IMAGE_NAME   := opencode-sandbox
IMAGE_TAG    := local
IMAGE        := $(IMAGE_NAME):$(IMAGE_TAG)
NETWORK_NAME := opencode-sandbox-net
WORKDIR_NAME := $(notdir $(patsubst %/,%,$(CURDIR)))
# OpenCode follows the XDG Base Directory spec with three distinct dirs:
# config (settings/plugins), data (auth.json, opencode.db, snapshots), and
# state (session/model history, locks) -- data and state are NOT the same
# directory, despite the similar names.
CONFIG_DIR   := $(HOME)/.config/opencode
DATA_DIR     := $(HOME)/.local/share/opencode
STATE_DIR    := $(HOME)/.local/state/opencode

# No :Z/:z SELinux suffixes: on macOS the host side (APFS) has no SELinux
# concept, so the labeling flag would be a meaningless no-op here.
#
# Known virtiofs caveat (default podman-machine file share on macOS/applehv):
# inotify file-change events don't propagate into the container. Not a
# blocker for this sandbox, just a rough edge if a tool relies on watching
# /workspace for live changes.
RUN_FLAGS := \
	--rm -it \
	--userns=keep-id \
	--network $(NETWORK_NAME) \
	--network-alias $(WORKDIR_NAME) \
	-v $(CURDIR):/workspace \
	-v $(CONFIG_DIR):/home/dev/.config/opencode \
	-v $(DATA_DIR):/home/dev/.local/share/opencode \
	-v $(STATE_DIR):/home/dev/.local/state/opencode \
	-w /workspace

.PHONY: build opencode shell

# Only relevant on macOS, where podman requires a running VM ("podman
# machine"). Handles "machine exists but stopped" -> start it. Does NOT
# handle "no machine exists at all" -- that needs a one-time manual
# `podman machine init`, left as a documented prerequisite since it's a
# heavier, resource-allocating operation.
#
# Written as a single shell line deliberately: macOS ships GNU Make 3.81
# (frozen pre-GPLv3), which predates `.ONESHELL:` (added in 3.82). Without
# it, Make runs a separate shell per newline in the *expanded* recipe text,
# which would split an if/then/fi block from a multi-line variable across
# unrelated shell invocations and break it. A single logical line sidesteps
# the issue entirely and works on any Make version.
define ENSURE_MACHINE
[ "$$(uname -s)" != "Darwin" ] || podman machine list --format '{{.Running}}' 2>/dev/null | grep -q '^true$$' || { echo "==> No running podman machine found; starting default machine..."; podman machine start; }
endef

# Idempotent: creates the shared cross-container network once, reused on
# every subsequent invocation. Any other Podman dev container joined to this
# same network name can resolve and reach this sandbox by its workdir alias.
define ENSURE_NETWORK
podman network exists $(NETWORK_NAME) || podman network create $(NETWORK_NAME)
endef

build:
	@$(ENSURE_MACHINE)
	podman build -t $(IMAGE) -f Containerfile .

opencode:
	@$(ENSURE_MACHINE)
	@$(ENSURE_NETWORK)
	podman run $(RUN_FLAGS) $(IMAGE) opencode

shell:
	@$(ENSURE_MACHINE)
	@$(ENSURE_NETWORK)
	podman run $(RUN_FLAGS) $(IMAGE) bash