LATEXMK   := latexmk
SRCDIR    := paper/src
BUILDDIR  := build
TEX       := main.tex
JOBNAME   := main
PDF       := paper/$(BUILDDIR)/$(JOBNAME).pdf
VENV      := .venv
PYTHON    := $(VENV)/bin/python
PIP       := $(VENV)/bin/pip
PYTEST    := $(VENV)/bin/pytest
TPU_NAME  ?= phantom-tpu
TPU_ZONE  ?= us-central2-b
TPU_TYPE  ?= v4-32
TPU_RUNTIME ?= tpu-vm-v4-base
TPU_PROJECT ?= phantom-trc
TPU_NETWORK ?= default
TPU_SUBNETWORK ?= default-us-central2
TPU_USE_SPOT ?= 0
TPU_EXTRA_CREATE_FLAGS ?=
TPU_WORKDIR ?= ~/PHANTOM
TPU_SYNC_PATHS ?= engine lib requirements.txt Makefile .env
TPU_TRAIN_ARGS ?= --algo ppo --jax --total-timesteps 20000
TPU_JAX_WHEEL_URL ?= https://storage.googleapis.com/jax-releases/libtpu_releases.html
TPU_VENV ?= .venv-tpu
TPU_TRAIN_ENV ?= PHANTOM_USE_JAX=1 WANDB_MODE=offline
TPU_SPOT_FLAG := $(if $(filter 1 true TRUE yes YES,$(TPU_USE_SPOT)),--spot,)
TPU_CREATE_CMD = gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm create "$(TPU_NAME)" --zone="$(TPU_ZONE)" --accelerator-type="$(TPU_TYPE)" --version="$(TPU_RUNTIME)" --network="$(TPU_NETWORK)" --subnetwork="$(TPU_SUBNETWORK)" $(TPU_SPOT_FLAG) $(TPU_EXTRA_CREATE_FLAGS)

.DEFAULT_GOAL := help

.PHONY: help
help:
	@echo "pdf.build pdf.watch pdf.clean | test.backend test.e2e test.all | web.dev | install | stats.lines | tpu.*"
	@echo "TPU presets: tpu.create.v4.ondemand | tpu.create.v4.spot"

$(BUILDDIR):
	mkdir -p paper/$(BUILDDIR)

.PHONY: pdf.build
pdf.build: $(BUILDDIR)
	@bash paper/concat_code.sh
	@cd $(SRCDIR) && \
	$(LATEXMK) -pdf -jobname=$(JOBNAME) -f \
		-interaction=nonstopmode -file-line-error \
		-r ../.latexmkrc \
		-outdir=../$(BUILDDIR) $(TEX)

.PHONY: pdf.watch
pdf.watch: $(BUILDDIR)
	@cd $(SRCDIR) && \
	$(LATEXMK) -pvc -pdf -jobname=$(JOBNAME) -f \
		-interaction=nonstopmode -file-line-error \
		-r ../.latexmkrc \
		-outdir=../$(BUILDDIR) $(TEX)

.PHONY: pdf.clean
pdf.clean:
	@cd $(SRCDIR) && \
	$(LATEXMK) -C -jobname=$(JOBNAME) -outdir=../$(BUILDDIR) || true
	rm -rf paper/$(BUILDDIR)/*

.PHONY: test.backend
test.backend: $(VENV)
	$(PYTEST) -v

.PHONY: test.e2e
test.e2e:
	@cd tests/e2e && npm install
	@cd tests/e2e && npx playwright install chromium
	@test -f tests/e2e/.env || cp tests/e2e/.env.example tests/e2e/.env
	@timeout 30 bash -c 'until curl -sf http://localhost:5000/health > /dev/null 2>&1; do sleep 1; done' || (echo "Backend not ready" && exit 1)
	@timeout 30 bash -c 'until curl -sf http://localhost:3000 > /dev/null 2>&1; do sleep 1; done' || (echo "Web app not ready" && exit 1)
	@timeout 30 bash -c 'until curl -sf http://localhost:8085/health > /dev/null 2>&1; do sleep 1; done' || (echo "Airflow not ready" && exit 1)
	@cd tests/e2e && npm test

.PHONY: test.all
test.all: test.backend test.e2e

.PHONY: web.dev
web.dev:
	@cd web && npm install && npm run dev

$(VENV):
	python3 -m venv $(VENV)
	$(PIP) install --upgrade pip

.PHONY: install
install: $(VENV)
	$(PIP) install -r requirements.txt

.PHONY: tpu.setup
tpu.setup:
	@command -v gcloud >/dev/null 2>&1 || (echo "gcloud CLI not found. Install from https://cloud.google.com/sdk/docs/install" && exit 1)
	@gcloud auth login --update-adc
	@gcloud auth application-default login
	@gcloud config set project "$(TPU_PROJECT)"

.PHONY: tpu.check.zone
tpu.check.zone:
	@case "$(TPU_ZONE)" in \
		europe-west4-a|us-central2-b|us-central1-a|us-east1-d|europe-west4-b) ;; \
		*) echo "Unsupported TPU_ZONE='$(TPU_ZONE)'. Allowed zones: europe-west4-a us-central2-b us-central1-a us-east1-d europe-west4-b"; exit 1 ;; \
	 esac

.PHONY: tpu.create.v4.ondemand
tpu.create.v4.ondemand:
	$(MAKE) tpu.create TPU_ZONE=us-central2-b TPU_TYPE=v4-32 TPU_USE_SPOT=0 TPU_SUBNETWORK=default-us-central2

.PHONY: tpu.create.v4.spot
tpu.create.v4.spot:
	$(MAKE) tpu.create TPU_ZONE=us-central2-b TPU_TYPE=v4-32 TPU_USE_SPOT=1 TPU_SUBNETWORK=default-us-central2

.PHONY: tpu.create
tpu.create: tpu.check.zone
	@if gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm describe "$(TPU_NAME)" --zone="$(TPU_ZONE)" >/dev/null 2>&1; then \
		STATE=$$(gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm describe "$(TPU_NAME)" --zone="$(TPU_ZONE)" --format='value(state)'); \
		echo "TPU VM $(TPU_NAME) already exists in $(TPU_ZONE) with state=$$STATE, skipping create"; \
	else \
		$(TPU_CREATE_CMD); \
	fi

.PHONY: tpu.ensure
tpu.ensure: tpu.check.zone
	@set -e; \
	STATE=$$(gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm describe "$(TPU_NAME)" --zone="$(TPU_ZONE)" --format='value(state)' 2>/dev/null || true); \
	if [ -z "$$STATE" ]; then \
		echo "TPU VM $(TPU_NAME) not found in $(TPU_ZONE), creating"; \
		$(TPU_CREATE_CMD); \
	elif [ "$$STATE" = "READY" ]; then \
		echo "TPU VM $(TPU_NAME) is READY"; \
	elif [ "$$STATE" = "PREEMPTED" ] || [ "$$STATE" = "TERMINATED" ] || [ "$$STATE" = "FAILED" ]; then \
		echo "TPU VM $(TPU_NAME) is in terminal state $$STATE, recreating"; \
		gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm delete "$(TPU_NAME)" --zone="$(TPU_ZONE)" --quiet || true; \
		$(TPU_CREATE_CMD); \
	else \
		echo "TPU VM $(TPU_NAME) is in state $$STATE; wait or recreate manually"; \
		exit 1; \
	fi

.PHONY: tpu.status
tpu.status:
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm describe "$(TPU_NAME)" --zone="$(TPU_ZONE)"

.PHONY: tpu.ssh
tpu.ssh:
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm ssh "$(TPU_NAME)" --zone="$(TPU_ZONE)"

.PHONY: tpu.prepare
tpu.prepare: tpu.ensure
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm ssh "$(TPU_NAME)" --zone="$(TPU_ZONE)" --command "mkdir -p $(TPU_WORKDIR)"

.PHONY: tpu.deploy
tpu.deploy: tpu.prepare
	@for p in $(TPU_SYNC_PATHS); do \
		if [ ! -e "$$p" ]; then continue; fi; \
		if [ -d "$$p" ]; then \
			gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm scp --recurse "$$p" "$(TPU_NAME):$(TPU_WORKDIR)/$$p" --zone="$(TPU_ZONE)"; \
		else \
			gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm scp "$$p" "$(TPU_NAME):$(TPU_WORKDIR)/$$p" --zone="$(TPU_ZONE)"; \
		fi; \
	done

.PHONY: tpu.install
tpu.install: tpu.ensure
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm ssh "$(TPU_NAME)" --zone="$(TPU_ZONE)" --command 'cd $(TPU_WORKDIR) && PYBIN=$$(command -v python3.11 || command -v python3.10 || command -v python3) && $$PYBIN -m venv $(TPU_VENV) && $(TPU_VENV)/bin/pip install --upgrade pip setuptools wheel && $(TPU_VENV)/bin/pip install -r requirements.txt && $(TPU_VENV)/bin/pip install -r engine/jax/requirements.txt && $(TPU_VENV)/bin/pip install "jax[tpu]" -f $(TPU_JAX_WHEEL_URL)'

.PHONY: tpu.check.remote
tpu.check.remote: tpu.ensure
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm ssh "$(TPU_NAME)" --zone="$(TPU_ZONE)" --command 'set -e; mkdir -p $(TPU_WORKDIR); cd $(TPU_WORKDIR); test -f engine/train.py || (echo "Missing code on TPU VM. Run: make tpu.deploy" && exit 2); test -x $(TPU_VENV)/bin/python || (echo "Missing TPU venv. Run: make tpu.install" && exit 3)'

.PHONY: tpu.train
tpu.train: tpu.check.remote
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm ssh "$(TPU_NAME)" --zone="$(TPU_ZONE)" --command 'cd $(TPU_WORKDIR) && if [ -f .env ]; then set -a && . ./.env && set +a; fi && $(TPU_TRAIN_ENV) $(TPU_VENV)/bin/python -m engine.train $(TPU_TRAIN_ARGS)'

.PHONY: tpu.bootstrap
tpu.bootstrap: tpu.ensure tpu.deploy tpu.install

.PHONY: tpu.delete
tpu.delete:
	gcloud --project="$(TPU_PROJECT)" compute tpus tpu-vm delete "$(TPU_NAME)" --zone="$(TPU_ZONE)" --quiet

.PHONY: stats.lines
stats.lines:
	@find . \( -path '*/node_modules' -o -path '*/.venv' -o -path '*/venv' \) -prune -o \
	\( -name "*.ts" -o -name "*.py" \) -type f -print0 | xargs -0 cat | wc -l

.PHONY: wordcount
wordcount:
	@echo "Counting words in main text (excluding appendix)..."
	@texcount -nosub -total -sum -1 \
		$(SRCDIR)/chapters/01-intro.tex \
		$(SRCDIR)/chapters/02-literature-review.tex \
		$(SRCDIR)/chapters/03-methodology.tex \
		$(SRCDIR)/chapters/04-results.tex \
		$(SRCDIR)/chapters/05-discussion.tex \
		$(SRCDIR)/chapters/06-conclusion.tex


.PHONY: pdf clean watch run.webapp test count-lines all
pdf: pdf.build
clean: pdf.clean
watch: pdf.watch
run.webapp: web.dev
test: test.backend
count-lines: stats.lines
all: pdf.build