// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

function MockRowProvider(document, count) {
  this.document_ = document;
  this.rows_ = new Array();
  this.rows_.length = count;

  this.rowNodeCache_ = null;

  this.callCounts_ = {
    getRowNode: 0
  };
}

MockRowProvider.prototype.resetCallCount = function(name) {
  this.callCounts_[name] = 0;
};

MockRowProvider.prototype.getCallCount = function(name) {
  if (!(name in this.callCounts_))
    throw 'Unknown name: ' + name;

  return this.callCounts_[name];
};

MockRowProvider.prototype.addCallCount = function(name) {
  if (!(name in this.callCounts_)) {
    this.callCounts_[name] = 1;
  } else {
    this.callCounts_[name]++;
  }
};

MockRowProvider.prototype.setCacheEnabled = function(state) {
  this.rowNodeCache_ = state ? {} : null;
};

MockRowProvider.prototype.getRowCount = function() {
  return this.rows_.length;
};

MockRowProvider.prototype.getRowRecord_ = function(index) {
  if (index < 0 || index >= this.rows_.length)
    throw 'Index out of bounds: ' + index;

  if (!this.rows_[index]) {
    this.rows_[index] = {
      html:
      '<x-state data-fg=7 data-bg=0>This is line ' + index +
      '</x-state>' +
      '<x-state data-fg=1 data-bg=0> red</x-state>' +
      '<x-state data-fg=2 data-bg=0> green</x-state>' +
      '<x-state data-fg=3 data-bg=0> yellow</x-state>' +
      '<x-state data-fg=4 data-bg=0> blue</x-state>' +
      '<x-state data-fg=5 data-bg=0> magenta</x-state>' +
      '<x-state data-fg=6 data-bg=0> cyan</x-state>',
      text:
      'This is line ' + index + ' red green yellow blue magenta cyan'
    }
  }

  return this.rows_[index];
};

MockRowProvider.prototype.getRowsText = function(start, end) {
  if (start < 0 || end >= this.rows_.length)
    throw 'Index out of bounds.';

  var text = this.rows_.slice(start, end);
  return text.map(function (e) { return e.text }).join('\n');
};

MockRowProvider.prototype.getRowText = function(index) {
  var rec = this.getRowRecord_(index);
  return rec.text;
};

MockRowProvider.prototype.getRowNode = function(index) {
  this.addCallCount('getRowNode');

  if (this.rowNodeCache_ && index in this.rowNodeCache_)
    return this.rowNodeCache_[index];

  var rec = this.getRowRecord_(index);
  var rowNode = this.document_.createElement('x-row');
  rowNode.rowIndex = index;
  rowNode.innerHTML = rec.html;

  if (this.rowNodeCache_)
    this.rowNodeCache_[index] = rowNode;

  return rowNode;
};