PrawnDocument

require 'prawn/fast_png'

class InvoicePdf < Prawn::Document
  def initialize(statement, view)
    super(top_margin: 70)
    @statement = statement
    @line_items = @statement.line_items.order('created_at asc')
    @student = @statement.student
    @view = view
    @width = margin_box.right
    @height = margin_box.top
    header_left
    header_right
    #statement_info
    line_items
    notes
    # total_price
  end

  def header_left
    @cursor = cursor()
    move_up 20
    logo =  "public/images/logo.jpeg"
    image logo, width: 100

    move_cursor_to @cursor
    indent 120 do
      text "Company Pte. Ltd.", size: 15, style: :bold
      text "(201112625E)\n\n", size: 12
      text "Jurong West Street 52,
            #00-000,
            Singapore 640517
            Tel: (65)9999 9999", size: 12
    end
  end

  def header_right
    move_cursor_to @cursor
    indent(@width-200) do
      data = [["Invoice No", "#{@statement.running}"], ["Date Issued", "#{@statement.for_month_of.strftime("%d %B %Y")}"], ["Period", "#{@statement.for_month_of.strftime("%B %Y")}"], ["Account no", "#{@student.client_nric}"]]
      table(data) do |t|
        t.columns(0..2).align = :left
      end
    end
  end

  def line_items
    move_down 50

    text "<u>Cash Invoice<u>", size: 15, style: :bold, align: :center, inline_format: TRUE

    move_down 10

    table line_item_rows do
      row(0).font_style = :bold
      columns(2..4).align = :right
      column(1).width = 150
      self.row_colors = ["DDDDDD", "FFFFFF"]
      self.header = true
    end

    move_down 50
    data = [["Student", "Amount Paid", "Amount Due"], ["#{@student.name}", "#{@statement.total_paid}", "#{price(@statement.total)}"]]
    table(data, position: :center) do |t|
      t.row(0).font_style = :bold
      t.columns(2).align = :right
    end
  end

  def line_item_rows
    [["ITEM", "DESCRIPTION", "QUANTITY", "UNIT PRICE", "AMOUNT(SGD)"]] +
    @line_items.map do |item|
      [item.name, item.description, item.quantity, price(item.amount), price(item.amount * item.quantity)]
    end
  end

  def notes
    move_down 50
    table [["•", "All payments must be made direct to Company Pte. Ltd. Payment made through intermediary will be the customer’s own peril."],
          ["•", "Fees made are not refundable or returnable"],
          ["•", "All cheque should be made crossed and made payable to Company Pte. Ltd."]], cell_style: {border_width: 0}
  end

  def price(num)
    @view.number_to_currency(num)
  end

  def total_price
    move_down 15
    @total_price = 0
    @line_items.map do |item|
      @total_price += item.amount * item.quantity
    end
    text "Total Price: #{price(@total_price)}"
  end

end