PORT ?= 8081
OUTPUT ?= output
FLAGS ?=
MAKE = make FLAGS=$(FLAGS)

# First goal is the default with `make`.

# List make scripts.
list:
	grep "^[^[:space:]]*:" Makefile --before-context=1 --group-separator=""

## Using make dependencies is duplicating behaviour but reads better.
# /bin/php php/update-listing.php
# Refresh listing and generate HTML.
all: fetch html

# Fetch room listing.
fetch:
	/bin/php php/fetch-servers.php $(FLAGS)

# Generate HTML from data.
html:
	/bin/php php/generate-html.php $(FLAGS)

# Serve a local copy which responds to file changes.
dev: FLAGS = --verbose
dev: open
	$(MAKE) server &
	$(MAKE) watchdog

# (Last item run in foreground to receive interrupts.)

# Serve a local copy on LAN which responds to file changes.
lan-dev: FLAGS = --verbose
lan-dev: open
	-which ip 1>/dev/null 2>/dev/null && ip addr | fgrep -e ' 192.' -e ' 10.' || true
	$(MAKE) lan-server &
	$(MAKE) watchdog

# Serve a local copy.
server:
	/bin/php -S "localhost:$(PORT)" -t "$(OUTPUT)"

# Serve a local copy on all interfaces.
lan-server:
	/bin/php -S "0.0.0.0:$(PORT)" -t "$(OUTPUT)"

# Open locally served page in browser.
open:
	xdg-open "http://localhost:$(PORT)" >/dev/null 2>/dev/null & disown

# Update HTML on file change. Doesn't check for new files.
watchdog:
	find . | grep -v ".git" | entr -n -s "$(MAKE) html"

# Remove artefacts
clean:
	-rm -r cache 2>/dev/null || true
	-rm -r output/*.html 2>/dev/null || true

# Build everything from scratch and test functionality.
test: FLAGS = --verbose
test: clean all open server

# Build everything from scratch and test functionality on LAN.
test-lan: FLAGS = --verbose
test-lan: clean all open lan-server

# -- Aliases --
serve: server

lan-serve: lan-server

data: fetch

watch: watchdog