###############################################################################

SHELL != which bash
.ONESHELL:

###############################################################################

BUG = cas
CPU != grep -m 1 "cpu cores" /proc/cpuinfo | grep -o '[[:digit:]]*'
SEQ = empty exceptions optional
SUB = $(sort $(filter-out $(BUG),$(shell find * -maxdepth 0 -type d)))
TXT = $(foreach i,$(SUB),$i/stack.txt)

###############################################################################

all:
	@if make -qs $(TXT); then
		make -s sort
	else
		make -s stat
	fi

att:
	-@find $(SUB) -maxdepth 1 -mindepth 1 -name makefile -execdir make -s $@ \;

check:
	-@find $(SUB) -maxdepth 1 -mindepth 1 -name makefile -execdir make -s $@ \; 2> /dev/null

clave:
	@printf '%68s\n' | tr ' ' '-'
	echo 'clave:'
	printf '%68s\n' | tr ' ' '-'
	echo '  programa: símbolo final indica "." = secuencia o ":" = paralelo'
	echo '    median: mediana'
	echo '      mean: media aritmética'
	echo '    stddev: desviación típica'
	echo '       cpu: tiempo de cpu en segundos'
	echo '     ratio: mediana / cpu'

clean:
	-rm -fv core.* *~
	-find -mindepth 2 -maxdepth 2 -iname makefile -execdir make $@ \;

cpu: n$(CPU) 10ms all

default: cpu

min: n1 10ms all

n%:
	@find $(filter-out $(SEQ),$(SUB)) -name stack.cc -execdir sed --follow-symlinks -i 's/const size_t N = .*;/const size_t N = $*;/' {} \;

sort: $(TXT) | clave
	@declare -a F=(program median mean stdev cpu ratio)
	declare -a R=('-b' '-r' '-r' '-s' '-s' '-r')
	for ((i=0; i<$${#F[@]}; ++i)); do
		printf '%68s\n' | tr ' ' '-'
		head -n 1 -q $< | sed "s/  $${F[$$i]}/\[$${F[$$i]}\]/"
		printf '%68s\n' | tr ' ' '-'
		for t in $^; do
			tail -n 1 $$t
		done | sort -k$$((i+1)),$$((i+1)) -k$${#F[@]},$${#F[@]} $${R[$$i]}
	done
	printf '%68s\n' | tr ' ' '-'

stat: $(SUB) | clave
	@for i in $^; do
		make -C $$i -s txt &> /dev/null
		if [ "$$i" == "$<" ]; then
			printf '%68s\n' | tr ' ' '-'
			head -n 1 $$i/stack.txt
			printf '%68s\n' | tr ' ' '-'
		fi
		tail -n 1 $$i/stack.txt
	done
	printf '%68s\n' | tr ' ' '-'

test: $(EXE)
	-@find $(SUB) -maxdepth 1 -mindepth 1 -name test -execdir {} \; 1> /dev/null

%ms:
	@find -name stack.cc -execdir sed --follow-symlinks -i 's/std::this_thread::sleep_for(.*ms);/std::this_thread::sleep_for($*ms);/' {} \;

###############################################################################

%.txt: %.cc
	@make -C $$(dirname $@) -s $$(basename $@) | grep -v stdev

###############################################################################

.PHONY: all att check clave clean cpu default min n% sort stat %ms

###############################################################################