def find_sample_with_name( name ):
	samples = config['samples']
	sample = [ sample for sample in samples if sample['name'] == name ]
	if  len( sample ) != 1:
		raise Exception( "Wrong number of samples found with name '%s' (%d, expected 1)." % ( id, len( sample )) )
	return sample[0]

def find_sample_with_ID( ID ):
	samples = config['samples']
	sample = [ sample for sample in samples if sample['ID'] == ID ]
	if  len( sample ) != 1:
		raise Exception( "Wrong number of samples found with ID '%s' (%d, expected 1)." % ( ID, len( sample )) )
	return sample[0]

def get_read_files( ID ):
	template = config['fastq_filename_template']
	return {
		"read1": template.format( ID = ID, read = 1 ),
		"read2": template.format( ID = ID, read = 2 )
	}

def get_read_group_line( ID ):
	sample = find_sample_with_ID( ID )
	return "@RG\\tID:{ID}\\tSM:{sample}\\tPL:ILLUMINA".format(
		ID = sample['ID'],
		sample = sample['name']
	)