/**
 * @license
 * Copyright 2016 Google Inc. All rights reserved.
 *
 * 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.
 */
'use strict';

const debug = require('debug');
const EventEmitter = require('events').EventEmitter;

function setLevel(level) {
  if (level === 'verbose') {
    debug.enable('*');
  } else if (level === 'error') {
    debug.enable('*:error');
  } else {
    debug.enable('*, -*:verbose');
  }
}

const loggers = {};
function _log(title, logargs) {
  const args = [...logargs].slice(1);
  if (!loggers[title]) {
    loggers[title] = debug(title);
  }
  return loggers[title](...args);
}

class Emitter extends EventEmitter {
  /**
   * Fires off all status updates. Listen with
   * `require('lib/log').events.addListener('status', callback)`
   */
  issueStatus(title, args) {
    if (title === 'status' || title === 'statusEnd') {
      this.emit(title, args);
    }
  }

  /**
   * Fires off all warnings. Listen with
   * `require('lib/log').events.addListener('warning', callback)`
   */
  issueWarning(args) {
    this.emit('warning', args);
  }
}

/**
 * A simple formatting utility for event logging.
 * @param {string} prefix
 * @param {!Object} data A JSON-serializable object of event data to log.
 * @param {string=} level Optional logging level. Defaults to 'log'.
 */
function formatProtocol(prefix, data, level) {
  const columns = (!process || process.browser) ? Infinity : process.stdout.columns;
  const maxLength = columns - data.method.length - prefix.length - 18;
  // IO.read blacklisted here to avoid logging megabytes of trace data
  const snippet = (data.params && data.method !== 'IO.read') ?
      JSON.stringify(data.params).substr(0, maxLength) : '';
  level = level || 'log';
  _log(`${prefix}:${level}`, prefix, data.method, snippet);
}

module.exports = {
  setLevel,
  formatProtocol,
  events: new Emitter(),
  log(title) {
    this.events.issueStatus(title, arguments);
    return _log(title, arguments);
  },

  warn(title) {
    this.events.issueWarning(arguments);
    return _log(`${title}:warn`, arguments);
  },

  error(title) {
    return _log(`${title}:error`, arguments);
  },

  verbose(title) {
    this.events.issueStatus(title, arguments);
    return _log(`${title}:verbose`, arguments);
  }
};

@@ -723,16 +723,77 @@
 itter;%0A%0A
+const loggersByTitle = %7B%7D;%0Aconst loggingBufferColumns = 25;%0A%0A
 function
@@ -813,29 +813,41 @@
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+switch
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+) %7B%0A    case
  'verbos
@@ -848,20 +848,20 @@
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-) %7B%0A
+:%0A  
     debu
@@ -881,36 +881,35 @@
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+    break;%0A    case
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@@ -904,20 +904,20 @@
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+:%0A  
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@@ -943,17 +943,34 @@
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-%7D else %7B%0A
+    break;%0A    default:%0A  
     
@@ -1011,28 +1011,8 @@
 %0A%7D%0A%0A
-const loggers = %7B%7D;%0A
 func
@@ -1028,16 +1028,19 @@
 (title, 
+...
 logargs)
@@ -1045,46 +1045,8 @@
 s) %7B
-%0A  const args = %5B...logargs%5D.slice(1);
 %0A  i
@@ -1052,24 +1052,31 @@
 if (!loggers
+ByTitle
 %5Btitle%5D) %7B%0A 
@@ -1081,24 +1081,31 @@
 %0A    loggers
+ByTitle
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@@ -1136,16 +1136,23 @@
  loggers
+ByTitle
 %5Btitle%5D(
@@ -1154,16 +1154,19 @@
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+log
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@@ -2064,10 +2064,28 @@
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+loggingBufferColumns
 ;%0A  
@@ -2335,16 +2335,8 @@
 l%7D%60,
- prefix,
  dat
@@ -2439,24 +2439,33 @@
 %0A  log(title
+, ...args
 ) %7B%0A    this
@@ -2487,32 +2487,30 @@
 atus(title, 
+...
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 s);%0A    retu
@@ -2520,32 +2520,30 @@
 _log(title, 
+...
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-ument
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@@ -2548,24 +2548,33 @@
   warn(title
+, ...args
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@@ -2594,24 +2594,29 @@
 Warning(
-argument
+title, ...arg
 s);%0A    
@@ -2644,24 +2644,22 @@
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+...
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@@ -2669,24 +2669,33 @@
  error(title
+, ...args
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@@ -2720,24 +2720,22 @@
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+...
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@@ -2751,16 +2751,25 @@
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+, ...args
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@@ -2799,24 +2799,22 @@
 (title, 
+...
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-ument
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@@ -2849,16 +2849,14 @@
 e%60, 
+...
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-ument
 s);%0A

fix spread strings