#!/usr/bin/env bash
# shellcheck shell=bash
#
# Wipe the on-disk caches that the `cache` compose profile populates:
# the rpardini/docker-registry-proxy mirror + MITM CA, and the
# Sonatype Nexus 3 OSS data dir. Both live under /var/cache/infinito/
# core/<service>/ by default; the per-cache env scripts under
# scripts/meta/env/cache/ are sourced first so a custom HOST_PATH
# from the developer's environment is honoured.
#
# Removing the directories is enough: docker compose recreates them
# on the next `up` thanks to `bind: { create_host_path: true }`. For
# the Nexus side, the next bootstrap rotates a fresh admin password
# and re-creates blobstore + proxy repos.
#
# Use `make clean-cache` rather than calling this script directly.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/../../.." && pwd)"
cd "${REPO_ROOT}"

# shellcheck source=scripts/meta/env/load.sh
source "scripts/meta/env/load.sh"
# shellcheck source=scripts/meta/env/load.sh
source "scripts/meta/env/load.sh"

if docker ps --format '{{.Names}}' | grep -qE '^infinito-(registry|package)-cache$'; then
	echo "[clean-cache] stopping infinito-registry-cache + infinito-package-cache"
	docker stop infinito-registry-cache infinito-package-cache 2>/dev/null || true # nocheck: shell-or-true -- grandfathered: worked in practice; TODO: sharpen to catch only the exact tolerated error
	docker rm infinito-registry-cache infinito-package-cache 2>/dev/null || true   # nocheck: shell-or-true -- grandfathered: worked in practice; TODO: sharpen to catch only the exact tolerated error
fi

PATHS=(
	"${INFINITO_CACHE_REGISTRY_HOST_PATH}"
	"${INFINITO_CACHE_REGISTRY_CA_HOST_PATH}"
	"${INFINITO_CACHE_PACKAGE_HOST_PATH}"
)

# Remove each cache path individually (keeps the parent /var/cache/
# infinito/ dir alive so other future cache services can co-locate).
# Use sudo when the path is root-owned (Nexus chowns its data dir to
# uid 200 for the in-container nexus user) so the rm does not silently
# leave half-deleted state behind.
remove_path() {
	local p="$1"
	[[ -z "${p}" ]] && return 0
	if [[ ! -e "${p}" ]]; then
		echo "[clean-cache] not present, skipping: ${p}"
		return 0
	fi
	if [[ -w "${p}" ]] || [[ -O "${p}" ]]; then
		echo "[clean-cache] removing: ${p}"
		rm -rf -- "${p}"
	else
		echo "[clean-cache] removing (sudo): ${p}"
		sudo rm -rf -- "${p}"
	fi
}

remove_path "${PATHS[0]}"
remove_path "${PATHS[1]}"
remove_path "${PATHS[2]}"

echo "[clean-cache] done. Re-run 'make compose-up' to recreate empty caches."