SHELL := /bin/bash

ifndef SHELLFLAGS
	SHELLFLAGS :=
endif

.SHELLFLAGS := -eu -o pipefail ${SHELLFLAGS} -c
MAKEFLAGS += --warn-undefined-variables
MAKEFLAGS += --no-builtin-rules
FIND := $(if $(wildcard /bin/find),/bin/find,/usr/bin/find)

ifndef OS
	OS := unknown
endif

ifeq (${OS},Windows_NT)
# 	Windows terminal is confusing it with its `cmd` builtin `rename` command
	ifndef RENAME_BIN
		RENAME_BIN := perl scripts/rename
	endif

	ifndef ACTIVATE_SCRIPT
		ACTIVATE_SCRIPT := pyenv/Scripts/activate
	endif

	ifndef PYTHON_BIN
		PYTHON_BIN := python
	endif
else
	ifndef RENAME_BIN
		RENAME_BIN := scripts/rename
	endif

	ifndef ACTIVATE_SCRIPT
		ACTIVATE_SCRIPT := pyenv/bin/activate
	endif

	ifndef PYTHON_BIN
		PYTHON_BIN := python3
	endif
endif

ifndef ANKI_EXTRA_PIP
	ANKI_EXTRA_PIP := true
endif

.DELETE_ON_ERROR:
SUBMAKE := $(MAKE) --print-directory
.SUFFIXES:

BUILDFLAGS := --release --strip
DEVFLAGS := $(BUILDFLAGS)
RUNFLAGS :=
CHECKABLE_PY := pylib qt
CHECKABLE_RS := rslib rspy
DEVEL := rslib rspy pylib qt

.PHONY: all
all: run

# - modern pip required for wheel
# - add qt if missing
pyenv:
# 	https://github.com/PyO3/maturin/issues/283 - Expected `python` to be a python interpreter inside a virtualenv
	set -eu -o pipefail ${SHELLFLAGS}; \
	"${PYTHON_BIN}" -m pip install virtualenv; \
	"${PYTHON_BIN}" -m venv pyenv; \
	case "$$(uname -s)" in CYGWIN*|MINGW*|MSYS*) \
		dos2unix "${ACTIVATE_SCRIPT}"; \
		VIRTUAL_ENV="$$(pwd)"; \
		VIRTUAL_ENV="$$(cygpath -m "$${VIRTUAL_ENV}")"; \
		sed -i -- "s@VIRTUAL_ENV=\".*\"@VIRTUAL_ENV=\"$$(pwd)/pyenv\"@g" "${ACTIVATE_SCRIPT}"; \
		sed -i -- "s@export PATH@export PATH; VIRTUAL_ENV=\"$${VIRTUAL_ENV}/pyenv\";@g" "${ACTIVATE_SCRIPT}"; \
		;; esac; \
	. "${ACTIVATE_SCRIPT}"; \
	python --version; \
	python -m pip install --upgrade pip setuptools; \
	${ANKI_EXTRA_PIP}; \
	if ! python -c 'import PyQt5' 2>/dev/null; then \
		python -m pip install -r qt/requirements.qt; \
	fi;

# update build hash
.PHONY: buildhash
buildhash:
	@set -eu -o pipefail ${SHELLFLAGS}; \
	oldhash=$$(test -f meta/buildhash && cat meta/buildhash || true); \
	newhash=$$(git rev-parse --short=8 HEAD || echo dev); \
	if [ "$$oldhash" != "$$newhash" ]; then \
		echo $$newhash > meta/buildhash; \
	fi

.PHONY: develop
develop: pyenv buildhash prepare
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	for dir in $(DEVEL); do \
		$(SUBMAKE) -C $$dir develop DEVFLAGS="$(DEVFLAGS)"; \
	done

.PHONY: run
run: develop
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	echo "Starting Anki..."; \
	python qt/runanki $(RUNFLAGS)

.PHONY: prepare
prepare: rslib/ftl/repo qt/ftl/repo qt/po/repo

rslib/ftl/repo:
	$(MAKE) pull-i18n
qt/ftl/repo:
	$(MAKE) pull-i18n
qt/po/repo:
	$(MAKE) pull-i18n

.PHONY: build
build: clean-dist build-rspy build-pylib build-qt add-buildhash
	@echo
	@echo "Build complete."

.PHONY: build-rspy
build-rspy: pyenv buildhash
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	$(SUBMAKE) -C rspy build BUILDFLAGS="$(BUILDFLAGS)"

.PHONY: build-pylib
build-pylib:
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	$(SUBMAKE) -C pylib build

.PHONY: build-qt
build-qt:
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	$(SUBMAKE) -C qt build

.PHONY: clean
clean: clean-dist
	@set -eu -o pipefail ${SHELLFLAGS}; \
	for dir in $(DEVEL); do \
		$(SUBMAKE) -C $$dir clean; \
	done

# remove any files in dist/ folder without current build hash
.PHONY: clean-dist
clean-dist: buildhash
	"${FIND}" dist \! -name "*$$(cat meta/buildhash)*" -type f -delete

.PHONY: check
check: pyenv buildhash prepare
	@set -eu -o pipefail ${SHELLFLAGS}; \
	.github/scripts/trailing-newlines.sh; \
	. "${ACTIVATE_SCRIPT}"; \
	for dir in $(CHECKABLE_RS) $(CHECKABLE_PY); do \
		$(SUBMAKE) -C $$dir check; \
	done;
	@echo
	@echo "All checks passed!"

.PHONY: fix
fix:
	@set -eu -o pipefail ${SHELLFLAGS}; \
	. "${ACTIVATE_SCRIPT}"; \
	for dir in $(CHECKABLE_RS) $(CHECKABLE_PY); do \
		$(SUBMAKE) -C $$dir fix; \
	done; \

.PHONY: add-buildhash
add-buildhash:
	@set -eu -o pipefail ${SHELLFLAGS}; \
	ver="$$(cat meta/version)"; \
	hash="$$(cat meta/buildhash)"; \
	${RENAME_BIN} -f "s/-$${ver}(\.|-)/-$${ver}+$${hash}\$$1/" dist/*-"$${ver}"*


.PHONY: pull-i18n
pull-i18n:
	(cd rslib/ftl && scripts/fetch-latest-translations)
	(cd qt/ftl && scripts/fetch-latest-translations)
	(cd qt/po && scripts/fetch-latest-translations)

.PHONY: push-i18n-ftl
push-i18n-ftl: pull-i18n
	(cd rslib/ftl && scripts/upload-latest-templates)
	(cd qt/ftl && scripts/upload-latest-templates)

.PHONY: push-i18n-po
push-i18n-po: pull-i18n
	(cd qt/po && scripts/upload-latest-template)