# Band registration form for Norsk Urskog Metal Sampler
# Copyright (C) 2015-2018  Harald Eilersen <haraldei@anduin.net>
#
# 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/>.

require 'prawn'
require 'prawn/measurement_extensions'

Prawn::Font::AFM.hide_m17n_warning = true

class PDFForm
  def initialize(band)
    @band = band
    @document = Prawn::Document.new(:page_size => "A4")
  end

  def render(filename)
    heading
    intro_text

    @document.pad_bottom(5) do
      subheading("Generell info:")
      field("Band:", @band.name_and_city)
      field("Webside:", @band.website)
      field("Plateselskap:", @band.label)
      field("Kort bio:", @band.short_bio)
      field("Medlemmer:", @band.members)
    end

    @document.pad_bottom(5) do
      field("Kontaktperson:", @band.contact.name)
      field("Postadresse:", @band.contact.addr)
      field("Telefon:", @band.contact.phone)
      field("Epost:", @band.contact.email)
    end

    subheading("Låter:")
    @band.songs.each do |song|
      unless song.title.empty?
        @document.pad_bottom(10) do
          field("Tittel", song.to_s)
          field("ISRC-kode:", song.isrc)
          field("Utøvere:", song.performers)
          field("Komponister:", song.composers)
          field("Merknad:", song.notes)
        end
      end
    end

    if @document.cursor < 120
      @document.start_new_page
    end

    subheading("Fullmakt:")
    end_text

    @document.number_pages "#{@band.name} - Norsk Urskog 2019 - Side <page>", :align => :center, :at => [0, 0]
    @document.render_file filename
  end

  private

  def one_line
    @one_line ||= @document.font_size.inspect.to_f * 1.4
  end

  def label_width
    3.2.cm
  end

  def heading
    @document.pad_bottom(10) do
      @document.text "Påmelding til Norsk Urskog 2019", :size => 20
    end
  end

  def subheading(text)
    @document.pad(5) do
      @document.text text, :size => 16, :style => :bold
    end
  end

  def next_line
    @document.move_down one_line
  end

  def field(title, value)
    @document.pad_bottom(2) do
      @document.text_box(title,
                         :at => [@document.bounds.left, @document.cursor],
                         :width => label_width,
                         :style => :bold)

      @document.span(@document.bounds.right - label_width, :position => label_width) do
        if value.class == String
          value = " " if value.empty?
          @document.text value
        elsif value.class == Array
          first = true
          value.each do |v|
            @document.text v.to_s
          end
        elsif value.class == Float
          @document.stroke { @document.horizontal_line 0, value, :at => @document.cursor - one_line}
        end
      end
    end
  end

  def intro_text
    @document.pad_bottom(10) do
      @document.text((<<-END.gsub(/\s+/, ' ')), :inline_format => true)
        Takk for din påmelding til Norsk Urskog 2019! Nedenfor finner du de opplysningene vi har
        registrert om din påmelding. Vennligst se over at alt er riktig, skriv så ut og send skjemaet
        i underskrevet tilstand tilbake til:<br><br>

        <b>Norsk Urskog</b><br>
        v/Harald Eilertsen<br>
        Grettevegen 9<br>
        3622 Svene
      END
    end
  end

  def end_text
    @document.span(@document.bounds.right) do
      @document.pad(5) do
        @document.text((<<-END.gsub(/\s+/, ' ') + "\n\n"), :inline_format => true)
          Jeg bekrefter herved at informasjonen gitt ovenfor er riktig, og at jeg på vegne av
          #{@band.name} har fullmakt til å melde ovennevnte låter på Norsk Urskog Metal Sampler 2019:
        END
      end
      @document.pad_bottom(32) { field("Dato/Sted:", 10.cm) }
      @document.pad_bottom(32) { field("Sign:", 10.cm) }
      field("Leselig navn:", 10.cm)
    end
  end
end