#!/bin/bash
set -e
# ----------------------------------------------------------------------------------------------
# --------------------------------- Rsync Core Script ------------------------------------------
# ----------------------------------------------------------------------------------------------
# ---------------- User Variables, Please adjust in Master.conf as needed ----------------------
# ----------------------------------------------------------------------------------------------
#
# User variables can be adjusted in Master.conf
#
# Scripts now just contain runtime logic
#
# This new setup allows for profiles and arguments to use the core script
#
# Use arguments in unRAID User Plugin for directory
#   Example = /mnt/user/appdata/unraid_scripts/Rsync/rsync.sh --dry-run
# ----------------------------------------------------------------------------------------------
# -------------- End Of User Variables, Please adjust in Master.conf as needed -----------------
# ----------------------------------------------------------------------------------------------

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: $0 <directory-to-sync> [--dry-run] [VAR=value ...]"
    exit 1
fi
shift
parse_args "$@"

# ----------------------------- Host & 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[@]}})

# ----------------------------- Status Mode -----------------------------
if [[ "$SHOW_STATUS" == true ]]; then
    show_status
    exit 0
fi


# ----------------------------- User Info -----------------------------
echo "============================================================"
echo " Sync Job Starting"
echo "------------------------------------------------------------"
echo " Source:      $DIRECTORY"
echo " Destination: $REMOTE_SERVER:$DIRECTORY"
echo " Profile:     $PROFILE_NAME"
echo " Dry Run:     $DRY_RUN"
echo "============================================================"

log "Settings: MAX_RSYNC_PROCS=$MAX_RSYNC_PROCS, BW_LIMIT=$BW_LIMIT"
log "Containers: ${CRITICAL_CONTAINER_NAMES[*]}"
log "Excludes: ${EXCLUDE_DIRS[*]}"

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

# ----------------------------- Main -----------------------------
main() {
    echo ""
    echo "🔍 Checking remote connectivity..."

    for i in $(seq 1 "$RETRY_COUNT"); do
        if ping -c 1 "$REMOTE_SERVER" &>/dev/null; then
            echo "✅ Remote server reachable"
            break
        fi
        echo "⚠️  Remote down, retrying in $SLEEP seconds..."
        sleep "$SLEEP"
    done

    if ! ping -c 1 "$REMOTE_SERVER" &>/dev/null; then
        echo "❌ Remote server unreachable. Exiting."
        exit 1
    fi

    wait_for_rsync

    echo ""
    echo "🛑 Stopping containers on remote..."
    stop_containers

    echo ""
    echo "📦 Building rsync options..."
    get_rsync_opts

    for ex in "${EXCLUDE_DIRS[@]}"; do
        RSYNC_OPTS+=(--exclude="$ex")
    done

    [ "$DRY_RUN" = true ] && RSYNC_OPTS+=("--dry-run")

    log "Final rsync opts: ${RSYNC_OPTS[*]}"

    echo ""
    echo "🚀 Starting rsync..."

    for attempt in $(seq 1 "$RETRY_COUNT"); do
        echo "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 failed"

            if [ "$attempt" -lt "$RETRY_COUNT" ]; then
                echo "Retrying in $SLEEP seconds..."
                sleep "$SLEEP"
            else
                echo "💥 All retries failed"
                start_containers
                exit 1
            fi
        fi
    done

    echo ""
    echo "🔄 Restarting containers..."
    start_containers

    echo ""
    echo "🎉 Sync complete!"
}

main