srcdir ?= .
builddir ?= build
CSS ?= /usr/share/javascript/bootstrap4/css/bootstrap.css
HTML_TEMPLATE ?= $(srcdir)/doc/template.html

HTML_FILES = $(patsubst $(srcdir)/doc/%.md,$(builddir)/doc/%.html,$(wildcard $(srcdir)/doc/*.md))
MANUAL_FILES = $(patsubst $(srcdir)/doc/%.md,$(builddir)/doc/%,$(wildcard $(srcdir)/doc/*.[1-9].md))

all: manual

manual: $(MANUAL_FILES)
html: $(HTML_FILES)

# upper case the headers and remove the links
$(MANUAL_FILES): $(builddir)/doc/%: $(srcdir)/doc/%.md
	@mkdir -vp $(dir $@)
	pandoc -f markdown -t json -- "$<" | $(srcdir)/pandoc2man.jq | pandoc -s -f json -t man -o "$@"

test:
	$(srcdir)/tests/certs/generate
	$(srcdir)/tests/run-all

release:
	@if ! git -C $(srcdir) diff --quiet HEAD -- Changelog interimap pullimap lib/Net/IMAP/InterIMAP.pm; then \
		echo "Dirty state, refusing to release!" >&2; \
		exit 1; \
	fi
	VERS=$$(dpkg-parsechangelog -l $(srcdir)/Changelog -SVersion 2>/dev/null) && \
		if git -C $(srcdir) rev-parse -q --verify "refs/tags/v$$VERS" >/dev/null; then echo "tag exists" 2>/dev/null; exit 1; fi && \
		sed -ri "0,/^( -- .*)  .*/ s//\\1  $(shell date -R)/" $(srcdir)/Changelog && \
		sed -ri "0,/^(our\\s+\\\$$VERSION\\s*=\\s*)'[0-9.]+'\\s*;/ s//\\1'$$VERS';/" \
			-- $(srcdir)/interimap $(srcdir)/pullimap && \
		sed -ri "0,/^(package\\s+Net::IMAP::InterIMAP\\s+)v[0-9.]+\\s*;/ s//\\1v$$VERS;/" \
			-- $(srcdir)/lib/Net/IMAP/InterIMAP.pm && \
		sed -ri "0,/^(use\\s+Net::IMAP::InterIMAP\\s+)[0-9.]+(\\s|\\$$)/ s//\\1$$VERS\\2/" \
			-- $(srcdir)/interimap $(srcdir)/pullimap && \
		git -C $(srcdir) commit -m "Prepare new release v$$VERS." \
			-- Changelog interimap pullimap lib/Net/IMAP/InterIMAP.pm && \
		git -C $(srcdir) tag -sm "Release version $$VERS" "v$$VERS"

## `make html CSS="https://guilhem.org/static/css/bootstrap.min.css" builddir="$XDG_RUNTIME_DIR/Downloads/interimap"`
$(HTML_FILES): $(builddir)/doc/%.html: $(srcdir)/doc/%.md $(HTML_TEMPLATE)
	@mkdir -vp $(dir $@)
	mtime="$$(git -C $(srcdir) --no-pager log -1 --pretty="format:%ct" -- "$<" 2>/dev/null)"; \
	[ -n "$$mtime" ] || mtime="$$(date +%s -r "$<")"; \
	[ "$<" = "doc/index.md" ] && parent="" || parent="./index.html"; \
	pandoc -sp -f markdown -t html+smart --css=$(CSS) --template=$(HTML_TEMPLATE) \
		--variable=date:"$$(LC_TIME=C date +"Last modified on %a, %d %b %Y at %T %z" -d @"$$mtime")" \
		--variable=keywords:"interimap" \
		--variable=lang:"en" \
		--variable=parent:"$$parent" \
		--output="$@" -- "$<"

doc: manual html

INSTALL ?= install
INSTALL_PROGRAM ?= $(INSTALL)
INSTALL_DATA ?= $(INSTALL) -m0644

prefix ?= /usr/local
exec_prefix ?= $(prefix)
bindir ?= $(exec_prefix)/bin
libdir ?= $(exec_prefix)/lib
datarootdir ?= $(prefix)/share
mandir ?= $(datarootdir)/man
man1dir ?= $(mandir)/man1

install: all
	$(INSTALL_PROGRAM) -vDt $(DESTDIR)$(bindir) $(srcdir)/interimap $(srcdir)/pullimap
	$(INSTALL_DATA) -vDT $(srcdir)/lib/Net/IMAP/InterIMAP.pm $(DESTDIR)$(datarootdir)/perl5/Net/IMAP/InterIMAP.pm
	-$(INSTALL_DATA) -vDt $(DESTDIR)$(man1dir) $(builddir)/doc/interimap.1 $(builddir)/doc/pullimap.1
	$(INSTALL_DATA) -vDt $(DESTDIR)$(datarootdir)/doc/pullimap $(srcdir)/pullimap.sample
	$(INSTALL_DATA) -vDt $(DESTDIR)$(datarootdir)/doc/interimap $(srcdir)/interimap.sample \
		$(srcdir)/doc/getting-started.md $(srcdir)/doc/multi-account.md $(srcdir)/README
	$(INSTALL_DATA) -vDt $(DESTDIR)$(libdir)/systemd/user $(srcdir)/*.service

uninstall:
	rm -vf -- $(DESTDIR)$(bindir)/interimap $(DESTDIR)$(man1dir)/interimap.1 $(DESTDIR)$(libdir)/systemd/user/interimap*.service
	rm -vf -- $(DESTDIR)$(bindir)/pullimap $(DESTDIR)$(man1dir)/pullimap.1 $(DESTDIR)$(libdir)/systemd/user/pullimap*.service
	rm -vf -- $(DESTDIR)$(datarootdir)/perl5/Net/IMAP/InterIMAP.pm
	rm -rvf -- $(DESTDIR)$(datarootdir)/doc/interimap $(DESTDIR)$(datarootdir)/doc/pullimap

clean:
	rm -vf -- $(MANUAL_FILES) $(HTML_FILES)
	-rmdir -vp --ignore-fail-on-non-empty -- $(builddir)/doc

.PHONY: all manual html doc test release install uninstall clean