#!/usr/bin/env python

# (c) Copyright 2007 The Board of Trustees of the University of Illinois.

import sys
import itertools

import filecompare as fc
import textfilecompare as tfc

def compare_checksums(ref_list, cmp_list):
	# Checksum should have one floating-point number
	if len(ref_list) != 1 or len(cmp_list) != 1: return False

	diff = abs(ref_list[0] - cmp_list[0])
	if diff > 0.005 * abs(ref_list[0]):
		# Checksum does not match
		return False

	# Checksum matches within tolerance
	return True

def compare_floats(ref_list, cmp_list):

	# Lists should be the same length
	if len(ref_list) != len(cmp_list): return False

	# Numbers should be equal with a tolerance of 0.5%
	# or 0.005, whichever is greater.
	for (r, c) in zip(ref_list, cmp_list):
		diff = abs(r - c)
		if not (diff < 0.005 or diff < 0.005 * abs(r)):
			# Floats mismatch
			return False

	# All numbers are within tolerance
	return True

charge_err = "Computed charge distribution does not match the expected values\n"
checksum_err = "Checksums do not match\n"

comparison = fc.Sequence_([
	fc.Compare(tfc.verbatim),
	fc.Compare(tfc.floats, equal=compare_checksums, message=checksum_err),
	fc.Sequence_(itertools.repeat(fc.Compare(tfc.floats, equal=compare_floats, message=charge_err), 17))
	])

fc.default_main(comparison)