/*
 * Copyright (C) 2014 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.telecom;

import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.telecom.Log;
import android.telecom.PhoneAccountHandle;

import com.android.internal.telecom.IInCallAdapter;

import java.util.List;

/**
 * Receives call commands and updates from in-call app and passes them through to CallsManager.
 * {@link InCallController} creates an instance of this class and passes it to the in-call app after
 * binding to it. This adapter can receive commands and updates until the in-call app is unbound.
 */
class InCallAdapter extends IInCallAdapter.Stub {
    private final CallsManager mCallsManager;
    private final CallIdMapper mCallIdMapper;
    private final TelecomSystem.SyncRoot mLock;
    private final String mOwnerPackageName;
    private final String mOwnerPackageAbbreviation;

    /** Persists the specified parameters. */
    public InCallAdapter(CallsManager callsManager, CallIdMapper callIdMapper,
            TelecomSystem.SyncRoot lock, String ownerPackageName) {
        mCallsManager = callsManager;
        mCallIdMapper = callIdMapper;
        mLock = lock;
        mOwnerPackageName = ownerPackageName;
        mOwnerPackageAbbreviation = Log.getPackageAbbreviation(ownerPackageName);
    }

    @Override
    public void answerCall(String callId, int videoState) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_ANSWER_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "answerCall(%s,%d)", callId, videoState);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.answerCall(call, videoState);
                    } else {
                        Log.w(this, "answerCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void deflectCall(String callId, Uri address) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_DEFLECT_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.i(this, "deflectCall - %s, %s ", callId, Log.pii(address));
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.deflectCall(call, address);
                    } else {
                        Log.w(this, "deflectCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void rejectCall(String callId, boolean rejectWithMessage, String textMessage) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_REJECT_CALL, mOwnerPackageAbbreviation);

            int callingUid = Binder.getCallingUid();
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    // Check to make sure the in-call app's user isn't restricted from sending SMS.
                    // If so, silently drop the outgoing message. Also drop message if the screen is
                    // locked.
                    if (!mCallsManager.isReplyWithSmsAllowed(callingUid)) {
                        rejectWithMessage = false;
                        textMessage = null;
                    }

                    Log.d(this, "rejectCall(%s,%b,%s)", callId, rejectWithMessage, textMessage);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.rejectCall(call, rejectWithMessage, textMessage);
                    } else {
                        Log.w(this, "setRingback, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void rejectCallWithReason(String callId,
            @android.telecom.Call.RejectReason int rejectReason) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_REJECT_CALL, mOwnerPackageAbbreviation);

            int callingUid = Binder.getCallingUid();
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "rejectCallWithReason(%s,%d)", callId, rejectReason);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.rejectCall(call, rejectReason);
                    } else {
                        Log.w(this, "rejectCallWithReason, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    public void transferCall(String callId, Uri targetNumber, boolean isConfirmationRequired) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_TRANSFER_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.i(this, "transferCall - %s, %s, %b", callId, Log.pii(targetNumber),
                            isConfirmationRequired);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.transferCall(call, targetNumber, isConfirmationRequired);
                    } else {
                        Log.w(this, "transferCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void consultativeTransfer(String callId, String otherCallId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_CONSULTATIVE_TRANSFER,
                    mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.i(this, "consultativeTransfer - %s, %s", callId, otherCallId);
                    Call call = mCallIdMapper.getCall(callId);
                    Call otherCall = mCallIdMapper.getCall(otherCallId);
                    if (call != null && otherCall != null) {
                        mCallsManager.transferCall(call, otherCall);
                    } else {
                        Log.w(this, "consultativeTransfer, unknown call id: %s or %s",
                                callId, otherCallId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void playDtmfTone(String callId, char digit) {
        try {
            Log.startSession("ICA.pDT", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "playDtmfTone(%s,%c)", callId, digit);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.playDtmfTone(call, digit);
                    } else {
                        Log.w(this, "playDtmfTone, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void stopDtmfTone(String callId) {
        try {
            Log.startSession("ICA.sDT", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "stopDtmfTone(%s)", callId);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.stopDtmfTone(call);
                    } else {
                        Log.w(this, "stopDtmfTone, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void postDialContinue(String callId, boolean proceed) {
        try {
            Log.startSession("ICA.pDC", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "postDialContinue(%s)", callId);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.postDialContinue(call, proceed);
                    } else {
                        Log.w(this, "postDialContinue, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void disconnectCall(String callId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_DISCONNECT_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.v(this, "disconnectCall: %s", callId);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.disconnectCall(call);
                    } else {
                        Log.w(this, "disconnectCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void holdCall(String callId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_HOLD_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.holdCall(call);
                    } else {
                        Log.w(this, "holdCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void unholdCall(String callId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_UNHOLD_CALL, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.unholdCall(call);
                    } else {
                        Log.w(this, "unholdCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void phoneAccountSelected(String callId, PhoneAccountHandle accountHandle,
            boolean setDefault) {
        try {
            Log.startSession("ICA.pAS", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.phoneAccountSelected(call, accountHandle, setDefault);
                    } else {
                        Log.w(this, "phoneAccountSelected, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void mute(boolean shouldMute) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_MUTE, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    mCallsManager.mute(shouldMute);
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void setAudioRoute(int route, String bluetoothAddress) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_SET_AUDIO_ROUTE, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    mCallsManager.setAudioRoute(route, bluetoothAddress);
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void enterBackgroundAudioProcessing(String callId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_ENTER_AUDIO_PROCESSING,
                    mOwnerPackageAbbreviation);
            // TODO: enforce the extra permission.
            Binder.withCleanCallingIdentity(() -> {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.enterBackgroundAudioProcessing(call, mOwnerPackageName);
                    } else {
                        Log.w(this, "enterBackgroundAudioProcessing, unknown call id: %s", callId);
                    }
                }
            });
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void exitBackgroundAudioProcessing(String callId, boolean shouldRing) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_EXIT_AUDIO_PROCESSING,
                    mOwnerPackageAbbreviation);
            Binder.withCleanCallingIdentity(() -> {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.exitBackgroundAudioProcessing(call, shouldRing);
                    } else {
                        Log.w(InCallAdapter.this,
                                "exitBackgroundAudioProcessing, unknown call id: %s", callId);
                    }
                }
            });
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void conference(String callId, String otherCallId) {
        try {
            Log.startSession(LogUtils.Sessions.ICA_CONFERENCE, mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    Call otherCall = mCallIdMapper.getCall(otherCallId);
                    if (call != null && otherCall != null) {
                        mCallsManager.conference(call, otherCall);
                    } else {
                        Log.w(this, "conference, unknown call id: %s or %s", callId, otherCallId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void splitFromConference(String callId) {
        try {
            Log.startSession("ICA.sFC", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.splitFromConference();
                    } else {
                        Log.w(this, "splitFromConference, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void mergeConference(String callId) {
        try {
            Log.startSession("ICA.mC", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.mergeConference();
                    } else {
                        Log.w(this, "mergeConference, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void swapConference(String callId) {
        try {
            Log.startSession("ICA.sC", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.swapConference();
                    } else {
                        Log.w(this, "swapConference, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void addConferenceParticipants(String callId, List<Uri> participants) {
        try {
            Log.startSession("ICA.aCP", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.addConferenceParticipants(participants);
                    } else {
                        Log.w(this, "addConferenceParticipants, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }


    @Override
    public void pullExternalCall(String callId) {
        try {
            Log.startSession("ICA.pEC", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.pullExternalCall();
                    } else {
                        Log.w(this, "pullExternalCall, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void sendCallEvent(String callId, String event, int targetSdkVer, Bundle extras) {
        try {
            Log.startSession("ICA.sCE", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.sendCallEvent(event, targetSdkVer, extras);
                    } else {
                        Log.w(this, "sendCallEvent, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void putExtras(String callId, Bundle extras) {
        try {
            Log.startSession("ICA.pE", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.putExtras(Call.SOURCE_INCALL_SERVICE, extras);
                    } else {
                        Log.w(this, "putExtras, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void removeExtras(String callId, List<String> keys) {
        try {
            Log.startSession("ICA.rE", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.removeExtras(Call.SOURCE_INCALL_SERVICE, keys);
                    } else {
                        Log.w(this, "removeExtra, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void turnOnProximitySensor() {
        try {
            Log.startSession("ICA.tOnPS", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    mCallsManager.turnOnProximitySensor();
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void turnOffProximitySensor(boolean screenOnImmediately) {
        try {
            Log.startSession("ICA.tOffPS", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    mCallsManager.turnOffProximitySensor(screenOnImmediately);
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
             Log.endSession();
        }
    }

    @Override
    public void sendRttRequest(String callId) {
        try {
            Log.startSession("ICA.sRR");
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.sendRttRequest();
                    } else {
                        Log.w(this, "stopRtt(): call %s not found", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void respondToRttRequest(String callId, int id, boolean accept) {
        try {
            Log.startSession("ICA.rTRR");
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.handleRttRequestResponse(id, accept);
                    } else {
                        Log.w(this, "respondToRttRequest(): call %s not found", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void stopRtt(String callId) {
        try {
            Log.startSession("ICA.sRTT");
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.stopRtt();
                    } else {
                        Log.w(this, "stopRtt(): call %s not found", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void setRttMode(String callId, int mode) {
        try {
            Log.startSession("ICA.sRM");
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    // TODO
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }

    @Override
    public void handoverTo(String callId, PhoneAccountHandle destAcct, int videoState,
                           Bundle extras) {
        try {
            Log.startSession("ICA.hT", mOwnerPackageAbbreviation);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        call.handoverTo(destAcct, videoState, extras);
                    } else {
                        Log.w(this, "handoverTo, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
    }
}