###
# Copyright (C) 2014 Andrey Antukh <niwi@niwi.be>
# Copyright (C) 2014 Jesús Espino Garcia <jespinog@gmail.com>
# Copyright (C) 2014 David Barragán Merino <bameda@dbarragan.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# File: modules/kanban/sortable.coffee
###

taiga = @.taiga

mixOf = @.taiga.mixOf
toggleText = @.taiga.toggleText
scopeDefer = @.taiga.scopeDefer
bindOnce = @.taiga.bindOnce
groupBy = @.taiga.groupBy
timeout = @.taiga.timeout

module = angular.module("taigaKanban")


#############################################################################
## Sortable Directive
#############################################################################

KanbanSortableDirective = ($repo, $rs, $rootscope) ->

    #########################
    ## Drag & Drop Link
    #########################

    link = ($scope, $el, $attrs) ->
        timeout 500, ->
            mainPadding = 32 # px
            elementOffset = $el.parent().parent().offset().top
            windowHeight = angular.element(window).height()
            columnHeight = windowHeight - elementOffset - mainPadding

            console.log elementOffset, windowHeight, columnHeight
            $el.css("height", "#{columnHeight}px")

        oldParentScope = null
        newParentScope = null
        itemEl = null
        tdom = $el

        deleteElement = (itemEl) ->
            # Completelly remove item and its scope from dom
            itemEl.scope().$destroy()
            itemEl.off()
            itemEl.remove()

        tdom.sortable({
            handle: ".icon-drag-h",
            dropOnEmpty: true
            connectWith: ".kanban-uses-box"
            revert: 400
        })

        tdom.on "sortstop", (event, ui) ->
            parentEl = ui.item.parent()
            itemEl = ui.item
            itemUs = itemEl.scope().us
            itemIndex = itemEl.index()
            newParentScope = parentEl.scope()

            newStatusId = newParentScope.status.id
            oldStatusId = oldParentScope.status.id

            if newStatusId != oldStatusId
                deleteElement(itemEl)

            $scope.$apply ->
                $rootscope.$broadcast("kanban:us:move", itemUs, newStatusId, itemIndex)

        tdom.on "sortstart", (event, ui) ->
            oldParentScope = ui.item.parent().scope()

        $scope.$on "$destroy", ->
            $el.off()

    return {link: link}


module.directive("tgKanbanSortable", [
    "$tgRepo",
    "$tgResources",
    "$rootScope",
    KanbanSortableDirective
])