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

# Hosts
HOST1="unRAID-Gmer4Lfe"
HOST2="unRAID-Jayred365"
HOST1_SSH_KEY="/root/.ssh/Gmer4Lfe-rsync-key"
HOST2_SSH_KEY="/root/.ssh/Jayred365-rsync-key"

# Rsync Defaults
BW_LIMIT=12500
RETRY_COUNT=3
SLEEP=300
MAX_RSYNC_PROCS=1
CRITICAL_CONTAINER_NAMES=("")
DELAYED_CONTAINERS=("")
CONTAINER_DELAY=5
EXCLUDE_DIRS=("")

# Profiles
declare -A PROFILE_MAX_PROCS=([arrs_stack]=2 [critical-data]=2 [gmer4lfe]=1 [important-data]=2 [emby]=1)
declare -A PROFILE_BW_LIMIT=([arrs_stack]=5000 [critical-data]=9500 [gmer4lfe]=8000 [important-data]=9500 [emby]=8000)
declare -A PROFILE_RETRY_COUNT=([arrs_stack]=3 [critical-data]=3 [gmer4lfe]=3 [important-data]=3 [emby]=3)
declare -A PROFILE_SLEEP=([arrs_stack]=300 [critical-data]=300 [gmer4lfe]=300 [important-data]=300 [emby]=300)
declare -A PROFILE_CRITICAL_CONTAINER_NAMES=(
    [arrs_stack]="Sonarr Lidarr Readarr Radarr Prowlarr Bazarr Pinchflat"
    [critical-data]="Mariadb-Authelia Redis-Authelia Lldap-Gmer4Lfe NginxProxyManager Authelia"
    [gmer4lfe]="Organizrv2-Gmer4Lfe UptimeKuma-Gmer4Lfe VaultWarden-Gmer4Lfe"
    [important-data]="Postgres-NextCloud NextCloud"
    [emby]=""
)
declare -A PROFILE_DELAYED_CONTAINERS=([arrs_stack]="" [critical-data]="Authelia" [gmer4lfe]="" [important-data]="NextCloud" [emby]="")
declare -A PROFILE_CONTAINER_DELAY=([arrs_stack]=5 [critical-data]=10 [gmer4lfe]=5 [important-data]=10 [emby]=5)
declare -A PROFILE_EXCLUDE_DIRS=([arrs_stack]="logs *.tmp" [critical-data]="logs *.tmp" [gmer4lfe]="logs *.tmp" [important-data]="logs *.tmp" [emby]="logs *.tmp")

# ----------------------------- Common Helpers -----------------------------
parse_args() {
    DRY_RUN=${DRY_RUN:-false}
    for ARG in "$@"; do
        if [[ "$ARG" == *=* ]]; then
            local VAR_NAME="${ARG%%=*}"
            local VAR_VALUE="${ARG#*=}"
            if declare -p "$VAR_NAME" &>/dev/null; then
                printf -v "$VAR_NAME" '%s' "$VAR_VALUE"
                echo "Overriding $VAR_NAME -> $VAR_VALUE"
            else
                echo "Warning: Unknown variable $VAR_NAME, ignoring."
            fi
        else
            case "$ARG" in
                --dry-run|-n) DRY_RUN=true ;;
                --help|-h) echo "Usage: script [--dry-run|-n] [VAR=value ...]"; exit 0 ;;
                *) echo "Warning: Unknown argument $ARG" ;;
            esac
        fi
    done
}

require_var() {
    local var="$1"
    if [[ -z "${!var:-}" ]]; then
        echo "Error: Required variable $var is not set."
        exit 1
    fi
}

validate_int() {
    local name="$1"
    local value="$2"
    if ! [[ "${value:-}" =~ ^[0-9]+$ ]]; then
        echo "Error: $name must be a non-negative integer."
        exit 1
    fi
}

# ----------------------------- Host Detection & SSH -----------------------------
# Detect local/remote host
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"

# SSH Key Mapping
declare -A SSH_KEYS
SSH_KEYS["$HOST1|$HOST2"]="$HOST1_SSH_KEY"
SSH_KEYS["$HOST2|$HOST1"]="$HOST2_SSH_KEY"
KEY_ID="$LOCAL_SERVER_NAME|$REMOTE_SERVER_NAME"
SSH_KEY="${SSH_KEYS[$KEY_ID]}"
if [[ -z "$SSH_KEY" ]]; then
    echo "Error: No SSH key defined for $LOCAL_SERVER_NAME → $REMOTE_SERVER_NAME"
    exit 1
fi
echo "Using SSH key: $SSH_KEY"

# Remote IP via Tailscale
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
echo "Remote IP: $REMOTE_SERVER"