#!/bin/bash
##################################################################################################
############################## Master Variables for unRAID scripts ################################
##################################################################################################

# Define the hostnames of both servers
HOST1="unRAID-Gmer4Lfe"
HOST2="unRAID-Jayred365"

# Detect local hostname
LOCAL_HOSTNAME="$(hostname)"

if [[ "$LOCAL_HOSTNAME" == "$HOST1" ]]; then
    LOCAL_SERVER_NAME="$HOST1"
    REMOTE_SERVER_NAME="$HOST2"
elif [[ "$LOCAL_HOSTNAME" == "$HOST2" ]]; then
    LOCAL_SERVER_NAME="$HOST2"
    REMOTE_SERVER_NAME="$HOST1"
else
    echo "Error: Local hostname ($LOCAL_HOSTNAME) not recognized."
    exit 1
fi

echo "Local server: $LOCAL_SERVER_NAME"
echo "Remote server: $REMOTE_SERVER_NAME"

# Resolve Tailscale IP dynamically, This will try to get the Tailscale IPv4 address for that host
REMOTE_SERVER=$(tailscale ip -4 "$REMOTE_SERVER_NAME" 2>/dev/null)
if [[ -z "$REMOTE_SERVER" ]]; then
    echo "Error: Could not resolve Tailscale IP for $REMOTE_SERVER_NAME"
    exit 1
fi

# SSH key mapping per hostpair
declare -A SSH_KEYS
SSH_KEYS["$HOST1|$HOST2"]="/root/.ssh/Gmer4Lfe-rsync-key"
SSH_KEYS["$HOST2|$HOST1"]="/root/.ssh/Jayred365-rsync-key"

KEY_ID="$LOCAL_SERVER_NAME|$REMOTE_SERVER_NAME"

if [[ -n "${SSH_KEYS[$KEY_ID]}" ]]; then
    SSH_KEY="${SSH_KEYS[$KEY_ID]}"
else
    echo "Error: No SSH key defined for $LOCAL_SERVER_NAME → $REMOTE_SERVER_NAME"
    exit 1
fi

echo "Using SSH key: $SSH_KEY"

# Network speed limit 100Mbps=12500 KB/s, 200Mbps=25600 KB/s
BW_LIMIT=12500

# Amount of times to retry
RETRY_COUNT=3

# Time in seconds waiting to retry
SLEEP=300

# Max number of concurrently running rsync processes
MAX_RSYNC_PROCS=1

# Containers to stop/start on backup server
CRITICAL_CONTAINER_NAMES=()

# Containers from CRITICAL_CONTAINER_NAMES that should have delayed startup
DELAYED_CONTAINERS=()

# Time in seconds to delay the listed containers
CONTAINER_DELAY=5