#!/usr/bin/env bash
# Gemeinsame Hilfsfunktionen fuer darktable-sync Scripts.
# Dieses Script wird per `source` eingebunden, nicht direkt ausgefuehrt.

CONFIG_DIR="$HOME/.config/darktable-sync"

load_config() {
    local env_file="$CONFIG_DIR/.env"
    if [ ! -f "$env_file" ]; then
        echo "Fehler: Konfiguration nicht gefunden: $env_file" >&2
        echo "Vorlage kopieren mit: cp .env.example $env_file" >&2
        exit 1
    fi
    # shellcheck source=/dev/null
    . "$env_file"
}

require_var() {
    local var_name="$1"
    if [ -z "${!var_name:-}" ]; then
        echo "Fehler: Variable '$var_name' ist nicht gesetzt in $CONFIG_DIR/.env" >&2
        exit 1
    fi
}

validate_config() {
    require_var SERVER_IP
    require_var SERVER_USER
    require_var SERVER_SSH_PORT
    require_var SERVER_DB_DIR
    require_var SERVER_PHOTO_DIR
    require_var LOCAL_DARKTABLE_DB_DIR
    require_var LOCAL_PHOTO_DIR
    require_var SYNC_BIN
    require_var DARKTABLE_BIN
}

check_dependency() {
    local cmd="$1" pkg="${2:-$1}"
    if ! command -v "$cmd" &>/dev/null; then
        echo "Fehler: '$cmd' ist nicht installiert." >&2
        echo "Installieren mit: sudo apt install $pkg" >&2
        exit 1
    fi
}

log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*"
}

ssh_server() {
    ssh -o ConnectTimeout=5 -o BatchMode=yes \
        -p "$SERVER_SSH_PORT" "$SERVER_USER@$SERVER_IP" "$@"
}

server_reachable() {
    ssh_server true 2>/dev/null
}

ask_user() {
    local title="$1" text="$2" ans
    if command -v zenity &>/dev/null; then
        zenity --question --title="$title" --text="$text" 2>/dev/null
        return $?
    elif command -v kdialog &>/dev/null; then
        kdialog --title "$title" --yesno "$text" 2>/dev/null
        return $?
    else
        read -r -p "$text [j/N] " ans || true
        [[ "$ans" =~ ^[jJyY] ]]
        return $?
    fi
}