var tape = require("tape")

var on = require("../../../lib/events/on")
var trigger = require("../../../lib/events/trigger")
var attachForm = require("../../../lib/proto/attach-form")

var attr = "data-pjax-state"

tape("test attach form prototype method", function(t) {
  var form = document.createElement("form")
  var loadUrlCalled = false

  attachForm.call({
    options: {
      currentUrlFullReload: true
    },
    loadUrl: function() {
      loadUrlCalled = true
    }
  }, form)

  var internalUri = window.location.protocol + "//" + window.location.host + window.location.pathname + window.location.search

  form.action = "http://external.com/"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "external", "external url stop behavior")

  form.action = internalUri + "#anchor"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "anchor", "internal anchor stop behavior")

  window.location.hash = "#anchor"
  form.action = internalUri + "#another-anchor"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "anchor", "different anchors stop behavior")
  window.location.hash = ""

  form.action = internalUri + "#"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "anchor-empty", "empty anchor stop behavior")

  form.action = window.location.href
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "reload", "submitting when currentUrlFullReload is true will submit normally, without XHR")
  t.equal(loadUrlCalled, false, "loadUrl() not called")

  form.action = window.location.protocol + "//" + window.location.host + "/internal"
  form.method = "POST"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "submit", "triggering a POST request to the next page")
  t.equal(loadUrlCalled, true, "loadUrl() called correctly")

  loadUrlCalled = false
  form.setAttribute(attr, "")
  form.action = window.location.protocol + "//" + window.location.host + "/internal"
  form.method = "GET"
  trigger(form, "submit")
  t.equal(form.getAttribute(attr), "submit", "triggering a GET request to the next page")
  t.equal(loadUrlCalled, true, "loadUrl() called correctly")

  t.end()
})

tape("test attach form preventDefaulted events", function(t) {
  var loadUrlCalled = false
  var form = document.createElement("form")

  // This needs to be before the call to attachForm()
  on(form, "submit", function(event) { event.preventDefault() })

  attachForm.call({
    options: {},
    loadUrl: function() {
      loadUrlCalled = true
    }
  }, form)

  form.action = "#"
  trigger(form, "submit")
  t.equal(loadUrlCalled, false, "events that are preventDefaulted should not fire callback")

  t.end()
})

tape("test options are not modified by attachForm", function(t) {
  var form = document.createElement("form")
  var options = {foo: "bar"}
  var loadUrl = function() {}

  attachForm.call({options: options, loadUrl: loadUrl}, form)

  form.action = window.location.protocol + "//" + window.location.host + window.location.pathname + window.location.search
  form.method = "GET"
  trigger(form, "submit")

  t.equal(1, Object.keys(options).length, "options object that is passed in should not be modified")
  t.equal("bar", options.foo, "options object that is passed in should not be modified")

  t.end()
})

tape("test form elements parsed correctly", function(t) {
  t.plan(1)

  var form = document.createElement("form")
  var input = document.createElement("input")
  input.name = "input"
  input.value = "value"
  form.appendChild(input)

  var params = [{
    name: "input",
    value: "value"
  }]
  var pjax = {
    options: {},
    loadUrl: function(href, options) {
      t.same(options.requestOptions.requestParams, params, "form elements parsed correctly")
    }
  }

  attachForm.call(pjax, form)

  form.action = window.location.protocol + "//" + window.location.host + "/internal"

  trigger(form, "submit")
  // see loadUrl defined above

  t.end()
})

tape("test form.enctype=\"multipart/form-data\"", function(t) {
  t.plan(4)

  var form = document.createElement("form")
  form.enctype = "multipart/form-data"
  var input = document.createElement("input")
  input.name = "input"
  input.value = "value"
  form.appendChild(input)

  var pjax = {
    options: {},
    loadUrl: function(href, options) {
      t.equals(options.requestOptions.requestParams, undefined, "form elements not parsed manually")
      t.true(options.requestOptions.formData instanceof FormData, "requestOptions.formData is a FormData")
      t.equals(Array.from(options.requestOptions.formData.entries()).length, 1, "correct number of FormData elements")
      t.equals(options.requestOptions.formData.get("input"), "value", "FormData element value set correctly")
    }
  }

  attachForm.call(pjax, form)

  form.action = window.location.protocol + "//" + window.location.host + "/internal"

  trigger(form, "submit")
  // see loadUrl defined above

  t.end()
})