#!/usr/bin/env bash
# raiden-synk.sh — rsynk /mnt/raiden/hot to /mnt/raiden/cold
# Usage: raiden-synk.sh [--dry-run]

SRC="/mnt/raiden/hot/"
DST="/mnt/raiden/cold/"
LOG="/mnt/raiden/cold/raiden-synk.log"

# ── colours ───────────────────────────────────────────────────────────────────
RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
info()  { echo -e "${GREEN}[✔]${NC} $*" | tee -a "$LOG"; }
warn()  { echo -e "${YELLOW}[!]${NC} $*" | tee -a "$LOG"; }
error() { echo -e "${RED}[✘]${NC} $*" | tee -a "$LOG"; exit 1; }

# ── preflight checks ──────────────────────────────────────────────────────────
echo "" | tee -a "$LOG"
info "$(date '+%Y-%m-%d %H:%M:%S') — raiden-synk starting"

# Vaults mounted?
mountpoint -q "$SRC" || error "Hot vault not mounted at $SRC — open it first"
mountpoint -q "$DST" || error "Cold vault not mounted at $DST — open it first"

info "Source : $SRC"
info "Dest   : $DST"

# ── dry run? ──────────────────────────────────────────────────────────────────
DRYRUN=""
if [ "$1" = "--dry-run" ]; then
    DRYRUN="--dry-run"
    warn "Dry run mode — no files will be written"
fi

# ── rsync ─────────────────────────────────────────────────────────────────────
rsync -avh --progress --delete --exclude=Thumbs.db:encryptable --exclude=Thumbs.db --exclude=debug.log \
    $DRYRUN \
    "$SRC" "$DST" \
    | tee -a "$LOG"

STATUS=${PIPESTATUS[0]}

# ── result ────────────────────────────────────────────────────────────────────
if [ "$STATUS" -eq 0 ]; then
    info "Sync complete."
elif [ "$STATUS" -eq 24 ]; then
    warn "Sync complete with warnings (some files vanished during transfer — usually harmless)."
else
    error "rsync failed with exit code $STATUS"
fi