export default function (app) {
  var state = {}
  var view = app.view
  var actions = {}
  var events = {}
  var node
  var element

  for (var i = -1, plugins = app.plugins || []; i < plugins.length; i++) {
    var plugin = plugins[i] ? plugins[i](app) : app

    if (plugin.state != null) {
      state = merge(state, plugin.state)
    }

    init(actions, plugin.actions)

    Object.keys(plugin.events || []).map(function (key) {
      events[key] = (events[key] || []).concat(plugin.events[key])
    })
  }

  if (document.readyState[0] !== "l") {
    load()
  } else {
    addEventListener("DOMContentLoaded", load)
  }

  function init(namespace, children, lastName) {
    Object.keys(children || []).map(function (key) {
      var action = children[key]
      var name = lastName ? lastName + "." + key : key

      if (typeof action === "function") {
        namespace[key] = function (data) {
          var result = action(state, emit("action", {
            name: name,
            data: data
          }).data, actions, emit)

          if (result == null || typeof result.then === "function") {
            return result
          }

          render(state = merge(state, emit("update", result)), view)
        }
      } else {
        init(namespace[key] || (namespace[key] = {}), action, name)
      }
    })
  }

  function load() {
    render(state, view)
    emit("loaded", emit)
  }

  function emit(name, data) {
    (events[name] || []).map(function (cb) {
      var result = cb(state, actions, data, emit)
      if (result != null) {
        data = result
      }
    })

    return data
  }

  function render(state, view) {
    element = patch(
      app.root || (app.root = document.body),
      element,
      node,
      node = emit("render", view)(state, actions)
    )
  }

  function merge(a, b) {
    var obj = {}

    if (typeof b !== "object" || Array.isArray(b)) {
      return b
    }

    for (var i in a) {
      obj[i] = a[i]
    }
    for (var i in b) {
      obj[i] = b[i]
    }

    return obj
  }

  function createElementFrom(node, isSVG) {
    if (typeof node === "string") {
      var element = document.createTextNode(node)

    } else {
      var element = (isSVG = isSVG || node.tag === "svg")
        ? document.createElementNS("http://www.w3.org/2000/svg", node.tag)
        : document.createElement(node.tag)

      for (var i = 0; i < node.children.length;) {
        element.appendChild(createElementFrom(node.children[i++], isSVG))
      }

      for (var name in node.data) {
        if (name === "onCreate") {
          node.data[name](element)
        } else {
          setElementData(element, name, node.data[name])
        }
      }
    }

    return element
  }

  function setElementData(element, name, value, oldValue) {
    if (name === "key") {
    } else if ((name = name.toLowerCase()) === "style") {
      for (var i in merge(oldValue, value = value || {})) {
        element.style[i] = value[i] || ""
      }
    } else {
      try {
        element[name] = value
      } catch (_) {
      }

      if (typeof value !== "function") {
        if (value) {
          element.setAttribute(name, value)
        } else {
          element.removeAttribute(name)
        }
      }
    }
  }

  function updateElementData(element, oldData, data) {
    debugger
    for (var name in merge(oldData, data)) {
      var value = data[name]
      var oldValue = oldData[name]

      if (name === "onUpdate") {
        value(element)

      } else if (value !== oldValue || value !== element[name]) {
        setElementData(element, name, value, oldValue)
      }
    }
  }

  function getKeyFrom(node) {
    if (node && (node = node.data)) {
      return node.key
    }
  }

  function removeElement(parent, element, node) {
    if (node.data.onRemove) {
      node.data.onRemove(element)
    }
    parent.removeChild(element)
  }

  function patch(parent, element, oldNode, node) {
    if (oldNode == null) {
      element = parent.insertBefore(createElementFrom(node), element)

    } else if (node.tag && node.tag === oldNode.tag) {
      updateElementData(element, oldNode.data, node.data)

      var len = node.children.length
      var oldLen = oldNode.children.length
      var reusableChildren = {}
      var oldElements = []
      var newKeys = {}

      for (var i = 0; i < oldLen; i++) {
        var oldElement = element.childNodes[i]
        oldElements[i] = oldElement

        var oldChild = oldNode.children[i]
        var oldKey = getKeyFrom(oldChild)

        if (null != oldKey) {
          reusableChildren[oldKey] = [oldElement, oldChild]
        }
      }

      var i = 0
      var j = 0

      while (j < len) {
        var oldElement = oldElements[i]
        var oldChild = oldNode.children[i]
        var newChild = node.children[j]

        var oldKey = getKeyFrom(oldChild)
        if (newKeys[oldKey]) {
          i++
          continue
        }

        var newKey = getKeyFrom(newChild)

        var reusableChild = reusableChildren[newKey]
        var reusableElement = 0
        var reusableNode = 0

        if (reusableChild) {
          reusableElement = reusableChild[0]
          reusableNode = reusableChild[1]
        }

        if (null == oldKey && null == newKey) {
          patch(element, oldElement, oldChild, newChild)
          j++
          i++

        } else if (null == oldKey && null != newKey) {
          if (reusableElement) {
            element.insertBefore(reusableElement, oldElement)
            patch(element, reusableElement, reusableNode, newChild)
          } else {
            patch(element, oldElement, null, newChild)
          }

          j++
          newKeys[newKey] = newChild

        } else if (null != oldKey && null == newKey) {
          i++

        } else {
          if (oldKey === newKey) {
            patch(element, reusableElement, reusableNode, newChild)
            i++

          } else if (reusableElement) {
            element.insertBefore(reusableElement, oldElement)
            patch(element, reusableElement, reusableNode, newChild)

          } else {
            patch(element, oldElement, null, newChild)
          }

          j++
          newKeys[newKey] = newChild
        }
      }

      while (i < oldLen) {
        var oldChild = oldNode.children[i]
        var oldKey = getKeyFrom(oldChild)
        if (null == oldKey) {
          removeElement(element, oldElements[i], oldChild)
        }
        i++
      }

      for (var i in reusableChildren) {
        var reusableChild = reusableChildren[i]
        var reusableNode = reusableChild[1]
        if (!newKeys[reusableNode.data.key]) {
          removeElement(element, reusableChild[0], reusableNode)
        }
      }
    } else if (node !== oldNode) {
      var i = element
      parent.replaceChild(element = createElementFrom(node), i)
    }

    return element
  }
}


@@ -3307,21 +3307,8 @@
 ) %7B%0A
-    debugger%0A
     

Remove extraneous debugger.