/* NProgress, (c) 2013, 2014 Rico Sta. Cruz - http://ricostacruz.com/nprogress
 * @license MIT */

(function (root, factory) {
  if (typeof define === "function" && define.amd) {
    define(factory);
  } else if (typeof exports === "object") {
    module.exports = factory();
  } else {
    root.NProgress = factory();
  }
})(this, function () {
  var NProgress = {};

  NProgress.version = "0.2.0";

  var Settings = (NProgress.settings = {
    minimum: 0.08,
    easing: "linear",
    positionUsing: "",
    speed: 200,
    trickle: true,
    trickleSpeed: 200,
    showSpinner: true,
    barSelector: '[role="bar"]',
    spinnerSelector: '[role="spinner"]',
    parent: "body",
    template:
      '<div class="bar" role="bar"><div class="peg"></div></div><div class="spinner" role="spinner"><div class="spinner-icon"></div></div>',
  });

  /**
   * Updates configuration.
   *
   *     NProgress.configure({
   *       minimum: 0.1
   *     });
   */
  NProgress.configure = function (options) {
    var key, value;
    for (key in options) {
      value = options[key];
      if (value !== undefined && options.hasOwnProperty(key))
        Settings[key] = value;
    }

    return this;
  };

  /**
   * Last number.
   */

  NProgress.status = null;

  /**
   * Sets the progress bar status, where `n` is a number from `0.0` to `1.0`.
   *
   *     NProgress.set(0.4);
   *     NProgress.set(1.0);
   */

  NProgress.set = function (n) {
    var started = NProgress.isStarted();

    n = clamp(n, Settings.minimum, 1);
    NProgress.status = n === 1 ? null : n;

    var progress = NProgress.render(!started),
      bar = progress.querySelector(Settings.barSelector),
      speed = Settings.speed,
      ease = Settings.easing;

    progress.offsetWidth; /* Repaint */

    queue(function (next) {
      // Set positionUsing if it hasn't already been set
      if (Settings.positionUsing === "")
        Settings.positionUsing = NProgress.getPositioningCSS();

      // Add transition
      css(bar, barPositionCSS(n, speed, ease));

      if (n === 1) {
        // Fade out
        css(progress, {
          transition: "none",
          opacity: 1,
        });
        progress.offsetWidth; /* Repaint */

        setTimeout(function () {
          css(progress, {
            transition: "all " + speed + "ms linear",
            opacity: 0,
          });
          setTimeout(function () {
            NProgress.remove();
            next();
          }, speed);
        }, speed);
      } else {
        setTimeout(next, speed);
      }
    });

    return this;
  };

  NProgress.isStarted = function () {
    return typeof NProgress.status === "number";
  };

  /**
   * Shows the progress bar.
   * This is the same as setting the status to 0%, except that it doesn't go backwards.
   *
   *     NProgress.start();
   *
   */
  NProgress.start = function () {
    if (!NProgress.status) NProgress.set(0);

    var work = function () {
      setTimeout(function () {
        if (!NProgress.status) return;
        NProgress.trickle();
        work();
      }, Settings.trickleSpeed);
    };

    if (Settings.trickle) work();

    return this;
  };

  /**
   * Hides the progress bar.
   * This is the *sort of* the same as setting the status to 100%, with the
   * difference being `done()` makes some placebo effect of some realistic motion.
   *
   *     NProgress.done();
   *
   * If `true` is passed, it will show the progress bar even if its hidden.
   *
   *     NProgress.done(true);
   */

  NProgress.done = function (force) {
    if (!force && !NProgress.status) return this;

    return NProgress.inc(0.3 + 0.5 * Math.random()).set(1);
  };

  /**
   * Increments by a random amount.
   */

  NProgress.inc = function (amount) {
    var n = NProgress.status;

    if (!n) {
      return NProgress.start();
    } else if (n > 1) {
      return;
    } else {
      if (typeof amount !== "number") {
        if (n >= 0 && n < 0.2) {
          amount = 0.1;
        } else if (n >= 0.2 && n < 0.5) {
          amount = 0.04;
        } else if (n >= 0.5 && n < 0.8) {
          amount = 0.02;
        } else if (n >= 0.8 && n < 0.99) {
          amount = 0.005;
        } else {
          amount = 0;
        }
      }

      n = clamp(n + amount, 0, 0.994);
      return NProgress.set(n);
    }
  };

  NProgress.trickle = function () {
    return NProgress.inc();
  };

  /**
   * Waits for all supplied jQuery promises and
   * increases the progress as the promises resolve.
   *
   * @param $promise jQUery Promise
   */
  (function () {
    var initial = 0,
      current = 0;

    NProgress.promise = function ($promise) {
      if (!$promise || $promise.state() === "resolved") {
        return this;
      }

      if (current === 0) {
        NProgress.start();
      }

      initial++;
      current++;

      $promise.always(function () {
        current--;
        if (current === 0) {
          initial = 0;
          NProgress.done();
        } else {
          NProgress.set((initial - current) / initial);
        }
      });

      return this;
    };
  })();

  /**
   * (Internal) renders the progress bar markup based on the `template`
   * setting.
   */

  NProgress.render = function (fromStart) {
    if (NProgress.isRendered()) return document.getElementById("nprogress");

    addClass(document.documentElement, "nprogress-busy");

    var progress = document.createElement("div");
    progress.id = "nprogress";
    progress.innerHTML = Settings.template;

    var bar = progress.querySelector(Settings.barSelector),
      perc = fromStart ? "-100" : toBarPerc(NProgress.status || 0),
      parent = isDOM(Settings.parent)
        ? Settings.parent
        : document.querySelector(Settings.parent),
      spinner;

    css(bar, {
      transition: "all 0 linear",
      transform: "translate3d(" + perc + "%,0,0)",
    });

    if (!Settings.showSpinner) {
      spinner = progress.querySelector(Settings.spinnerSelector);
      spinner && removeElement(spinner);
    }

    if (parent != document.body) {
      addClass(parent, "nprogress-custom-parent");
    }

    parent.appendChild(progress);
    return progress;
  };

  /**
   * Removes the element. Opposite of render().
   */

  NProgress.remove = function () {
    removeClass(document.documentElement, "nprogress-busy");
    var parent = isDOM(Settings.parent)
      ? Settings.parent
      : document.querySelector(Settings.parent);
    removeClass(parent, "nprogress-custom-parent");
    var progress = document.getElementById("nprogress");
    progress && removeElement(progress);
  };

  /**
   * Checks if the progress bar is rendered.
   */

  NProgress.isRendered = function () {
    return !!document.getElementById("nprogress");
  };

  /**
   * Determine which positioning CSS rule to use.
   */

  NProgress.getPositioningCSS = function () {
    // Sniff on document.body.style
    var bodyStyle = document.body.style;

    // Sniff prefixes
    var vendorPrefix =
      "WebkitTransform" in bodyStyle
        ? "Webkit"
        : "MozTransform" in bodyStyle
        ? "Moz"
        : "msTransform" in bodyStyle
        ? "ms"
        : "OTransform" in bodyStyle
        ? "O"
        : "";

    if (vendorPrefix + "Perspective" in bodyStyle) {
      // Modern browsers with 3D support, e.g. Webkit, IE10
      return "translate3d";
    } else if (vendorPrefix + "Transform" in bodyStyle) {
      // Browsers without 3D support, e.g. IE9
      return "translate";
    } else {
      // Browsers without translate() support, e.g. IE7-8
      return "margin";
    }
  };

  /**
   * Helpers
   */

  function isDOM(obj) {
    if (typeof HTMLElement === "object") {
      return obj instanceof HTMLElement;
    }
    return (
      obj &&
      typeof obj === "object" &&
      obj.nodeType === 1 &&
      typeof obj.nodeName === "string"
    );
  }

  function clamp(n, min, max) {
    if (n < min) return min;
    if (n > max) return max;
    return n;
  }

  /**
   * (Internal) converts a percentage (`0..1`) to a bar translateX
   * percentage (`-100%..0%`).
   */

  function toBarPerc(n) {
    return (-1 + n) * 100;
  }

  /**
   * (Internal) returns the correct CSS for changing the bar's
   * position given an n percentage, and speed and ease from Settings
   */

  function barPositionCSS(n, speed, ease) {
    var barCSS;

    if (Settings.positionUsing === "translate3d") {
      barCSS = { transform: "translate3d(" + toBarPerc(n) + "%,0,0)" };
    } else if (Settings.positionUsing === "translate") {
      barCSS = { transform: "translate(" + toBarPerc(n) + "%,0)" };
    } else {
      barCSS = { "margin-left": toBarPerc(n) + "%" };
    }

    barCSS.transition = "all " + speed + "ms " + ease;

    return barCSS;
  }

  /**
   * (Internal) Queues a function to be executed.
   */

  var queue = (function () {
    var pending = [];

    function next() {
      var fn = pending.shift();
      if (fn) {
        fn(next);
      }
    }

    return function (fn) {
      pending.push(fn);
      if (pending.length == 1) next();
    };
  })();

  /**
   * (Internal) Applies css properties to an element, similar to the jQuery
   * css method.
   *
   * While this helper does assist with vendor prefixed property names, it
   * does not perform any manipulation of values prior to setting styles.
   */

  var css = (function () {
    var cssPrefixes = ["Webkit", "O", "Moz", "ms"],
      cssProps = {};

    function camelCase(string) {
      return string
        .replace(/^-ms-/, "ms-")
        .replace(/-([\da-z])/gi, function (match, letter) {
          return letter.toUpperCase();
        });
    }

    function getVendorProp(name) {
      var style = document.body.style;
      if (name in style) return name;

      var i = cssPrefixes.length,
        capName = name.charAt(0).toUpperCase() + name.slice(1),
        vendorName;
      while (i--) {
        vendorName = cssPrefixes[i] + capName;
        if (vendorName in style) return vendorName;
      }

      return name;
    }

    function getStyleProp(name) {
      name = camelCase(name);
      return cssProps[name] || (cssProps[name] = getVendorProp(name));
    }

    function applyCss(element, prop, value) {
      prop = getStyleProp(prop);
      element.style[prop] = value;
    }

    return function (element, properties) {
      var args = arguments,
        prop,
        value;

      if (args.length == 2) {
        for (prop in properties) {
          value = properties[prop];
          if (value !== undefined && properties.hasOwnProperty(prop))
            applyCss(element, prop, value);
        }
      } else {
        applyCss(element, args[1], args[2]);
      }
    };
  })();

  /**
   * (Internal) Determines if an element or space separated list of class names contains a class name.
   */

  function hasClass(element, name) {
    var list = typeof element == "string" ? element : classList(element);
    return list.indexOf(" " + name + " ") >= 0;
  }

  /**
   * (Internal) Adds a class to an element.
   */

  function addClass(element, name) {
    var oldList = classList(element),
      newList = oldList + name;

    if (hasClass(oldList, name)) return;

    // Trim the opening space.
    element.className = newList.substring(1);
  }

  /**
   * (Internal) Removes a class from an element.
   */

  function removeClass(element, name) {
    var oldList = classList(element),
      newList;

    if (!hasClass(element, name)) return;

    // Replace the class name.
    newList = oldList.replace(" " + name + " ", " ");

    // Trim the opening and closing spaces.
    element.className = newList.substring(1, newList.length - 1);
  }

  /**
   * (Internal) Gets a space separated list of the class names on the element.
   * The list is wrapped with a single space on each end to facilitate finding
   * matches within the list.
   */

  function classList(element) {
    return (" " + ((element && element.className) || "") + " ").replace(
      /\s+/gi,
      " ",
    );
  }

  /**
   * (Internal) Removes an element from the DOM.
   */

  function removeElement(element) {
    element && element.parentNode && element.parentNode.removeChild(element);
  }

  return NProgress;
});

layui.define([], function (exports) {
  exports("nprogress", NProgress);
});