/*
 * 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.internal.telephony;

import static com.android.internal.telephony.TelephonyProperties.PROPERTY_DEFAULT_SUBSCRIPTION;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.LocalServerSocket;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.telephony.Rlog;
import android.telephony.SubscriptionManager;
import android.telephony.TelephonyManager;

import com.android.internal.telephony.cdma.CDMALTEPhone;
import com.android.internal.telephony.cdma.CDMAPhone;
import com.android.internal.telephony.cdma.CdmaSubscriptionSourceManager;
import com.android.internal.telephony.dataconnection.DctController;
import com.android.internal.telephony.gsm.GSMPhone;
import com.android.internal.telephony.SubscriptionInfoUpdater;
import com.android.internal.telephony.imsphone.ImsPhone;
import com.android.internal.telephony.imsphone.ImsPhoneFactory;
import com.android.internal.telephony.sip.SipPhone;
import com.android.internal.telephony.sip.SipPhoneFactory;
import com.android.internal.telephony.uicc.IccCardProxy;
import com.android.internal.telephony.uicc.UiccController;

import java.io.FileDescriptor;
import java.io.PrintWriter;

/**
 * {@hide}
 */
public class PhoneFactory {
    static final String LOG_TAG = "PhoneFactory";
    static final int SOCKET_OPEN_RETRY_MILLIS = 2 * 1000;
    static final int SOCKET_OPEN_MAX_RETRY = 3;

    //***** Class Variables

    // lock sLockProxyPhones protects both sProxyPhones and sProxyPhone
    final static Object sLockProxyPhones = new Object();
    static private PhoneProxy[] sProxyPhones = null;
    static private PhoneProxy sProxyPhone = null;

    static private CommandsInterface[] sCommandsInterfaces = null;

    static private ProxyController mProxyController;
    static private UiccController mUiccController;

    static private CommandsInterface sCommandsInterface = null;
    static private SubscriptionInfoUpdater sSubInfoRecordUpdater = null;

    static private boolean sMadeDefaults = false;
    static private PhoneNotifier sPhoneNotifier;
    static private Context sContext;

    //***** Class Methods

    public static void makeDefaultPhones(Context context) {
        makeDefaultPhone(context);
    }

    /**
     * FIXME replace this with some other way of making these
     * instances
     */
    public static void makeDefaultPhone(Context context) {
        synchronized (sLockProxyPhones) {
            if (!sMadeDefaults) {
                sContext = context;

                // create the telephony device controller.
                TelephonyDevController.create();

                int retryCount = 0;
                for(;;) {
                    boolean hasException = false;
                    retryCount ++;

                    try {
                        // use UNIX domain socket to
                        // prevent subsequent initialization
                        new LocalServerSocket("com.android.internal.telephony");
                    } catch (java.io.IOException ex) {
                        hasException = true;
                    }

                    if ( !hasException ) {
                        break;
                    } else if (retryCount > SOCKET_OPEN_MAX_RETRY) {
                        throw new RuntimeException("PhoneFactory probably already running");
                    } else {
                        try {
                            Thread.sleep(SOCKET_OPEN_RETRY_MILLIS);
                        } catch (InterruptedException er) {
                        }
                    }
                }

                sPhoneNotifier = new DefaultPhoneNotifier();

                int cdmaSubscription = CdmaSubscriptionSourceManager.getDefault(context);
                Rlog.i(LOG_TAG, "Cdma Subscription set to " + cdmaSubscription);

                /* In case of multi SIM mode two instances of PhoneProxy, RIL are created,
                   where as in single SIM mode only instance. isMultiSimEnabled() function checks
                   whether it is single SIM or multi SIM mode */
                int numPhones = TelephonyManager.getDefault().getPhoneCount();
                int[] networkModes = new int[numPhones];
                sProxyPhones = new PhoneProxy[numPhones];
                sCommandsInterfaces = new RIL[numPhones];

                for (int i = 0; i < numPhones; i++) {
                    // reads the system properties and makes commandsinterface
                    // Get preferred network type.
                    networkModes[i] = RILConstants.PREFERRED_NETWORK_MODE;

                    Rlog.i(LOG_TAG, "Network Mode set to " + Integer.toString(networkModes[i]));
                    sCommandsInterfaces[i] = new RIL(context, networkModes[i],
                            cdmaSubscription, i);
                }
                Rlog.i(LOG_TAG, "Creating SubscriptionController");
                SubscriptionController.init(context, sCommandsInterfaces);

                // Instantiate UiccController so that all other classes can just
                // call getInstance()
                mUiccController = UiccController.make(context, sCommandsInterfaces);

                for (int i = 0; i < numPhones; i++) {
                    PhoneBase phone = null;
                    int phoneType = TelephonyManager.getPhoneType(networkModes[i]);
                    if (phoneType == PhoneConstants.PHONE_TYPE_GSM) {
                        phone = new GSMPhone(context,
                                sCommandsInterfaces[i], sPhoneNotifier, i);
                    } else if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
                        phone = new CDMALTEPhone(context,
                                sCommandsInterfaces[i], sPhoneNotifier, i);
                    }
                    Rlog.i(LOG_TAG, "Creating Phone with type = " + phoneType + " sub = " + i);

                    sProxyPhones[i] = new PhoneProxy(phone);
                }
                mProxyController = ProxyController.getInstance(context, sProxyPhones,
                        mUiccController, sCommandsInterfaces);

                // Set the default phone in base class.
                // FIXME: This is a first best guess at what the defaults will be. It
                // FIXME: needs to be done in a more controlled manner in the future.
                sProxyPhone = sProxyPhones[0];
                sCommandsInterface = sCommandsInterfaces[0];

                // Ensure that we have a default SMS app. Requesting the app with
                // updateIfNeeded set to true is enough to configure a default SMS app.
                ComponentName componentName =
                        SmsApplication.getDefaultSmsApplication(context, true /* updateIfNeeded */);
                String packageName = "NONE";
                if (componentName != null) {
                    packageName = componentName.getPackageName();
                }
                Rlog.i(LOG_TAG, "defaultSmsApplication: " + packageName);

                // Set up monitor to watch for changes to SMS packages
                SmsApplication.initSmsPackageMonitor(context);

                sMadeDefaults = true;

                Rlog.i(LOG_TAG, "Creating SubInfoRecordUpdater ");
                sSubInfoRecordUpdater = new SubscriptionInfoUpdater(context,
                        sProxyPhones, sCommandsInterfaces);
                SubscriptionController.getInstance().updatePhonesAvailability(sProxyPhones);
            }
        }
    }

    public static Phone getCdmaPhone(int phoneId) {
        Phone phone;
        synchronized(PhoneProxy.lockForRadioTechnologyChange) {
            phone = new CDMALTEPhone(sContext, sCommandsInterfaces[phoneId],
                    sPhoneNotifier, phoneId);
        }
        return phone;
    }

    public static Phone getGsmPhone(int phoneId) {
        synchronized(PhoneProxy.lockForRadioTechnologyChange) {
            Phone phone = new GSMPhone(sContext, sCommandsInterfaces[phoneId],
                    sPhoneNotifier, phoneId);
            return phone;
        }
    }

    public static Phone getDefaultPhone() {
        synchronized (sLockProxyPhones) {
            if (!sMadeDefaults) {
                throw new IllegalStateException("Default phones haven't been made yet!");
            }
            return sProxyPhone;
        }
    }

    public static Phone getPhone(int phoneId) {
        Phone phone;
        String dbgInfo = "";

        synchronized (sLockProxyPhones) {
            if (!sMadeDefaults) {
                throw new IllegalStateException("Default phones haven't been made yet!");
                // CAF_MSIM FIXME need to introduce default phone id ?
            } else if (phoneId == SubscriptionManager.DEFAULT_PHONE_INDEX) {
                dbgInfo = "phoneId == DEFAULT_PHONE_ID return sProxyPhone";
                phone = sProxyPhone;
            } else {
                dbgInfo = "phoneId != DEFAULT_PHONE_ID return sProxyPhones[phoneId]";
                phone = (((phoneId >= 0)
                                && (phoneId < TelephonyManager.getDefault().getPhoneCount()))
                        ? sProxyPhones[phoneId] : null);
            }
            Rlog.d(LOG_TAG, "getPhone:- " + dbgInfo + " phoneId=" + phoneId + " phone=" + phone);
            return phone;
        }
    }

    public static Phone[] getPhones() {
        synchronized (sLockProxyPhones) {
            if (!sMadeDefaults) {
                throw new IllegalStateException("Default phones haven't been made yet!");
            }
            return sProxyPhones;
        }
    }

    /**
     * Makes a {@link SipPhone} object.
     * @param sipUri the local SIP URI the phone runs on
     * @return the {@code SipPhone} object or null if the SIP URI is not valid
     */
    public static SipPhone makeSipPhone(String sipUri) {
        return SipPhoneFactory.makePhone(sipUri, sContext, sPhoneNotifier);
    }

    /* Sets the default subscription. If only one phone instance is active that
     * subscription is set as default subscription. If both phone instances
     * are active the first instance "0" is set as default subscription
     */
    public static void setDefaultSubscription(int subId) {
        SystemProperties.set(PROPERTY_DEFAULT_SUBSCRIPTION, Integer.toString(subId));
        int phoneId = SubscriptionController.getInstance().getPhoneId(subId);

        synchronized (sLockProxyPhones) {
            // Set the default phone in base class
            if (phoneId >= 0 && phoneId < sProxyPhones.length) {
                sProxyPhone = sProxyPhones[phoneId];
                sCommandsInterface = sCommandsInterfaces[phoneId];
                sMadeDefaults = true;
            }
        }

        // Update MCC MNC device configuration information
        String defaultMccMnc = TelephonyManager.getDefault().getSimOperator(phoneId);
        Rlog.d(LOG_TAG, "update mccmnc=" + defaultMccMnc);
        MccTable.updateMccMncConfiguration(sContext, defaultMccMnc, false);

        // Broadcast an Intent for default sub change
        Intent intent = new Intent(TelephonyIntents.ACTION_DEFAULT_SUBSCRIPTION_CHANGED);
        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
        SubscriptionManager.putPhoneIdAndSubIdExtra(intent, phoneId);
        Rlog.d(LOG_TAG, "setDefaultSubscription : " + subId
                + " Broadcasting Default Subscription Changed...");
        sContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
    }

    /**
     * Returns the preferred network type that should be set in the modem.
     *
     * @param context The current {@link Context}.
     * @return the preferred network mode that should be set.
     */
    // TODO: Fix when we "properly" have TelephonyDevController/SubscriptionController ..
    public static int calculatePreferredNetworkType(Context context, int phoneSubId) {
        int networkType = android.provider.Settings.Global.getInt(context.getContentResolver(),
                android.provider.Settings.Global.PREFERRED_NETWORK_MODE + phoneSubId,
                RILConstants.PREFERRED_NETWORK_MODE);
        Rlog.d(LOG_TAG, "calculatePreferredNetworkType: phoneSubId = " + phoneSubId +
                " networkType = " + networkType);
        return networkType;
    }

    /* Gets the default subscription */
    public static int getDefaultSubscription() {
        return SubscriptionController.getInstance().getDefaultSubId();
    }

    /* Gets User preferred Voice subscription setting*/
    public static int getVoiceSubscription() {
        int subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;

        try {
            subId = Settings.Global.getInt(sContext.getContentResolver(),
                    Settings.Global.MULTI_SIM_VOICE_CALL_SUBSCRIPTION);
        } catch (SettingNotFoundException snfe) {
            Rlog.e(LOG_TAG, "Settings Exception Reading Dual Sim Voice Call Values");
        }

        return subId;
    }

    /* Returns User Prompt property,  enabed or not */
    public static boolean isPromptEnabled() {
        boolean prompt = false;
        int value = 0;
        try {
            value = Settings.Global.getInt(sContext.getContentResolver(),
                    Settings.Global.MULTI_SIM_VOICE_PROMPT);
        } catch (SettingNotFoundException snfe) {
            Rlog.e(LOG_TAG, "Settings Exception Reading Dual Sim Voice Prompt Values");
        }
        prompt = (value == 0) ? false : true ;
        Rlog.d(LOG_TAG, "Prompt option:" + prompt);

       return prompt;
    }

    /*Sets User Prompt property,  enabed or not */
    public static void setPromptEnabled(boolean enabled) {
        int value = (enabled == false) ? 0 : 1;
        Settings.Global.putInt(sContext.getContentResolver(),
                Settings.Global.MULTI_SIM_VOICE_PROMPT, value);
        Rlog.d(LOG_TAG, "setVoicePromptOption to " + enabled);
    }

    /* Returns User SMS Prompt property,  enabled or not */
    public static boolean isSMSPromptEnabled() {
        boolean prompt = false;
        int value = 0;
        try {
            value = Settings.Global.getInt(sContext.getContentResolver(),
                    Settings.Global.MULTI_SIM_SMS_PROMPT);
        } catch (SettingNotFoundException snfe) {
            Rlog.e(LOG_TAG, "Settings Exception Reading Dual Sim SMS Prompt Values");
        }
        prompt = (value == 0) ? false : true ;
        Rlog.d(LOG_TAG, "SMS Prompt option:" + prompt);

       return prompt;
    }

    /*Sets User SMS Prompt property,  enable or not */
    public static void setSMSPromptEnabled(boolean enabled) {
        int value = (enabled == false) ? 0 : 1;
        Settings.Global.putInt(sContext.getContentResolver(),
                Settings.Global.MULTI_SIM_SMS_PROMPT, value);
        Rlog.d(LOG_TAG, "setSMSPromptOption to " + enabled);
    }

    /* Gets User preferred Data subscription setting*/
    public static long getDataSubscription() {
        int subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;

        try {
            subId = Settings.Global.getInt(sContext.getContentResolver(),
                    Settings.Global.MULTI_SIM_DATA_CALL_SUBSCRIPTION);
        } catch (SettingNotFoundException snfe) {
            Rlog.e(LOG_TAG, "Settings Exception Reading Dual Sim Data Call Values");
        }

        return subId;
    }

    /* Gets User preferred SMS subscription setting*/
    public static int getSMSSubscription() {
        int subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
        try {
            subId = Settings.Global.getInt(sContext.getContentResolver(),
                    Settings.Global.MULTI_SIM_SMS_SUBSCRIPTION);
        } catch (SettingNotFoundException snfe) {
            Rlog.e(LOG_TAG, "Settings Exception Reading Dual Sim SMS Values");
        }

        return subId;
    }

    /**
     * Makes a {@link ImsPhone} object.
     * @return the {@code ImsPhone} object or null if the exception occured
     */
    public static ImsPhone makeImsPhone(PhoneNotifier phoneNotifier, Phone defaultPhone) {
        return ImsPhoneFactory.makePhone(sContext, phoneNotifier, defaultPhone);
    }

    public static void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        pw.println("PhoneFactory:");
        PhoneProxy [] phones = (PhoneProxy[])PhoneFactory.getPhones();
        int i = -1;
        for(PhoneProxy phoneProxy : phones) {
            PhoneBase phoneBase;
            i += 1;

            try {
                phoneBase = (PhoneBase)phoneProxy.getActivePhone();
                phoneBase.dump(fd, pw, args);
            } catch (Exception e) {
                pw.println("Telephony DebugService: Could not get Phone[" + i + "] e=" + e);
                continue;
            }

            pw.flush();
            pw.println("++++++++++++++++++++++++++++++++");

            try {
                ((IccCardProxy)phoneProxy.getIccCard()).dump(fd, pw, args);
            } catch (Exception e) {
                e.printStackTrace();
            }
            pw.flush();
            pw.println("++++++++++++++++++++++++++++++++");
        }

        try {
            DctController.getInstance().dump(fd, pw, args);
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            mUiccController.dump(fd, pw, args);
        } catch (Exception e) {
            e.printStackTrace();
        }
        pw.flush();
        pw.println("++++++++++++++++++++++++++++++++");

        try {
            SubscriptionController.getInstance().dump(fd, pw, args);
        } catch (Exception e) {
            e.printStackTrace();
        }
        pw.flush();
    }
}