def sample_group(wildcards):
	group = Samples[wildcards.sample]
	return expand("04_bam_files/{sample}.sorted.dedup.bam", sample = group)

def control_group(wildcards):
	group = Controls[wildcards.control]
	return expand("04_bam_files/{sample}.sorted.dedup.bam", sample = group)

rule call_peaks:
	input:
		s = sample_group,
		c = control_group	
	output: "06_macs3_peaks/{sample}_{control}_peaks.xls"
	log: "00_logs/{sample}_{control}_macs3_peaks.log"
	run:
		sample_list = []
		control_list = []
		for input_file in input.s: sample_list.append(input_file)
		for control_file in input.c: control_list.append(control_file)
		sample_input = ' '.join(sample_list)
		control_input = ' '.join(control_list)

		shell("macs3 callpeak -t {sample_input} -c {control_input} -f MACS3_READ_TYPE "
			  "-n '{wildcards.sample}_{wildcards.control}' --bdg "
			  "--outdir 06_macs3_peaks/ MACS3_PEAK_TYPE 2> '{log}'")
