'use strict'

var tempID = '_fm_internal_temporary_id',
  ssl = (window.location.protocol === 'https:'),
  templates = {},
  selectedItems = [],
  overlay,
  clickOverlay

// Removes an element, if exists, from an array
Array.prototype.removeElement = function (element) {
  var i = this.indexOf(element)
  if (i !== -1)
    this.splice(i, 1)
}

// Replaces an element inside an array by another
Array.prototype.replaceElement = function (oldElement, newElement) {
  var i = this.indexOf(oldElement)
  if (i != -1)
    this[i] = newElement
}

// Sends a costum event to itself
Document.prototype.sendCostumEvent = function (text) {
  this.dispatchEvent(new CustomEvent(text))
}

// Gets the content of a cookie
Document.prototype.getCookie = function (name) {
  var re = new RegExp('(?:(?:^|.*;\\s*)' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$')
  return document.cookie.replace(re, '$1')
}

// Remove the last directory of an url
var removeLastDirectoryPartOf = function (url) {
  var arr = url.split('/')
  if (arr.pop() === '') {
    arr.pop()
  }
  return (arr.join('/'))
}

function getCSSRule (rules) {
  for (let i = 0; i < rules.length; i++) {
    rules[i] = rules[i].toLowerCase()
  }

  var result = null,
    find = Array.prototype.find

  find.call(document.styleSheets, styleSheet => {
    result = find.call(styleSheet.cssRules, cssRule => {
      let found = false

      if (cssRule instanceof CSSStyleRule) {
        for (let i = 0; i < rules.length; i++) {
          if (cssRule.selectorText.toLowerCase() == rules[i])
            found = true
        }
      }

      return found
    })

    return result != null
  })

  return result
}

/* * * * * * * * * * * * * * * *
 *                             *
 *            BUTTONS          *
 *                             *
 * * * * * * * * * * * * * * * */
var buttons = {
  previousState: {}
}

buttons.setLoading = function (name) {
  if (typeof this[name] === 'undefined') return
  let i = this[name].querySelector('i')

  this.previousState[name] = i.innerHTML
  i.style.opacity = 0

  setTimeout(function () {
    i.classList.add('spin')
    i.innerHTML = 'autorenew'
    i.style.opacity = 1
  }, 200)
}

// Changes an element to done animation
buttons.setDone = function (name, success = true) {
  let i = this[name].querySelector('i')

  i.style.opacity = 0

  let thirdStep = () => {
    i.innerHTML = this.previousState[name]
    i.style.opacity = null

    if (selectedItems.length == 0 && document.getElementById('listing'))
      document.sendCostumEvent('changed-selected')
  }

  let secondStep = () => {
    i.style.opacity = 0
    setTimeout(thirdStep, 200)
  }

  let firstStep = () => {
    i.classList.remove('spin')
    i.innerHTML = success ?
      'done' :
      'close'
    i.style.opacity = 1
    setTimeout(secondStep, 1000)
  }

  setTimeout(firstStep, 200)
  return false
}

/* * * * * * * * * * * * * * * *
 *                             *
 *            WEBDAV           *
 *                             *
 * * * * * * * * * * * * * * * */
var webdav = {}

webdav.convertURL = function (url) {
  return window.location.origin + url.replace(baseURL + '/', webdavURL + '/')
}

webdav.move = function (oldLink, newLink) {
  return new Promise((resolve, reject) => {
    let request = new XMLHttpRequest(),
      destination = newLink.replace(baseURL + '/', webdavURL + '/')

    destination = window.location.origin + destination.substring(prefixURL.length)

    request.open('MOVE', webdav.convertURL(oldLink), true)
    request.setRequestHeader('Destination', destination)
    request.onload = () => {
      if (request.status == 201 || request.status == 204) {
        resolve()
      } else {
        reject(request.statusText)
      }
    }
    request.onerror = () => reject(request.statusText)
    request.send()
  })
}

webdav.put = function (link, body, headers = {}) {
  return new Promise((resolve, reject) => {
    let request = new XMLHttpRequest()
    request.open('PUT', webdav.convertURL(link), true)

    for (let key in headers) {
      request.setRequestHeader(key, headers[key])
    }

    request.onload = () => {
      if (request.status == 201) {
        resolve()
      } else {
        reject(request.statusText)
      }
    }
    request.onerror = () => reject(request.statusText)
    request.send(body)
  })
}

webdav.delete = function (link) {
  return new Promise((resolve, reject) => {
    let request = new XMLHttpRequest()
    request.open('DELETE', webdav.convertURL(link), true)
    request.onload = () => {
      if (request.status == 204) {
        resolve()
      } else {
        reject(request.statusText)
      }
    }
    request.onerror = () => reject(request.statusText)
    request.send()
  })
}

webdav.new = function (link) {
  return new Promise((resolve, reject) => {
    let request = new XMLHttpRequest()
    request.open((link.endsWith('/') ? 'MKCOL' : 'PUT'), webdav.convertURL(link), true)
    request.onload = () => {
      if (request.status == 201) {
        resolve()
      } else {
        reject(request.statusText)
      }
    }
    request.onerror = () => reject(request.statusText)
    request.send()
  })
}

/* * * * * * * * * * * * * * * *
 *                             *
 *            EVENTS           *
 *                             *
 * * * * * * * * * * * * * * * */
function closePrompt (event) {
  let prompt = document.querySelector('.prompt')

  if (!prompt)
    return

  if (typeof event != 'undefined') {
    event.preventDefault()
  }

  document.querySelector('.overlay').classList.remove('active')
  prompt.classList.remove('active')

  setTimeout(() => {
    prompt.remove()
  }, 100)
}

function notImplemented (event) {
  event.preventDefault()
  clickOverlay.click()

  let clone = document.importNode(templates.info.content, true)
  clone.querySelector('h3').innerHTML = 'Not implemented'
  clone.querySelector('p').innerHTML = "Sorry, but this feature wasn't implemented yet."

  document.querySelector('body').appendChild(clone)
  document.querySelector('.overlay').classList.add('active')
  document.querySelector('.prompt').classList.add('active')
}

// Prevent Default event
var preventDefault = function (event) {
  event.preventDefault()
}

function logoutEvent (event) {
  let request = new XMLHttpRequest()
  request.open('GET', window.location.pathname, true, 'username', 'password')
  request.send()
  request.onreadystatechange = function () {
    if (request.readyState == 4) {
      window.location = '/'
    }
  }
}

function openEvent (event) {
  if (event.currentTarget.classList.contains('disabled'))
    return false

  let link = '?raw=true'

  if (selectedItems.length) {
    link = document.getElementById(selectedItems[0]).dataset.url + link
  } else {
    link = window.location.pathname + link
  }

  window.open(link)
  return false
}

function deleteOnSingleFile () {
  closePrompt()
  buttons.setLoading('delete')

  let promises = []

  webdav.delete(window.location.pathname)
    .then(() => {
      window.location.pathname = removeLastDirectoryPartOf(window.location.pathname)
    })
    .catch(e => {
      buttons.setDone('delete', false)
      console.log(e)
    })
}

function deleteOnListing () {
  closePrompt()
  buttons.setLoading('delete')

  let promises = []

  for (let id of selectedItems) {
    promises.push(webdav.delete(document.getElementById(id).dataset.url))
  }

  Promise.all(promises)
    .then(() => {
      listing.reload()
      buttons.setDone('delete')
    })
    .catch(e => {
      console.log(e)
      buttons.setDone('delete', false)
    })
}

// Handles the delete button event
function deleteEvent (event) {
  let single = false

  if (!selectedItems.length) {
    selectedItems = ['placeholder']
    single = true
  }

  let clone = document.importNode(templates.question.content, true)
  clone.querySelector('h3').innerHTML = 'Delete files'

  if (single) {
    clone.querySelector('form').addEventListener('submit', deleteOnSingleFile)
    clone.querySelector('p').innerHTML = `Are you sure you want to delete this file/folder?`
  } else {
    clone.querySelector('form').addEventListener('submit', deleteOnListing)
    clone.querySelector('p').innerHTML = `Are you sure you want to delete ${selectedItems.length} file(s)?`
  }

  clone.querySelector('input').remove()
  clone.querySelector('.ok').innerHTML = 'Delete'

  document.body.appendChild(clone)
  document.querySelector('.overlay').classList.add('active')
  document.querySelector('.prompt').classList.add('active')

  return false
}

function resetSearchText () {
  let box = document.querySelector('#search > div div')

  if (user.AllowCommands) {
    box.innerHTML = `Search or use one of your supported commands: ${user.Commands.join(", ")}.`
  } else {
    box.innerHTML = 'Type and press enter to search.'
  }
}

function searchEvent (event) {
  if (this.value.length == 0) {
    resetSearchText()
    return
  }

  let value = this.value,
    search = document.getElementById('search'),
    scrollable = document.querySelector('#search > div'),
    box = document.querySelector('#search > div div'),
    pieces = value.split(' '),
    supported = false

  user.Commands.forEach(function (cmd) {
    if (cmd == pieces[0]) {
      supported = true
    }
  })

  if (!supported || !user.AllowCommands) {
    box.innerHTML = 'Press enter to search.'
  } else {
    box.innerHTML = 'Press enter to execute.'
  }

  if (event.keyCode == 13) {
    box.innerHTML = ''
    search.classList.add('ongoing')

    let url = window.location.host + window.location.pathname

    if (document.getElementById('editor')) {
      url = removeLastDirectoryPartOf(url)
    }

    let protocol = ssl ? 'wss:' : 'ws:'

    if (supported && user.AllowCommands) {
      let conn = new WebSocket(`${protocol}//${url}?command=true`)

      conn.onopen = function () {
        conn.send(value)
      }

      conn.onmessage = function (event) {
        box.innerHTML = event.data
        scrollable.scrollTop = scrollable.scrollHeight
      }

      conn.onclose = function (event) {
        search.classList.remove('ongoing')
        listing.reload()
      }

      return
    }

    box.innerHTML = '<ul></ul>'

    let ul = box.querySelector('ul'),
      conn = new WebSocket(`${protocol}//${url}?search=true`)

    conn.onopen = function () {
      conn.send(value)
    }

    conn.onmessage = function (event) {
      ul.innerHTML += '<li><a href="' + event.data + '">' + event.data + '</a></li>'
      scrollable.scrollTop = scrollable.scrollHeight
    }

    conn.onclose = function (event) {
      search.classList.remove('ongoing')
    }
  }
}

function setupSearch () {
  let search = document.getElementById('search'),
    searchInput = search.querySelector('input'),
    searchDiv = search.querySelector('div'),
    hover = false,
    focus = false

  resetSearchText()

  searchInput.addEventListener('focus', event => {
    focus = true
    search.classList.add('active')
  })

  searchDiv.addEventListener('mouseover', event => {
    hover = true
    search.classList.add('active')
  })

  searchInput.addEventListener('blur', event => {
    focus = false
    if (hover)
      return
    search.classList.remove('active')
  })

  search.addEventListener('mouseleave', event => {
    hover = false
    if (focus)
      return
    search.classList.remove('active')
  })

  search.addEventListener('click', event => {
    search.classList.add('active')
    search.querySelector('input').focus()
  })

  searchInput.addEventListener('keyup', searchEvent)
}

function closeHelp (event) {
  event.preventDefault()

  document.querySelector('.help').classList.remove('active')
  document.querySelector('.overlay').classList.remove('active')
}

function openHelp (event) {
  closePrompt(event)

  document.querySelector('.help').classList.add('active')
  document.querySelector('.overlay').classList.add('active')
}

window.addEventListener('keydown', (event) => {
  if (event.keyCode == 27) {
    if (document.querySelector('.help.active')) {
      closeHelp(event)
    }
  }

  if (event.keyCode == 46) {
    deleteEvent(event)
  }

  if (event.keyCode == 112) {
    event.preventDefault()
    openHelp(event)
  }
})

/* * * * * * * * * * * * * * * *
 *                             *
 *           BOOTSTRAP         *
 *                             *
 * * * * * * * * * * * * * * * */

document.addEventListener('DOMContentLoaded', function (event) {
  overlay = document.querySelector('.overlay')
  clickOverlay = document.querySelector('#click-overlay')

  buttons.logout = document.getElementById('logout')
  buttons.open = document.getElementById('open')
  buttons.delete = document.getElementById('delete')
  buttons.previous = document.getElementById('previous')

  // Attach event listeners
  buttons.logout.addEventListener('click', logoutEvent)
  buttons.open.addEventListener('click', openEvent)

  templates.question = document.querySelector('#question-template')
  templates.info = document.querySelector('#info-template')
  templates.move = document.querySelector('#move-template')

  if (user.AllowEdit) {
    buttons.delete.addEventListener('click', deleteEvent)
  }

  let dropdownButtons = document.querySelectorAll('.action[data-dropdown]')
  Array.from(dropdownButtons).forEach(button => {
    button.addEventListener('click', event => {
      button.querySelector('ul').classList.toggle('active')
      clickOverlay.classList.add('active')

      clickOverlay.addEventListener('click', event => {
        button.querySelector('ul').classList.remove('active')
        clickOverlay.classList.remove('active')
      })
    })
  })

  overlay.addEventListener('click', event => {
    if (document.querySelector('.help.active')) {
      closeHelp(event)
      return
    }

    closePrompt(event)
  })

  let mainActions = document.getElementById('main-actions')

  document.getElementById('more').addEventListener('click', event => {
    event.preventDefault()
    event.stopPropagation()

    clickOverlay.classList.add('active')
    mainActions.classList.add('active')

    clickOverlay.addEventListener('click', event => {
      mainActions.classList.remove('active')
      clickOverlay.classList.remove('active')
    })
  })

  setupSearch()
  return false
})