// Copyright 2014 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.

// This is the shared code for the new (Chrome 37) security interstitials. It is
// used for both SSL interstitials and Safe Browsing interstitials.

var expandedDetails = false;
var keyPressState = 0;

/**
 * A convenience method for sending commands to the parent page.
 * @param {string} cmd  The command to send.
 */
function sendCommand(cmd) {
  window.domAutomationController.setAutomationId(1);
  window.domAutomationController.send(cmd);
}

/**
 * This allows errors to be skippped by typing "danger" into the page.
 * @param {string} e The key that was just pressed.
 */
function handleKeypress(e) {
  var BYPASS_SEQUENCE = 'danger';
  if (BYPASS_SEQUENCE.charCodeAt(keyPressState) == e.keyCode) {
    keyPressState++;
    if (keyPressState == BYPASS_SEQUENCE.length) {
      sendCommand(CMD_PROCEED);
      keyPressState = 0;
    }
  } else {
    keyPressState = 0;
  }
}

/**
 * This appends a piece of debugging information to the end of the warning.
 * When complete, the caller must also make the debugging div
 * (error-debugging-info) visible.
 * @param {string} title  The name of this debugging field.
 * @param {string} value  The value of the debugging field.
 */
function appendDebuggingField(title, value) {
  // The values input here are not trusted. Never use innerHTML on these
  // values!
  var spanTitle = document.createElement('span');
  spanTitle.classList.add('debugging-title');
  spanTitle.innerText = title + ': ';

  var spanValue = document.createElement('span');
  spanValue.classList.add('debugging-value');
  spanValue.innerText = value;

  var pElem = document.createElement('p');
  pElem.classList.add('debugging-content');
  pElem.appendChild(spanTitle);
  pElem.appendChild(spanValue);
  $('error-debugging-info').appendChild(pElem);
}

function toggleDebuggingInfo() {
  $('error-debugging-info').classList.toggle('hidden');
}

function setupEvents() {
  var overridable = loadTimeData.getBoolean('overridable');
  var ssl = loadTimeData.getBoolean('ssl');

  if (ssl) {
    $('body').classList.add('ssl');
    $('error-code').textContent = loadTimeData.getString('errorCode');
    $('error-code').classList.remove('hidden');
  } else {
    $('body').classList.add('safe-browsing');
  }

  $('primary-button').addEventListener('click', function() {
    if (!ssl)
      sendCommand(SB_CMD_TAKE_ME_BACK);
    else if (overridable)
      sendCommand(CMD_DONT_PROCEED);
    else
      sendCommand(CMD_RELOAD);
  });

  if (overridable) {
    $('proceed-link').addEventListener('click', function(event) {
      sendCommand(ssl ? CMD_PROCEED : SB_CMD_PROCEED);
    });
  } else if (!ssl) {
    $('final-paragraph').classList.add('hidden');
  }

  if (ssl && overridable) {
    $('proceed-link').classList.add('small-link');
  } else if ($('help-link')) {
    // Overridable SSL page doesn't have this link.
    $('help-link').addEventListener('click', function(event) {
      if (ssl)
        sendCommand(CMD_HELP);
      else if (loadTimeData.getBoolean('phishing'))
        sendCommand(SB_CMD_LEARN_MORE_2);
      else
        sendCommand(SB_CMD_SHOW_DIAGNOSTIC);
    });
  }

  if (ssl && $('clock-link')) {
    $('clock-link').addEventListener('click', function(event) {
      sendCommand(CMD_CLOCK);
    });
  }

  $('details-button').addEventListener('click', function(event) {
    var hiddenDetails = $('details').classList.toggle('hidden');
    $('details-button').innerText = hiddenDetails ?
        loadTimeData.getString('openDetails') :
        loadTimeData.getString('closeDetails');
    if (!expandedDetails) {
      // Record a histogram entry only the first time that details is opened.
      sendCommand(ssl ? CMD_MORE : SB_CMD_EXPANDED_SEE_MORE);
      expandedDetails = true;
    }
  });

  preventDefaultOnPoundLinkClicks();
  setupCheckbox();
  setupSSLDebuggingInfo();
  document.addEventListener('keypress', handleKeypress);
}

document.addEventListener('DOMContentLoaded', setupEvents);