#!/usr/bin/env bash
set -euo pipefail

TARGET_DIR="www"
SODEW_DIR="sodew"

# WordPress core (latest.zip)
WP_URL_BASE="https://wordpress.org/latest.zip"

# Plugin slugs (WordPress.org)
PLUGINS=(
  "litespeed-cache"
)

need_cmd() {
  command -v "$1" >/dev/null 2>&1 || { echo "Chybí příkaz: $1" >&2; exit 1; }
}
need_cmd curl
need_cmd unzip
need_cmd rsync
need_cmd mktemp
need_cmd date
need_cmd find
need_cmd grep
need_cmd sed

tmp="$(mktemp -d)"
cleanup() { rm -rf "$tmp"; }
trap cleanup EXIT

ts="$(date +%s)"
echo "==> TMP: $tmp"
mkdir -p "$tmp/downloads" "$tmp/extract" "$tmp/plugins"

# --- Helper: fresh download (no cache) ---
fresh_curl() {
  local url="$1"
  local out="$2"
  curl -fsSL --retry 3 --retry-delay 1 \
    -H "Cache-Control: no-cache, no-store, must-revalidate" \
    -H "Pragma: no-cache" \
    -H "Expires: 0" \
    -o "$out" \
    "$url"
}

# --- Helper: detekce verze WordPressu ---
detect_wp_version() {
  local version_file="$1/wp-includes/version.php"
  if [[ -f "$version_file" ]]; then
    grep -E "^\\\$wp_version\s*=" "$version_file" \
      | head -n1 \
      | sed -E "s/.*=\s*'([^']+)'.*/\1/"
  else
    echo "neznámá"
  fi
}

# --- Helper: detekce verze pluginu ---
detect_plugin_version() {
  local plugin_dir="$1"
  # Zkus najít verzi v PHP hlavičce hlavního souboru pluginu
  local version
  version="$(grep -rhiE "^\s*\*?\s*Version:\s*" "$plugin_dir" --include="*.php" 2>/dev/null \
    | head -n1 \
    | sed -E "s/.*[Vv]ersion:\s*([0-9A-Za-z.\-]+).*/\1/")"
  if [[ -z "$version" ]]; then
    # Fallback: zkus readme.txt (Stable tag)
    local readme="$plugin_dir/readme.txt"
    if [[ -f "$readme" ]]; then
      version="$(grep -iE "^Stable tag:" "$readme" \
        | head -n1 \
        | sed -E "s/.*[Ss]table tag:\s*([0-9A-Za-z.\-]+).*/\1/")"
    fi
  fi
  echo "${version:-neznámá}"
}

# --- Fail-fast: kontrola struktury SODEW ---
echo "==> Kontroluju SODEW zdroj"
[[ -d "$SODEW_DIR" ]] || { echo "Chybí složka: $SODEW_DIR" >&2; exit 1; }
[[ -d "$SODEW_DIR/wp-content/mu-plugins" ]] || { echo "Chybí: $SODEW_DIR/wp-content/mu-plugins/" >&2; exit 1; }

echo "==> Stahuju WordPress (vždy fresh)"
WP_URL="${WP_URL_BASE}?t=${ts}"
fresh_curl "$WP_URL" "$tmp/downloads/wordpress.zip"

echo "==> Rozbaluju WordPress"
unzip -q "$tmp/downloads/wordpress.zip" -d "$tmp/extract"
WP_SRC="$tmp/extract/wordpress"
if [[ ! -d "$WP_SRC/wp-admin" ]]; then
  echo "Chyba: WordPress nebyl správně rozbalen." >&2
  exit 1
fi

WP_VERSION="$(detect_wp_version "$WP_SRC")"
echo "    WordPress verze: ${WP_VERSION}"

# Pole pro shrnutí na konci
declare -A PLUGIN_VERSIONS

echo "==> Stahuju a rozbaluju pluginy (vždy fresh)"
for slug in "${PLUGINS[@]}"; do
  url="https://downloads.wordpress.org/plugin/${slug}.zip?t=${ts}"
  zip="$tmp/downloads/${slug}.zip"
  echo "  -> $slug"
  fresh_curl "$url" "$zip"
  unzip -q "$zip" -d "$tmp/plugins"

  plugin_dir="$tmp/plugins/$slug"
  if [[ -d "$plugin_dir" ]]; then
    pv="$(detect_plugin_version "$plugin_dir")"
  else
    pv="neznámá"
  fi
  PLUGIN_VERSIONS["$slug"]="$pv"
  echo "     verze: ${pv}"
done

echo "==> Připravuju cílovou složku"
mkdir -p "$TARGET_DIR"

echo "==> Clean deploy (mažu obsah cílové složky)"
find "$TARGET_DIR" -mindepth 1 -maxdepth 1 -exec rm -rf {} +

echo "==> Nasazuju WordPress core"
rsync -a --delete "$WP_SRC"/ "$TARGET_DIR"/

echo "==> Nasazuju pluginy do wp-content/plugins"
mkdir -p "$TARGET_DIR/wp-content/plugins"
rm -rf "$TARGET_DIR/wp-content/plugins/"* || true
rsync -a "$tmp/plugins"/ "$TARGET_DIR/wp-content/plugins/"

echo "==> Includuju vše ze SODEW do rootu WP (kromě wp-content/)"
rsync -a \
  --exclude "wp-content/" \
  "$SODEW_DIR"/ \
  "$TARGET_DIR"/

echo "==> Includuju mu-plugins ze SODEW do wp-content/mu-plugins"
mkdir -p "$TARGET_DIR/wp-content/mu-plugins"
rsync -a --delete \
  "$SODEW_DIR/wp-content/mu-plugins/" \
  "$TARGET_DIR/wp-content/mu-plugins/"

echo ""
echo "==> Hotovo."
echo ""
echo "Nasazené verze:"
echo " - WordPress: ${WP_VERSION}"
for slug in "${PLUGINS[@]}"; do
  echo " - ${slug}: ${PLUGIN_VERSIONS[$slug]}"
done