#!/usr/bin/env bash
# Replicate objects from vps-0 (hot) → black (cold) for the platform's MinIO buckets.
# Uses `mc mirror`, which is incremental + idempotent.
#
# Run on BLACK, on a cron/systemd-timer (e.g., every 15 min).
# Buckets configured below — extend BUCKETS array as new ones are created.

set -euo pipefail

# mc alias names — configure once via `mc alias set ...`
SRC_ALIAS="${SRC_ALIAS:-platform-vps0}"
DST_ALIAS="${DST_ALIAS:-platform-black}"

# Buckets to replicate (extend as features add new buckets)
BUCKETS=(
    "platform-media"
    "platform-uploads"
    "platform-exports"
)

if ! command -v mc &>/dev/null; then
    echo "ERROR: mc (minio client) not found" >&2
    echo "  install: dnf install minio-mc  OR  https://min.io/docs/minio/linux/reference/minio-mc.html" >&2
    exit 1
fi

# Sanity: aliases must exist
for alias in "$SRC_ALIAS" "$DST_ALIAS"; do
    if ! mc alias list | grep -q "^${alias}\b"; then
        echo "ERROR: mc alias '${alias}' not configured. Run:" >&2
        echo "  mc alias set ${alias} https://<endpoint> <access> <secret>" >&2
        exit 1
    fi
done

for bucket in "${BUCKETS[@]}"; do
    echo "==> mirror ${SRC_ALIAS}/${bucket} → ${DST_ALIAS}/${bucket}"
    # --overwrite: replace newer on dst with newer on src; --remove: prune deletes
    mc mirror --overwrite --remove \
        "${SRC_ALIAS}/${bucket}" "${DST_ALIAS}/${bucket}" \
        2>&1 | tail -5
done

echo "done."