#!/usr/bin/ruby
#
# This file is part of centurio.work/ing/commands.
#
# centurio.work/ing/commands is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# centurio.work/ing/commands 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 General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# centurio.work/ing/commands (file COPYING in the main directory). If not, see
# <http://www.gnu.org/licenses/>.

require 'rubygems'
require 'json'
require 'xml/smart'
require 'riddl/server'
require 'fileutils'
require 'typhoeus'

# process:
# https://centurio.work/customers/evva/flow/?monitor=https://centurio.work/flow-test/engine/729/

class Get < Riddl::Implementation
  def response
    if @r[0] == 'test'
      Riddl::Parameter::Complex.new('ui','text/html',File.open(File.join(__dir__,'template','test.html')))
    elsif @r[0] == 'menu'
      Riddl::Parameter::Complex.new('ui','text/html',File.open(File.join(__dir__,'template','menu.html')))
    elsif @r[0] == 'framedata'
      Riddl::Parameter::Complex.new('ui','text/html',File.open(File.join(__dir__,'template','framedata.html')))
    else
      Riddl::Parameter::Complex.new('ui','text/html',File.open(File.join(__dir__,'template','template.html')))
    end
  end
end

class InitFrame < Riddl::Implementation
  def response
    Dir.mkdir(File.join('data',@r.last)) rescue nil

    if @p[0].value.to_s.strip.empty?
      File.write(File.join('data',@r.last,'style.url'),@p[0].value)
    end

    File.write(File.join('data',@r.last,'frames.json'),JSON.dump(JSON.parse('{"data":[]}')))

    #for handler
    File.write(File.join('data',@r.last,'dataelements.json'),JSON.dump(JSON.parse('{"data":[]}')))

    File.write(File.join('data',@r.last,'info.json'),JSON.dump(JSON.parse('{"x_amount":' + @p[2].value + ', "y_amount":' + @p[3].value + ', "lang":"' + @p[4].value  + '", "langs":["' + @p[4].value +  '"]}')))

    File.write(File.join('data',@r.last,'callback'),@h['CPEE_CALLBACK'])
    File.write(File.join('data',@r.last,'cpeeinstance.url'),@h['CPEE_INSTANCE_URL'])

    @a[0].send('new')
    nil
  end


  #def headers
  #  Riddl::Header.new('CPEE-CALLBACK', 'true')
  #end
end

#https://coderwall.com/p/atyfyq/ruby-string-to-boolean
#showbutton
class String
  def to_bool
    return true if self == true || self =~ (/(true|t|yes|y|1)$/i)
    return false if self == false || self.empty? || self =~ (/(false|f|no|n|0)$/i)
    raise ArgumentError.new("invalid value for Boolean: \"#{self}\"")
  end
end

class NewFrameSet < Riddl::Implementation
  def response


    path = File.join('data',@r.last,'frames.json')
    file = File.read(path)
    data_hash = JSON::parse(file)

    #check if new frame overlaps others if it does, delete overlapped frames
    data_hash["data"].each do | c |
      if doOverlap(c['lx'], c['ly'], c['rx'], c['ry'], @p[1].value.to_i, @p[2].value.to_i, (@p[1].value.to_i + @p[3].value.to_i - 1), (@p[2].value.to_i + @p[4].value.to_i - 1))
        data_hash["data"].delete(c)
      end
    end

    urls = JSON::parse(@p[7].value);


    if @p[8].value == ""
      hash = {lx: @p[1].value.to_i, ly: @p[2].value.to_i, rx: (@p[1].value.to_i + @p[3].value.to_i - 1), ry: (@p[2].value.to_i + @p[4].value.to_i - 1), url: urls, showbutton: @p[5].value, style: @p[6].value, default: "{}", callback: @h['CPEE_CALLBACK']};
    else
      hash = {lx: @p[1].value.to_i, ly: @p[2].value.to_i, rx: (@p[1].value.to_i + @p[3].value.to_i - 1), ry: (@p[2].value.to_i + @p[4].value.to_i - 1), url: urls, showbutton: @p[5].value,  style: @p[6].value, default: JSON::parse(@p[8].value), callback: @h['CPEE_CALLBACK']};
    end

    data_hash["data"].push(hash)
    File.write(path, JSON.dump(data_hash))

    #only send active url to client
    infofile = File.join('data',@r.last,'info.json')
    infojson = JSON::parse(File.read(infofile))
    hash["url"] = urls.find{ |h| h['lang'] == infojson["lang"]}['url']

    @a[0].send(JSON.dump(hash))
    nil

  end
end

class NewFrameWait < Riddl::Implementation
  def response
    path = File.join('data',@r.last,'frames.json')
    file = File.read(path)
    data_hash = JSON::parse(file)

    #check if new frame overlaps others if it does, delete overlapped frames
    data_hash["data"].each do | c |
      if doOverlap(c['lx'], c['ly'], c['rx'], c['ry'], @p[1].value.to_i, @p[2].value.to_i, (@p[1].value.to_i + @p[3].value.to_i - 1), (@p[2].value.to_i + @p[4].value.to_i - 1))
        data_hash["data"].delete(c)
      end
    end

    urls = JSON::parse(@p[7].value);
    if @p[8].value == ""
      hash = {lx: @p[1].value.to_i, ly: @p[2].value.to_i, rx: (@p[1].value.to_i + @p[3].value.to_i - 1), ry: (@p[2].value.to_i + @p[4].value.to_i - 1), url: urls, showbutton: @p[5].value, style: @p[6].value, default: "{}", callback: @h['CPEE_CALLBACK']};
    else
      hash = {lx: @p[1].value.to_i, ly: @p[2].value.to_i, rx: (@p[1].value.to_i + @p[3].value.to_i - 1), ry: (@p[2].value.to_i + @p[4].value.to_i - 1), url: urls, showbutton: @p[5].value, style: @p[6].value, default: JSON::parse(@p[8].value), callback: @h['CPEE_CALLBACK']};
    end
    data_hash["data"].push(hash)
    File.write(path, JSON.dump(data_hash))

    #only send active url to client
    infofile = File.join('data',@r.last,'info.json')
    infojson = JSON::parse(File.read(infofile))
    hash["url"] = urls.find{ |h| h['lang'] == infojson["lang"]}['url']

    @a[0].send(JSON.dump(hash))
    nil
  end
  def headers
    Riddl::Header.new('CPEE-CALLBACK', 'true')
  end
end

class DeleteFrame < Riddl::Implementation
  def response
    path = File.join('data',@r.last,'frames.json')
    file = File.read(path)
    data_hash = JSON::parse(file)

    data_hash["data"].each do | c |
      if doOverlap(c['lx'], c['ly'], c['rx'], c['ry'], @p[0].value.to_i, @p[1].value.to_i, (@p[0].value.to_i + 1), (@p[1].value.to_i + 1))
        data_hash["data"].delete(c)
      end
    end

    File.write(path, JSON.dump(data_hash))
  end
end

def doOverlap(l1x, l1y, r1x, r1y, l2x, l2y, r2x, r2y)
  if l1x > r2x || l2x > r1x
      return false;
  end
  if l1y > r2y || l2y > r1y
      return false;
  end
  return true;
end

class Delete < Riddl::Implementation
  def response
    if cbu = File.read(File.join('data',@r.last,'callback'))
      send = { 'operation' => @p[0].value }
      case send['operation']
        when 'result'
          send['target'] = JSON::parse(@p[1].value.read)
      end
      cbu += '/' unless cbu[-1] == '/'

      Typhoeus.put(cbu, body: JSON::generate(send), headers: { 'content-type' => 'application/json'})
    end

    File.unlink(File.join('data',@r.last,'callback')) rescue nil
    File.unlink(File.join('data',@r.last,'cpeeinstance.url')) rescue nil
    File.unlink(File.join('data',@r.last,'style.url')) rescue nil
    File.unlink(File.join('data',@r.last,'document.xml')) rescue nil
    File.unlink(File.join('data',@r.last,'info.json')) rescue nil

    @a[0].send('reset')
    nil
  end
end

class GetFrames < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'frames.json')
    if File.exists? fname

      infofile = File.join('data',@r[-2],'info.json')
      infojson = JSON::parse(File.read(infofile))

      #remove not used languages
      file = JSON::parse(File.read(fname))

      file["data"].each do |child|
        child["url"] = child["url"].find{ |h| h['lang'] == infojson["lang"]}['url']
      end

      Riddl::Parameter::Complex.new('value','application/json',JSON.dump(file))
    else
      @status = 404
    end
  end
end #}}}

class SetDataElements < Riddl::Implementation #{{{
  def response
    savejson = @p.map { |o| Hash[o.name, o.value] }.to_json
    path = File.join('data',@r[0],'dataelements.json')
    File.write(path, savejson)

    #puts xyz

    #puts JSON.pretty_generate(@p.to_json)



    #puts @p.length()
    #puts @p[0].name
    #puts @p[0].value

    #fname = File.join('data',@r[-2],'dataelements.json')
    #if File.exists? fname
    #  Riddl::Parameter::Complex.new('value','application/json',File.read(fname))
    #else
    #  @status = 404
    #end
  end
end #}}}

class GetDataElements < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'dataelements.json')
    if File.exists? fname
      Riddl::Parameter::Complex.new('value','application/json',File.read(fname))
    else
      @status = 404
    end
  end
end #}}}

class GetInfo < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'info.json')
    if File.exists? fname
      Riddl::Parameter::Complex.new('value','application/json',File.read(fname))
    else
      @status = 404
    end
  end
end #}}}

class GetLangs < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'info.json')
    if File.exists? fname
      infojson = JSON::parse(File.read(fname))
      Riddl::Parameter::Complex.new('value','application/json',infojson["langs"])
    else
      @status = 404
    end
  end
end #}}}

class SetLang < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'info.json')
    if File.exists? fname
      infojson = JSON::parse(File.read(fname))
      infojson["lang"] = @p[0].value


      #add to langs
      if !infojson["langs"].include?(@p[0].value)
        infojson["langs"].push(@p[0].value)
      end

      File.write(fname, JSON.dump(infojson))



      @a[0].send('reset')
      nil
    else
      @status = 404
    end
  end
end #}}}

class GetStyle < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'style.url')
    if File.exists? fname
      Riddl::Parameter::Complex.new('url','text/plain',File.read(fname).strip)
    else
      @status = 404
    end
  end
end #}}}

class GetCpeeInstance < Riddl::Implementation #{{{
  def response
    fname = File.join('data',@r[-2],'cpeeinstance.url')
    if File.exists? fname
      Riddl::Parameter::Complex.new('url','text/plain',File.read(fname).strip)
    else
      @status = 404
    end
  end
end #}}}

class OutputTest < Riddl::Implementation #{{{
  def response
    puts "Test"
  end
end #}}}

class Handler < Riddl::Implementation
  def response
    puts "handler"

      topic         = @p[1].value
      event_name    = @p[2].value
      notification  = JSON.parse(@p[3].value.read)


      instancenr = notification['instance']
      content = notification['content']
      activity = content['activity']
      parameters = content['parameters']
      receiving = content['received']

      #puts instancenr
      #puts activity
      puts content['values']


      if content['values']&.any?
        #puts alldata['ausfuehrungen']
        puts "writing file"
        path = File.join('data',@r[0],'dataelements.json')
        File.write(path, JSON.dump(content['values']))
      end

      @a[0].send(@r[0])
      nil

    nil
  end
end

class SSE < Riddl::SSEImplementation #{{{
  def onopen
    signals = @a[0]
    signals.add self
    send 'started'
    true
  end

  def onclose
    signals = @a[0]
    signals.remove self
    nil
  end
end #}}}

class SSE2 < Riddl::SSEImplementation #{{{
  def onopen
    signals = @a[0]
    signals.add self
    send 'started'
    true
  end

  def onclose
    signals = @a[0]
    signals.remove self
    nil
  end
end #}}}

class Signaling # {{{
  def initialize
    @binding = []
  end

  def add(binding)
    @binding << binding
  end
  def remove(binding)
    @binding.delete(binding)
  end
  def length
    @binding.length
  end

  def send(value)
    @binding.each do |b|
      b.send(value)
    end
  end
end #}}}

server = Riddl::Server.new(File.join(__dir__,'/frames.xml'), :host => 'localhost') do |opts|
  accessible_description true
  cross_site_xhr true

  opts[:signals] = {}
  opts[:signals2] = {}

  parallel do
    loop do
      opts[:signals].each do |k,v|
        v.send('keepalive')
      end
      opts[:signals2].each do |k,v|
        v.send('keepalive')
      end
      sleep 5
    end
  end


  on resource do
    on resource do |r|
      idx = r[:r][0]
      opts[:signals][idx] ||= Signaling.new
      opts[:signals2]["handler"] ||= Signaling.new

      run Get, "test" if get
      run InitFrame, opts[:signals][idx] if post 'input'

      run NewFrameSet, opts[:signals][idx] if put 'sframe'
      run NewFrameWait, opts[:signals][idx] if put 'wframe'

      run DeleteFrame, opts[:signals][idx] if post 'deleteframe'

      on resource 'handler' do
        run Handler, opts[:signals2]["handler"] if post
        on resource 'sse' do
          run SSE2, opts[:signals2]["handler"] if sse
        end
      end

      run Delete, opts[:signals][idx] if delete 'opa'
      run Delete, opts[:signals][idx] if delete 'opb'
      on resource 'sse' do
        run SSE, opts[:signals][idx] if sse
      end
      on resource 'languages' do
        run GetLangs if get
        run SetLang, opts[:signals][idx] if post 'lang'
      end
      on resource 'style.url' do
        run GetStyle if get
      end
      on resource 'cpeeinstance.url' do
        run GetCpeeInstance if get
      end
      on resource 'info.json' do
        run GetInfo if get
      end
      on resource 'frames.json' do
        run GetFrames if get
      end
      on resource 'test' do
        run OutputTest if put
      end

      on resource 'dataelements.json' do
        run SetDataElements if post
        run GetDataElements if get
      end


    end
  end
end.loop!