CABALFLAGS ?= --jobs --enable-optimization

DATADIR  := data
TMPDIR   := _tmp
BUILDDIR := _build
INFONAME := info.yaml
ROOT     := https://gallery.niss.website

# SMALL = thumbnails, MED = single pages (link to full size)
SMALL := 200
MEDW  := 1000
MEDH  := 1200

MAKEPAGES := $(TMPDIR)/make-pages

YAMLS != find -L $(DATADIR) -name $(INFONAME)

SCRIPTS   != find script -name '*.js'
STYLES    != find style -name '*.css'
STYLESVGS != find style -name '*.svg'
STYLEPNGS != find style -name '*.png'

FONTS != find fonts \
  -iname '*.eot'   -or -iname '*.svg'  -or \
  -iname '*.ttf'   -or -iname '*.woff' -or \
  -iname '*.woff2' -or -iname '*.css'

STATIC  = $(SCRIPTS) $(STYLES) $(STYLEPNGS) $(STYLESVGS) $(FONTS)
BSTATIC = $(patsubst %,$(BUILDDIR)/%,$(STATIC))

.PHONY: all build
all: build
build: $(BUILDDIR)/index.html $(BSTATIC)

$(BUILDDIR)/index.html: $(DATADIR)/index.yaml $(MAKEPAGES)
	echo "[index]   "$@
	mkdir -p $(dir $@)
	$(MAKEPAGES) $(MPFLAGS) index --root $(ROOT) $< --output $@


$(BUILDDIR)/%: %
	$(call copy)

$(BUILDDIR)/%: $(TMPDIR)/%
	$(call copy,--link)


$(TMPDIR)/%_small.png: $(DATADIR)/%.png
	$(call resize,$(SMALL),$(SMALL),^,-gravity center -crop 1:1+0)

$(TMPDIR)/%_med.png: $(DATADIR)/%.png
	$(call resize,$(MEDW),$(MEDH),>)


$(TMPDIR)/%_small.jpg: $(DATADIR)/%.jpg
	$(call resize,$(SMALL),$(SMALL),^,-gravity center -crop 1:1+0)

$(TMPDIR)/%_med.jpg: $(DATADIR)/%.jpg
	$(call resize,$(MEDW),$(MEDH),>)


$(MAKEPAGES): make-pages/*.hs make-pages/make-pages.cabal
	echo "[make-pages]"
	mkdir -p $(dir $@)
	cabal v2-build all $(CABALFLAGS)
	find dist-newstyle -name make-pages -executable -type f \
	  -exec cp {} $@ \;


$(TMPDIR)/index.mk: $(DATADIR)/index.yaml $(YAMLS) $(MAKEPAGES)
	$(call depend-gallery)

NODEPS := mostlyclean clean distclean list-tags
GOALS := $(if $(strip $(MAKECMDGOALS)),$(strip $(MAKECMDGOALS)),all)
ifneq ($(filter-out $(NODEPS),$(GOALS)),)
include $(TMPDIR)/index.mk
endif


.PHONY: clean distclean
clean:
	echo "[clean $(BUILDDIR)]"
	rm -rf $(BUILDDIR)
distclean: clean
	echo "[clean $(TMPDIR)]"
	rm -rf $(TMPDIR)
	echo "[cabal clean]"
	cabal --verbose=0 v2-clean


.PHONY: list-tags
list-tags: $(MAKEPAGES)
	$(MAKEPAGES) list-tags --untagged --nsfw


HOST        ?= gallery.niss.website
REMOTE_USER ?= www-data
IDFILE      ?= ~/.ssh/xyz
REMOTE_DIR  ?= gallery

.PHONY: upload
upload: build
	@rsync --recursive --partial --progress --copy-links \
	       --compress --human-readable --hard-links --size-only \
	       --delete --delete-after \
	       --rsh='ssh -l $(REMOTE_USER) -i $(IDFILE)' \
	       $(BUILDDIR)/ $(HOST):$(REMOTE_DIR)/


# one arg for extra flags
define copy
echo "[copy]    "$@
mkdir -p "$(dir $@)"
cp $(1) --dereference "$^" "$@"
endef

# args:
#  1. width
#  2. height
#  3. imagemagick resize hint (^, <, !, etc)
#  4. other flags (e.g. cropping)
define resize
echo "[resize]  "$@
mkdir -p "$(dir $@)"
convert -resize "$(1)x$(2)$(3)" $(4) "$^" "$@"
endef

# no args
define depend-gallery
echo "[deps]    "$@
mkdir -p $(dir $@)
$(MAKEPAGES) $(MPFLAGS) depend-gallery $< \
  --output "$@" \
  --build-dir "$(BUILDDIR)" \
  --data-dir "$(DATADIR)" \
  --tmp-dir "$(TMPDIR)" \
  --info "$(INFONAME)"
endef

# args:
#  1. gallery prefix
#  2. build dir
#  3. data dir
#  4. other flags
define depend-single
echo "[deps]    "$@
mkdir -p "$(dir $@)"
$(MAKEPAGES) $(MPFLAGS) depend-single $(4) \
  --output "$@" \
  --prefix "$(1)" \
  --build-dir "$(2)" \
  --data-dir "$(3)" $<
endef

# args
#  1. index file
#  2. gallery prefix
#  3. other flags
define gallery
echo "[gallery] "$@
mkdir -p "$(dir $@)"
$(MAKEPAGES) $(MPFLAGS) gallery $(3) \
  --index "$(1)" \
  --root "$(ROOT)" \
  --prefix "$(2)" \
  --output "$@" \
  $(filter $(DATADIR)/%/$(INFONAME),$^)
endef

# args:
#  1. data dir
#  2. gallery prefix
#  3. other flags
define single
echo "[single]  "$@
mkdir -p "$(dir $@)"
$(MAKEPAGES) $(MPFLAGS) single $(3) \
  --root $(ROOT) \
  --data-dir "$(1)" \
  --prefix "$(2)" \
  --output "$@" \
  $<
endef

# args:
#  1. index file
#  2. gallery prefix
#  3. data dir
#  4. other flags
define rss
echo "[rss]     "$@
mkdir -p "$(dir $@)"
$(MAKEPAGES) $(MPFLAGS) rss $(4) \
  --index "$(1)" \
  --root "$(ROOT)" \
  --prefix "$(2)" \
  --data-dir "$(3)" \
  --output "$@" \
  $(filter $(DATADIR)/%/$(INFONAME),$^)
endef


# never delete intermediate files
.SECONDARY:

.SILENT: