/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* import-globals-from ../editorUtilities.js */
/* import-globals-from EdDialogCommon.js */

// Cancel() is in EdDialogCommon.js
var gBulletStyleType = "";
var gNumberStyleType = "";
var gListElement;
var gOriginalListType = "";
var gListType = "";
var gMixedListSelection = false;
var gStyleType = "";
var gOriginalStyleType = "";
const gOnesArray = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"];
const gTensArray = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"];
const gHundredsArray = [
  "",
  "C",
  "CC",
  "CCC",
  "CD",
  "D",
  "DC",
  "DCC",
  "DCCC",
  "CM",
];
const gThousandsArray = [
  "",
  "M",
  "MM",
  "MMM",
  "MMMM",
  "MMMMM",
  "MMMMMM",
  "MMMMMMM",
  "MMMMMMMM",
  "MMMMMMMMM",
];
const gRomanDigits = { I: 1, V: 5, X: 10, L: 50, C: 100, D: 500, M: 1000 };
const A = "A".charCodeAt(0);
const gArabic = "1";
const gUpperRoman = "I";
const gLowerRoman = "i";
const gUpperLetters = "A";
const gLowerLetters = "a";
const gDecimalCSS = "decimal";
const gUpperRomanCSS = "upper-roman";
const gLowerRomanCSS = "lower-roman";
const gUpperAlphaCSS = "upper-alpha";
const gLowerAlphaCSS = "lower-alpha";

// dialog initialization code

document.addEventListener("dialogaccept", onAccept);
document.addEventListener("dialogcancel", onCancel);

function Startup() {
  var editor = GetCurrentEditor();
  if (!editor) {
    window.close();
    return;
  }
  gDialog.ListTypeList = document.getElementById("ListType");
  gDialog.BulletStyleList = document.getElementById("BulletStyle");
  gDialog.BulletStyleLabel = document.getElementById("BulletStyleLabel");
  gDialog.StartingNumberInput = document.getElementById("StartingNumber");
  gDialog.StartingNumberLabel = document.getElementById("StartingNumberLabel");
  gDialog.AdvancedEditButton = document.getElementById("AdvancedEditButton1");
  gDialog.RadioGroup = document.getElementById("RadioGroup");
  gDialog.ChangeAllRadio = document.getElementById("ChangeAll");
  gDialog.ChangeSelectedRadio = document.getElementById("ChangeSelected");

  // Try to get an existing list(s)
  var mixedObj = { value: null };
  try {
    gListType = editor.getListState(mixedObj, {}, {}, {});

    // We may have mixed list and non-list, or > 1 list type in selection
    gMixedListSelection = mixedObj.value;

    // Get the list element at the anchor node
    gListElement = editor.getElementOrParentByTagName("list", null);
  } catch (e) {}

  // The copy to use in AdvancedEdit
  if (gListElement) {
    globalElement = gListElement.cloneNode(false);
  }

  // Show extra options for changing entire list if we have one already.
  gDialog.RadioGroup.collapsed = !gListElement;
  if (gListElement) {
    // Radio button index is persistent
    if (gDialog.RadioGroup.getAttribute("index") == "1") {
      gDialog.RadioGroup.selectedItem = gDialog.ChangeSelectedRadio;
    } else {
      gDialog.RadioGroup.selectedItem = gDialog.ChangeAllRadio;
    }
  }

  InitDialog();

  gOriginalListType = gListType;

  gDialog.ListTypeList.focus();

  SetWindowLocation();
}

function InitDialog() {
  // Note that if mixed, we we pay attention
  //   only to the anchor node's list type
  // (i.e., don't confuse user with "mixed" designation)
  if (gListElement) {
    gListType = gListElement.nodeName.toLowerCase();
  } else {
    gListType = "";
  }

  gDialog.ListTypeList.value = gListType;
  gDialog.StartingNumberInput.value = "";

  // Last param = true means attribute value is case-sensitive
  var type = globalElement
    ? GetHTMLOrCSSStyleValue(globalElement, "type", "list-style-type")
    : null;

  if (gListType == "ul") {
    if (type) {
      type = type.toLowerCase();
      gBulletStyleType = type;
      gOriginalStyleType = type;
    }
  } else if (gListType == "ol") {
    // Translate CSS property strings
    switch (type.toLowerCase()) {
      case gDecimalCSS:
        type = gArabic;
        break;
      case gUpperRomanCSS:
        type = gUpperRoman;
        break;
      case gLowerRomanCSS:
        type = gLowerRoman;
        break;
      case gUpperAlphaCSS:
        type = gUpperLetters;
        break;
      case gLowerAlphaCSS:
        type = gLowerLetters;
        break;
    }
    if (type) {
      gNumberStyleType = type;
      gOriginalStyleType = type;
    }

    // Convert attribute number to appropriate letter or roman numeral
    gDialog.StartingNumberInput.value = ConvertStartAttrToUserString(
      globalElement.getAttribute("start"),
      type
    );
  }
  BuildBulletStyleList();
}

// Convert attribute number to appropriate letter or roman numeral
function ConvertStartAttrToUserString(startAttr, type) {
  switch (type) {
    case gUpperRoman:
      startAttr = ConvertArabicToRoman(startAttr);
      break;
    case gLowerRoman:
      startAttr = ConvertArabicToRoman(startAttr).toLowerCase();
      break;
    case gUpperLetters:
      startAttr = ConvertArabicToLetters(startAttr);
      break;
    case gLowerLetters:
      startAttr = ConvertArabicToLetters(startAttr).toLowerCase();
      break;
  }
  return startAttr;
}

function BuildBulletStyleList() {
  gDialog.BulletStyleList.removeAllItems();
  var label;

  if (gListType == "ul") {
    gDialog.BulletStyleList.removeAttribute("disabled");
    gDialog.BulletStyleLabel.removeAttribute("disabled");
    gDialog.StartingNumberInput.setAttribute("disabled", "true");
    gDialog.StartingNumberLabel.setAttribute("disabled", "true");

    label = GetString("BulletStyle");

    gDialog.BulletStyleList.appendItem(GetString("Automatic"), "");
    gDialog.BulletStyleList.appendItem(GetString("SolidCircle"), "disc");
    gDialog.BulletStyleList.appendItem(GetString("OpenCircle"), "circle");
    gDialog.BulletStyleList.appendItem(GetString("SolidSquare"), "square");

    gDialog.BulletStyleList.value = gBulletStyleType;
  } else if (gListType == "ol") {
    gDialog.BulletStyleList.removeAttribute("disabled");
    gDialog.BulletStyleLabel.removeAttribute("disabled");
    gDialog.StartingNumberInput.removeAttribute("disabled");
    gDialog.StartingNumberLabel.removeAttribute("disabled");
    label = GetString("NumberStyle");

    gDialog.BulletStyleList.appendItem(GetString("Automatic"), "");
    gDialog.BulletStyleList.appendItem(GetString("Style_1"), gArabic);
    gDialog.BulletStyleList.appendItem(GetString("Style_I"), gUpperRoman);
    gDialog.BulletStyleList.appendItem(GetString("Style_i"), gLowerRoman);
    gDialog.BulletStyleList.appendItem(GetString("Style_A"), gUpperLetters);
    gDialog.BulletStyleList.appendItem(GetString("Style_a"), gLowerLetters);

    gDialog.BulletStyleList.value = gNumberStyleType;
  } else {
    gDialog.BulletStyleList.setAttribute("disabled", "true");
    gDialog.BulletStyleLabel.setAttribute("disabled", "true");
    gDialog.StartingNumberInput.setAttribute("disabled", "true");
    gDialog.StartingNumberLabel.setAttribute("disabled", "true");
  }

  // Disable advanced edit button if changing to "normal"
  if (gListType) {
    gDialog.AdvancedEditButton.removeAttribute("disabled");
  } else {
    gDialog.AdvancedEditButton.setAttribute("disabled", "true");
  }

  if (label) {
    gDialog.BulletStyleLabel.textContent = label;
  }
}

function SelectListType() {
  // Each list type is stored in the "value" of each menuitem
  var NewType = gDialog.ListTypeList.value;

  if (NewType == "ol") {
    SetTextboxFocus(gDialog.StartingNumberInput);
  }

  if (gListType != NewType) {
    gListType = NewType;

    // Create a newlist object for Advanced Editing
    try {
      if (gListType) {
        globalElement = GetCurrentEditor().createElementWithDefaults(gListType);
      }
    } catch (e) {}

    BuildBulletStyleList();
  }
}

function SelectBulletStyle() {
  // Save the selected index so when user changes
  //   list style, restore index to associated list
  // Each bullet or number type is stored in the "value" of each menuitem
  if (gListType == "ul") {
    gBulletStyleType = gDialog.BulletStyleList.value;
  } else if (gListType == "ol") {
    var type = gDialog.BulletStyleList.value;
    if (gNumberStyleType != type) {
      // Convert existing input value to attr number first,
      //   then convert to the appropriate format for the newly-selected
      gDialog.StartingNumberInput.value = ConvertStartAttrToUserString(
        ConvertUserStringToStartAttr(gNumberStyleType),
        type
      );

      gNumberStyleType = type;
      SetTextboxFocus(gDialog.StartingNumberInput);
    }
  }
}

function ValidateData() {
  gBulletStyleType = gDialog.BulletStyleList.value;
  // globalElement should already be of the correct type

  if (globalElement) {
    var editor = GetCurrentEditor();
    if (gListType == "ul") {
      if (gBulletStyleType && gDialog.ChangeAllRadio.selected) {
        globalElement.setAttribute("type", gBulletStyleType);
      } else {
        try {
          editor.removeAttributeOrEquivalent(globalElement, "type", true);
        } catch (e) {}
      }
    } else if (gListType == "ol") {
      if (gBulletStyleType) {
        globalElement.setAttribute("type", gBulletStyleType);
      } else {
        try {
          editor.removeAttributeOrEquivalent(globalElement, "type", true);
        } catch (e) {}
      }

      var startingNumber = ConvertUserStringToStartAttr(gBulletStyleType);
      if (startingNumber) {
        globalElement.setAttribute("start", startingNumber);
      } else {
        globalElement.removeAttribute("start");
      }
    }
  }
  return true;
}

function ConvertUserStringToStartAttr(type) {
  var startingNumber = TrimString(gDialog.StartingNumberInput.value);

  switch (type) {
    case gUpperRoman:
    case gLowerRoman:
      // If the input isn't an integer, assume it's a roman numeral. Convert it.
      if (!Number(startingNumber)) {
        startingNumber = ConvertRomanToArabic(startingNumber);
      }
      break;
    case gUpperLetters:
    case gLowerLetters:
      // Get the number equivalent of the letters
      if (!Number(startingNumber)) {
        startingNumber = ConvertLettersToArabic(startingNumber);
      }
      break;
  }
  return startingNumber;
}

function ConvertRomanToArabic(num) {
  num = num.toUpperCase();
  if (num && !/[^MDCLXVI]/i.test(num)) {
    var Arabic = 0;
    var last_digit = 1000;
    for (var i = 0; i < num.length; i++) {
      var digit = gRomanDigits[num.charAt(i)];
      if (last_digit < digit) {
        Arabic -= 2 * last_digit;
      }

      last_digit = digit;
      Arabic += last_digit;
    }
    return Arabic;
  }

  return "";
}

function ConvertArabicToRoman(num) {
  if (/^\d{1,4}$/.test(num)) {
    var digits = ("000" + num).substr(-4);
    return (
      gThousandsArray[digits.charAt(0)] +
      gHundredsArray[digits.charAt(1)] +
      gTensArray[digits.charAt(2)] +
      gOnesArray[digits.charAt(3)]
    );
  }
  return "";
}

function ConvertLettersToArabic(letters) {
  letters = letters.toUpperCase();
  if (!letters || /[^A-Z]/.test(letters)) {
    return "";
  }

  var num = 0;
  for (var i = 0; i < letters.length; i++) {
    num = num * 26 + letters.charCodeAt(i) - A + 1;
  }
  return num;
}

function ConvertArabicToLetters(num) {
  var letters = "";
  while (num) {
    num--;
    letters = String.fromCharCode(A + (num % 26)) + letters;
    num = Math.floor(num / 26);
  }
  return letters;
}

function onAccept(event) {
  if (ValidateData()) {
    // Coalesce into one undo transaction
    var editor = GetCurrentEditor();

    editor.beginTransaction();

    var changeEntireList =
      gDialog.RadioGroup.selectedItem == gDialog.ChangeAllRadio;

    // Remember which radio button was selected
    if (gListElement) {
      gDialog.RadioGroup.setAttribute("index", changeEntireList ? "0" : "1");
    }

    var changeList;
    if (gListElement && gDialog.ChangeAllRadio.selected) {
      changeList = true;
    } else {
      changeList =
        gMixedListSelection ||
        gListType != gOriginalListType ||
        gBulletStyleType != gOriginalStyleType;
    }
    if (changeList) {
      try {
        if (gListType) {
          editor.makeOrChangeList(
            gListType,
            changeEntireList,
            gBulletStyleType != gOriginalStyleType ? gBulletStyleType : null
          );

          // Get the new list created:
          gListElement = editor.getElementOrParentByTagName(gListType, null);

          editor.cloneAttributes(gListElement, globalElement);
        } else {
          // Remove all existing lists
          if (gListElement && changeEntireList) {
            editor.selectElement(gListElement);
          }

          editor.removeList("ol");
          editor.removeList("ul");
          editor.removeList("dl");
        }
      } catch (e) {}
    }

    editor.endTransaction();

    SaveWindowLocation();

    return;
  }
  event.preventDefault();
}