/*
 * Copyright (C) 2014 Xiao-Long Chen <chillermillerlong@hotmail.com>
 *
 * 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.dialer.lookup.opencnam;

import android.content.Context;
import android.net.Uri;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;

import com.android.dialer.phonenumbercache.ContactInfo;
import com.android.dialer.lookup.ContactBuilder;
import com.android.dialer.lookup.LookupSettings;
import com.android.dialer.lookup.LookupUtils;
import com.android.dialer.lookup.ReverseLookup;

import java.io.IOException;

public class OpenCnamReverseLookup extends ReverseLookup {
  private static final String TAG = OpenCnamReverseLookup.class.getSimpleName();

  private static final boolean DEBUG = false;

  private static final String LOOKUP_URL = "https://api.opencnam.com/v2/phone/";

  /** Query parameters for paid accounts */
  private static final String ACCOUNT_SID = "account_sid";
  private static final String AUTH_TOKEN = "auth_token";

  public OpenCnamReverseLookup(Context context) {
  }

  /**
   * Perform phone number lookup.
   *
   * @param context The application context
   * @param normalizedNumber The normalized phone number
   * @param formattedNumber The formatted phone number
   * @return The phone number info object
   */
  @Override
  public ContactInfo lookupNumber(Context context,
      String normalizedNumber, String formattedNumber) throws IOException {
    if (normalizedNumber.startsWith("+") && !normalizedNumber.startsWith("+1")) {
      // Any non-US number will return "We currently accept only US numbers"
      return null;
    }

    String displayName = httpGetRequest(context, normalizedNumber);
    if (DEBUG) Log.d(TAG, "Reverse lookup returned name: " + displayName);

    // Check displayName. The free tier of the service will return the
    // following for some numbers:
    // "CNAM for phone "NORMALIZED" is currently unavailable for Hobbyist Tier users."

    if (displayName.contains("Hobbyist Tier")) {
      return null;
    }

    String number = formattedNumber != null ? formattedNumber : normalizedNumber;

    return ContactBuilder.forReverseLookup(normalizedNumber, formattedNumber)
        .setName(ContactBuilder.Name.createDisplayName(displayName))
        .addPhoneNumber(ContactBuilder.PhoneNumber.createMainNumber(number))
        .setPhotoUri(ContactBuilder.PHOTO_URI_BUSINESS)
        .build();
  }

  private String httpGetRequest(Context context, String number) throws IOException {
    Uri.Builder builder = Uri.parse(LOOKUP_URL + number).buildUpon();

    // Paid account
    String accountSid = LookupSettings.getOpenCnamAccountSid(context);
    String authToken = LookupSettings.getOpenCnamAuthToken(context);

    if (!TextUtils.isEmpty(accountSid) && !TextUtils.isEmpty(authToken)) {
      Log.d(TAG, "Using paid account");

      builder.appendQueryParameter(ACCOUNT_SID, accountSid);
      builder.appendQueryParameter(AUTH_TOKEN, authToken);
    }

    return LookupUtils.httpGet(builder.build().toString(), null);
  }
}