemSharedLibPackageName)
                || pkg.packageName.equals(sSharedSystemSharedLibPackageName)
                || pkg.packageName.equals(PrintManager.PRINT_SPOOLER_PACKAGE_NAME)
                || isDeviceProvisioningPackage(resources, pkg.packageName);
    }

    /**
     * Returns {@code true} if the supplied package is the device provisioning app. Otherwise,
     * returns {@code false}.
     */
    public static boolean isDeviceProvisioningPackage(Resources resources, String packageName) {
        String deviceProvisioningPackage = resources.getString(
                resources.getIdentifier("config_deviceProvisioningPackage",
                        "string", "android"));
        return deviceProvisioningPackage != null && deviceProvisioningPackage.equals(packageName);
    }

    private static Signature getFirstSignature(PackageInfo pkg) {
        if (pkg != null && pkg.signatures != null && pkg.signatures.length > 0) {
            return pkg.signatures[0];
        }
        return null;
    }

    private static Signature getSystemSignature(PackageManager pm) {
        try {
            final PackageInfo sys = pm.getPackageInfo("android", PackageManager.GET_SIGNATURES);
            return getFirstSignature(sys);
        } catch (PackageManager.NameNotFoundException e) {
        }
        return null;
    }


    /** Get the corresponding adaptive icon drawable. */
    public static Drawable getBadgedIcon(Context context, Drawable icon, UserHandle user) {
        return icon;
    }

    /** Get the {@link Drawable} that represents the app icon */
    public static Drawable getBadgedIcon(Context context, ApplicationInfo appInfo) {
        return getBadgedIcon(context, appInfo.loadUnbadgedIcon(context.getPackageManager()),
                UserHandle.getUserHandleForUid(appInfo.uid));
    }

    /**
     * Returns a bitmap with rounded corner.
     *
     * @param context      application context.
     * @param source       bitmap to apply round corner.
     * @param cornerRadius corner radius value.
     */
    public static Bitmap convertCornerRadiusBitmap(@NonNull Context context,
            @NonNull Bitmap source, @NonNull float cornerRadius) {
        final Bitmap roundedBitmap = Bitmap.createBitmap(source.getWidth(), source.getHeight(),
                Bitmap.Config.ARGB_8888);
        final RoundedBitmapDrawable drawable =
                RoundedBitmapDrawableFactory.create(context.getResources(), source);
        drawable.setAntiAlias(true);
        drawable.setCornerRadius(cornerRadius);
        final Canvas canvas = new Canvas(roundedBitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
        return roundedBitmap;
    }

    /**
     * Returns the ResolveInfo for the system activity that matches given intent filter or null if
     * no such activity exists.
     *
     * @param context Context of the caller
     * @param intent  The intent matching the desired system app
     * @return ResolveInfo of the matching activity or null if no match exists
     */
    public static ResolveInfo systemIntentIsHandled(Context context, Intent intent) {
        if (intent == null) {
            return null;
        }

        final PackageManager pm = context.getPackageManager();
        for (ResolveInfo info : pm.queryIntentActivities(intent, 0)) {
            if (info.activityInfo != null
                    && (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)
                    == ApplicationInfo.FLAG_SYSTEM) {
                return info;
            }
        }
        return null;
    }

    public static void showToast(Context context, String resName) {
        String toast = ResourcesUtil.getString(context, resName);
        if (!TextUtils.isEmpty(toast)) {
            Toast.makeText(context, toast, Toast.LENGTH_SHORT).show();
        }
    }
}