#!/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}"

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_FHD="${VIDEO_ID_FHD:-${VIDEO_ID:-kujXXtoHUbc}}"
VIDEO_ID_VERTICAL="${VIDEO_ID_VERTICAL:-}"
POST_VIDEO_REDIRECT_URL_FHD="${POST_VIDEO_REDIRECT_URL_FHD:-${POST_VIDEO_REDIRECT_URL:-https://www.youtube.com/watch?v=kujXXtoHUbc}}"
POST_VIDEO_REDIRECT_URL_VERTICAL="${POST_VIDEO_REDIRECT_URL_VERTICAL:-}"
POST_VIDEO_REDIRECT_ENABLED="${POST_VIDEO_REDIRECT_ENABLED:-true}"
POST_VIDEO_REDIRECT_ENABLED_FHD="${POST_VIDEO_REDIRECT_ENABLED_FHD:-$POST_VIDEO_REDIRECT_ENABLED}"
POST_VIDEO_REDIRECT_ENABLED_VERTICAL="${POST_VIDEO_REDIRECT_ENABLED_VERTICAL:-$POST_VIDEO_REDIRECT_ENABLED}"

OG_IMAGE_URL="https://img.youtube.com/vi/${VIDEO_ID_FHD}/maxresdefault.jpg"

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

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

VIDEO_ID_FHD_JS="$(escape_js "$VIDEO_ID_FHD")"
VIDEO_ID_VERTICAL_JS="$(escape_js "$VIDEO_ID_VERTICAL")"
POST_VIDEO_REDIRECT_URL_FHD_JS="$(escape_js "$POST_VIDEO_REDIRECT_URL_FHD")"
POST_VIDEO_REDIRECT_URL_VERTICAL_JS="$(escape_js "$POST_VIDEO_REDIRECT_URL_VERTICAL")"
POST_VIDEO_REDIRECT_ENABLED_FHD_JS="$(parse_bool_js "$POST_VIDEO_REDIRECT_ENABLED_FHD")"
POST_VIDEO_REDIRECT_ENABLED_VERTICAL_JS="$(parse_bool_js "$POST_VIDEO_REDIRECT_ENABLED_VERTICAL")"

export SITE_TITLE SITE_SHORT_NAME SITE_BASE_URL SITE_DESCRIPTION TWITTER_DESCRIPTION SITE_OG_IMAGE_ALT
export THEME_COLOR FAVICON_48 FAVICON_180 FAVICON_512 OG_IMAGE_URL
export VIDEO_ID_FHD_JS VIDEO_ID_VERTICAL_JS POST_VIDEO_REDIRECT_URL_FHD_JS POST_VIDEO_REDIRECT_URL_VERTICAL_JS POST_VIDEO_REDIRECT_ENABLED_FHD_JS POST_VIDEO_REDIRECT_ENABLED_VERTICAL_JS

TEMPLATE_VARS='${SITE_TITLE} ${SITE_SHORT_NAME} ${SITE_BASE_URL} ${SITE_DESCRIPTION} ${TWITTER_DESCRIPTION} ${SITE_OG_IMAGE_ALT} ${THEME_COLOR} ${FAVICON_48} ${FAVICON_180} ${FAVICON_512} ${OG_IMAGE_URL} ${VIDEO_ID_FHD_JS} ${VIDEO_ID_VERTICAL_JS} ${POST_VIDEO_REDIRECT_URL_FHD_JS} ${POST_VIDEO_REDIRECT_URL_VERTICAL_JS} ${POST_VIDEO_REDIRECT_ENABLED_FHD_JS} ${POST_VIDEO_REDIRECT_ENABLED_VERTICAL_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"