#!/bin/env ruby
############################################################################
#Word sorter for Pat's dissertation                                        #
#More documentation TBD                                                    #
#Current Usage:                                                            #
# Scans a file for groups of words and counts the totals                   #
# Input file:       ./tester.txt                                           #
# Wroud group file: ./bins.json                                            #
# Output file:      ./output.json                                          #
#                                                                          #
# The input file is human readable, easy to edit.                          #
# The output file is single-line JSON, use jq to format for reading.       #
#                                                                          #
#To Do:                                                                    #
# * use STDIN to accept file to scan                                       #
# * Support scaning multiple files                                         #
# * Output to csv                                                          #
# * Strip out header and footer text                                       #
############################################################################
require 'json'
require 'pp'
require 'csv'

#json = File.read('./bins.json')
csv = CSV.read('./bins.csv')
text = File.read('tester.txt')
#bins = JSON.parse(json) #Turn bins.json into a hash
output = Hash.new #Creating the output storage object

bins = Hash.new
csv.each { |bin| bins[bin[0].to_sym] = bin[1..].compact }

#bin_counter expects:
# bin - a hash with strings to search for
# test - the document text to search through
#This method returns a hash containg the strings and their frequency
def bin_counter (bin, text)
  ret = Hash.new
  bin.each do |word|
    ret[word.to_sym] = text.scan(word).count.to_s
  end
  return ret
end

#count_total expects:
# bin - a hash created by bin_counter
#This method returns a hash with the total count of all words in a bin
def count_total (bin)
  count = 0
  bin[:words].each_key do |word|
    count += bin[:words][word].to_i
  end
  return count
end

#write_output expects:
# output - a hash containing all of our output
#This method converts the output hash to JSON and writes it to output.json
def write_output (output)
  outfile = File.open('./output.json','w')
  outfile.write(output.to_json)
  outfile.close
end

bins.each_key do |bin_number|
  key = bin_number.to_sym
  output[key] = Hash.new
  output[key][:words] = bin_counter(bins[bin_number], text)
  output[key][:total] = count_total(output[key])
end
write_output(output)