var forEachEls = require("./foreach-els")

var defaultSwitches = require("./switches")

module.exports = function(switches, switchesOptions, selectors, fromEl, toEl, options) {
  selectors.forEach(function(selector) {
    var newEls = fromEl.querySelectorAll(selector)
    var oldEls = toEl.querySelectorAll(selector)
    if (this.log) {
      this.log("Pjax switch", selector, newEls, oldEls)
    }
    if (newEls.length !== oldEls.length) {
      // forEachEls(newEls, function(el) {
      //   this.log("newEl", el, el.outerHTML)
      // }, this)
      // forEachEls(oldEls, function(el) {
      //   this.log("oldEl", el, el.outerHTML)
      // }, this)
      throw "DOM doesn’t look the same on new loaded page: ’" + selector + "’ - new " + newEls.length + ", old " + oldEls.length
    }

    forEachEls(newEls, function(newEl, i) {
      var oldEl = oldEls[i]
      if (this.log) {
        this.log("newEl", newEl, "oldEl", oldEl)
      }
      if (switches[selector]) {
        switches[selector].bind(this)(oldEl, newEl, options, switchesOptions[selector])
      }
      else {
        defaultSwitches.outerHTML.bind(this)(oldEl, newEl, options)
      }
    }, this)
  }, this)
}