/*
 * Copyright 2000-2012 JetBrains s.r.o.
 *
 * 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.intellij.diagnostic;

import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.vfs.CharsetToolkit;
import org.apache.http.client.fluent.Request;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

class DevelopersLoader {
  private static final String DEVELOPERS_LIST_URL = "http://ea-engine.labs.intellij.net/data?category=developers";
  public static final int TIMEOUT = 1000;

  private DevelopersLoader() {
  }

  public static Collection<Developer> fetchDevelopers(ProgressIndicator indicator) throws IOException {
    List<Developer> developers = new LinkedList<Developer>();
    developers.add(Developer.NULL);
    BufferedReader reader = new BufferedReader(
      new InputStreamReader(Request.Get(DEVELOPERS_LIST_URL).connectTimeout(TIMEOUT).execute().returnContent().asStream(),
                            CharsetToolkit.UTF8_CHARSET));
    try {
      while (true) {
        String line = reader.readLine();
        if (line == null) break;
        int i = line.indexOf('\t');
        if (i == -1) throw new IOException("Protocol error");
        int id = Integer.parseInt(line.substring(0, i));
        String name = line.substring(i + 1);
        developers.add(new Developer(id, name));
        indicator.checkCanceled();
      }
      return developers;
    }
    finally {
      reader.close();
    }
  }
}