# if someone can come up with something better then i'd appreciate that.
# For now this is a bit complex but it gets the job done.
# It's still a ticking time bomb and I hope we can fix it before it explodes.
# Even if it explodes, it won't be that big of a deal.

# Input dir describes the directory that has the markdown we want to convert
# Static dir describes the directory that has files we should simply copy as-is
# Output dir describes the directory that we want our final result to be in.
INPUT_DIR=content
STATIC_DIR=static
OUTPUT_DIR=output
UTILS_DIR=utils

# The pandoc template to use
TEMPLATE=$(UTILS_DIR)/template.html

# The pandoc lua filter to use
# The language code and file extension will be appended later
FILTER=$(UTILS_DIR)/link-filter.

## You should not need to change anything beyond this line



STATIC=$(patsubst $(STATIC_DIR)/%,$(OUTPUT_DIR)/%,$(shell find $(STATIC_DIR) -type f))
OUTPUT=$(patsubst $(INPUT_DIR)/%.md,$(OUTPUT_DIR)/%/index.html,$(shell find $(INPUT_DIR) -type f))

# The last one is for the autogenerated authors thing. 
site: $(OUTPUT) $(STATIC) $(OUTPUT_DIR)/authors/index.html

# This generates the authors file.
$(OUTPUT_DIR)/authors/index.html: $(UTILS_DIR)/authors.md
	mkdir -p $(dir $@)
	pandoc --from markdown+smart+yaml_metadata_block+auto_identifiers -V lastmod="$(shell git log --follow --format=%ad --date default $< | tail -1)" --to html --template $(TEMPLATE) $< -o $@

# Generate normal markdown
$(OUTPUT_DIR)/%/index.html: $(INPUT_DIR)/%.md $(TEMPLATE)
	mkdir -p $(dir $@)
	pandoc --from markdown+smart+yaml_metadata_block+auto_identifiers -V lastmod="$(shell git log --follow --format=%ad --date default $< | tail -1)" --lua-filter=$(FILTER)$(shell echo $@ | cut -d / -f 2).lua --to html --template $(TEMPLATE) $< -o $@
	@# Pandoc indenting causes too many issues. From https://stackoverflow.com/a/68633114
	sed -i 's/^\s*<span/<span/g' "$@"
	sed -i 's/^\s*\([^<]\)/\1/g' "$@"
	$(eval DIRNAME != dirname $(subst index.html,,$@))
	@if [ -d "$(DIRNAME)/_index/" ]; then \
		mv $(DIRNAME)/_index/index.html $(DIRNAME); \
		rmdir $(DIRNAME)/_index/; \
	fi

# Copy straight from static dir
$(OUTPUT_DIR)/%: $(STATIC_DIR)/%
	mkdir -p $(dir $@)
	cp $< $@

# Remove everything in the output dir
clean:
	if [ -d "$(OUTPUT_DIR)" ]; then \
		rm -r "$(OUTPUT_DIR)"; \
	fi

## These rules are not used for wiki generation at all...
# So don't use them!
test:
	cd $(OUTPUT_DIR); python3 -m http.server 9000

mon:
	@echo "find $(INPUT_DIR)/ $(STATIC_DIR)/ $(dir $(TEMPLATE)) -type f | entr make"

.PHONY: clean test