scoring = require './scoring'
helpers = require './helpers'
_ = require 'underscore'
moment = require 'moment'

module.exports.view = (view) ->
  view.fn 'taskClasses', (type, completed, value, repeat) ->
    #TODO figure out how to just pass in the task model, so i can access all these properties from one object
    classes = type

    # show as completed if completed (naturally) or not required for today
    if completed or (repeat and repeat[helpers.dayMapping[moment().day()]]==false)
      classes += " completed"

    switch
      when value<-8 then classes += ' color-worst'
      when value>=-8 and value<-5 then classes += ' color-worse'
      when value>=-5 and value<-1 then classes += ' color-bad'
      when value>=-1 and value<1 then classes += ' color-neutral'
      when value>=1 and value<5 then classes += ' color-good'
      when value>=5 and value<10 then classes += ' color-better'
      when value>=10 then classes += ' color-best'
    return classes

module.exports.app = (appExports, model) ->
  user = model.at('_user')

  user.on 'set', 'tasks.*.completed', (i, completed, previous, isLocal, passed) ->
    return if passed? && passed.cron # Don't do this stuff on cron
    direction = () ->
      return 'up' if completed==true and previous == false
      return 'down' if completed==false and previous == true
      throw new Error("Direction neither 'up' nor 'down' on checkbox set.")

    # Score the user based on todo task
    task = user.at("tasks.#{i}")
    scoring.score(i, direction())

  appExports.addTask = (e, el, next) ->
    type = $(el).attr('data-task-type')
    list = model.at "_#{type}List"
    newModel = model.at('_new' + type.charAt(0).toUpperCase() + type.slice(1))
    text = newModel.get()
    # Don't add a blank todo
    return if /^(\s)*$/.test(text)

    newModel.set ''
    switch type

      when 'habit'
        list.push {type: type, text: text, notes: '', value: 0, up: true, down: true}

      when 'reward'
        list.push {type: type, text: text, notes: '', value: 20 }

      when 'daily'
        list.push {type: type, text: text, notes: '', value: 0, repeat:{su:true,m:true,t:true,w:true,th:true,f:true,s:true}, completed: false }

      when 'todo'
        list.push {type: type, text: text, notes: '', value: 0, completed: false }

  # list.on 'set', '*.completed', (i, completed, previous, isLocal) ->
  # # Move the item to the bottom if it was checked off
  # list.move i, -1  if completed && isLocal

  appExports.del = (e, el) ->
    # Derby extends model.at to support creation from DOM nodes
    #task = model.at(e.target)
    # FIXME normally that would work, and we'd later simply call `user.del task` (instead of that 4-liner down there)
    # however, see https://github.com/lefnire/habitrpg/pull/226#discussion_r2810391

    id = $(e.target).parents('li.task').attr('data-id')
    return unless id?

    task = user.at "tasks.#{id}"
    type = task.get('type')

    history = task.get('history')
    if history and history.length>2
      # prevent delete-and-recreate hack on red tasks
      if task.get('value') < 0
        result = confirm("Are you sure? Deleting this task will hurt you (to prevent deleting, then re-creating red tasks).")
        if result != true
          return # Cancel. Don't delete, don't hurt user
        else
          task.set('type','habit') # hack to make sure it hits HP, instead of performing "undo checkbox"
          scoring.score(id, direction:'down')

        # prevent accidently deleting long-standing tasks
      else
        result = confirm("Are you sure you want to delete this task?")
        return if result != true

    #TODO bug where I have to delete from _users.tasks AND _{type}List,
    # fix when query subscriptions implemented properly
    $('[rel=tooltip]').tooltip('hide')

    ids = user.get("#{type}Ids")
    ids.splice(ids.indexOf(id),1)
    user.del('tasks.'+id)
    user.set("#{type}Ids", ids)


  appExports.clearCompleted = (e, el) ->
    todoIds = user.get('todoIds')
    removed = false
    _.each model.get('_todoList'), (task) ->
      if task.completed
        removed = true
        user.del('tasks.'+task.id)
        todoIds.splice(todoIds.indexOf(task.id), 1)
    if removed
      user.set('todoIds', todoIds)

  appExports.toggleDay = (e, el) ->
    task = model.at(e.target)
    if /active/.test($(el).attr('class')) # previous state, not current
      task.set('repeat.' + $(el).attr('data-day'), false)
    else
      task.set('repeat.' + $(el).attr('data-day'), true)

  appExports.toggleTaskEdit = (e, el) ->
    hideId = $(el).attr('data-hide-id')
    toggleId = $(el).attr('data-toggle-id')
    $(document.getElementById(hideId)).hide()
    $(document.getElementById(toggleId)).toggle()

  appExports.toggleChart = (e, el) ->
    hideSelector = $(el).attr('data-hide-id')
    chartSelector = $(el).attr('data-toggle-id')
    historyPath = $(el).attr('data-history-path')
    $(document.getElementById(hideSelector)).hide()
    $(document.getElementById(chartSelector)).toggle()

    matrix = [['Date', 'Score']]
    for obj in model.get(historyPath)
      date = +new Date(obj.date)
      readableDate = moment(date).format('MM/DD')
      matrix.push [ readableDate, obj.value ]
    data = google.visualization.arrayToDataTable matrix

    options = {
    title: 'History'
    #TODO use current background color: $(el).css('background-color), but convert to hex (see http://goo.gl/ql5pR)
    backgroundColor: 'whiteSmoke'
    }

    chart = new google.visualization.LineChart(document.getElementById( chartSelector ))
    chart.draw(data, options)

  appExports.score = (e, el, next) ->
    direction = $(el).attr('data-direction')
    direction = 'up' if direction == 'true/'
    direction = 'down' if direction == 'false/'
    task = model.at $(el).parents('li')[0]
    scoring.score(task.get('id'), direction)