// Generated by CoffeeScript 2.3.2
  // # CSV Generator

  // Please look at the [documentation](https://csv.js.org/generate/) for additional information.
var Generator, stream, util,
  indexOf = [].indexOf;

stream = require('stream');

util = require('util');

// ## Usage  

// Stream API, for maximum of power:

// `generate([options])`

// Callback approach, for ease of use:

// `generate([options], callback)`

// ## Source Code
module.exports = function() {
  var callback, data, generator, options;
  if (arguments.length === 2) {
    options = arguments[0];
    callback = arguments[1];
  } else if (arguments.length === 1) {
    if (typeof arguments[0] === 'function') {
      options = {};
      callback = arguments[0];
    } else {
      options = arguments[0];
    }
  } else if (arguments.length === 0) {
    options = {};
  }
  generator = new Generator(options);
  if (callback) {
    data = [];
    generator.on('readable', function() {
      var d, results;
      results = [];
      while (d = generator.read()) {
        results.push(data.push(d));
      }
      return results;
    });
    generator.on('error', callback);
    generator.on('end', function() {
      if (!generator.options.objectMode) {
        if (generator.options.encoding) {
          data = data.join('');
        } else {
          data = Buffer.concat(data);
        }
      }
      return callback(null, data);
    });
  }
  return generator;
};

// ## `Generator([options])`

// Feel free to ask for new features and to participate by writting issues and preparing push requests.

// Options are documented [here](http://csv.js.org/generate/options/).
Generator = function(options = {}) {
  var accepted_header_types, base, base1, base10, base11, base2, base3, base4, base5, base6, base7, base8, base9, i, j, k, len, ref, v;
  if (options.high_water_mark) {
    // Convert Stream Readable options if underscored
    options.highWaterMark = options.high_water_mark;
  }
  if (options.object_mode) {
    options.objectMode = options.object_mode;
  }
  // Call parent constructor
  stream.Readable.call(this, options);
  // Clone and camelize options
  this.options = {};
  for (k in options) {
    v = options[k];
    this.options[Generator.camelize(k)] = v;
  }
  // Normalize options
  if ((base = this.options).columns == null) {
    base.columns = 8;
  }
  if ((base1 = this.options).delimiter == null) {
    base1.delimiter = ',';
  }
  if ((base2 = this.options).duration == null) {
    base2.duration = null;
  }
  if ((base3 = this.options).encoding == null) {
    base3.encoding = null;
  }
  if ((base4 = this.options).end == null) {
    base4.end = null;
  }
  if ((base5 = this.options).eof == null) {
    base5.eof = false;
  }
  if ((base6 = this.options).fixedSize == null) {
    base6.fixedSize = false;
  }
  if ((base7 = this.options).length == null) {
    base7.length = -1;
  }
  if ((base8 = this.options).maxWordLength == null) {
    base8.maxWordLength = 16;
  }
  if ((base9 = this.options).rowDelimiter == null) {
    base9.rowDelimiter = '\n';
  }
  if ((base10 = this.options).seed == null) {
    base10.seed = false;
  }
  if ((base11 = this.options).sleep == null) {
    base11.sleep = 0;
  }
  if (this.options.eof === true) {
    // Default values
    this.options.eof = this.options.rowDelimiter;
  }
  // State
  this._ = {
    start_time: this.options.duration ? Date.now() : null,
    fixed_size_buffer: '',
    count_written: 0,
    count_created: 0
  };
  if (typeof this.options.columns === 'number') {
    this.options.columns = new Array(this.options.columns);
  }
  accepted_header_types = Object.keys(Generator).filter(function(t) {
    return t !== 'super_' && t !== 'camelize';
  });
  ref = this.options.columns;
  for (i = j = 0, len = ref.length; j < len; i = ++j) {
    v = ref[i];
    if (v == null) {
      v = 'ascii';
    }
    if (typeof v === 'string') {
      if (indexOf.call(accepted_header_types, v) < 0) {
        throw Error(`Invalid column type: got "${v}", default values are ${JSON.stringify(accepted_header_types)}`);
      }
      this.options.columns[i] = Generator[v];
    }
  }
  return this;
};

util.inherits(Generator, stream.Readable);

module.exports.Generator = Generator;

// ## `Generator.prototype.random()`

// Generate a random number between 0 and 1 with 2 decimals. The function is idempotent if it detect the "seed" option.
Generator.prototype.random = function() {
  if (this.options.seed) {
    return this.options.seed = this.options.seed * Math.PI * 100 % 100 / 100;
  } else {
    return Math.random();
  }
};

// ## `Generator.prototype.end()`

// Stop the generation.
Generator.prototype.end = function() {
  return this.push(null);
};

// ## `Generator.prototype._read(size)`

// Put new data into the read queue.
Generator.prototype._read = function(size) {
  var column, data, header, j, l, len, len1, len2, len3, length, line, lineLength, m, n, ref;
  // Already started
  data = [];
  length = this._.fixed_size_buffer.length;
  if (length) {
    data.push(this._.fixed_size_buffer);
  }
  while (true) {
    // Time for some rest: flush first and stop later
    if ((this._.count_created === this.options.length) || (this.options.end && Date.now() > this.options.end) || (this.options.duration && Date.now() > this._.start_time + this.options.duration)) {
      // Flush
      if (data.length) {
        if (this.options.objectMode) {
          for (j = 0, len = data.length; j < len; j++) {
            line = data[j];
            this.__push(line);
          }
        } else {
          this.__push(data.join('') + (this.options.eof ? this.options.eof : ''));
        }
      }
      // Stop
      return this.push(null);
    }
    // Create the line
    line = [];
    ref = this.options.columns;
    for (l = 0, len1 = ref.length; l < len1; l++) {
      header = ref[l];
      // Create the field
      line.push(`${header(this)}`);
    }
    // Obtain line length
    if (this.options.objectMode) {
      lineLength = 0;
      for (m = 0, len2 = line.length; m < len2; m++) {
        column = line[m];
        lineLength += column.length;
      }
    } else {
      // Stringify the line
      line = `${(this._.count_created === 0 ? '' : this.options.rowDelimiter)}${line.join(this.options.delimiter)}`;
      lineLength = line.length;
    }
    this._.count_created++;
    if (length + lineLength > size) {
      if (this.options.objectMode) {
        data.push(line);
        for (n = 0, len3 = data.length; n < len3; n++) {
          line = data[n];
          this.__push(line);
        }
      } else {
        if (this.options.fixedSize) {
          this._.fixed_size_buffer = line.substr(size - length);
          data.push(line.substr(0, size - length));
        } else {
          data.push(line);
        }
        this.__push(data.join(''));
      }
      break;
    }
    length += lineLength;
    data.push(line);
  }
};

// ## `Generator.prototype._read(size)`

// Put new data into the read queue.
Generator.prototype.__push = function(record) {
  this._.count_written++;
  if (this.options.sleep > 0) {
    return setTimeout(() => {
      return this.push(record);
    }, this.options.sleep);
  } else {
    return this.push(record);
  }
};

// ## `Generator.ascii(gen)`

// Generate an ASCII value.
Generator.ascii = function(gen) {
  var _, char, column, j, nb_chars, ref;
  // Column
  column = [];
  nb_chars = Math.ceil(gen.random() * gen.options.maxWordLength);
  for (_ = j = 0, ref = nb_chars; (0 <= ref ? j < ref : j > ref); _ = 0 <= ref ? ++j : --j) {
    char = Math.floor(gen.random() * 32);
    column.push(String.fromCharCode(char + (char < 16 ? 65 : 97 - 16)));
  }
  return column.join('');
};

// ## `Generator.ascii(gen)`

// Generate an integer value.
Generator.int = function(gen) {
  return Math.floor(gen.random() * Math.pow(2, 52));
};

// ## `Generator.bool(gen)`

// Generate an boolean value.
Generator.bool = function(gen) {
  return Math.floor(gen.random() * 2);
};

// ## `Generator.camelize`
Generator.camelize = function(str) {
  return str.replace(/_([a-z])/gi, function(_, match, index) {
    return match.toUpperCase();
  });
};