#!/usr/bin/env ruby

begin
  require 'elegant'
rescue LoadError
  require 'rubygems'
  require 'elegant'
end


#####################

def asset(path)
  File.expand_path "../../tmp/#{path}", __FILE__
end

def ttf(family)
  {normal: asset("#{family}-Regular.ttf"), bold: asset("#{family}-Bold.ttf")}
end

Elegant.configure do |config|
  config.author    = 'Fullscreen'
  config.creator   = 'Channel+'
  config.producer  = 'Channel+ by Fullscreen'
  config.watermark = asset 'images/logo.png'
  config.fonts     = {
    'Helvetica'  => ttf('fonts/HelveticaWorld'),
    'Sans Serif' => ttf('fonts/ProximaNova'),
    'Fallback'   => ttf('fonts/ArialUnicode'),
  }
end

#####################

def icon_for(name)
  asset "images/icons/#{name}.png"
end

class Section
  attr_accessor :title, :page, :alignment
  def initialize(title:, page:, alignment:)
    @title, @page, @alignment = title, page, alignment
  end

  include Prawn::View
  def render_to(pdf)
    @document = pdf
    render
  end

  def render
    header
    body
    footer
  end

private

  def header
    if alignment == :top and page > 1
      start_new_page
    end

    move_down 10
    formatted_text_box [header_text_box], height: 15, at: [0, cursor]
    move_down 30 # 15 of the float box, and 15 real
  end

  def body
    bounding_box [0, cursor], width: bounds.width, height: 170 do
      stroke_bounds
    end
  end

  def footer
    unless alignment == :bottom
      document.move_down 25
      document.stroke_horizontal_rule
    end
  end

  def sans_serif
    'Sans Serif' if document.font_families['Sans Serif']
  end

  def header_text_box
    {
      text: title.upcase,
      font: sans_serif,
      styles: [:bold],
      valign: :center,
      color: '556270',
      size: 14
    }
  end
end

sections = [
  Section.new(title: 'Lifetime Metrics', page: 1, alignment: :top),
  Section.new(title: 'Monetization', page: 1, alignment: :middle),
  Section.new(title: 'Month over month view tracking', page: 1, alignment: :bottom),
  Section.new(title: 'Lifetime Metrics', page: 2, alignment: :top),
  Section.new(title: 'Month over month view tracking', page: 2, alignment: :middle),
]

#####################

header = {text: 'March 2015', logo: {url: asset('images/thumbnail.png')}}
footer = {text: "Report for <link href='https://www.channelpl.us'>Channel+</link> (2015/02/12 – 2015/10/12)"}

filename = 'elegant.pdf'

Elegant::Document.new(header: header, footer: footer) do |pdf|
  sections.each do |section|
    section.render_to pdf
    if pdf.cursor != 15.0 && section.alignment == :bottom
      p "CURSOR #{pdf.cursor}"
    end
  end
end.render_file filename

`open #{filename}`