cash3.rb

#### CASH 3 ####

require 'csv'
require 'pry'

# Commands

  def sku(array, num)
    array[num-1][0]
  end

  def name(array, num)
    array[num-1][1]
  end

  def wprice(array, num)
    array[num-1][2].to_f
  end

  def rprice(array, num)
    array[num-1][3].to_f
  end

# Import the CSV and convert to an array
def csv_import(array)
  CSV.foreach('products.csv', headers: true) do |row|
    array << row
  end
end

# Export the CSV
def csv_export(data)
  CSV.open("salesreport.csv", "w") do |csv|
    data.each do |k, v|
      csv << [k, v]
    end
  end
end

def greeting
  puts "=================================="
  puts "Welcome to James' Coffee Emporium!"
  puts "=================================="
end

def currency(money)
  sprintf('%.2f', money)
end

def current_time
  Time.now.strftime("%m/%d/%Y %l:%M%p")
end

def show_menu(menu)
  for i in 1..3
    puts "#{i}) Add item - $#{currency(rprice(menu, i))} - #{name(menu, i)}"
  end
  puts "4) Complete Sale"
end

def prompt(output)
  puts "\n#{output}"
  print "> "
  input = gets.chomp
end

def user_selection(m, sales_inv, total)

  light = 0
  medium = 0
  bold = 0

  choice = prompt("Make a selection:").to_i

  while choice < 4

    quantity = prompt("How many?").to_i
    total += rprice(m, choice) * quantity
    puts "\nSubtotal: $#{currency(total)}"

    if choice == 1
      light += quantity
    elsif choice == 2
      medium += quantity
    elsif choice == 3
      bold += quantity
    end

    choice = prompt("Make a selection:").to_i

  end

  puts "\n===== Sale Complete! ====="

  if light > 0
    puts "$#{currency(rprice(m,1)*light)} - #{light} Light"
    sales_inv << [sku(m,1), light]
  end
  if medium > 0
    puts "$#{currency(rprice(m,2)*medium)} - #{medium} Medium"
    sales_inv << [sku(m,2), medium]
  end
  if bold > 0
    puts "$#{currency(rprice(m,3)*bold)} - #{bold} Bold"
    sales_inv << [sku(m,3), bold]
  end
  puts "==========================="

  return total
end

def due(total_due)
  puts "\nThe total amount due is $#{currency(total_due)}"
  puts "\nWhat is the amount tendered?"
  print "$ "
end

def due(total_due)
  puts "\nThe total amount due is $#{currency(total_due)}"
  puts "\nWhat is the amount tendered?"
  print "$ "
end

def user_pays
  pay = gets.to_f
end

def current_time
  Time.now.strftime("%m/%d/%Y %l:%M%p")
end

def tender(tender, final, sales_inv)
  if tender == final
    puts "\n========== Thank You! ============"
    puts current_time
    puts "============ PAID ================"
    csv_export(sales_inv)
  else
    change = tender - final
    result = currency(change.abs)
    if change > 0
      puts "\n========== Thank You! ============"
      puts "The total change due is $#{result}"
      puts current_time
      puts "============= PAID ==============="
      csv_export(sales_inv)
    else
      puts "\n==================================================="
      puts "  WARNING: Customer still owes $#{result}! Exiting..."
      puts "===================================================\n"
    end
  end
end

total = 0
sales_inv = [] # CSV output array
m = [] # Menu Array
inventory = [] # Shopping Cart
csv_import(m)
greeting
show_menu(m)
total_due = user_selection(m, sales_inv, total)
due(total_due)
amt_tnd = user_pays
tender(amt_tnd, total_due, sales_inv)