/*
 * Copyright (C) 2019 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.car.telephony.common;

import android.net.Uri;
import android.telecom.Call;
import android.telecom.DisconnectCause;
import android.telecom.GatewayInfo;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

/**
 * Represents details of {@link Call.Details}.
 */
public class CallDetail {
    private final String mNumber;
    private final CharSequence mDisconnectCause;
    private final Uri mGatewayInfoOriginalAddress;
    private final long mConnectTimeMillis;

    private CallDetail(String number, CharSequence disconnectCause,
                       Uri gatewayInfoOriginalAddress, long connectTimeMillis) {
        mNumber = number;
        mDisconnectCause = disconnectCause;
        mGatewayInfoOriginalAddress = gatewayInfoOriginalAddress;
        this.mConnectTimeMillis = connectTimeMillis;
    }

    /**
     * Creates an instance of {@link CallDetail} from a {@link Call.Details}.
     */
    public static CallDetail fromTelecomCallDetail(@Nullable Call.Details callDetail) {
        return new CallDetail(getNumber(callDetail), getDisconnectCause(callDetail),
                getGatewayInfoOriginalAddress(callDetail), getConnectTimeMillis(callDetail));
    }

    /**
     * Returns the phone number. Returns empty string if phone number is not available.
     */
    @NonNull
    public String getNumber() {
        return mNumber;
    }

    /**
     * Returns a descriptive reason of disconnect cause.
     */
    @Nullable
    public CharSequence getDisconnectCause() {
        return mDisconnectCause;
    }

    /**
     * Returns the address that the user is trying to connect to via the gateway.
     */
    @Nullable
    public Uri getGatewayInfoOriginalAddress() {
        return mGatewayInfoOriginalAddress;
    }

    /**
     * Returns the timestamp when the call is connected. Returns 0 if detail is not available.
     */
    public long getConnectTimeMillis() {
        return mConnectTimeMillis;
    }

    private static String getNumber(Call.Details callDetail) {
        String number = "";
        if (callDetail == null) {
            return number;
        }

        GatewayInfo gatewayInfo = callDetail.getGatewayInfo();
        if (gatewayInfo != null) {
            number = gatewayInfo.getOriginalAddress().getSchemeSpecificPart();
        } else if (callDetail.getHandle() != null) {
            number = callDetail.getHandle().getSchemeSpecificPart();
        }
        return number;
    }

    @Nullable
    private static CharSequence getDisconnectCause(Call.Details callDetail) {
        DisconnectCause cause = callDetail == null ? null : callDetail.getDisconnectCause();
        return cause == null ? null : cause.getLabel();
    }

    @Nullable
    private static Uri getGatewayInfoOriginalAddress(Call.Details callDetail) {
        return callDetail != null && callDetail.getGatewayInfo() != null
                ? callDetail.getGatewayInfo().getOriginalAddress()
                : null;
    }

    private static long getConnectTimeMillis(Call.Details callDetail) {
        if (callDetail != null) {
            return callDetail.getConnectTimeMillis();
        } else {
            return 0;
        }
    }
}