// Copyright (c) 2009 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 $(id) {
  return document.getElementById(id);
}

chrome.extension.onMessage.addListener(function(request, sender, response) {
  if (request.msg == 'page_capturable') {
    $('tip').style.display = 'none';
    $('captureSpecialPageItem').style.display = 'none';
    $('captureWindowItem').style.display = 'block';
    $('captureAreaItem').style.display = 'block';
    $('captureWebpageItem').style.display = 'block';
  } else if (request.msg == 'page_uncapturable') {
    i18nReplace('tip', 'special');
    $('tip').style.display = 'block';
    $('captureSpecialPageItem').style.display = 'none';
    $('captureWindowItem').style.display = 'none';
    $('captureAreaItem').style.display = 'none';
    $('captureWebpageItem').style.display = 'none';
  }
});

function toDo(what) {
  var bg = chrome.extension.getBackgroundPage();
  switch (what) {
    case 'capture_window':
      bg.screenshot.captureWindow();
      window.close();
      break;
    case 'capture_area':
      bg.screenshot.showSelectionArea();
      window.close();
      break;
    case 'capture_webpage':
      bg.screenshot.captureWebpage();
      $('loadDiv').style.display = 'block';
      $('item').style.display = 'none';
      break;
    case 'capture_special_page':
      bg.screenshot.captureSpecialPage();
      window.close();
      break;
  }
}

function i18nReplace(id, name) {
  return $(id).innerHTML = chrome.i18n.getMessage(name);
}

function resizeDivWidth(id, width) {
  $(id).style.width = width + "px";
}

function init() {
  i18nReplace('captureSpecialPageText', 'capture_window');
  i18nReplace('capturing', 'capturing');
  i18nReplace('captureWindowText', 'capture_window');
  i18nReplace('captureAreaText', 'capture_area');
  i18nReplace('captureWebpageText', 'capture_webpage');
  i18nReplace('optionItem', 'option');

  $('option').addEventListener('click', function () {
    chrome.tabs.create({ url: 'options.html'});
  }, false);

  $('captureWindowShortcut').style.display = 'none';
  $('captureAreaShortcut').style.display = 'none';
  $('captureWebpageShortcut').style.display = 'none';
  document.body.style.minWidth = "140px";

  var isScriptLoad = false;
  chrome.tabs.query({
    active: true,
  }, function(tabs) {
    if (tabs.length < 1) {
      console.error('Expected 1 tab');
      return;
    }
    var tab = tabs[0];
    if (tab.url.indexOf('chrome') == 0 || tab.url.indexOf('about') == 0) {
      i18nReplace('tip', 'special');
      return;
    }
    chrome.tabs.executeScript({ file: 'js/page.js' }, _ => {
      chrome.tabs.executeScript(null, {file: 'js/isLoad.js'}, _ => {
        $('tip').style.display = 'none';
        $('captureSpecialPageItem').style.display = 'block';
        showOption();

        chrome.tabs.sendMessage(tab.id, {msg: 'is_page_capturable'},
          response => {
            isScriptLoad = true;
            if (response.msg == 'capturable') {
              $('tip').style.display = 'none';
              $('captureSpecialPageItem').style.display = 'none';
              $('captureWindowItem').style.display = 'block';
              $('captureAreaItem').style.display = 'block';
              $('captureWebpageItem').style.display = 'block';
              var textWidth = $('captureWindowText')['scrollWidth'];
              resizeDivWidth('captureWindowText', textWidth);
              resizeDivWidth('captureAreaText', textWidth);
              resizeDivWidth('captureWebpageText', textWidth);
              var bg = chrome.extension.getBackgroundPage();
              if (bg.screenshot.isThisPlatform('mac')) {
                $('captureAreaShortcut').innerText = '\u2325\u2318R';
                $('captureWindowShortcut').innerText = '\u2325\u2318V';
                $('captureWebpageShortcut').innerText = '\u2325\u2318H';
              }
            } else if (response.msg == 'uncapturable') {
              i18nReplace('tip', 'special');
              $('tip').style.display = 'block';
            } else {
              i18nReplace('tip', 'loading');
            }
          });

          var insertScript = function() {
            if (isScriptLoad == false) {
              chrome.tabs.query({
                active: true,
              }, function(tabs) {
                if (tabs.length < 1) {
                  console.error('Expected 1 tab.');
                  return;
                }
                var tab = tabs[0];
                if (tab.url.indexOf('chrome') == 0 ||
                    tab.url.indexOf('about') == 0) {
                  i18nReplace('tip', 'special');
                } else {
                  $('tip').style.display = 'none';
                  $('captureSpecialPageItem').style.display = 'block';
                  showOption();
                }
              });
            }
            var captureItems = document.querySelectorAll('li.menuI');
            var showSeparator = false;
            for (var i = 0; i < captureItems.length; i++) {
              if (window.getComputedStyle(captureItems[i]).display != 'none') {
                showSeparator = true;
                break;
              }
            }
            $('separatorItem').style.display = showSeparator ? 'block' : 'none';
          }
          setTimeout(insertScript, 500);

          // Update hot key.
          $('captureSpecialPageItem').addEventListener('click', function(e) {
            toDo('capture_special_page');
          });
          $('captureAreaItem').addEventListener('click', function(e) {
            toDo('capture_area');
          });
          $('captureWindowItem').addEventListener('click', function(e) {
            toDo('capture_window');
          });
          $('captureWebpageItem').addEventListener('click', function(e) {
            toDo('capture_webpage');
          });
      });
    });
  });
}

function showOption() {
  $('option').style.display = 'block';
  $('separatorItem').style.display = 'block';
}

document.addEventListener('DOMContentLoaded', init);