'use strict';

var bitcore = require('bitcore-lib');
var _ = bitcore.deps._;
var colors = require('colors/safe');

/**
 * Wraps console.log with some special magic
 * @constructor
 */
function Logger(options) {
  if (!options) {
    options = {};
  }
  this.formatting = _.isUndefined(options.formatting) ? Logger.DEFAULT_FORMATTING : options.formatting;
  this.level = options.logLevel || process.env['LOG_LEVEL'] || 0; // lower numbers means less logs
}

Logger.DEFAULT_FORMATTING = true;

/**
 * Prints an info message
 * #info
 */
Logger.prototype.info = function() {
  this._log.apply(this, ['blue', 'info'].concat(Array.prototype.slice.call(arguments)));
};

/**
 * Prints an error message
 * #error
 */
Logger.prototype.error = function() {
  var existingPermitWrites = this.permitWrites;
  this._log.apply(this, ['red', 'error'].concat(Array.prototype.slice.call(arguments)));
};

/**
 * Prints an debug message
 * #debug
 */
Logger.prototype.debug = function() {
  if (this.level >= 1) {
    this._log.apply(this, ['magenta', 'debug'].concat(Array.prototype.slice.call(arguments)));
  }
};

/**
 * Prints an debug2 message
 * #debug2
 */
Logger.prototype.debug2 = function() {
  if (this.level >= 2) {
    this._log.apply(this, ['green', 'debug'].concat(Array.prototype.slice.call(arguments)));
  }
};

/**
 * Prints an debug3 message
 * #debug3
 */
Logger.prototype.debug3 = function() {
  if (this.level >= 3) {
    this._log.apply(this, ['cyan', 'debug'].concat(Array.prototype.slice.call(arguments)));
  }
};

/**
 * Prints an warn message
 * #warn
 */
Logger.prototype.warn = function() {
  this._log.apply(this, ['yellow', 'warn'].concat(Array.prototype.slice.call(arguments)));
};

/**
 * Proxies console.log with color and arg parsing magic
 * #_log
 */
Logger.prototype._log = function(color) {
  var args = Array.prototype.slice.call(arguments);
  args = args.slice(1);
  var level = args.shift();

  if (this.formatting) {
    var date = new Date();
    var typeString = colors[color].italic(level + ':');
    args[0] = '[' + date.toISOString() + ']' + ' ' + typeString + ' ' + args[0];
  }
  var fn = console[level] || console.log;
  fn.apply(console, args);
};

module.exports = Logger;