# coding: utf-8
require 'CSV'
require 'yaml'

YAML_BASE = {"invoice-nr" => "2017-01-31", "author": "Christoffer Müller Madsen", 'currency': 'DKK', 'commasep': true, 'lang': 'danish', 'seriffont': 'Hoefler Text', 'sansfont': 'Helvetica Neue', 'fontsize': '10pt', 'geometry': 'a4paper, left=43mm, right=43mm, top=51mm, bottom=17mm', 'closingnote': %Q[Please transfer the due amount to the following bank account within the next 14 days:

    Mustermann GmbH
    Kreditinstitut: Deutsche Postbank AG
    IBAN: DE18 3601 0043 9999 9999 99
    BIC: PBNKDEFF

    We really appreciate your business and look forward to future projects together.

    Best regards,
] }

PATH_BASE = "./pdf/"
PRETTY_NAMES = {"papkaffe" => "Papkrus kaffe (0.35 L)", "kage" => "Kage", "spandaur" => "Spandaur"}
PRICES = {'papkaffe' => 7, "kage" => 11}
lines = {}

class LogItem
  def initialize(time,person,product,amount: 1)
    @time = time
    @person = person
    @product = product
    @amount = amount
  end
  attr_accessor :time, :person, :product, :amount
end

class LineItem
  def initialize(type)
    @type = type
  end
  attr_accessor(:type)
end

def read_file(file)
  rows = Array.new
  CSV.foreach(file, col_sep: ';', converters: :float) do |row|
    rows << LogItem.new(row[0],row[1],row[2],amount: row[3])
  end
  rows
end

def partition_rows(rows)
  skyldnere = Hash.new
  rows.each do |row|
    skyldnere[row.person] = Hash.new unless skyldnere[row.person]
    skyldnere[row.person][row.product] = 0 unless skyldnere[row.person][row.product]
    skyldnere[row.person][row.product] += row.amount
  end
  skyldnere
end

def generate_receipt(skyldnere)
  skyldnere.each do |person, products|
    yaml = YAML_BASE.clone
    yaml["to"] = person
    products.each do |product, amount|
      yaml["service"] = Array.new unless yaml["service"]
      hash = {description: PRETTY_NAMES[product], price: PRICES[product]*amount, amount: amount}
      yaml["service"] << Hash[hash.map{ |k, v| [k.to_s, v] }]
    end
    puts Hash[yaml.map{ |k, v| [k.to_s, v] }].to_yaml

  end
#  pdf_path = PATH_BASE + "temp.pdf"
  
#  return pdf_path
end

partition = partition_rows(read_file("./log/matkant.log"))
puts partition.inspect
generate_receipt(partition)