(function (global, factory) {
  typeof exports === "object" && typeof module !== "undefined"
    ? factory(exports)
    : typeof define === "function" && define.amd
    ? define(["exports"], factory)
    : factory((globalThis.pell = {}));
})(this, function (exports) {
  "use strict";

  var _extends =
    Object.assign ||
    function (target) {
      for (var i = 1; i < arguments.length; i++) {
        var source = arguments[i];
        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key];
          }
        }
      }
      return target;
    };

  var defaultParagraphSeparatorString = "defaultParagraphSeparator";
  var formatBlock = "formatBlock";
  var addEventListener = function addEventListener(parent, type, listener) {
    return parent.addEventListener(type, listener);
  };
  var appendChild = function appendChild(parent, child) {
    return parent.appendChild(child);
  };
  var createElement = function createElement(tag) {
    return document.createElement(tag);
  };
  var queryCommandState = function queryCommandState(command) {
    return document.queryCommandState(command);
  };
  var queryCommandValue = function queryCommandValue(command) {
    return document.queryCommandValue(command);
  };


  var exec = function exec(command) {
    var value =
      arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
    return document.execCommand(command, false, value);
  };

  var defaultActions = {
    bold: {
      icon: "<b>B</b>",
      title: "Bold",
      state: function state() {
        return queryCommandState("bold");
      },
      result: function result() {
        return exec("bold");
      },
    },
    italic: {
      icon: "<i>I</i>",
      title: "Italic",
      state: function state() {
        return queryCommandState("italic");
      },
      result: function result() {
        return exec("italic");
      },
    },
    underline: {
      icon: "<u>U</u>",
      title: "Underline",
      state: function state() {
        return queryCommandState("underline");
      },
      result: function result() {
        return exec("underline");
      },
    },
    strikethrough: {
      icon: "<strike>S</strike>",
      title: "Strike-through",
      state: function state() {
        return queryCommandState("strikeThrough");
      },
      result: function result() {
        return exec("strikeThrough");
      },
    },
    heading1: {
      icon: "<b>H<sub>1</sub></b>",
      title: "Heading 1",
      result: function result() {
        return exec(formatBlock, "<h1>");
      },
    },
    heading2: {
      icon: "<b>H<sub>2</sub></b>",
      title: "Heading 2",
      result: function result() {
        return exec(formatBlock, "<h2>");
      },
    },
    paragraph: {
      icon: "&#182;",
      title: "Paragraph",
      result: function result() {
        return exec(formatBlock, "<p>");
      },
    },
    quote: {
      icon: "&#8220; &#8221;",
      title: "Quote",
      result: function result() {
        return exec(formatBlock, "<blockquote>");
      },
    },
    olist: {
      icon: "&#35;",
      title: "Ordered List",
      result: function result() {
        return exec("insertOrderedList");
      },
    },
    ulist: {
      icon: "&#8226;",
      title: "Unordered List",
      result: function result() {
        return exec("insertUnorderedList");
      },
    },
    code: {
      icon: "&lt;/&gt;",
      title: "Code",
      result: function result() {
        return exec(formatBlock, "<pre>");
      },
    },
    line: {
      icon: "&#8213;",
      title: "Horizontal Line",
      result: function result() {
        return exec("insertHorizontalRule");
      },
    },
    link: {
      icon: "&#128279;",
      title: "Link",
      result: function result() {
        var url = window.prompt("Enter the link URL");
        if (url) exec("createLink", url);
      },
    },
    image: {
      icon: "&#128247;",
      title: "Image",
      result: function result() {
        var url = window.prompt("Enter the image URL");
        if (url) exec("insertImage", url);
      },
    },
  };

  var defaultClasses = {
    actionbar: "pell-actionbar",
    button: "pell-button",
    content: "pell-content",
    selected: "pell-button-selected",
  };

  var init = function init(settings) {
    var actions = settings.actions
      ? settings.actions.map(function (action) {
          if (typeof action === "string") return defaultActions[action];
          else if (defaultActions[action.name])
            return _extends({}, defaultActions[action.name], action);
          return action;
        })
      : Object.keys(defaultActions).map(function (action) {
          return defaultActions[action];
        });

    var classes = _extends({}, defaultClasses, settings.classes);

    var defaultParagraphSeparator =
      settings[defaultParagraphSeparatorString] || "div";

    var actionbar = createElement("div");
    actionbar.className = classes.actionbar;
    appendChild(settings.element, actionbar);

    var content = (settings.element.content = createElement("div"));
    content.contentEditable = true;
    content.className = classes.content;
    content.oninput = function (_ref) {
      var firstChild = _ref.target.firstChild;

      if (firstChild && firstChild.nodeType === 3)
        exec(formatBlock, "<" + defaultParagraphSeparator + ">");
      else if (content.innerHTML === "<br>") content.innerHTML = "";
      settings.onChange(content.innerHTML);
    };
    content.onkeydown = function (event) {
      if (
        event.key === "Enter" &&
        queryCommandValue(formatBlock) === "blockquote"
      ) {
        setTimeout(function () {
          return exec(formatBlock, "<" + defaultParagraphSeparator + ">");
        }, 0);
      }
    };
    appendChild(settings.element, content);

    actions.forEach(function (action) {
      var button = createElement("button");
      button.className = classes.button;
      button.innerHTML = action.icon;
      button.title = action.title;
      button.setAttribute("type", "button");
      button.onclick = function () {
        return action.result() && content.focus();
      };

      if (action.state) {
        var handler = function handler() {
          return button.classList[action.state() ? "add" : "remove"](
            classes.selected
          );
        };
        addEventListener(content, "keyup", handler);
        addEventListener(content, "mouseup", handler);
        addEventListener(button, "click", handler);
      }

      appendChild(actionbar, button);
    });

    if (settings.styleWithCSS) exec("styleWithCSS");
    exec(defaultParagraphSeparatorString, defaultParagraphSeparator);

    return settings.element;
  };

  var pell = { exec: exec, init: init };

  exports.exec = exec;
  exports.init = init;
  exports["default"] = pell;

  Object.defineProperty(exports, "__esModule", { value: true });
});

export default pell;