/*
 * Copyright (C) 2006 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.server.am;

import android.app.AppOpsManager;
import android.app.BroadcastOptions;
import android.content.IIntentReceiver;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ResolveInfo;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.SystemClock;
import android.os.UserHandle;
import android.util.PrintWriterPrinter;
import android.util.TimeUtils;

import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Set;

/**
 * An active intent broadcast.
 */
final class BroadcastRecord extends Binder {
    final Intent intent;    // the original intent that generated us
    final ComponentName targetComp; // original component name set on the intent
    final ProcessRecord callerApp; // process that sent this
    final String callerPackage; // who sent this
    final int callingPid;   // the pid of who sent this
    final int callingUid;   // the uid of who sent this
    final boolean ordered;  // serialize the send to receivers?
    final boolean sticky;   // originated from existing sticky data?
    final boolean initialSticky; // initial broadcast from register to sticky?
    final int userId;       // user id this broadcast was for
    final String resolvedType; // the resolved data type
    final String[] requiredPermissions; // permissions the caller has required
    final int appOp;        // an app op that is associated with this broadcast
    final BroadcastOptions options; // BroadcastOptions supplied by caller
    final List receivers;   // contains BroadcastFilter and ResolveInfo
    IIntentReceiver resultTo; // who receives final result if non-null
    long enqueueClockTime;  // the clock time the broadcast was enqueued
    long dispatchTime;      // when dispatch started on this set of receivers
    long dispatchClockTime; // the clock time the dispatch started
    long receiverTime;      // when current receiver started for timeouts.
    long finishTime;        // when we finished the broadcast.
    int resultCode;         // current result code value.
    String resultData;      // current result data value.
    Bundle resultExtras;    // current result extra data values.
    boolean resultAbort;    // current result abortBroadcast value.
    int nextReceiver;       // next receiver to be executed.
    IBinder receiver;       // who is currently running, null if none.
    int state;
    int anrCount;           // has this broadcast record hit any ANRs?
    BroadcastQueue queue;   // the outbound queue handling this broadcast

    static final int IDLE = 0;
    static final int APP_RECEIVE = 1;
    static final int CALL_IN_RECEIVE = 2;
    static final int CALL_DONE_RECEIVE = 3;
    static final int WAITING_SERVICES = 4;

    // The following are set when we are calling a receiver (one that
    // was found in our list of registered receivers).
    BroadcastFilter curFilter;

    // The following are set only when we are launching a receiver (one
    // that was found by querying the package manager).
    ProcessRecord curApp;       // hosting application of current receiver.
    ComponentName curComponent; // the receiver class that is currently running.
    ActivityInfo curReceiver;   // info about the receiver that is currently running.

    void dump(PrintWriter pw, String prefix) {
        final long now = SystemClock.uptimeMillis();

        pw.print(prefix); pw.print(this); pw.print(" to user "); pw.println(userId);
        pw.print(prefix); pw.println(intent.toInsecureString());
        if (targetComp != null && targetComp != intent.getComponent()) {
            pw.print(prefix); pw.print("  targetComp: "); pw.println(targetComp.toShortString());
        }
        Bundle bundle = intent.getExtras();
        if (bundle != null) {
            pw.print(prefix); pw.print("  extras: "); pw.println(bundle.toString());
        }
        pw.print(prefix); pw.print("caller="); pw.print(callerPackage); pw.print(" ");
                pw.print(callerApp != null ? callerApp.toShortString() : "null");
                pw.print(" pid="); pw.print(callingPid);
                pw.print(" uid="); pw.println(callingUid);
        if ((requiredPermissions != null && requiredPermissions.length > 0)
                || appOp != AppOpsManager.OP_NONE) {
            pw.print(prefix); pw.print("requiredPermissions=");
            pw.print(Arrays.toString(requiredPermissions));
            pw.print("  appOp="); pw.println(appOp);
        }
        if (options != null) {
            pw.print(prefix); pw.print("options="); pw.println(options.toBundle());
        }
        pw.print(prefix); pw.print("enqueueClockTime=");
                pw.print(new Date(enqueueClockTime));
                pw.print(" dispatchClockTime=");
                pw.println(new Date(dispatchClockTime));
        pw.print(prefix); pw.print("dispatchTime=");
                TimeUtils.formatDuration(dispatchTime, now, pw);
        if (finishTime != 0) {
            pw.print(" finishTime="); TimeUtils.formatDuration(finishTime, now, pw);
        } else {
            pw.print(" receiverTime="); TimeUtils.formatDuration(receiverTime, now, pw);
        }
        pw.println("");
        if (anrCount != 0) {
            pw.print(prefix); pw.print("anrCount="); pw.println(anrCount);
        }
        if (resultTo != null || resultCode != -1 || resultData != null) {
            pw.print(prefix); pw.print("resultTo="); pw.print(resultTo);
                    pw.print(" resultCode="); pw.print(resultCode);
                    pw.print(" resultData="); pw.println(resultData);
        }
        if (resultExtras != null) {
            pw.print(prefix); pw.print("resultExtras="); pw.println(resultExtras);
        }
        if (resultAbort || ordered || sticky || initialSticky) {
            pw.print(prefix); pw.print("resultAbort="); pw.print(resultAbort);
                    pw.print(" ordered="); pw.print(ordered);
                    pw.print(" sticky="); pw.print(sticky);
                    pw.print(" initialSticky="); pw.println(initialSticky);
        }
        if (nextReceiver != 0 || receiver != null) {
            pw.print(prefix); pw.print("nextReceiver="); pw.print(nextReceiver);
                    pw.print(" receiver="); pw.println(receiver);
        }
        if (curFilter != null) {
            pw.print(prefix); pw.print("curFilter="); pw.println(curFilter);
        }
        if (curReceiver != null) {
            pw.print(prefix); pw.print("curReceiver="); pw.println(curReceiver);
        }
        if (curApp != null) {
            pw.print(prefix); pw.print("curApp="); pw.println(curApp);
            pw.print(prefix); pw.print("curComponent=");
                    pw.println((curComponent != null ? curComponent.toShortString() : "--"));
            if (curReceiver != null && curReceiver.applicationInfo != null) {
                pw.print(prefix); pw.print("curSourceDir=");
                        pw.println(curReceiver.applicationInfo.sourceDir);
            }
        }
        if (state != IDLE) {
            String stateStr = " (?)";
            switch (state) {
                case APP_RECEIVE:       stateStr=" (APP_RECEIVE)"; break;
                case CALL_IN_RECEIVE:   stateStr=" (CALL_IN_RECEIVE)"; break;
                case CALL_DONE_RECEIVE: stateStr=" (CALL_DONE_RECEIVE)"; break;
                case WAITING_SERVICES:  stateStr=" (WAITING_SERVICES)"; break;
            }
            pw.print(prefix); pw.print("state="); pw.print(state); pw.println(stateStr);
        }
        final int N = receivers != null ? receivers.size() : 0;
        String p2 = prefix + "  ";
        PrintWriterPrinter printer = new PrintWriterPrinter(pw);
        for (int i = 0; i < N; i++) {
            Object o = receivers.get(i);
            pw.print(prefix); pw.print("Receiver #"); pw.print(i);
                    pw.print(": "); pw.println(o);
            if (o instanceof BroadcastFilter)
                ((BroadcastFilter)o).dumpBrief(pw, p2);
            else if (o instanceof ResolveInfo)
                ((ResolveInfo)o).dump(printer, p2);
        }
    }

    BroadcastRecord(BroadcastQueue _queue,
            Intent _intent, ProcessRecord _callerApp, String _callerPackage,
            int _callingPid, int _callingUid, String _resolvedType, String[] _requiredPermissions,
            int _appOp, BroadcastOptions _options, List _receivers, IIntentReceiver _resultTo,
            int _resultCode, String _resultData, Bundle _resultExtras, boolean _serialized,
            boolean _sticky, boolean _initialSticky,
            int _userId) {
        queue = _queue;
        intent = _intent;
        targetComp = _intent.getComponent();
        callerApp = _callerApp;
        callerPackage = _callerPackage;
        callingPid = _callingPid;
        callingUid = _callingUid;
        resolvedType = _resolvedType;
        requiredPermissions = _requiredPermissions;
        appOp = _appOp;
        options = _options;
        receivers = _receivers;
        resultTo = _resultTo;
        resultCode = _resultCode;
        resultData = _resultData;
        resultExtras = _resultExtras;
        ordered = _serialized;
        sticky = _sticky;
        initialSticky = _initialSticky;
        userId = _userId;
        nextReceiver = 0;
        state = IDLE;
    }

    boolean cleanupDisabledPackageReceiversLocked(
            String packageName, Set<String> filterByClasses, int userId, boolean doit) {
        if ((userId != UserHandle.USER_ALL && this.userId != userId) || receivers == null) {
            return false;
        }

        boolean didSomething = false;
        Object o;
        for (int i = receivers.size() - 1; i >= 0; i--) {
            o = receivers.get(i);
            if (!(o instanceof ResolveInfo)) {
                continue;
            }
            ActivityInfo info = ((ResolveInfo)o).activityInfo;

            final boolean sameComponent = packageName == null
                    || (info.applicationInfo.packageName.equals(packageName)
                    && (filterByClasses == null || filterByClasses.contains(info.name)));
            if (sameComponent) {
                if (!doit) {
                    return true;
                }
                didSomething = true;
                receivers.remove(i);
                if (i < nextReceiver) {
                    nextReceiver--;
                }
            }
        }
        nextReceiver = Math.min(nextReceiver, receivers.size());

        return didSomething;
    }

    public String toString() {
        return "BroadcastRecord{"
            + Integer.toHexString(System.identityHashCode(this))
            + " u" + userId + " " + intent.getAction() + "}";
    }
}