#!/bin/bash
set -e

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

# Load configs & helpers
source "$SCRIPT_DIR/../Master.conf"
source "$SCRIPT_DIR/../common.sh"

# ----------------------------- Input -----------------------------
DIRECTORY="$1"
if [[ -z "$DIRECTORY" ]]; then
    echo "Usage: $0 <directory-to-sync> [--dry-run] [VAR=value ...]"
    exit 1
fi
shift
parse_args "$@"

# ----------------------------- Hosts & IP -----------------------------
detect_hosts
resolve_remote_ip

# ----------------------------- Profile -----------------------------
PROFILE_NAME=$(basename "$DIRECTORY" | tr '[:upper:]' '[:lower:]')

MAX_RSYNC_PROCS=${PROFILE_MAX_PROCS[$PROFILE_NAME]:-$MAX_RSYNC_PROCS}
BW_LIMIT=${PROFILE_BW_LIMIT[$PROFILE_NAME]:-$BW_LIMIT}
CRITICAL_CONTAINER_NAMES=(${PROFILE_CRITICAL_CONTAINER_NAMES[$PROFILE_NAME]})
DELAYED_CONTAINERS=(${PROFILE_DELAYED_CONTAINERS[$PROFILE_NAME]})
CONTAINER_DELAY=${PROFILE_CONTAINER_DELAY[$PROFILE_NAME]:-$CONTAINER_DELAY}
RETRY_COUNT=${PROFILE_RETRY_COUNT[$PROFILE_NAME]:-$RETRY_COUNT}
SLEEP=${PROFILE_SLEEP[$PROFILE_NAME]:-$SLEEP}
EXCLUDE_DIRS=(${PROFILE_EXCLUDE_DIRS[$PROFILE_NAME]:-${EXCLUDE_DIRS[@]}})

echo "Detected profile: $PROFILE_NAME"
log "Profile settings: MAX_RSYNC_PROCS=$MAX_RSYNC_PROCS, BW_LIMIT=$BW_LIMIT, CONTAINERS=${CRITICAL_CONTAINER_NAMES[*]}, EXCLUDES=${EXCLUDE_DIRS[*]}, DRY_RUN=$DRY_RUN"

# ----------------------------- Rsync Wait -----------------------------
wait_for_rsync() {
    for attempt in $(seq 1 "$RETRY_COUNT"); do
        RSYNC_COUNT=$(pgrep -fc "rsync.*root@${REMOTE_SERVER}" || true)
        log "Current rsync processes: $RSYNC_COUNT"
        if [ "$RSYNC_COUNT" -ge "$MAX_RSYNC_PROCS" ]; then
            echo "Waiting for available rsync slot ($RSYNC_COUNT active)..."
            sleep "$SLEEP"
        else
            return 0
        fi
    done
    echo "Too many rsync processes, exiting."
    exit 1
}

# ----------------------------- Main -----------------------------
main() {
    echo "Starting sync: $DIRECTORY → $REMOTE_SERVER"
    wait_for_rsync
    stop_containers
    get_rsync_opts

    for ex in "${EXCLUDE_DIRS[@]}"; do RSYNC_OPTS+=(--exclude="$ex"); done
    [ "$DRY_RUN" = true ] && RSYNC_OPTS+=("--dry-run")
    log "Rsync options: ${RSYNC_OPTS[*]}"

    for attempt in $(seq 1 "$RETRY_COUNT"); do
        echo "Rsync attempt $attempt/$RETRY_COUNT..."
        if rsync "${RSYNC_OPTS[@]}" -e "ssh -i \"$SSH_KEY\" -T -o Compression=no -o IPQoS=throughput" \
            "$DIRECTORY" "root@${REMOTE_SERVER}:$DIRECTORY"; then
            echo "Rsync completed successfully."
            break
        else
            echo "Rsync attempt $attempt failed."
            if [ "$attempt" -lt "$RETRY_COUNT" ]; then
                echo "Retrying in $SLEEP seconds..."
                sleep "$SLEEP"
            else
                echo "All $RETRY_COUNT rsync attempts failed."
                start_containers
                exit 1
            fi
        fi
    done

    start_containers
    echo "Sync complete."
    log "[$LOCAL_SERVER_NAME] Sync finished for $DIRECTORY → $REMOTE_SERVER"
}

main