#!/usr/bin/env ruby
# Takes a file as first argument, and formats that table which should
# be in tab delimited form with optional comment lines beginning with # 
# into a table for HTML.
# The second argument is a known quantity - because we also need to calculate
# the final fields of each entry.

def kph(time)
  time = time.to_i
  time_h = time / (60.0 * 60.0)
  distance = 0.47
  return distance / time_h
end

def mph(time)
  return kph(time) * 0.6213712
end

if ARGV[0] == nil then 
  puts "<!-- No argument passed! ma-fmt-tbl Exitting early. -->\n"
  exit
end


table=""

# Sort out the header.
table << "<table>\n"
table << "\t<tr class=\"header\">\n"
table << "\t\t<th>Date</th>\n"
table << "\t\t<th>Set</th>\n"
table << "\t\t<th>Time Taken (s)</th>\n"
table << "\t\t<th>Heart Rate (bpm)</th>\n"
table << "\t\t<th>Stops</th>\n"
table << "\t\t<th>Begin Time</th>\n"
table << "\t\t<th>End Time</th>\n"
table << "\t\t<th>Kph</th>\n"
table << "\t\t<th>Mph</th>\n"
table << "\t</tr>\n"


# Now sort out the actual file.

File.foreach(ARGV[0]).with_index do |line, line_num| 
  next if line[0] == '#'
  next if line == "\n" or line == "\t" or line == "" or line == " "
  table << "\t<tr>\n"
  line.split("\t").each do |entry|
    table << ("\t\t<td>" + entry.delete("\n") + "</td>\n")
  end

  splits = line.split("\t")
  splits_len = splits.length
  time = splits[2]
  kph_v = kph(time)
  mph_v = mph(time)
  while splits_len < 7
    # In case any entries are missing, pad to that amount.
    table << "\t\t<td></td>\n"
    splits_len += 1
  end

  table << ("\t\t<td>" + kph_v.round(2).to_s + "</td>\n")
  table << ("\t\t<td>" + mph_v.round(2).to_s + "</td>\n")

  table << "\t</tr>\n"
end

table << "</table>\n"

# Echo the file. 
puts table