/*
 * Copyright (C) 2023 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.app.sdksandbox.sandboxactivity;

import android.annotation.FlaggedApi;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SystemApi;
import android.app.sdksandbox.SdkSandboxManager;
import android.app.sdksandbox.sdkprovider.SdkSandboxActivityRegistry;
import android.content.Context;
import android.content.Intent;
import android.os.Build;

import androidx.annotation.RequiresApi;

import com.android.sdksandbox.flags.Flags;

/**
 * Provides information required for building the sandbox activities.
 *
 * @hide
 */
@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
@FlaggedApi(Flags.FLAG_SANDBOX_ACTIVITY_SDK_BASED_CONTEXT)
public abstract class SdkSandboxActivityAuthority {
    private static class InstanceHolder {
        private static final SdkSandboxActivityAuthority INSTANCE =
                new SdkSandboxActivityAuthorityImpl();
    }

    /** Returns a Single instance of this class, instantiated lazily. */
    @NonNull
    public static SdkSandboxActivityAuthority getInstance() {
        return InstanceHolder.INSTANCE;
    }

    private SdkSandboxActivityAuthority() {}

    /**
     * Returns true if the intent is an SdkSandbox Activity intent. In other words, if the intent
     * targets either the Sdk Sandbox package or the action is {@link
     * ACTION_START_SANDBOXED_ACTIVITY}.
     *
     * @param context the context.
     * @param intent the intent.
     * @hide
     */
    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
    public static boolean isSdkSandboxActivityIntent(
            @NonNull Context context, @Nullable Intent intent) {
        if (intent == null) {
            return false;
        }
        if (intent.getAction() != null
                && intent.getAction().equals(SdkSandboxManager.ACTION_START_SANDBOXED_ACTIVITY)) {
            return true;
        }
        final String sandboxPackageName = context.getPackageManager().getSdkSandboxPackageName();
        if (intent.getPackage() != null && intent.getPackage().equals(sandboxPackageName)) {
            return true;
        }
        if (intent.getComponent() != null
                && intent.getComponent().getPackageName().equals(sandboxPackageName)) {
            return true;
        }
        return false;
    }

    /**
     * Returns {@link ActivityContextInfo} instance containing the information which is needed to
     * build the sandbox activity {@link android.content.Context} for the passed {@link Intent}.
     *
     * @param intent an {@link Intent} for a sandbox {@link android.app.Activity} containing
     *     information to identify the SDK which requested the activity.
     * @return {@link ActivityContextInfo} instance.
     * @throws IllegalArgumentException if the intent doesn't refer to a registered {@link
     *     android.app.sdksandbox.sdkprovider.SdkSandboxActivityHandler}
     * @throws IllegalStateException if Customized SDK Context flag is not enabled
     */
    @NonNull
    @RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
    public ActivityContextInfo getActivityContextInfo(@NonNull Intent intent) {
        SdkSandboxActivityRegistry registry = SdkSandboxActivityRegistry.getInstance();
        ActivityContextInfo contextInfo = registry.getContextInfo(intent);
        if (contextInfo == null) {
            throw new IllegalArgumentException(
                    "There is no registered SdkSandboxActivityHandler "
                            + "for the passed intent, "
                            + intent);
        }
        return contextInfo;
    }

    private static class SdkSandboxActivityAuthorityImpl extends SdkSandboxActivityAuthority {}
}