class Invoice

# File lib/invoice.rb, line 6
def initialize(invoice_number)
    super()
    @name = nil
    @language = :es
    @address = nil
    @dni = nil
    @phone = nil
    @activity = nil
    @vat = 0
    @detail_page_items = nil
    @items = []
    @currency = "$"
    @invoice_number = invoice_number
    @company_name = nil
    @company_address = nil
    @company_phone = nil
    @companany_dni = nil
end

# File lib/invoice.rb, line 155
def add_company_info(name, address, phone, dni = nil)
    @company_name = name
    @company_address = address
    @company_phone = phone
    @company_dni = dni
end

# File lib/invoice.rb, line 245
def add_delimiter(number)
    number.reverse.gsub(/(\d{3})(?=\d)/, '\\1,').reverse
end

# File lib/invoice.rb, line 204
def add_details(items)
    @detail_page_items = items
end

# File lib/invoice.rb, line 229
def add_item(description, quantity, price)
    @items << {
        :description => description[0..84],
        :quantity => quantity,
        :price => price.round(3)
    }
end

# File lib/invoice.rb, line 91
def add_items_to_table
    if @items.count <= 10 && @items.count > 0
        i = 0
        spacing = 40
        @items.each do |item|
            text_box (i + 1).to_s, :at => [0, 480 - i*spacing], :width => 50, :align => :center
            text_box item[:description], :at => [50, 480 - i*spacing], :width => 250, :align => :center
            text_box add_delimiter(item[:quantity].to_s), :at => [300, 480 - i*spacing], :width => 70, :align => :center
            text_box @currency, :at => [370, 480 - i*spacing], :width => 20, :align => :center
            text_box add_delimiter(item[:price].to_s), :at => [390, 480 - i*spacing], :width => 60, :align => :center
            text_box @currency, :at => [450, 480 - i*spacing], :width => 20, :align => :center
            text_box add_delimiter((item[:price]*item[:quantity]).round(2).to_s), :at => [470, 480 - i*spacing], :width => 80, :align => :center
            i+=1
        end
        values = @items.map {|x| x[:price]*x[:quantity]}
        calculate_total_values values
    else
        p "Max. 10 items, Min. 0 items"
    end
end

# File lib/invoice.rb, line 82
def calculate_total_values(values)
    text_box @currency, :at => [450, 50], :width => 20, :align => :center
    text_box add_delimiter(values.inject(:+).round(2).to_s), :at => [470, 50], :width => 80, :align => :center
    text_box @currency, :at => [450, 32], :width => 20, :align => :center
    text_box add_delimiter((values.inject(:+)*@vat/100).round(2).to_s), :at => [470, 32], :width => 80, :align => :center
    text_box @currency, :at => [450, 14], :width => 20, :align => :center
    text_box add_delimiter((values.inject(:+)*(100 + @vat)/100).round(2).to_s), :at => [470, 14], :width => 80, :align => :center
end

# File lib/invoice.rb, line 135
def draw_proforma_box
    title_font
    stroke_rectangle [360, 730], 190, 90
    text_box languages(:title), :width => 190, :align => :center, :at => [360, 705]
    text_box languages(:number) + ":  #{@invoice_number.to_s}", :width => 190, :align => :center, :at => [360, 680]
    
end

# File lib/invoice.rb, line 174
def draw_reception_lines
    if @language == :es
        stroke_line [52, 47], [280, 47]
        stroke_line [42, 27], [280, 27]
        stroke_line [41, 7], [280, 7]
    elsif @language == :en
        stroke_line [42, 47], [280, 47]
        stroke_line [35, 27], [280, 27]
        stroke_line [61, 7], [280, 7] 
    end
end

# File lib/invoice.rb, line 25
def generate
    
    draw_proforma_box # Invoice box in the upper right corner
    insert_logo
    render_company_info # Company information Right to the logo
    render_reception_box # Reception box in the lower left corner
    render_client_information
    render_items_table
    add_items_to_table

    unless @detail_page_items.nil?
        render_detail_page
    end

    self
    save
end

# File lib/invoice.rb, line 131
def insert_logo
    image "img/logo.png"
end

# File lib/invoice.rb, line 253
def languages(content)
    hash = Hash.new
    hash[:es] = {
        :greet => "Estimados señores #{@name}",
        :title => "Factura Proforma",
        :number => "Número",
        :receptor => "SEÑOR(ES): #{@name}",
        :table_date => "FECHA: #{Time.now.strftime('%d/%m/%Y')}",
        :table_address => "DIRECCIÓN: #{@address}",
        :table_dni => "R.U.T.: #{@dni}",
        :table_phone => "TELÉFONO: #{@phone}",
        :table_activity => "GIRO: #{@activity}",
        :item_title => "ITEM",
        :description_title => "DESCRIPCIÓN",
        :quantity_title => "CANTIDAD",
        :price_title => "PRECIO",
        :value_title => "VALOR",
        :subtotal_title => "SUBTOTAL",
        :vat_title => "IMPUESTO #{@vat}%",
        :total_title => "TOTAL",
        :detail_page_title => "Detalles",
        :receptor_name => "Nombre:",
        :receptor_date => "Fecha:",
        :receptor_signature => "Firma:"
    }

    hash[:en] = {
        :greet => "Dear Mr. #{@name}",
        :title => "Proforma Invoice",
        :number => "number",
        :receptor => "NAME: #{@name}",
        :table_date => "DATE: #{Time.now.strftime('%d/%m/%Y')}",
        :table_address => "ADDRESS: #{@address}",
        :table_dni => "DNI: #{@dni}",
        :table_phone => "PHONE: #{@phone}",
        :table_activity => "ACTIVITY: #{@activity}",
        :item_title => "ITEM",
        :description_title => "DESCRIPTION",
        :quantity_title => "QUANTITY",
        :price_title => "PRICE",
        :value_title => "VALUE",
        :subtotal_title => "SUBTOTAL",
        :vat_title => "TAX #{@vat}%",
        :total_title => "TOTAL",
        :detail_page_title => "Details",
        :receptor_name => "Name:",
        :receptor_date => "Date:",
        :receptor_signature => "Signature:"
    }


    hash[@language][content]
end

# File lib/invoice.rb, line 316
def mini_font
    font FONT_NAME, style: :bold
    font_size 10
end

# File lib/invoice.rb, line 321
def normal_font
    font FONT_NAME, style: :normal
    font_size 12
end

# File lib/invoice.rb, line 47
def render_client_information
    normal_font
    move_down 40
    text languages(:receptor)
    text_box languages(:table_date), :at => [305, 605]
    move_down 10
    text languages(:table_address)
    move_down 10
    text languages(:table_dni)
    text_box languages(:table_phone), :at => [160, 556]
    text_box languages(:table_activity), :at => [340, 556]
    render_lines
end

# File lib/invoice.rb, line 147
def render_company_info
    mini_font
    text_box @company_name, :at => [140, 706], :width => 200, :align => :left
    text_box @company_address, :at => [140, 693], :width => 200, :align => :left
    text_box @company_phone, :at => [140, 680], :width => 200, :align => :left
    text_box @company_dni, :at => [140, 667], :width => 200, :align => :left
end

# File lib/invoice.rb, line 190
def render_detail_page
    start_new_page
    insert_logo
    title_font
    move_down 30
    text languages(:detail_page_title)
    normal_font
    @detail_page_items.map {|x| text x}
    move_down 10
    text "------------"
    move_down 10
    text "Total: #{@detail_page_items.count.to_s}"
end

# File lib/invoice.rb, line 61
def render_items_table
    text_box languages(:item_title), :at => [0, 510], :width => 50, :align => :center
    text_box languages(:description_title), :at => [50, 510], :width => 250, :align => :center
    text_box languages(:quantity_title), :at => [300, 510], :width => 70, :align => :center
    text_box languages(:price_title), :at => [370, 510], :width => 80, :align => :center
    text_box languages(:value_title), :at => [450, 510], :width => 100, :align => :center
    text_box languages(:subtotal_title), :at => [300, 50], :width => 150, :align => :center
    text_box languages(:vat_title), :at => [300, 32], :width => 150, :align => :center
    text_box languages(:total_title), :at => [300, 14], :width => 150, :align => :center
    stroke_rounded_rectangle [0, 520], 550, 450, 10
    stroke_rounded_rectangle [300, 60], 250, 65, 10
    stroke_line [50, 520], [50, 70]
    stroke_line [300, 520], [300, 70]
    stroke_line [370, 520], [370, 70]
    stroke_line [450, 520], [450, 70]
    stroke_line [0, 495], [550, 495]
    stroke_line [450, 60], [450, -5]
    stroke_line [300, 37], [550, 37]
    stroke_line [300, 18], [550, 18]
end

# File lib/invoice.rb, line 112
def render_lines
    if @language == :es
        line [70, 593], [295, 593]
        line [350, 593], [550, 593]
        line [71, 569], [550, 569]
        line [37, 545], [150, 545]
        line [230, 545], [330, 545]
        line [375, 545], [550, 545]
    elsif @language == :en
        line [40, 593], [295, 593]
        line [338, 593], [550, 593]
        line [62, 569], [550, 569]
        line [25, 545], [150, 545]
        line [208, 545], [330, 545]
        line [398, 545], [550, 545]
    end
    stroke
end

# File lib/invoice.rb, line 166
def render_reception_box
    mini_font
    text_box languages(:receptor_name), :at => [10, 56], :width => 200, :align => :left
    text_box languages(:receptor_date), :at => [10, 36], :width => 200, :align => :left
    text_box languages(:receptor_signature), :at => [10, 16], :width => 200, :align => :left
    draw_reception_lines
end

# File lib/invoice.rb, line 330
def save
    invoices_folder = "invoices/"
    Dir.mkdir(invoices_folder) unless File.directory?(invoices_folder)
    filename = invoices_folder + @name.downcase.gsub(" ", '-') + "-#{@invoice_number}" + ".pdf"
    render_file filename
    return filename
end

# File lib/invoice.rb, line 217
def set_client_info(name = nil, address = nil, dni = nil, phone = nil, activity = nil)
    @name = name
    @address = address
    @dni = dni
    @phone = phone
    @activity = activity
end

# File lib/invoice.rb, line 237
def set_currency(currency)
    @currency = currency
end

# File lib/invoice.rb, line 213
def set_language(language)
    @language = language.to_sym
end

# File lib/invoice.rb, line 225
def set_tax(vat)
    @vat = vat
end

# File lib/invoice.rb, line 311
def title_font
    font FONT_NAME, style: :bold
    font_size 18
end