#!/bin/sh
# Generuje index.html i site.webmanifest z zmiennych środowiskowych (.env).
set -eu

SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
TEMPLATE_DIR="${TEMPLATE_DIR:-$SCRIPT_DIR}"
cd "$SCRIPT_DIR"

if [ -n "${1:-}" ]; then
  OUTPUT_DIR="$1"
elif [ -d /usr/share/nginx/html ]; then
  OUTPUT_DIR="/usr/share/nginx/html"
else
  OUTPUT_DIR="."
fi

# --- Domyślne wartości szablonu ---
SITE_TITLE="${SITE_TITLE:-Slavic Pulse}"
SITE_SHORT_NAME="${SITE_SHORT_NAME:-Slavic Pulse}"
SITE_BASE_URL="${SITE_BASE_URL:-https://slavic-pulse.com}"
SITE_DESCRIPTION="${SITE_DESCRIPTION:-Lokalne modele LLM, własny serwer AI (Proxmox, TrueNAS, Ubuntu), RAG, Ollama, Open WebUI, bezpieczny self-hosting i wdrożenia biznesowe lokalnej AI.}"
TWITTER_DESCRIPTION="${TWITTER_DESCRIPTION:-$SITE_DESCRIPTION}"
SITE_OG_IMAGE_ALT="${SITE_OG_IMAGE_ALT:-Slavic Pulse}"
THEME_COLOR="${THEME_COLOR:-#000000}"

BG_IMAGE="${BG_IMAGE:-/assets/imgs/www-bg-slavic-pulse-com-001.jpg}"
FAVICON_48="${FAVICON_48:-/assets/imgs/favico/48x48.png}"
FAVICON_180="${FAVICON_180:-/assets/imgs/favico/180x180.png}"
FAVICON_512="${FAVICON_512:-/assets/imgs/favico/512x512.png}"

VIDEO_ID="${VIDEO_ID:-kujXXtoHUbc}"
POST_VIDEO_REDIRECT_URL="${POST_VIDEO_REDIRECT_URL:-https://www.youtube.com/watch?v=kujXXtoHUbc}"
POST_VIDEO_REDIRECT_ENABLED="${POST_VIDEO_REDIRECT_ENABLED:-true}"

OG_IMAGE_URL="${SITE_BASE_URL}${BG_IMAGE}"

escape_js() {
  printf '%s' "$1" | sed "s/'/\\\\'/g"
}

VIDEO_ID_JS="$(escape_js "$VIDEO_ID")"
POST_VIDEO_REDIRECT_URL_JS="$(escape_js "$POST_VIDEO_REDIRECT_URL")"
BG_IMAGE_JS="$(escape_js "$BG_IMAGE")"

case "$(printf '%s' "$POST_VIDEO_REDIRECT_ENABLED" | tr '[:upper:]' '[:lower:]')" in
  true|1|yes|on) POST_VIDEO_REDIRECT_ENABLED_JS=true ;;
  *) POST_VIDEO_REDIRECT_ENABLED_JS=false ;;
esac

export SITE_TITLE SITE_SHORT_NAME SITE_BASE_URL SITE_DESCRIPTION TWITTER_DESCRIPTION SITE_OG_IMAGE_ALT
export THEME_COLOR BG_IMAGE FAVICON_48 FAVICON_180 FAVICON_512 OG_IMAGE_URL
export VIDEO_ID_JS POST_VIDEO_REDIRECT_URL_JS BG_IMAGE_JS POST_VIDEO_REDIRECT_ENABLED_JS

TEMPLATE_VARS='${SITE_TITLE} ${SITE_SHORT_NAME} ${SITE_BASE_URL} ${SITE_DESCRIPTION} ${TWITTER_DESCRIPTION} ${SITE_OG_IMAGE_ALT} ${THEME_COLOR} ${BG_IMAGE} ${FAVICON_48} ${FAVICON_180} ${FAVICON_512} ${OG_IMAGE_URL} ${VIDEO_ID_JS} ${POST_VIDEO_REDIRECT_URL_JS} ${BG_IMAGE_JS} ${POST_VIDEO_REDIRECT_ENABLED_JS}'

mkdir -p "$OUTPUT_DIR"

envsubst "$TEMPLATE_VARS" < "$TEMPLATE_DIR/index.html.template" > "$OUTPUT_DIR/index.html"
envsubst "$TEMPLATE_VARS" < "$TEMPLATE_DIR/site.webmanifest.template" > "$OUTPUT_DIR/site.webmanifest"